From 835fe6e6306aab80c0b5389c4d8c1cf053e40ec2 Mon Sep 17 00:00:00 2001 From: Jim Kingdon Date: Fri, 22 Oct 1993 16:03:08 +0000 Subject: [PATCH] Merge Apollo patches from Troy Rollo (troy@cbme.unsw.edu.au): * dst.h, dstread.c, config/m68k/{apollo68b.mt,tm-apollo68b.h}: New files. * config/m68k/nm-apollo68b.h: Add more defines. * configure.in: Recognize apollo target, not just host. --- gdb/ChangeLog | 6 + gdb/config/m68k/.Sanitize | 2 + gdb/config/m68k/apollo68b.mt | 3 + gdb/config/m68k/nm-apollo68b.h | 22 + gdb/config/m68k/tm-apollo68b.h | 63 ++ gdb/configure.in | 1 + gdb/dst.h | 1659 ++++++++++++++++++++++++++++++ gdb/dstread.c | 1720 ++++++++++++++++++++++++++++++++ 8 files changed, 3476 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 4a5b0157624..fb69c3e043a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,11 @@ Fri Oct 22 07:49:54 1993 Jim Kingdon (kingdon@lioth.cygnus.com) + Merge Apollo patches from Troy Rollo (troy@cbme.unsw.edu.au): + * dst.h, dstread.c, config/m68k/{apollo68b.mt,tm-apollo68b.h}: + New files. + * config/m68k/nm-apollo68b.h: Add more defines. + * configure.in: Recognize apollo target, not just host. + * configure.in: Add * to end of all OS names. Fri Oct 22 06:14:01 1993 Fred Fish (fnf@cygnus.com) diff --git a/gdb/config/m68k/.Sanitize b/gdb/config/m68k/.Sanitize index 9947f75c0ea..9ebd0b4aca3 100644 --- a/gdb/config/m68k/.Sanitize +++ b/gdb/config/m68k/.Sanitize @@ -28,6 +28,7 @@ altos.mt amix.mh amix.mt apollo68b.mh +apollo68b.mt apollo68v.mh delta68.mh delta68.mt @@ -65,6 +66,7 @@ sun3os3.mt sun3os4.mh sun3os4.mt tm-3b1.h +tm-apollo68b.h tm-delta68.h tm-m68k-em.h tm-m68k.h diff --git a/gdb/config/m68k/apollo68b.mt b/gdb/config/m68k/apollo68b.mt index e69de29bb2d..e1fb1dce408 100644 --- a/gdb/config/m68k/apollo68b.mt +++ b/gdb/config/m68k/apollo68b.mt @@ -0,0 +1,3 @@ +# Target: Apollo m68k in BSD mode +TDEPFILES= exec.o m68k-pinsn.o m68k-tdep.o dstread.o +TM_FILE= tm-apollo68b.h diff --git a/gdb/config/m68k/nm-apollo68b.h b/gdb/config/m68k/nm-apollo68b.h index 6f28b62f420..c90dfacbd88 100644 --- a/gdb/config/m68k/nm-apollo68b.h +++ b/gdb/config/m68k/nm-apollo68b.h @@ -21,3 +21,25 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define FETCH_INFERIOR_REGISTERS +/* Tell gdb that we can attach and detach other processes */ +#define ATTACH_DETACH + +#define U_REGS_OFFSET 6 + +/* This is the amount to subtract from u.u_ar0 + to get the offset in the core file of the register values. */ + +#define KERNEL_U_ADDR 0 + +#undef FLOAT_INFO /* No float info yet */ + +#define REGISTER_U_ADDR(addr, blockend, regno) \ + (addr) = (6 + 4 * (regno)) + +/* Apollos don't really have a USER area,so trying to read it from the + * process address space will fail. It does support a read from a faked + * USER area using the "PEEKUSER" ptrace call. + */ +#define PT_READ_U 3 + +#define MEM_FNS_DECLARED /* /usr/include/string.h can get it wrong */ diff --git a/gdb/config/m68k/tm-apollo68b.h b/gdb/config/m68k/tm-apollo68b.h index e69de29bb2d..fd8fbfce8ec 100644 --- a/gdb/config/m68k/tm-apollo68b.h +++ b/gdb/config/m68k/tm-apollo68b.h @@ -0,0 +1,63 @@ +/* Parameters for execution on Apollo 68k running BSD. + Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. + Contributed by Cygnus Support. + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Apollos use vector 0xb for the breakpoint vector */ + +#define BPT_VECTOR 0xb + +/* Assume we have a coprocessor. If we don't, it still shouldn't hurt */ + +#define HAVE_68881 1 + +#include "m68k/tm-m68k.h" + +#define FRAME_CHAIN_VALID(chain, thisframe) (chain != 0) + +/* These are the jmp_buf registers I could guess. There are 13 registers + * in the buffer. There are 8 data registers, 6 general address registers, + * the Frame Pointer, the Stack Pointer, the PC and the SR in the chip. I would + * guess that 12 is the SR, but we don't need that anyway. 0 and 1 have + * me stumped. 4 appears to be a5 for some unknown reason. If you care + * about this, disassemble setjmp to find out. But don't do it with gdb :) + */ + +#undef JB_SP +#undef JB_FP +#undef JB_PC +#undef JB_D0 +#undef JB_D1 +#undef JB_D2 +#undef JB_D3 +#undef JB_D4 +#undef JB_D5 + +#define JB_SP 2 +#define JB_FP 3 +#define JB_PC 5 +#define JB_D0 6 +#define JB_D1 7 +#define JB_D2 8 +#define JB_D3 9 +#define JB_D4 10 +#define JB_D5 11 + +/* How to decide if we're in a shared library function. (Probably a wrong + definintion inherited from the VxWorks config file). */ +#define IN_SOLIB_TRAMPOLINE(pc, name) (name && strcmp(name, "") == 0) diff --git a/gdb/configure.in b/gdb/configure.in index a6a0c63cbe6..2766bb793ec 100644 --- a/gdb/configure.in +++ b/gdb/configure.in @@ -222,6 +222,7 @@ m68*-hp-bsd*) gdb_target=hp300bsd ;; m68*-hp-hpux*) gdb_target=hp300hpux ;; m68*-altos-*) gdb_target=altos ;; +m68*-apollo*-bsd*) gdb_target=apollo68b ;; m68*-att-*) gdb_target=3b1 ;; m68*-ericsson-*) gdb_target=es1800 ;; m68*-isi-*) gdb_target=isi ;; diff --git a/gdb/dst.h b/gdb/dst.h index e69de29bb2d..252a3a86b8b 100644 --- a/gdb/dst.h +++ b/gdb/dst.h @@ -0,0 +1,1659 @@ +/* */ +/* Apollo object module DST (debug symbol table) description */ + +#ifndef apollo_dst_h +#define apollo_dst_h + +#if defined(apollo) && !defined(__GNUC__) +#define ALIGNED1 __attribute( (aligned(1)) ) +#else +/* Remove attribute directives from non-Apollo code: */ +#define ALIGNED1 /* nil */ +#endif + + + +/* Identification of this version of the debug symbol table. Producers of the + debug symbol table must write these values into the version number field of + the compilation unit record in .blocks . +*/ +#define dst_version_major 1 +#define dst_version_minor 3 + + +/* +** Enumeration of debug record types appearing in .blocks and .symbols ... +*/ +typedef enum + { + dst_typ_pad, /* 0 */ + dst_typ_comp_unit, /* 1 */ + dst_typ_section_tab, /* 2 */ + dst_typ_file_tab, /* 3 */ + dst_typ_block, /* 4 */ + dst_typ_5, + dst_typ_var, + dst_typ_pointer, /* 7 */ + dst_typ_array, /* 8 */ + dst_typ_subrange, /* 9 */ + dst_typ_set, /* 10 */ + dst_typ_implicit_enum, /* 11 */ + dst_typ_explicit_enum, /* 12 */ + dst_typ_short_rec, /* 13 */ + dst_typ_old_record, + dst_typ_short_union, /* 15 */ + dst_typ_old_union, + dst_typ_file, /* 17 */ + dst_typ_offset, /* 18 */ + dst_typ_alias, /* 19 */ + dst_typ_signature, /* 20 */ + dst_typ_21, + dst_typ_old_label, /* 22 */ + dst_typ_scope, /* 23 */ + dst_typ_end_scope, /* 24 */ + dst_typ_25, + dst_typ_26, + dst_typ_string_tab, /* 27 */ + dst_typ_global_name_tab, /* 28 */ + dst_typ_forward, /* 29 */ + dst_typ_aux_size, /* 30 */ + dst_typ_aux_align, /* 31 */ + dst_typ_aux_field_size, /* 32 */ + dst_typ_aux_field_off, /* 33 */ + dst_typ_aux_field_align, /* 34 */ + dst_typ_aux_qual, /* 35 */ + dst_typ_aux_var_bound, /* 36 */ + dst_typ_extension, /* 37 */ + dst_typ_string, /* 38 */ + dst_typ_old_entry, + dst_typ_const, /* 40 */ + dst_typ_reference, /* 41 */ + dst_typ_record, /* 42 */ + dst_typ_union, /* 43 */ + dst_typ_aux_type_deriv, /* 44 */ + dst_typ_locpool, /* 45 */ + dst_typ_variable, /* 46 */ + dst_typ_label, /* 47 */ + dst_typ_entry, /* 48 */ + dst_typ_aux_lifetime, /* 49 */ + dst_typ_aux_ptr_base, /* 50 */ + dst_typ_aux_src_range, /* 51 */ + dst_typ_aux_reg_val, /* 52 */ + dst_typ_aux_unit_names, /* 53 */ + dst_typ_aux_sect_info, /* 54 */ + dst_typ_END_OF_ENUM + } + dst_rec_type_t; + + +/* +** Dummy bounds for variably dimensioned arrays: +*/ +#define dst_dummy_array_size 100 + + +/* +** Reference to another item in the symbol table. +** +** The value of a dst_rel_offset_t is the relative offset from the start of the +** referencing record to the start of the referenced record, string, etc. +** +** The value of a NIL dst_rel_offset_t is zero. +*/ + +typedef long dst_rel_offset_t ALIGNED1; + + +/* FIXME: Here and many places we make assumptions about sizes of host + data types, structure layout, etc. Only needs to be fixed if we care + about cross-debugging, though. */ + +/* +** Section-relative reference. +** +** The section index field is an index into the local compilation unit's +** section table (see dst_rec_section_tab_t)--NOT into the object module +** section table! +** +** The sect_offset field is the offset in bytes into the section. +** +** A NIL dst_sect_ref_t has a sect_index field of zero. Indexes originate +** at one. +*/ + +typedef struct + { + unsigned short sect_index; + unsigned long sect_offset ALIGNED1; + } + dst_sect_ref_t; + +#define dst_sect_index_nil 0 +#define dst_sect_index_origin 1 + + +/* +** Source location descriptor. +** +** The file_index field is an index into the local compilation unit's +** file table (see dst_rec_file_tab_t). +** +** A NIL dst_src_loc_t has a file_index field of zero. Indexes originate +** at one. +*/ + +typedef struct + { + boolean reserved : 1; /* reserved for future use */ + int file_index : 11; /* index into .blocks source file list */ + int line_number : 20; /* source line number */ + } + dst_src_loc_t; + +#define dst_file_index_nil 0 +#define dst_file_index_origin 1 + + +/* +** Standard (primitive) type codes. +*/ + +typedef enum + { + dst_non_std_type, + dst_int8_type, /* 8 bit integer */ + dst_int16_type, /* 16 bit integer */ + dst_int32_type, /* 32 bit integer */ + dst_uint8_type, /* 8 bit unsigned integer */ + dst_uint16_type, /* 16 bit unsigned integer */ + dst_uint32_type, /* 32 bit unsigned integer */ + dst_real32_type, /* single precision ieee floatining point */ + dst_real64_type, /* double precision ieee floatining point */ + dst_complex_type, /* single precision complex */ + dst_dcomplex_type, /* double precision complex */ + dst_bool8_type, /* boolean =logical*1 */ + dst_bool16_type, /* boolean =logical*2 */ + dst_bool32_type, /* boolean =logical*4 */ + dst_char_type, /* 8 bit ascii character */ + dst_string_type, /* string of 8 bit ascii characters */ + dst_ptr_type, /* univ_pointer */ + dst_set_type, /* generic 256 bit set */ + dst_proc_type, /* generic procedure (signature not specified) */ + dst_func_type, /* generic function (signature not specified) */ + dst_void_type, /* c void type */ + dst_uchar_type, /* c unsigned char */ + dst_std_type_END_OF_ENUM + } + dst_std_type_t; + + +/* +** General data type descriptor +** +** If the user_defined_type bit is clear, then the type is a standard type, and +** the remaining bits contain the dst_std_type_t of the type. If the bit is +** set, then the type is defined in a separate dst record, which is referenced +** by the remaining bits as a dst_rel_offset_t. +*/ + +typedef union + { + struct + { + boolean user_defined_type : 1; /* tag field */ + int must_be_zero : 23; /* 23 bits of pad */ + dst_std_type_t dtc : 8; /* 8 bit primitive data */ + } + std_type; + + struct + { + boolean user_defined_type : 1; /* tag field */ + int doffset : 31; /* offset to type record */ + } + user_type; + } + dst_type_t ALIGNED1; + +/* The user_type.doffset field is a 31-bit signed value. Some versions of C + do not support signed bit fields. The following macro will extract that + field as a signed value: +*/ +#define dst_user_type_offset(type_rec) \ + ( ((int) ((type_rec).user_type.doffset << 1)) >> 1 ) + + +/*================================================*/ +/*========== RECORDS IN .blocks SECTION ==========*/ +/*================================================*/ + +/*----------------------- + COMPILATION UNIT record + ----------------------- + This must be the first record in each .blocks section. + Provides a set of information describing the output of a single compilation + and pointers to additional information for the compilation unit. +*/ + +typedef enum + { + dst_pc_code_locs, /* ranges in loc strings are pc ranges */ + dst_comp_unit_END_OF_ENUM + } + dst_comp_unit_flag_t; + +typedef enum + { + dst_lang_unk, /* unknown language */ + dst_lang_pas, /* Pascal */ + dst_lang_ftn, /* FORTRAN */ + dst_lang_c, /* C */ + dst_lang_mod2, /* Modula-2 */ + dst_lang_asm_m68k, /* 68K assembly language */ + dst_lang_asm_a88k, /* AT assembly language */ + dst_lang_ada, /* Ada */ + dst_lang_cxx, /* C++ */ + dst_lang_END_OF_ENUM + } + dst_lang_type_t; + +typedef struct + { + struct + { + unsigned char major_part; /* = dst_version_major */ + unsigned char minor_part; /* = dst_version_minor */ + } + version; /* version of dst */ + unsigned short flags; /* mask of dst_comp_unit_flag_t */ + unsigned short lang_type; /* source language */ + unsigned short number_of_blocks; /* number of blocks records */ + dst_rel_offset_t root_block_offset; /* offset to root block (module?) */ + dst_rel_offset_t section_table /* offset to section table record */; + dst_rel_offset_t file_table; /* offset to file table record */ + unsigned long data_size; /* total size of .blocks data */ + } + dst_rec_comp_unit_t ALIGNED1; + + +/*-------------------- + SECTION TABLE record + -------------------- + There must be one section table associated with each compilation unit. + Other debug records refer to sections via their index in this table. The + section base addresses in the table are virtual addresses of the sections, + relocated by the linker. +*/ + +typedef struct + { + unsigned short number_of_sections; /* size of array: */ + unsigned long section_base[dst_dummy_array_size] ALIGNED1; + } + dst_rec_section_tab_t ALIGNED1; + + +/*----------------- + FILE TABLE record + ----------------- + There must be one file table associated with each compilation unit describing + the source (and include) files used by each compilation unit. Other debug + records refer to files via their index in this table. The first entry is the + primary source file. +*/ + +typedef struct + { + long dtm; /* time last modified (time_$clock_t) */ + dst_rel_offset_t noffset; /* offset to name string for source file */ + } + dst_file_desc_t; + +typedef struct + { + unsigned short number_of_files; /* size of array: */ + dst_file_desc_t files[dst_dummy_array_size] ALIGNED1; + } + dst_rec_file_tab_t ALIGNED1; + + +/*----------------- + NAME TABLE record + ----------------- + A name table record may appear as an auxiliary record to the file table, + providing additional qualification of the file indexes for languages that + need it (i.e. Ada). Name table entries parallel file table entries of the + same file index. +*/ + +typedef struct + { + unsigned short number_of_names; /* size of array: */ + dst_rel_offset_t names[dst_dummy_array_size] ALIGNED1; + } + dst_rec_name_tab_t ALIGNED1; + + +/*-------------- + BLOCK record + -------------- + Describes a lexical program block--a procedure, function, module, etc. +*/ + +/* Block types. These may be used in any way desired by the compiler writers. + The debugger uses them only to give a description to the user of the type of + a block. The debugger makes no other assumptions about the meaning of any + of these. For example, the fact that a block is executable (e.g., program) + or not (e.g., module) is expressed in block attributes (see below), not + guessed at from the block type. +*/ +typedef enum + { + dst_block_module, /* some pascal = modula = ada types */ + dst_block_program, + dst_block_procedure, + dst_block_function, /* C function */ + dst_block_subroutine, /* some fortran block types */ + dst_block_block_data, + dst_block_stmt_function, + dst_block_package, /* a few particular to Ada */ + dst_block_package_body, + dst_block_subunit, + dst_block_task, + dst_block_file, /* a C outer scope? */ + dst_block_class, /* C++ or Simula */ + dst_block_END_OF_ENUM + } + dst_block_type_t; + +/* Block attributes. This is the information used by the debugger to represent + the semantics of blocks. +*/ +typedef enum + { + dst_block_main_entry, /* the block's entry point is a main entry into + the compilation unit */ + dst_block_executable, /* the block has an entry point */ + dst_block_attr_END_OF_ENUM + } + dst_block_attr_t; + +/* Code range. Each block has associated with it one or more code ranges. An + individual code range is identified by a range of source (possibly nil) and + a range of executable code. For example, a block which has its executable + code spread over multiple sections will have one code range per section. +*/ +typedef struct + { + unsigned long code_size; /* size of executable code (in bytes ) */ + dst_sect_ref_t code_start; /* starting address of executable code */ + dst_sect_ref_t lines_start; /* start of line number tables */ + } + dst_code_range_t; + +typedef struct + { + dst_block_type_t block_type : 8; + unsigned short flags : 8; /* mask of dst_block_attr_t flags */ + dst_rel_offset_t sibling_block_off; /* offset to next sibling block */ + dst_rel_offset_t child_block_off; /* offset to first contained block */ + dst_rel_offset_t noffset; /* offset to block name string */ + dst_sect_ref_t symbols_start; /* start of debug symbols */ + unsigned short n_of_code_ranges; /* size of array... */ + dst_code_range_t code_ranges[dst_dummy_array_size] ALIGNED1; + } + dst_rec_block_t ALIGNED1; + + +/*-------------------------- + AUX SECT INFO TABLE record + -------------------------- + Appears as an auxiliary to a block record. Expands code range information + by providing references into additional, language-dependent sections for + information related to specific code ranges of the block. Sect info table + entries parallel code range array entries of the same index. +*/ + +typedef struct + { + unsigned char tag; /* currently can only be zero */ + unsigned char number_of_refs; /* size of array: */ + dst_sect_ref_t refs[dst_dummy_array_size] ALIGNED1; + } + dst_rec_sect_info_tab_t ALIGNED1; + +/*=================================================*/ +/*========== RECORDS IN .symbols SECTION ==========*/ +/*=================================================*/ + +/*----------------- + CONSTANT record + ----------------- + Describes a symbolic constant. +*/ + +typedef struct + { + float r; /* real part */ + float i; /* imaginary part */ + } + dst_complex_t; + +typedef struct + { + double dr; /* real part */ + double di; /* imaginary part */ + } + dst_double_complex_t; + +/* The following record provides a way of describing constant values with + non-standard type and no limit on size. +*/ +typedef union + { + char char_data[dst_dummy_array_size]; + short int_data [dst_dummy_array_size]; + long long_data[dst_dummy_array_size]; + } + dst_big_kon_t; + +/* Representation of the value of a general constant. +*/ +typedef struct + { + unsigned short length; /* size of constant value (bytes) */ + + union + { + unsigned short kon_int8; + short kon_int16; + long kon_int32 ALIGNED1; + float kon_real ALIGNED1; + double kon_dbl ALIGNED1; + dst_complex_t kon_cplx ALIGNED1; + dst_double_complex_t kon_dcplx ALIGNED1; + char kon_char; + dst_big_kon_t kon ALIGNED1; + } + val; /* value data of constant */ + } + dst_const_t ALIGNED1; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of const definition */ + dst_type_t type_desc; /* type of this (manifest) constant */ + dst_const_t value; + } + dst_rec_const_t ALIGNED1; + +/*---------------- + VARIABLE record + ---------------- + Describes a program variable. +*/ + +/* Variable attributes. These define certain variable semantics to the + debugger. +*/ +typedef enum + { + dst_var_attr_read_only, /* is read-only (a program literal) */ + dst_var_attr_volatile, /* same as compiler's VOLATILE attribute */ + dst_var_attr_global, /* is a global definition or reference */ + dst_var_attr_compiler_gen, /* is compiler-generated */ + dst_var_attr_static, /* has static location */ + dst_var_attr_END_OF_ENUM + } + dst_var_attr_t; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_rel_offset_t loffset; /* offset to loc string */ + dst_src_loc_t src_loc; /* file/line of variable definition */ + dst_type_t type_desc; /* type descriptor */ + unsigned short attributes; /* mask of dst_var_attr_t flags */ + } + dst_rec_variable_t ALIGNED1; + + +/*---------------- + old VAR record + ----------------- + Used by older compilers to describe a variable +*/ + +typedef enum + { + dst_var_loc_unknown, /* Actually defined as "unknown" */ + dst_var_loc_abs, /* Absolute address */ + dst_var_loc_sect_off, /* Absolute address as a section offset */ + dst_var_loc_ind_sect_off, /* An indexed section offset ???? */ + dst_var_loc_reg, /* register */ + dst_var_loc_reg_rel, /* register relative - usually fp */ + dst_var_loc_ind_reg_rel, /* Indexed register relative */ + dst_var_loc_ftn_ptr_based, /* Fortran pointer based */ + dst_var_loc_pc_rel, /* PC relative. Really. */ + dst_var_loc_external, /* External */ + dst_var_loc_END_OF_ENUM + } + dst_var_loc_t; + +/* Locations come in two versions. The sort, and the long. The difference + * between the short and the long is the addition of a statement number + * field to the start andend of the range of the long, and and unkown + * purpose field in the middle. Also, loc_type and loc_index aren't + * bitfields in the long version. + */ + +typedef struct + { + unsigned short loc_type : 4; + unsigned short loc_index : 12; + long location; + short start_line; /* start_line and end_line? */ + short end_line; /* I'm guessing here. */ + } dst_var_loc_short_t; + +typedef struct + { + unsigned short loc_type; + unsigned short loc_index; + long location; + short unknown; /* Always 0003 or 3b3c. Why? */ + short start_statement; + short start_line; + short end_statement; + short end_line; + } dst_var_loc_long_t; + + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of description */ + dst_type_t type_desc; /* Type description */ + unsigned short attributes; /* mask of dst_var_attr_t flags */ + unsigned short no_of_locs : 15;/* Number of locations */ + unsigned short short_locs : 1; /* True if short locations. */ + union + { + dst_var_loc_short_t shorts[dst_dummy_array_size]; + dst_var_loc_long_t longs[dst_dummy_array_size]; + } locs; + } dst_rec_var_t; + +/*---------------- + old LABEL record + ----------------- + Used by older compilers to describe a label +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of description */ + char location[12]; /* location string */ + } + dst_rec_old_label_t ALIGNED1; + +/*---------------- + POINTER record + ---------------- + Describes a pointer type. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to the name string for this type */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_type_t type_desc; /* base type of this pointer */ + } + dst_rec_pointer_t ALIGNED1; + + +/*------------- + ARRAY record + ------------- + Describes an array type. + + Multidimensional arrays are described with a number of dst_rec_array_t + records, one per array dimension, each linked to the next through the + elem_type_desc.doffset field. Each record must have its multi_dim flag + set. + + If column_major is true (as with FORTRAN arrays) then the last array bound in + the declaration is the first array index in memory, which is the opposite of + the usual case (as with Pascal and C arrays). + + Variable array bounds are described by auxiliary records; if aux_var_bound + records are present, the lo_bound and hi_bound fields of this record are + ignored by the debugger. + + span_comp identifies one of the language-dependent ways in which the distance + between successive array elements (span) is calculated. + dst_use_span_field -- the span is the value of span field. + dst_compute_from_prev -- the span is the size of the previous dimension. + dst_compute_from_next -- the span is the size of the next dimension. + In the latter two cases, the span field contains an amount of padding to add + to the size of the appropriate dimension to calculate the span. +*/ + +typedef enum + { + dst_use_span_field, + dst_compute_from_prev, + dst_compute_from_next, + dst_span_comp_END_OF_ENUM + } + dst_span_comp_t; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_type_t elem_type_desc; /* array element type */ + dst_type_t indx_type_desc; /* array index type */ + long lo_bound; /* lower bound of index */ + long hi_bound; /* upper bound of index */ + unsigned long span; /* see above */ + unsigned long size; /* total array size (bytes) */ + boolean multi_dim : 1; + boolean is_packed : 1; /* true if packed array */ + boolean is_signed : 1; /* true if packed elements are signed */ + dst_span_comp_t span_comp : 2; /* how to compute span */ + boolean column_major : 1; + unsigned short reserved : 2; /* must be zero */ + unsigned short elem_size : 8; /* element size if packed (bits) */ + } + dst_rec_array_t ALIGNED1; + + +/*----------------- + SUBRANGE record + ----------------- + Describes a subrange type. +*/ + +/* Variable subrange bounds are described by auxiliary records; if aux_var_bound + records are present, the lo_bound and hi_bound fields of this record are + ignored by the debugger. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of subrange definition */ + dst_type_t type_desc; /* parent type */ + long lo_bound; /* lower bound of subrange */ + long hi_bound; /* upper bound of subrange */ + unsigned short size; /* storage size (bytes) */ + } + dst_rec_subrange_t ALIGNED1; + + +/*--------------- + STRING record + --------------- + Describes a string type. +*/ + +/* Variable subrange bounds are described by auxiliary records; if aux_var_bound + records are present, the lo_bound and hi_bound fields of this record are + ignored by the debugger. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of string definition */ + dst_type_t elem_type_desc; /* element type */ + dst_type_t indx_type_desc; /* index type */ + long lo_bound; /* lower bound */ + long hi_bound; /* upper bound */ + unsigned long size; /* total string size (bytes) if fixed */ + } + dst_rec_string_t ALIGNED1; + + +/*--------------- + SET record + --------------- + Describes a set type. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_type_t type_desc; /* element type */ + unsigned short nbits; /* number of bits in set */ + unsigned short size; /* storage size (bytes) */ + } + dst_rec_set_t ALIGNED1; + + +/*----------------------------- + IMPLICIT ENUMERATION record + ----------------------------- + Describes an enumeration type with implicit element values = 0, 1, 2, ... + (Pascal-style). +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + unsigned short nelems; /* number of elements in enumeration */ + unsigned short size; /* storage size (bytes) */ + /* offsets to name strings of elements 0, 1, 2, ... */ + dst_rel_offset_t elem_noffsets[dst_dummy_array_size]; + } + dst_rec_implicit_enum_t ALIGNED1; + + +/*----------------------------- + EXPLICIT ENUMERATION record + ----------------------------- + Describes an enumeration type with explicitly assigned element values + (C-style). +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to element name string */ + long value; /* element value */ + } + dst_enum_elem_t; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + unsigned short nelems; /* number of elements in enumeration */ + unsigned short size; /* storage size (bytes) */ + /* name/value pairs, one describing each enumeration value: */ + dst_enum_elem_t elems[dst_dummy_array_size]; + } + dst_rec_explicit_enum_t ALIGNED1; + + +/*----------------------- + RECORD / UNION record + ----------------------- + Describes a record (struct) or union. + + If the record is larger than 2**16 bytes then an attached aux record + specifies its size. Also, if the record is stored in short form then + attached records specify field offsets larger than 2**16 bytes. + + Whether the fields[] array or sfields[] array is used is selected by + the dst_rec_type_t of the overall dst record. +*/ + +/* + Record field descriptor, short form. This form handles only fields which + are an even number of bytes long, located some number of bytes from the + start of the record. +*/ +typedef struct + { + dst_rel_offset_t noffset; /* offset to field name string */ + dst_type_t type_desc; /* field type */ + unsigned short foffset; /* field offset from start of record (bytes) */ + } + dst_short_field_t ALIGNED1; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_type_t type_desc; /* field type */ + unsigned short foffset; /* byte offset */ + unsigned short is_packed : 1; /* True if field is packed */ + unsigned short bit_offset : 6; /* Bit offset */ + unsigned short size : 6; /* Size in bits */ + unsigned short sign : 1; /* True if signed */ + unsigned short pad : 2; /* Padding. Must be 0 */ + } + dst_old_field_t ALIGNED1; + +/* Tag enumeration for long record field descriptor: +*/ +typedef enum + { + dst_field_byte, + dst_field_bit, + dst_field_loc, + dst_field_END_OF_ENUM + } + dst_field_format_t; + +/* + Record field descriptor, long form. The format of the field information + is identified by the format_tag, which contains one of the above values. + The field_byte variant is equivalent to the short form of field descriptor. + The field_bit variant handles fields which are any number of bits long, + located some number of bits from the start of the record. The field_loc + variant allows the location of the field to be described by a general loc + string. +*/ +typedef struct + { + dst_rel_offset_t noffset; /* offset to name of field */ + dst_type_t type_desc; /* type of field */ + union + { + struct { + dst_field_format_t format_tag: 2; /* dst_field_byte */ + unsigned long offset: 30; /* offset of field in bytes */ + } + field_byte ALIGNED1; + struct { + dst_field_format_t format_tag: 2; /* dst_field_bit */ + unsigned long nbits: 6; /* bit size of field */ + unsigned long is_signed: 1; /* signed/unsigned attribute */ + unsigned long bit_offset: 3; /* bit offset from byte boundary */ + int pad: 4; /* must be zero */ + unsigned short byte_offset; /* offset of byte boundary */ + } + field_bit ALIGNED1; + struct { + dst_field_format_t format_tag: 2; /* dst_field_loc */ + int loffset: 30; /* dst_rel_offset_t to loc string */ + } + field_loc ALIGNED1; + } + f ALIGNED1; + } + dst_field_t; + +/* The field_loc.loffset field is a 30-bit signed value. Some versions of C do + not support signed bit fields. The following macro will extract that field + as a signed value: +*/ +#define dst_field_loffset(field_rec) \ + ( ((int) ((field_rec).f.field_loc.loffset << 2)) >> 2 ) + + +typedef struct + { + dst_rel_offset_t noffset; /* offset to record name string */ + dst_src_loc_t src_loc; /* file/line where this record is defined */ + unsigned short size; /* storage size (bytes) */ + unsigned short nfields; /* number of fields in this record */ + union + { + dst_field_t fields[dst_dummy_array_size]; + dst_short_field_t sfields[dst_dummy_array_size]; + dst_old_field_t ofields[dst_dummy_array_size]; + } + f; /* array of fields */ + } + dst_rec_record_t ALIGNED1; + + +/*------------- + FILE record + ------------- + Describes a file type. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line where type was defined */ + dst_type_t type_desc; /* file element type */ + } + dst_rec_file_t ALIGNED1; + + +/*--------------- + OFFSET record + --------------- + Describes a Pascal offset type. + (This type, an undocumented Domain Pascal extension, is currently not + supported by the debugger) +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to the name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_type_t area_type_desc; /* area type */ + dst_type_t base_type_desc; /* base type */ + long lo_bound; /* low bound of the offset range */ + long hi_bound; /* high bound of the offset range */ + long bias; /* bias */ + unsigned short scale; /* scale factor */ + unsigned short size; /* storage size (bytes) */ + } + dst_rec_offset_t ALIGNED1; + + +/*-------------- + ALIAS record + -------------- + Describes a type alias (e.g., typedef). +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_type_t type_desc; /* parent type */ + } + dst_rec_alias_t ALIGNED1; + + +/*------------------ + SIGNATURE record + ------------------ + Describes a procedure/function type. +*/ + +/* Enumeration of argument semantics. Note that most are mutually + exclusive. +*/ +typedef enum + { + dst_arg_attr_val, /* passed by value */ + dst_arg_attr_ref, /* passed by reference */ + dst_arg_attr_name, /* passed by name */ + dst_arg_attr_in, /* readable in the callee */ + dst_arg_attr_out, /* writable in the callee */ + dst_arg_attr_hidden, /* not visible in the caller */ + dst_arg_attr_END_OF_ENUM + } + dst_arg_attr_t; + +/* Argument descriptor. Actually points to a variable record for most of the + information. +*/ +typedef struct + { + dst_rel_offset_t var_offset; /* offset to variable record */ + unsigned short attributes; /* a mask of dst_arg_attr_t flags */ + } + dst_arg_t ALIGNED1; + +typedef struct + { + dst_rel_offset_t noffset; /* offset to name string */ + dst_src_loc_t src_loc; /* file/line of function definition */ + dst_rel_offset_t result; /* offset to function result variable record */ + unsigned short nargs; /* number of arguments */ + dst_arg_t args[dst_dummy_array_size]; + } + dst_rec_signature_t ALIGNED1; + +/*-------------- + SCOPE record + -------------- + Obsolete. Use the new ENTRY type instead. + Old compilers may put this in as the first entry in a function, + terminated by an end of scope entry. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* Name offset */ + dst_src_loc_t start_line; /* Starting line */ + dst_src_loc_t end_line; /* Ending line */ + } + dst_rec_scope_t ALIGNED1; + +/*-------------- + ENTRY record + -------------- + Describes a procedure/function entry point. An entry record is to a + signature record roughly as a variable record is to a type descriptor record. + + The entry_number field is keyed to the entry numbers in .lines -- the + debugger locates the code location of an entry by searching the line + number table for an entry numbered with the value of entry_number. The + main entry is numbered zero. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to entry name string */ + dst_rel_offset_t loffset; /* where to jump to call this entry */ + dst_src_loc_t src_loc; /* file/line of definition */ + dst_rel_offset_t sig_desc; /* offset to signature descriptor */ + unsigned int entry_number: 8; + int pad: 8; /* must be zero */ + } + dst_rec_entry_t ALIGNED1; + +/*----------------------- + Old format ENTRY record + ----------------------- + Supposedly obsolete but still used by some compilers. + */ + +typedef struct + { + dst_rel_offset_t noffset; /* Offset to entry name string */ + dst_src_loc_t src_loc; /* Location in source */ + dst_rel_offset_t sig_desc; /* Signature description */ + char unknown[36]; + } + dst_rec_old_entry_t ALIGNED1; + +/*-------------- + LABEL record + -------------- + Describes a program label. +*/ + +typedef struct + { + dst_rel_offset_t noffset; /* offset to label string */ + dst_rel_offset_t loffset; /* offset to loc string */ + dst_src_loc_t src_loc; /* file/line of definition */ + } + dst_rec_label_t ALIGNED1; + + +/*----------------------- + AUXILIARY SIZE record + ----------------------- + May appear in the auxiliary record list of any type or variable record to + modify the default size of the type or variable. +*/ + +typedef struct + { + unsigned long size; /* size (bytes) */ + } + dst_rec_aux_size_t ALIGNED1; + + +/*----------------------- + AUXILIARY ALIGN record + ----------------------- + May appear in the auxiliary record list of any type or variable record to + modify the default alignment of the type or variable. +*/ + +typedef struct + { + unsigned short alignment; /* # of low order zero bits */ + } + dst_rec_aux_align_t ALIGNED1; + + +/*----------------------------- + AUXILIARY FIELD SIZE record + ----------------------------- + May appear in the auxiliary record list of any RECORD/UNION record to + modify the default size of a field. +*/ + +typedef struct + { + unsigned short field_no; /* field number */ + unsigned long size; /* size (bits) */ + } + dst_rec_aux_field_size_t ALIGNED1; + + + +/*----------------------------- + AUXILIARY FIELD OFFSET record + ----------------------------- + May appear in the auxiliary record list of any RECORD/UNION record to + specify a field offset larger than 2**16. +*/ + +typedef struct + { + unsigned short field_no; /* field number */ + unsigned long foffset; /* offset */ + } + dst_rec_aux_field_off_t ALIGNED1; + + +/*----------------------------- + AUXILIARY FIELD ALIGN record + ----------------------------- + May appear in the auxiliary record list of any RECORD/UNION record to + modify the default alignment of a field. +*/ + +typedef struct + { + unsigned short field_no; /* field number */ + unsigned short alignment; /* number of low order zero bits */ + } + dst_rec_aux_field_align_t ALIGNED1; + + +/*---------------------------- + AUXILIARY VAR BOUND record + ---------------------------- + May appear in the auxiliary record list of any ARRAY, SUBRANGE or STRING + record to describe a variable bound for the range of the type. +*/ + +typedef enum + { + dst_low_bound, /* the low bound is variable */ + dst_high_bound, /* the high bound is variable */ + dst_var_bound_END_OF_ENUM + } + dst_var_bound_t; + +typedef struct + { + unsigned short which; /* which bound */ + dst_rel_offset_t voffset ALIGNED1; /* variable that defines bound */ + } + dst_rec_aux_var_bound_t ALIGNED1; + + +/*---------------------------------- + AUXILIARY TYPE DERIVATION record + ---------------------------------- + May appear in the auxiliary record list of any RECORD/UNION record to denote + class inheritance of that type from a parent type. + + Inheritance implies that it is possible to convert the inheritor type to the + inherited type, retaining those fields which were inherited. To allow this, + orig_field_no, a field number into the record type, is provided. If + orig_is_pointer is false, then the start of the inherited record is located + at the location of the field indexed by orig_field_no. If orig_is_pointer + is true, then it is located at the address contained in the field indexed + by orig_field_no (assumed to be a pointer). +*/ + +typedef struct + { + dst_type_t parent_type; /* reference to inherited type */ + unsigned short orig_field_no; + boolean orig_is_pointer: 1; + int unused: 15; /* must be zero */ + } + dst_rec_aux_type_deriv_t ALIGNED1; + + +/*------------------------------------ + AUXILIARY VARIABLE LIFETIME record + ------------------------------------ + May appear in the auxiliary record list of a VARIABLE record to add location + information for an additional variable lifetime. +*/ + +typedef struct + { + dst_rel_offset_t loffset; + } + dst_rec_aux_lifetime_t ALIGNED1; + + +/*------------------------------- + AUXILIARY POINTER BASE record + ------------------------------- + May appear in the auxiliary record list of a VARIABLE record to provide a + pointer base to substitute for references to any such bases in the location + string of the variable. A pointer base is another VARIABLE record. When + the variable is evaluated by the debugger, it uses the current value of the + pointer base variable in computing its location. + + This is useful for representing FORTRAN pointer-based variables. +*/ + +typedef struct + { + dst_rel_offset_t voffset; + } + dst_rec_aux_ptr_base_t ALIGNED1; + + +/*--------------------------------- + AUXILIARY REGISTER VALUE record + --------------------------------- + May appear in the auxiliary record list of an ENTRY record to specify + a register that must be set to a specific value before jumping to the entry + point in a debugger "call". The debugger must set the debuggee register, + specified by the register code, to the value of the *address* to which the + location string resolves. If the address is register-relative, then the + call cannot be made unless the current stack frame is the lexical parent + of the entry. An example of this is when a (Pascal) nested procedure + contains references to its parent's variables, which it accesses through + a static link register. The static link register must be set to some + address relative to the parent's stack base register. +*/ + +typedef struct + { + unsigned short reg; /* identifies register to set (isp enum) */ + dst_rel_offset_t loffset; /* references a location string */ + } + dst_rec_aux_reg_val_t ALIGNED1; + + +/*==========================================================*/ +/*========== RECORDS USED IN .blocks AND .symbols ==========*/ +/*==========================================================*/ + +/*--------------------- + STRING TABLE record + --------------------- + A string table record contains any number of null-terminated, variable length + strings. The length field gives the size in bytes of the text field, which + can be any size. + + The global name table shares this format. This record appears in the + .blocks section. Each string in the table identifies a global defined in + the current compilation unit. + + The loc pool record shares this format as well. Loc strings are described + elsewhere. +*/ + +typedef struct + { + unsigned long length; + char text[dst_dummy_array_size]; + } + dst_rec_string_tab_t ALIGNED1; + + +/*----------------------- + AUXILIARY QUAL record + ----------------------- + May appear in the auxiliary record list of any BLOCK, VARIABLE, or type record + to provide it with a fully-qualified, language-dependent name. +*/ + +typedef struct + { + dst_rel_offset_t lang_qual_name; + } + dst_rec_aux_qual_t ALIGNED1; + + +/*---------------- + FORWARD record + ---------------- + Reference to a record somewhere else. This allows identical definitions in + different scopes to share data. +*/ + +typedef struct + { + dst_rel_offset_t rec_off; + } + dst_rec_forward_t ALIGNED1; + + +/*------------------------------- + AUXILIARY SOURCE RANGE record + ------------------------------- + May appear in the auxiliary record list of any BLOCK record to specify a + range of source lines over which the block is active. +*/ + +typedef struct + { + dst_src_loc_t first_line; /* first source line */ + dst_src_loc_t last_line; /* last source line */ + } + dst_rec_aux_src_range_t ALIGNED1; + + +/*------------------ + EXTENSION record + ------------------ + Provision for "foreign" records, such as might be generated by a non-Apollo + compiler. Apollo software will ignore these. +*/ + +typedef struct + { + unsigned short rec_size; /* record size (bytes) */ + unsigned short ext_type; /* defined by whoever generates it */ + unsigned short ext_data; /* place-holder for arbitrary amount of data */ + } + dst_rec_extension_t ALIGNED1; + + +/* +** DEBUG SYMBOL record -- The wrapper for all .blocks and .symbols records. +** +** This record ties together all previous .blocks and .symbols records +** together in a union with a common header. The rec_type field of the +** header identifies the record type. The rec_flags field currently only +** defines auxiliary record lists. +** +** If a record carries with it a non-null auxiliary record list, its +** dst_flag_has_aux_recs flag is set, and each of the records that follow +** it are treated as its auxiliary records, until the end of the compilation +** unit or scope is reached, or until an auxiliary record with its +** dst_flag_last_aux_rec flag set is reached. +*/ + +typedef enum + { + dst_flag_has_aux_recs, + dst_flag_last_aux_rec, + dst_rec_flag_END_OF_ENUM + } + dst_rec_flags_t; + +typedef struct + { + dst_rec_type_t rec_type : 8; /* record type */ + int rec_flags: 8; /* mask of dst_rec_flags_t */ + union /* switched on rec_type field above */ + { + /* dst_typ_pad requires no additional fields */ + dst_rec_comp_unit_t comp_unit_; + dst_rec_section_tab_t section_tab_; + dst_rec_file_tab_t file_tab_; + dst_rec_block_t block_; + dst_rec_var_t var_; + dst_rec_pointer_t pointer_; + dst_rec_array_t array_; + dst_rec_subrange_t subrange_; + dst_rec_set_t set_; + dst_rec_implicit_enum_t implicit_enum_; + dst_rec_explicit_enum_t explicit_enum_; + /* dst_typ_short_{rec,union} are represented by 'rec' (below) */ + dst_rec_file_t file_; + dst_rec_offset_t offset_; + dst_rec_alias_t alias_; + dst_rec_signature_t signature_; + dst_rec_old_label_t old_label_; + dst_rec_scope_t scope_; + /* dst_typ_end_scope requires no additional fields */ + dst_rec_string_tab_t string_tab_; + /* dst_typ_global_name_tab is represented by 'string_tab' (above) */ + dst_rec_forward_t forward_; + dst_rec_aux_size_t aux_size_; + dst_rec_aux_align_t aux_align_; + dst_rec_aux_field_size_t aux_field_size_; + dst_rec_aux_field_off_t aux_field_off_; + dst_rec_aux_field_align_t aux_field_align_; + dst_rec_aux_qual_t aux_qual_; + dst_rec_aux_var_bound_t aux_var_bound_; + dst_rec_extension_t extension_; + dst_rec_string_t string_; + dst_rec_const_t const_; + /* dst_typ_reference is represented by 'pointer' (above) */ + dst_rec_record_t record_; + /* dst_typ_union is represented by 'record' (above) */ + dst_rec_aux_type_deriv_t aux_type_deriv_; + /* dst_typ_locpool is represented by 'string_tab' (above) */ + dst_rec_variable_t variable_; + dst_rec_label_t label_; + dst_rec_entry_t entry_; + dst_rec_aux_lifetime_t aux_lifetime_; + dst_rec_aux_ptr_base_t aux_ptr_base_; + dst_rec_aux_src_range_t aux_src_range_; + dst_rec_aux_reg_val_t aux_reg_val_; + dst_rec_name_tab_t aux_unit_names_; + dst_rec_sect_info_tab_t aux_sect_info_; + } + rec_data ALIGNED1; + } + dst_rec_t, *dst_rec_ptr_t; + + +/*===============================================*/ +/*========== .lines SECTION DEFINITIONS =========*/ +/*===============================================*/ +/* + The .lines section contains a sequence of line number tables. There is no + record structure within the section. The start of the table for a routine + is pointed to by the block record, and the end of the table is signaled by + an escape code. + + A line number table is a sequence of bytes. The default entry contains a line + number delta (-7..+7) in the high 4 bits and a pc delta (0..15) in the low 4 + bits. Special cases, including when one or both of the values is too large + to fit in 4 bits and other special cases are handled through escape entries. + Escape entries are identified by the value 0x8 in the high 4 bits. The low 4 + bits are occupied by a function code. Some escape entries are followed by + additional arguments, which may be bytes, words, or longwords. This data is + not aligned. + + The initial PC offset, file number and line number are zero. Normally, the + table begins with a dst_ln_file escape which establishes the initial file + and line number. All PC deltas are unsigned (thus the table is ordered by + increasing PC); line number deltas are signed. The table ends with a + dst_ln_end escape, which is followed by a final table entry whose PC delta + gives the code size of the last statement. + + Escape Semantic + --------- ------------------------------------------------------------ + file Changes file state. The current source file remains constant + until another file escape. Though the line number state is + also updated by a file escape, a file escape does NOT + constitute a line table entry. + + statement Alters the statement number of the next table entry. By + default, all table entries refer to the first statement on a + line. Statement number one is the second statement, and so on. + + entry Identifies the next table entry as the position of an entry + point for the current block. The PC position should follow + any procedure prologue code. An argument specifies the entry + number, which is keyed to the entry number of the corresponding + .symbols ENTRY record. + + exit Identifies the next table entry as the last position within + the current block before a procedure epiloge and subsequent + procedure exit. + + gap By default, the executable code corresponding to a table entry + is assumed to extend to the beginning of the next table entry. + If this is not the case--there is a "hole" in the table--then + a gap escape should follow the first table entry to specify + where the code for that entry ends. +*/ + +#define dst_ln_escape_flag -8 + +/* + Escape function codes: +*/ +typedef enum + { + dst_ln_pad, /* pad byte */ + dst_ln_file, /* file escape. Next 4 bytes are a dst_src_loc_t */ + dst_ln_dln1_dpc1, /* 1 byte line delta, 1 byte pc delta */ + dst_ln_dln2_dpc2, /* 2 bytes line delta, 2 bytes pc delta */ + dst_ln_ln4_pc4, /* 4 bytes ABSOLUTE line number, 4 bytes ABSOLUTE pc */ + dst_ln_dln1_dpc0, /* 1 byte line delta, pc delta = 0 */ + dst_ln_ln_off_1, /* statement escape, stmt # = 1 (2nd stmt on line) */ + dst_ln_ln_off, /* statement escape, stmt # = next byte */ + dst_ln_entry, /* entry escape, next byte is entry number */ + dst_ln_exit, /* exit escape */ + dst_ln_stmt_end, /* gap escape, 4 bytes pc delta */ + dst_ln_escape_11, /* reserved */ + dst_ln_escape_12, /* reserved */ + dst_ln_escape_13, /* reserved */ + dst_ln_nxt_byte, /* next byte contains the real escape code */ + dst_ln_end, /* end escape, final entry follows */ + dst_ln_escape_END_OF_ENUM + } + dst_ln_escape_t; + +/* + Line number table entry +*/ +typedef union + { + struct + { + unsigned int ln_delta : 4; /* 4 bit line number delta */ + unsigned int pc_delta : 4; /* 4 bit pc delta */ + } + delta; + + struct + { + unsigned int esc_flag : 4; /* alias for ln_delta */ + dst_ln_escape_t esc_code : 4; /* escape function code */ + } + esc; + + char sdata; /* signed data byte */ + unsigned char udata; /* unsigned data byte */ + } + dst_ln_entry_t, + *dst_ln_entry_ptr_t, + dst_ln_table_t[dst_dummy_array_size]; + +/* The following macro will extract the ln_delta field as a signed value: +*/ +#define dst_ln_ln_delta(ln_rec) \ + ( ((short) ((ln_rec).delta.ln_delta << 12)) >> 12 ) + + + + +typedef struct dst_sec_struct { + char *buffer; + long position; + long size; + long base; +} dst_sec; + + +/* Macros for access to the data */ + +#define DST_comp_unit(x) ((x)->rec_data.comp_unit_) +#define DST_section_tab(x) ((x)->rec_data.section_tab_) +#define DST_file_tab(x) ((x)->rec_data.file_tab_) +#define DST_block(x) ((x)->rec_data.block_) +#define DST_var(x) ((x)->rec_data.var_) +#define DST_pointer(x) ((x)->rec_data.pointer_) +#define DST_array(x) ((x)->rec_data.array_) +#define DST_subrange(x) ((x)->rec_data.subrange_) +#define DST_set(x) ((x)->rec_data.set_) +#define DST_implicit_enum(x) ((x)->rec_data.implicit_enum_) +#define DST_explicit_enum(x) ((x)->rec_data.explicit_enum_) +#define DST_short_rec(x) ((x)->rec_data.record_) +#define DST_short_union(x) ((x)->rec_data.record_) +#define DST_file(x) ((x)->rec_data.file_) +#define DST_offset(x) ((x)->rec_data.offset_) +#define DST_alias(x) ((x)->rec_data.alias_) +#define DST_signature(x) ((x)->rec_data.signature_) +#define DST_old_label(x) ((x)->rec_data.old_label_) +#define DST_scope(x) ((x)->rec_data.scope_) +#define DST_string_tab(x) ((x)->rec_data.string_tab_) +#define DST_global_name_tab(x) ((x)->rec_data.string_tab_) +#define DST_forward(x) ((x)->rec_data.forward_) +#define DST_aux_size(x) ((x)->rec_data.aux_size_) +#define DST_aux_align(x) ((x)->rec_data.aux_align_) +#define DST_aux_field_size(x) ((x)->rec_data.aux_field_size_) +#define DST_aux_field_off(x) ((x)->rec_data.aux_field_off_) +#define DST_aux_field_align(x) ((x)->rec_data.aux_field_align_) +#define DST_aux_qual(x) ((x)->rec_data.aux_qual_) +#define DST_aux_var_bound(x) ((x)->rec_data.aux_var_bound_) +#define DST_extension(x) ((x)->rec_data.extension_) +#define DST_string(x) ((x)->rec_data.string_) +#define DST_const(x) ((x)->rec_data.const_) +#define DST_reference(x) ((x)->rec_data.pointer_) +#define DST_record(x) ((x)->rec_data.record_) +#define DST_union(x) ((x)->rec_data.record_) +#define DST_aux_type_deriv(x) ((x)->rec_data.aux_type_deriv_) +#define DST_locpool(x) ((x)->rec_data.string_tab_) +#define DST_variable(x) ((x)->rec_data.variable_) +#define DST_label(x) ((x)->rec_data.label_) +#define DST_entry(x) ((x)->rec_data.entry_) +#define DST_aux_lifetime(x) ((x)->rec_data.aux_lifetime_) +#define DST_aux_ptr_base(x) ((x)->rec_data.aux_ptr_base_) +#define DST_aux_src_range(x) ((x)->rec_data.aux_src_range_) +#define DST_aux_reg_val(x) ((x)->rec_data.aux_reg_val_) +#define DST_aux_unit_names(x) ((x)->rec_data.aux_unit_names_) +#define DST_aux_sect_info(x) ((x)->rec_data.aux_sect_info_) + + +/* + * Type codes for loc strings. I'm not entirely certain about all of + * these, but they seem to work. + * troy@cbme.unsw.EDU.AU + * If you find a variable whose location can't be decoded, you should + * find out it's code using "dstdump -s filename". It will record an + * entry for the variable, and give a text representation of what + * the locstring means. Before that explaination there will be a + * number. In the LOCSTRING table, that number will appear before + * the start of the location string. Location string codes are + * five bit codes with a 3 bit argument. Check the high 5 bits of + * the one byte code, and figure out where it goes in here. + * Then figure out exactly what the meaning is and code it in + * dstread.c + * + * Note that ranged locs mean that the variable is in different locations + * depending on the current PC. We ignore these because (a) gcc can't handle + * them, and (b), If you don't use high levels of optimisation they won't + * occur. + */ +typedef enum +{ + dst_lsc_end, /* End of string */ + dst_lsc_indirect, /* Indirect through previous. Arg == 6 */ + /* Or register ax (x=arg) */ + dst_lsc_dreg, /* register dx (x=arg) */ + dst_lsc_03, + dst_lsc_section, /* Section (arg+1) */ + dst_lsc_05, + dst_lsc_06, + dst_lsc_add, /* Add (arg+1)*2 */ + dst_lsc_sub, /* Subtract (arg+1)*2 */ + dst_lsc_09, + dst_lsc_0a, + dst_lsc_sec_byte, /* Section of next byte+1 */ + dst_lsc_add_byte, /* Add next byte (arg == 5) or next word + * (arg == 6) + */ + dst_lsc_sub_byte, /* Subtract next byte. (arg == 1) or next + * word (arg == 6 ?) + */ + dst_lsc_sbreg, /* Stack base register (frame pointer). Arg==0*/ + dst_lsc_0f, + dst_lsc_ranged, /* location is pc dependent */ + dst_lsc_11, + dst_lsc_12, + dst_lsc_13, + dst_lsc_14, + dst_lsc_15, + dst_lsc_16, + dst_lsc_17, + dst_lsc_18, + dst_lsc_19, + dst_lsc_1a, + dst_lsc_1b, + dst_lsc_1c, + dst_lsc_1d, + dst_lsc_1e, + dst_lsc_1f +} dst_loc_string_code_t; + +/* If the following occurs after an addition/subtraction, that addition + * or subtraction should be multiplied by 256. It's a complete byte, not + * a code. + */ + +#define dst_multiply_256 ((char) 0x73) + +typedef struct +{ + char code : 5; + char arg : 3; +} dst_loc_header_t ALIGNED1; + +typedef union +{ + dst_loc_header_t header; + char data; +} dst_loc_entry_t ALIGNED1; + +#undef ALIGNED1 +#endif /* apollo_dst_h */ diff --git a/gdb/dstread.c b/gdb/dstread.c index e69de29bb2d..64b68c6a789 100644 --- a/gdb/dstread.c +++ b/gdb/dstread.c @@ -0,0 +1,1720 @@ +/* Read apollo DST symbol tables and convert to internal format, for GDB. + Contributed by Troy Rollo, University of NSW (troy@cbme.unsw.edu.au). + Copyright 1993 Free Software Foundation, Inc. + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "defs.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "breakpoint.h" +#include "bfd.h" +#include "symfile.h" +#include "objfiles.h" +#include "buildsym.h" +#include + +#include + +#include "dst.h" + +CORE_ADDR cur_src_start_addr, cur_src_end_addr; +dst_sec blocks_info, lines_info, symbols_info; + +/* Vector of line number information. */ + +static struct linetable *line_vector; + +/* Index of next entry to go in line_vector_index. */ + +static int line_vector_index; + +/* Last line number recorded in the line vector. */ + +static int prev_line_number; + +/* Number of elements allocated for line_vector currently. */ + +static int line_vector_length; + +struct pending_block *pending_blocks; + +static struct blockvector * +make_blockvector PARAMS ((struct objfile *)); + +static int +init_dst_sections PARAMS ((int)); + +static void +read_dst_symtab PARAMS ((struct objfile *)); + +static void +find_dst_sections PARAMS ((bfd *, sec_ptr, PTR)); + +static void +dst_symfile_init PARAMS ((struct objfile *)); + +static void +dst_new_init PARAMS ((struct objfile *)); + +static void +dst_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int)); + +static void +dst_symfile_finish PARAMS ((struct objfile *)); + +static void +record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type)); + +static void +dst_end_symtab PARAMS ((struct objfile *)); + +static void +complete_symtab PARAMS ((char *, CORE_ADDR, unsigned int)); + +static void +dst_start_symtab PARAMS ((void)); + +static void +dst_record_line PARAMS ((int, CORE_ADDR)); + +static struct blockvector * +make_blockvector (objfile) + struct objfile *objfile; +{ + register struct pending_block *next, *next1; + register struct blockvector *blockvector; + register int i; + + /* Count the length of the list of blocks. */ + + for (next = pending_blocks, i = 0; next; next = next->next, i++); + + blockvector = (struct blockvector *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector) + (i - 1) * sizeof (struct block *)); + + /* Copy the blocks into the blockvector. + This is done in reverse order, which happens to put + the blocks into the proper order (ascending starting address). + */ + + BLOCKVECTOR_NBLOCKS (blockvector) = i; + for (next = pending_blocks; next; next = next->next) + BLOCKVECTOR_BLOCK (blockvector, --i) = next->block; + + /* Now free the links of the list, and empty the list. */ + + for (next = pending_blocks; next; next = next1) + { + next1 = next->next; + free ((PTR)next); + } + pending_blocks = 0; + + return blockvector; +} + +/* Manage the vector of line numbers. */ +/* FIXME: Use record_line instead. */ + +static void +dst_record_line (line, pc) + int line; + CORE_ADDR pc; +{ + struct linetable_entry *e; + /* Make sure line vector is big enough. */ + + if (line_vector_index + 2 >= line_vector_length) + { + line_vector_length *= 2; + line_vector = (struct linetable *) + xrealloc ((char *) line_vector, sizeof (struct linetable) + + (line_vector_length + * sizeof (struct linetable_entry))); + } + + e = line_vector->item + line_vector_index++; + e->line = line; e->pc = pc; +} + +/* Start a new symtab for a new source file. + It indicates the start of data for one original source file. */ +/* FIXME: use start_symtab, like coffread.c now does. */ + +static void +dst_start_symtab () +{ + /* Initialize the source file line number information for this file. */ + + if (line_vector) /* Unlikely, but maybe possible? */ + free ((PTR)line_vector); + line_vector_index = 0; + line_vector_length = 1000; + prev_line_number = -2; /* Force first line number to be explicit */ + line_vector = (struct linetable *) + xmalloc (sizeof (struct linetable) + + line_vector_length * sizeof (struct linetable_entry)); +} + +/* Save the vital information from when starting to read a file, + for use when closing off the current file. + NAME is the file name the symbols came from, START_ADDR is the first + text address for the file, and SIZE is the number of bytes of text. */ + +static void +complete_symtab (name, start_addr, size) + char *name; + CORE_ADDR start_addr; + unsigned int size; +{ + last_source_file = savestring (name, strlen (name)); + cur_src_start_addr = start_addr; + cur_src_end_addr = start_addr + size; + + if (current_objfile -> ei.entry_point >= cur_src_start_addr && + current_objfile -> ei.entry_point < cur_src_end_addr) + { + current_objfile -> ei.entry_file_lowpc = cur_src_start_addr; + current_objfile -> ei.entry_file_highpc = cur_src_end_addr; + } +} + +/* Finish the symbol definitions for one main source file, + close off all the lexical contexts for that file + (creating struct block's for them), then make the + struct symtab for that file and put it in the list of all such. */ +/* FIXME: Use end_symtab, like coffread.c now does. */ + +static void +dst_end_symtab (objfile) + struct objfile *objfile; +{ + register struct symtab *symtab; + register struct blockvector *blockvector; + register struct linetable *lv; + + /* Create the blockvector that points to all the file's blocks. */ + + blockvector = make_blockvector (objfile); + + /* Now create the symtab object for this source file. */ + symtab = allocate_symtab (last_source_file, objfile); + + /* Fill in its components. */ + symtab->blockvector = blockvector; + symtab->free_code = free_linetable; + symtab->free_ptr = 0; + symtab->filename = last_source_file; + symtab->dirname = NULL; + lv = line_vector; + lv->nitems = line_vector_index; + symtab->linetable = (struct linetable *) + xrealloc ((char *) lv, (sizeof (struct linetable) + + lv->nitems * sizeof (struct linetable_entry))); + + free_named_symtabs (symtab->filename); + + /* Reinitialize for beginning of new file. */ + line_vector = 0; + line_vector_length = -1; + last_source_file = NULL; +} + +static void +record_minimal_symbol (name, address, type) + char *name; + CORE_ADDR address; + enum minimal_symbol_type type; +{ + prim_record_minimal_symbol (savestring (name, strlen (name)), + address, + type); +} + +/* dst_symfile_init () + is the dst-specific initialization routine for reading symbols. + + We will only be called if this is a DST or DST-like file. + BFD handles figuring out the format of the file, and code in symtab.c + uses BFD's determination to vector to us. + + The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */ + +static void +dst_symfile_init (objfile) + struct objfile *objfile; +{ + asection *section; + bfd *abfd = objfile->obfd; + + init_entry_point_info (objfile); + +} + +/* This function is called for every section; it finds the outer limits + of the line table (minimum and maximum file offset) so that the + mainline code can read the whole thing for efficiency. */ + +/* ARGSUSED */ +static void +find_dst_sections (abfd, asect, vpinfo) + bfd *abfd; + sec_ptr asect; + PTR vpinfo; +{ + int size, count; + long base; + file_ptr offset, maxoff; + dst_sec *section; + +/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ + size = asect->_raw_size; + offset = asect->filepos; + base = asect->vma; +/* End of warning */ + + section = NULL; + if (!strcmp(asect->name, ".blocks")) + section = &blocks_info; + else if (!strcmp(asect->name, ".lines")) + section = &lines_info; + else if (!strcmp(asect->name, ".symbols")) + section = &symbols_info; + if (!section) + return; + section->size = size; + section->position = offset; + section->base = base; +} + + +/* The BFD for this file -- only good while we're actively reading + symbols into a psymtab or a symtab. */ + +static bfd *symfile_bfd; + +/* Read a symbol file, after initialization by dst_symfile_init. */ +/* FIXME! Addr and Mainline are not used yet -- this will not work for + shared libraries or add_file! */ + +/* ARGSUSED */ +static void +dst_symfile_read (objfile, section_offsets, mainline) + struct objfile *objfile; + struct section_offsets *section_offsets; + int mainline; +{ + bfd *abfd = objfile->obfd; + char *name = bfd_get_filename (abfd); + int desc; + register int val; + int num_symbols; + int symtab_offset; + int stringtab_offset; + + symfile_bfd = abfd; /* Kludge for swap routines */ + +/* WARNING WILL ROBINSON! ACCESSING BFD-PRIVATE DATA HERE! FIXME! */ + desc = fileno ((FILE *)(abfd->iostream)); /* File descriptor */ + + /* Read the line number table, all at once. */ + bfd_map_over_sections (abfd, find_dst_sections, (PTR)NULL); + + val = init_dst_sections (desc); + if (val < 0) + error ("\"%s\": error reading debugging symbol tables\n", name); + + init_minimal_symbol_collection (); + make_cleanup (discard_minimal_symbols, 0); + + /* Now that the executable file is positioned at symbol table, + process it and define symbols accordingly. */ + + read_dst_symtab (objfile); + + /* Sort symbols alphabetically within each block. */ + + sort_all_symtab_syms (); + + /* Install any minimal symbols that have been collected as the current + minimal symbols for this objfile. */ + + install_minimal_symbols (objfile); +} + +static void +dst_new_init (ignore) + struct objfile *ignore; +{ + /* Nothin' to do */ +} + +/* Perform any local cleanups required when we are done with a particular + objfile. I.E, we are in the process of discarding all symbol information + for an objfile, freeing up all memory held for it, and unlinking the + objfile struct from the global list of known objfiles. */ + +static void +dst_symfile_finish (objfile) + struct objfile *objfile; +{ + /* Nothing to do */ +} + + +/* Get the next line number from the DST. Returns 0 when we hit an + * end directive or cannot continue for any other reason. + * + * Note that ordinary pc deltas are multiplied by two. Apparently + * this is what was really intended. + */ +static int +get_dst_line(buffer, pc) + signed char **buffer; + long *pc; +{ + static last_pc = 0; + static long last_line = 0; + static int last_file = 0; + dst_ln_entry_ptr_t entry; + int size; + dst_src_loc_t *src_loc; + + if (*pc != -1) + { + last_pc = *pc; + *pc = -1; + } + entry = (dst_ln_entry_ptr_t) *buffer; + + while (dst_ln_ln_delta(*entry) == dst_ln_escape_flag) + { + switch(entry->esc.esc_code) + { + case dst_ln_pad: + size = 1; /* pad byte */ + break; + case dst_ln_file: + /* file escape. Next 4 bytes are a dst_src_loc_t */ + size = 5; + src_loc = (dst_src_loc_t *) (*buffer + 1); + last_line = src_loc->line_number; + last_file = src_loc->file_index; + break; + case dst_ln_dln1_dpc1: + /* 1 byte line delta, 1 byte pc delta */ + last_line += (*buffer)[1]; + last_pc += 2 * (unsigned char) (*buffer)[2]; + dst_record_line(last_line, last_pc); + size = 3; + break; + case dst_ln_dln2_dpc2: + /* 2 bytes line delta, 2 bytes pc delta */ + last_line += *(short *) (*buffer + 1); + last_pc += 2 * (*(short *) (*buffer + 3)); + size = 5; + dst_record_line(last_line, last_pc); + break; + case dst_ln_ln4_pc4: + /* 4 bytes ABSOLUTE line number, 4 bytes ABSOLUTE pc */ + last_line = *(unsigned long *) (*buffer + 1); + last_pc = *(unsigned long *) (*buffer + 5); + size = 9; + dst_record_line(last_line, last_pc); + break; + case dst_ln_dln1_dpc0: + /* 1 byte line delta, pc delta = 0 */ + size = 2; + last_line+= (*buffer)[1]; + break; + case dst_ln_ln_off_1: + /* statement escape, stmt # = 1 (2nd stmt on line) */ + size = 1; + break; + case dst_ln_ln_off: + /* statement escape, stmt # = next byte */ + size = 2; + break; + case dst_ln_entry: + /* entry escape, next byte is entry number */ + size = 2; + break; + case dst_ln_exit: + /* exit escape */ + size = 1; + break; + case dst_ln_stmt_end: + /* gap escape, 4 bytes pc delta */ + size = 5; + /* last_pc += 2 * (*(long *) (*buffer + 1)); */ + /* Apparently this isn't supposed to actually modify + * the pc value. Totally weird. + */ + break; + case dst_ln_escape_11: + case dst_ln_escape_12: + case dst_ln_escape_13: + size = 1; + break; + case dst_ln_nxt_byte: + /* This shouldn't happen. If it does, we're SOL */ + return 0; + break; + case dst_ln_end: + /* end escape, final entry follows */ + return 0; + } + *buffer += (size < 0) ? -size : size; + entry = (dst_ln_entry_ptr_t) *buffer; + } + last_line += dst_ln_ln_delta(*entry); + last_pc += entry->delta.pc_delta * 2; + (*buffer)++; + dst_record_line(last_line, last_pc); + return 1; +} + +static void +enter_all_lines(buffer, address) + char *buffer; + long address; +{ + if (buffer) + while (get_dst_line(&buffer, &address)); +} + +static int +get_dst_entry(buffer, ret_entry) + char *buffer; + dst_rec_ptr_t *ret_entry; +{ + int size; + dst_rec_ptr_t entry; + static int last_type; + int ar_size; + static unsigned lu3; + + entry = (dst_rec_ptr_t) buffer; + switch(entry->rec_type) + { + case dst_typ_pad: + size = 0; + break; + case dst_typ_comp_unit: + size = sizeof(DST_comp_unit(entry)); + break; + case dst_typ_section_tab: + size = sizeof(DST_section_tab(entry)) + + ((int) DST_section_tab(entry).number_of_sections + - dst_dummy_array_size) * sizeof(long); + break; + case dst_typ_file_tab: + size = sizeof(DST_file_tab(entry)) + + ((int) DST_file_tab(entry).number_of_files + - dst_dummy_array_size) * sizeof(dst_file_desc_t); + break; + case dst_typ_block: + size = sizeof(DST_block(entry)) + + ((int) DST_block(entry).n_of_code_ranges + - dst_dummy_array_size) * sizeof(dst_code_range_t); + break; + case dst_typ_5: + size = -1; + break; + case dst_typ_var: + size = sizeof(DST_var(entry)) - + sizeof(dst_var_loc_long_t) * dst_dummy_array_size + + DST_var(entry).no_of_locs * + ( DST_var(entry).short_locs ? + sizeof(dst_var_loc_short_t): + sizeof(dst_var_loc_long_t)); + break; + case dst_typ_pointer: + size = sizeof(DST_pointer(entry)); + break; + case dst_typ_array: + size = sizeof(DST_array(entry)); + break; + case dst_typ_subrange: + size = sizeof(DST_subrange(entry)); + break; + case dst_typ_set: + size = sizeof(DST_set(entry)); + break; + case dst_typ_implicit_enum: + size = sizeof(DST_implicit_enum(entry)) + + ((int) DST_implicit_enum(entry).nelems + - dst_dummy_array_size) * sizeof(dst_rel_offset_t); + break; + case dst_typ_explicit_enum: + size = sizeof(DST_explicit_enum(entry)) + + ((int) DST_explicit_enum(entry).nelems + - dst_dummy_array_size) * sizeof(dst_enum_elem_t); + break; + case dst_typ_short_rec: + size = sizeof(DST_short_rec(entry)) + + DST_short_rec(entry).nfields * sizeof(dst_short_field_t) + - dst_dummy_array_size * sizeof(dst_field_t); + break; + case dst_typ_short_union: + size = sizeof(DST_short_union(entry)) + + DST_short_union(entry).nfields * sizeof(dst_short_field_t) + - dst_dummy_array_size * sizeof(dst_field_t); + break; + case dst_typ_file: + size = sizeof(DST_file(entry)); + break; + case dst_typ_offset: + size = sizeof(DST_offset(entry)); + break; + case dst_typ_alias: + size = sizeof(DST_alias(entry)); + break; + case dst_typ_signature: + size = sizeof(DST_signature(entry)) + + ((int) DST_signature(entry).nargs - + dst_dummy_array_size) * sizeof(dst_arg_t); + break; + case dst_typ_21: + size = -1; + break; + case dst_typ_old_label: + size = sizeof(DST_old_label(entry)); + break; + case dst_typ_scope: + size = sizeof(DST_scope(entry)); + break; + case dst_typ_end_scope: + size = 0; + break; + case dst_typ_25: + case dst_typ_26: + size = -1; + break; + case dst_typ_string_tab: + case dst_typ_global_name_tab: + size = sizeof(DST_string_tab(entry)) + + DST_string_tab(entry).length + - dst_dummy_array_size; + break; + case dst_typ_forward: + size = sizeof(DST_forward(entry)); + get_dst_entry((char *) entry + DST_forward(entry).rec_off, &entry); + break; + case dst_typ_aux_size: + size = sizeof(DST_aux_size(entry)); + break; + case dst_typ_aux_align: + size = sizeof(DST_aux_align(entry)); + break; + case dst_typ_aux_field_size: + size = sizeof(DST_aux_field_size(entry)); + break; + case dst_typ_aux_field_off: + size = sizeof(DST_aux_field_off(entry)); + break; + case dst_typ_aux_field_align: + size = sizeof(DST_aux_field_align(entry)); + break; + case dst_typ_aux_qual: + size = sizeof(DST_aux_qual(entry)); + break; + case dst_typ_aux_var_bound: + size = sizeof(DST_aux_var_bound(entry)); + break; + case dst_typ_extension: + size = DST_extension(entry).rec_size; + break; + case dst_typ_string: + size = sizeof(DST_string(entry)); + break; + case dst_typ_old_entry: + size = 48; /* Obsolete entry type */ + break; + case dst_typ_const: + size = sizeof(DST_const(entry)) + + DST_const(entry).value.length + - sizeof(DST_const(entry).value.val); + break; + case dst_typ_reference: + size = sizeof(DST_reference(entry)); + break; + case dst_typ_old_record: + case dst_typ_old_union: + case dst_typ_record: + case dst_typ_union: + size = sizeof(DST_record(entry)) + + ((int) DST_record(entry).nfields + - dst_dummy_array_size) * sizeof(dst_field_t); + break; + case dst_typ_aux_type_deriv: + size = sizeof(DST_aux_type_deriv(entry)); + break; + case dst_typ_locpool: + size = sizeof(DST_locpool(entry)) + + ((int) DST_locpool(entry).length - + dst_dummy_array_size); + break; + case dst_typ_variable: + size = sizeof(DST_variable(entry)); + break; + case dst_typ_label: + size = sizeof(DST_label(entry)); + break; + case dst_typ_entry: + size = sizeof(DST_entry(entry)); + break; + case dst_typ_aux_lifetime: + size = sizeof(DST_aux_lifetime(entry)); + break; + case dst_typ_aux_ptr_base: + size = sizeof(DST_aux_ptr_base(entry)); + break; + case dst_typ_aux_src_range: + size = sizeof(DST_aux_src_range(entry)); + break; + case dst_typ_aux_reg_val: + size = sizeof(DST_aux_reg_val(entry)); + break; + case dst_typ_aux_unit_names: + size = sizeof(DST_aux_unit_names(entry)) + + ((int) DST_aux_unit_names(entry).number_of_names + - dst_dummy_array_size) * sizeof(dst_rel_offset_t); + break; + case dst_typ_aux_sect_info: + size = sizeof(DST_aux_sect_info(entry)) + + ((int) DST_aux_sect_info(entry).number_of_refs + - dst_dummy_array_size) * sizeof(dst_sect_ref_t); + break; + default: + size = -1; + break; + } + if (size == -1) + { + fprintf(stderr, "Warning: unexpected DST entry type (%d) found\nLast valid entry was of type: %d\n", + (int) entry->rec_type, + last_type); + fprintf(stderr, "Last unknown_3 value: %d\n", lu3); + size = 0; + } + else + last_type = entry->rec_type; + if (size & 1) /* Align on a word boundary */ + size++; + size += 2; + *ret_entry = entry; + return size; +} + +static int next_dst_entry(buffer, entry, table) + char **buffer; + dst_rec_ptr_t *entry; + dst_sec *table; +{ + if (*buffer - table->buffer >= table->size) + { + *entry = NULL; + return 0; + } + *buffer += get_dst_entry(*buffer, entry); + return 1; +} + +#define NEXT_BLK(a, b) next_dst_entry(a, b, &blocks_info) +#define NEXT_SYM(a, b) next_dst_entry(a, b, &symbols_info) +#define DST_OFFSET(a, b) ((char *) (a) + (b)) + +static dst_rec_ptr_t section_table = NULL; + +char * +get_sec_ref(ref) + dst_sect_ref_t *ref; +{ + dst_sec *section = NULL; + long offset; + + if (!section_table || !ref->sect_index) + return NULL; + offset = DST_section_tab(section_table).section_base[ref->sect_index-1] + + ref->sect_offset; + if (offset >= blocks_info.base && + offset < blocks_info.base + blocks_info.size) + section = &blocks_info; + else if (offset >= symbols_info.base && + offset < symbols_info.base + symbols_info.size) + section = &symbols_info; + else if (offset >= lines_info.base && + offset < lines_info.base + lines_info.size) + section = &lines_info; + if (!section) + return NULL; + return section->buffer + (offset - section->base); +} + +CORE_ADDR +dst_get_addr(int section, long offset) +{ + if (!section_table || !section) + return 0; + return DST_section_tab(section_table).section_base[section-1] + offset; +} + +CORE_ADDR +dst_sym_addr(ref) + dst_sect_ref_t *ref; +{ + if (!section_table || !ref->sect_index) + return 0; + return DST_section_tab(section_table).section_base[ref->sect_index-1] + + ref->sect_offset; +} + +static struct type * +create_new_type(objfile) + struct objfile *objfile; +{ + struct type *type; + + type = (struct type *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct type)); + memset(type, 0, sizeof(struct type)); + return type; +} + +static struct symbol * +create_new_symbol(objfile, name) + struct objfile *objfile; + char *name; +{ + struct symbol *sym = (struct symbol *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); + memset (sym, 0, sizeof (struct symbol)); + SYMBOL_NAME (sym) = obstack_copy0 (&objfile->symbol_obstack, + name, strlen (name)); + SYMBOL_VALUE (sym) = 0; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + + SYMBOL_CLASS (sym) = LOC_BLOCK; + return sym; +}; + +static struct type * +decode_dst_type PARAMS ((struct objfile *, dst_rec_ptr_t)); + +static struct type * +decode_type_desc(objfile, type_desc, base) + struct objfile *objfile; + dst_type_t *type_desc; + dst_rec_ptr_t base; +{ + struct type *type; + dst_rec_ptr_t entry; + if (type_desc->std_type.user_defined_type) + { + entry = (dst_rec_ptr_t) DST_OFFSET(base, + dst_user_type_offset(*type_desc)); + type = decode_dst_type(objfile, entry); + } + else + { + switch(type_desc->std_type.dtc) + { + case dst_int8_type: + type = builtin_type_signed_char; + break; + case dst_int16_type: + type = builtin_type_short; + break; + case dst_int32_type: + type = builtin_type_long; + break; + case dst_uint8_type: + type = builtin_type_unsigned_char; + break; + case dst_uint16_type: + type = builtin_type_unsigned_short; + break; + case dst_uint32_type: + type = builtin_type_unsigned_long; + break; + case dst_real32_type: + type = builtin_type_float; + break; + case dst_real64_type: + type = builtin_type_double; + break; + case dst_complex_type: + type = builtin_type_complex; + break; + case dst_dcomplex_type: + type = builtin_type_double_complex; + break; + case dst_bool8_type: + type = builtin_type_char; + break; + case dst_bool16_type: + type = builtin_type_short; + break; + case dst_bool32_type: + type = builtin_type_long; + break; + case dst_char_type: + type = builtin_type_char; + break; + /* The next few are more complex. I will take care + * of them properly at a later point. + */ + case dst_string_type: + type = builtin_type_void; + break; + case dst_ptr_type: + type = builtin_type_void; + break; + case dst_set_type: + type = builtin_type_void; + break; + case dst_proc_type: + type = builtin_type_void; + break; + case dst_func_type: + type = builtin_type_void; + break; + /* Back tto some ordinary ones */ + case dst_void_type: + type = builtin_type_void; + break; + case dst_uchar_type: + type = builtin_type_unsigned_char; + break; + default: + type = builtin_type_void; + break; + } + } + return type; +} + +struct structure_list + { + struct structure_list *next; + struct type *type; + }; + +static struct structure_list *struct_list = NULL; + +static struct type * +find_dst_structure(name) + char *name; +{ + struct structure_list *element; + + for (element = struct_list; element; element = element->next) + if (!strcmp(name, TYPE_NAME(element->type))) + return element->type; + return NULL; +} + + +static struct type * +decode_dst_structure(objfile, entry, code, version) + struct objfile *objfile; + dst_rec_ptr_t entry; + int code; + int version; +{ + struct type *type, *child_type; + char *struct_name; + char *name, *field_name; + int i; + int fieldoffset, fieldsize; + dst_type_t type_desc; + struct structure_list *element; + + struct_name = DST_OFFSET(entry, DST_record(entry).noffset); + name = concat( (code == TYPE_CODE_UNION)?"union ":"struct ", + struct_name, NULL); + type = find_dst_structure(name); + if (type) + { + free((PTR) name); + return type; + } + type = create_new_type(objfile); + TYPE_NAME(type) = obstack_copy0 (&objfile->symbol_obstack, + name, strlen(name)); + free((PTR) name); + TYPE_CODE(type) = code; + TYPE_LENGTH(type) = DST_record(entry).size; + TYPE_NFIELDS(type) = DST_record(entry).nfields; + TYPE_FIELDS(type) = (struct field *) + obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * + DST_record(entry).nfields); + fieldoffset = fieldsize = 0; + INIT_CPLUS_SPECIFIC(type); + element = (struct structure_list *) + xmalloc(sizeof(struct structure_list)); + element->type = type; + element->next = struct_list; + struct_list = element; + for (i = 0; i < DST_record(entry).nfields; i++) + { + switch (version) + { + case 2: + field_name = DST_OFFSET(entry, + DST_record(entry).f.ofields[i].noffset); + fieldoffset = DST_record(entry).f.ofields[i].foffset*8 + + DST_record(entry).f.ofields[i].bit_offset; + fieldsize = DST_record(entry).f.ofields[i].size; + type_desc = DST_record(entry).f.ofields[i].type_desc; + break; + case 1: + field_name = DST_OFFSET(entry, + DST_record(entry).f.fields[i].noffset); + type_desc = DST_record(entry).f.fields[i].type_desc; + switch(DST_record(entry).f.fields[i].f.field_loc.format_tag) + { + case dst_field_byte: + fieldoffset = DST_record(entry).f. + fields[i].f.field_byte.offset * 8; + fieldsize = -1; + break; + case dst_field_bit: + fieldoffset = DST_record(entry).f. + fields[i].f.field_bit.byte_offset * 8 + + DST_record(entry).f. + fields[i].f.field_bit.bit_offset; + fieldsize = DST_record(entry).f. + fields[i].f.field_bit.nbits; + break; + case dst_field_loc: + fieldoffset += fieldsize; + fieldsize = -1; + break; + } + break; + case 0: + field_name = DST_OFFSET(entry, + DST_record(entry).f.sfields[i].noffset); + fieldoffset = DST_record(entry).f.sfields[i].foffset; + type_desc = DST_record(entry).f.sfields[i].type_desc; + if (i < DST_record(entry).nfields - 1) + fieldsize = DST_record(entry).f.sfields[i+1].foffset; + else + fieldsize = DST_record(entry).size; + fieldsize -= fieldoffset; + fieldoffset *= 8; + fieldsize *= 8; + } + TYPE_FIELDS(type)[i].name = + obstack_copy0 (&objfile->symbol_obstack, + field_name, strlen(field_name)); + TYPE_FIELDS(type)[i].type = decode_type_desc(objfile, + &type_desc, + entry); + if (fieldsize == -1) + fieldsize = TYPE_LENGTH(TYPE_FIELDS(type)[i].type) * + 8; + TYPE_FIELDS(type)[i].bitsize = fieldsize; + TYPE_FIELDS(type)[i].bitpos = fieldoffset; + } + return type; +} + +static struct type * +decode_dst_type(objfile, entry) + struct objfile *objfile; + dst_rec_ptr_t entry; +{ + struct type *child_type, *type, *range_type, *index_type; + + switch(entry->rec_type) + { + case dst_typ_var: + return decode_type_desc(objfile, + &DST_var(entry).type_desc, + entry); + break; + case dst_typ_variable: + return decode_type_desc(objfile, + &DST_variable(entry).type_desc, + entry); + break; + case dst_typ_short_rec: + return decode_dst_structure(objfile, entry, TYPE_CODE_STRUCT,0); + case dst_typ_short_union: + return decode_dst_structure(objfile, entry, TYPE_CODE_UNION, 0); + case dst_typ_union: + return decode_dst_structure(objfile, entry, TYPE_CODE_UNION, 1); + case dst_typ_record: + return decode_dst_structure(objfile, entry, TYPE_CODE_STRUCT,1); + case dst_typ_old_union: + return decode_dst_structure(objfile, entry, TYPE_CODE_UNION, 2); + case dst_typ_old_record: + return decode_dst_structure(objfile, entry, TYPE_CODE_STRUCT,2); + case dst_typ_pointer: + return make_pointer_type( + decode_type_desc(objfile, + &DST_pointer(entry).type_desc, + entry), + NULL); + case dst_typ_array: + child_type = decode_type_desc(objfile, + &DST_pointer(entry).type_desc, + entry); + index_type = lookup_fundamental_type(objfile, + FT_INTEGER); + range_type = create_range_type ((struct type *) NULL, + index_type, DST_array(entry).lo_bound, + DST_array(entry).hi_bound); + return create_array_type ((struct type *) NULL, child_type, + range_type); + case dst_typ_alias: + return decode_type_desc(objfile, + &DST_alias(entry).type_desc, + entry); + default: + return builtin_type_int; + } +} + +struct symbol_list { + struct symbol_list *next; + struct symbol *symbol; +}; + +static struct symbol_list *dst_global_symbols = NULL; +static int total_globals = 0; + +static void +decode_dst_locstring(locstr, sym) + char *locstr; + struct symbol *sym; +{ + dst_loc_entry_t *entry, *next_entry; + CORE_ADDR temp; + int count = 0; + + while(1) + { + if (count++ == 100) + { + fprintf(stderr, "Error reading locstring\n"); + break; + } + entry = (dst_loc_entry_t *) locstr; + next_entry = (dst_loc_entry_t *) (locstr + 1); + switch (entry->header.code) + { + case dst_lsc_end: /* End of string */ + return; + case dst_lsc_indirect:/* Indirect through previous. Arg == 6 */ + /* Or register ax x == arg */ + if (entry->header.arg < 6) + { + SYMBOL_CLASS(sym) = LOC_REGISTER; + SYMBOL_VALUE(sym) = entry->header.arg + 8; + } + /* We predict indirects */ + locstr++; + break; + case dst_lsc_dreg: + SYMBOL_CLASS(sym) = LOC_REGISTER; + SYMBOL_VALUE(sym) = entry->header.arg; + locstr++; + break; + case dst_lsc_section:/* Section (arg+1) */ + SYMBOL_VALUE(sym) = dst_get_addr(entry->header.arg+1, 0); + locstr++; + break; + case dst_lsc_sec_byte: /* Section (next_byte+1) */ + SYMBOL_VALUE(sym) = dst_get_addr(locstr[1]+1, 0); + locstr+=2; + break; + case dst_lsc_add: /* Add (arg+1)*2 */ + case dst_lsc_sub: /* Subtract (arg+1)*2 */ + temp = (entry->header.arg + 1) * 2; + locstr++; + if (*locstr == dst_multiply_256) + { + temp <<= 8; + locstr++; + } + switch(entry->header.code) + { + case dst_lsc_add: + if (SYMBOL_CLASS(sym) == LOC_LOCAL) + SYMBOL_CLASS(sym) = LOC_ARG; + SYMBOL_VALUE(sym) += temp; + break; + case dst_lsc_sub: + SYMBOL_VALUE(sym) -= temp; + break; + } + break; + case dst_lsc_add_byte: + case dst_lsc_sub_byte: + switch (entry->header.arg & 0x03) + { + case 1: + temp = (unsigned char) locstr[1]; + locstr += 2; + break; + case 2: + temp = * (unsigned short *) (locstr + 1); + locstr += 3; + break; + case 3: + temp = * (unsigned long *) (locstr + 1); + locstr += 5; + break; + } + if (*locstr == dst_multiply_256) + { + temp <<= 8; + locstr++; + } + switch(entry->header.code) + { + case dst_lsc_add_byte: + if (SYMBOL_CLASS(sym) == LOC_LOCAL) + SYMBOL_CLASS(sym) = LOC_ARG; + SYMBOL_VALUE(sym) += temp; + break; + case dst_lsc_sub_byte: + SYMBOL_VALUE(sym) -= temp; + break; + } + break; + case dst_lsc_sbreg: /* Stack base register (frame pointer). Arg==0*/ + if (next_entry->header.code != dst_lsc_indirect) + { + SYMBOL_VALUE(sym) = 0; + SYMBOL_CLASS(sym) = LOC_STATIC; + return; + } + SYMBOL_VALUE(sym) = 0; + SYMBOL_CLASS(sym) = LOC_LOCAL; + locstr++; + break; + default: + SYMBOL_VALUE(sym) = 0; + SYMBOL_CLASS(sym) = LOC_STATIC; + return; + } + } +} + +static struct symbol_list * +process_dst_symbols(objfile, entry, name, nsyms_ret) + struct objfile *objfile; + dst_rec_ptr_t entry; + char *name; + int *nsyms_ret; +{ + struct symbol_list *list = NULL, *element; + struct symbol *sym; + char *symname; + int nsyms = 0; + char *location; + long line; + dst_type_t symtype; + struct type *type; + dst_var_attr_t attr; + dst_var_loc_t loc_type; + unsigned loc_index; + long loc_value; + + if (!entry) + { + *nsyms_ret = 0; + return NULL; + } + location = (char *) entry; + while (NEXT_SYM(&location, &entry) && + entry->rec_type != dst_typ_end_scope) + { + if (entry->rec_type == dst_typ_var) + { + if (DST_var(entry).short_locs) + { + loc_type = DST_var(entry).locs.shorts[0].loc_type; + loc_index = DST_var(entry).locs.shorts[0].loc_index; + loc_value = DST_var(entry).locs.shorts[0].location; + } + else + { + loc_type = DST_var(entry).locs.longs[0].loc_type; + loc_index = DST_var(entry).locs.longs[0].loc_index; + loc_value = DST_var(entry).locs.longs[0].location; + } + if (loc_type == dst_var_loc_external) + continue; + symname = DST_OFFSET(entry, DST_var(entry).noffset); + line = DST_var(entry).src_loc.line_number; + symtype = DST_var(entry).type_desc; + attr = DST_var(entry).attributes; + } + else if (entry->rec_type == dst_typ_variable) + { + symname = DST_OFFSET(entry, + DST_variable(entry).noffset); + line = DST_variable(entry).src_loc.line_number; + symtype = DST_variable(entry).type_desc; + attr = DST_variable(entry).attributes; + } + else + { + continue; + } + if (symname && name && !strcmp(symname, name)) + /* It's the function return value */ + continue; + sym = create_new_symbol(objfile, symname); + + if ((attr & (1<rec_type) + { + case dst_typ_var: + switch(loc_type) + { + case dst_var_loc_abs: + SYMBOL_VALUE_ADDRESS(sym) = loc_value; + break; + case dst_var_loc_sect_off: + case dst_var_loc_ind_sect_off: /* What is this? */ + SYMBOL_VALUE_ADDRESS(sym) = dst_get_addr( + loc_index, + loc_value); + break; + case dst_var_loc_ind_reg_rel: /* What is this? */ + case dst_var_loc_reg_rel: + /* If it isn't fp relative, specify the + * register it's relative to. + */ + if (loc_index) + { + sym->aux_value.basereg = loc_index; + } + SYMBOL_VALUE(sym) = loc_value; + if (loc_value > 0 && + SYMBOL_CLASS(sym) == LOC_BASEREG) + SYMBOL_CLASS(sym) = LOC_BASEREG_ARG; + break; + case dst_var_loc_reg: + SYMBOL_VALUE(sym) = loc_index; + SYMBOL_CLASS(sym) = LOC_REGISTER; + break; + } + break; + case dst_typ_variable: + /* External variable..... don't try to interpret + * its nonexistant locstring. + */ + if (DST_variable(entry).loffset == -1) + continue; + decode_dst_locstring(DST_OFFSET(entry, + DST_variable(entry).loffset), + sym); + } + element = (struct symbol_list *) + xmalloc(sizeof(struct symbol_list)); + + if (attr & (1<next = dst_global_symbols; + dst_global_symbols = element; + total_globals++; + } + else + { + element->next = list; + list = element; + nsyms++; + } + element->symbol = sym; + } + *nsyms_ret = nsyms; + return list; +} + + +static struct symbol * +process_dst_function(objfile, entry, name, address) + struct objfile *objfile; + dst_rec_ptr_t entry; + char *name; + CORE_ADDR address; +{ + struct symbol *sym; + struct type *type, *ftype; + dst_rec_ptr_t sym_entry, typ_entry; + char *location; + struct symbol_list *element; + + type = builtin_type_int; + sym = create_new_symbol(objfile, name); + SYMBOL_CLASS(sym) = LOC_BLOCK; + + if (entry) + { + location = (char *) entry; + do + { + NEXT_SYM(&location, &sym_entry); + } while (sym_entry && sym_entry->rec_type != dst_typ_signature); + + if (sym_entry) + { + SYMBOL_LINE(sym) = + DST_signature(sym_entry).src_loc.line_number; + if (DST_signature(sym_entry).result) + { + typ_entry = (dst_rec_ptr_t) + DST_OFFSET(sym_entry, + DST_signature(sym_entry).result); + type = decode_dst_type(objfile, typ_entry); + } + } + } + + if (!type->function_type) + { + ftype = create_new_type(objfile); + type->function_type = ftype; + ftype->target_type = type; + ftype->code = TYPE_CODE_FUNC; + } + SYMBOL_TYPE(sym) = type->function_type; + + /* Now add ourselves to the global symbols list */ + element = (struct symbol_list *) + xmalloc(sizeof(struct symbol_list)); + + element->next = dst_global_symbols; + dst_global_symbols = element; + total_globals++; + element->symbol = sym; + + return sym; +} + +static struct block * +process_dst_block(objfile, entry) + struct objfile *objfile; + dst_rec_ptr_t entry; +{ + struct block *block; + struct symbol *function = NULL; + CORE_ADDR address; + long size; + char *name; + dst_rec_ptr_t child_entry, symbol_entry; + struct block *child_block; + int total_symbols = 0; + struct pending_block *pblock; + char fake_name[20]; + static long fake_seq = 0; + struct symbol_list *symlist, *nextsym; + int symnum; + + if (DST_block(entry).noffset) + name = DST_OFFSET(entry, DST_block(entry).noffset); + else + name = NULL; + if (DST_block(entry).n_of_code_ranges) + { + address = dst_sym_addr( + &DST_block(entry).code_ranges[0].code_start); + size = DST_block(entry).code_ranges[0].code_size; + } + else + { + address = -1; + size = 0; + } + symbol_entry = (dst_rec_ptr_t) get_sec_ref(&DST_block(entry).symbols_start); + switch(DST_block(entry).block_type) + { + /* These are all really functions. Even the "program" type. + * This is because the Apollo OS was written in Pascal, and + * in Pascal, the main procedure is described as the Program. + * Cute, huh? + */ + case dst_block_procedure: + case dst_block_function: + case dst_block_subroutine: + case dst_block_program: + record_minimal_symbol(name, address, mst_text); + function = process_dst_function( + objfile, + symbol_entry, + name, + address); + enter_all_lines(get_sec_ref(&DST_block(entry).code_ranges[0].lines_start), address); + break; + case dst_block_block_data: + break; + + default: + /* GDB has to call it something, and the module name + * won't cut it + */ + sprintf(fake_name, "block_%08lx", fake_seq++); + function = process_dst_function( + objfile, NULL, fake_name, address); + break; + } + symlist = process_dst_symbols(objfile, symbol_entry, + name, &total_symbols); + block = (struct block *) + obstack_alloc (&objfile->symbol_obstack, + sizeof (struct block) + + (total_symbols - 1) * sizeof (struct symbol *)); + + symnum = 0; + while (symlist) + { + nextsym = symlist->next; + + block->sym[symnum] = symlist->symbol; + + free((PTR) symlist); + symlist = nextsym; + symnum++; + } + BLOCK_NSYMS (block) = total_symbols; + BLOCK_START (block) = address; + BLOCK_END (block) = address + size; + BLOCK_SUPERBLOCK (block) = 0; + if (function) + { + SYMBOL_BLOCK_VALUE (function) = block; + BLOCK_FUNCTION (block) = function; + } + else + BLOCK_FUNCTION (block) = 0; + + pblock = (struct pending_block *) + xmalloc (sizeof (struct pending_block)); + pblock->block = block; + pblock->next = pending_blocks; + pending_blocks = pblock; + if (DST_block(entry).child_block_off) + { + child_entry = (dst_rec_ptr_t) DST_OFFSET(entry, + DST_block(entry).child_block_off); + while (child_entry) + { + child_block = process_dst_block(objfile, child_entry); + if (child_block) + { + if (BLOCK_START(child_block) < + BLOCK_START(block) || + BLOCK_START(block) == -1) + BLOCK_START(block) = + BLOCK_START(child_block); + if (BLOCK_END(child_block) > + BLOCK_END(block) || + BLOCK_END(block) == -1) + BLOCK_END(block) = + BLOCK_END(child_block); + BLOCK_SUPERBLOCK (child_block) = block; + } + if (DST_block(child_entry).sibling_block_off) + child_entry = (dst_rec_ptr_t) DST_OFFSET( + child_entry, + DST_block(child_entry).sibling_block_off); + else + child_entry = NULL; + } + } + return block; +} + + +static void +read_dst_symtab (objfile) + struct objfile *objfile; +{ + char *buffer; + dst_rec_ptr_t entry, file_table, root_block; + char *source_file; + struct block *block, *global_block; + struct pending_block *pblock; + int symnum; + struct symbol_list *nextsym; + int module_num = 0; + struct structure_list *element; + + current_objfile = objfile; + buffer = blocks_info.buffer; + while (NEXT_BLK(&buffer, &entry)) + { + if (entry->rec_type == dst_typ_comp_unit) + { + file_table = (dst_rec_ptr_t) DST_OFFSET(entry, + DST_comp_unit(entry).file_table); + section_table = (dst_rec_ptr_t) DST_OFFSET(entry, + DST_comp_unit(entry).section_table); + root_block = (dst_rec_ptr_t) DST_OFFSET(entry, + DST_comp_unit(entry).root_block_offset); + source_file = DST_OFFSET(file_table, + DST_file_tab(file_table).files[0].noffset); + /* Point buffer to the start of the next comp_unit */ + buffer = DST_OFFSET(entry, + DST_comp_unit(entry).data_size); + dst_start_symtab(); + + pblock = (struct pending_block *) + xmalloc (sizeof (struct pending_block)); + pblock->next = NULL; + pending_blocks = pblock; + + block = process_dst_block(objfile, root_block); + + global_block = (struct block *) + obstack_alloc (&objfile->symbol_obstack, + sizeof (struct block) + + (total_globals - 1) * + sizeof (struct symbol *)); + BLOCK_NSYMS(global_block) = total_globals; + for (symnum = 0; symnum < total_globals; symnum++) + { + nextsym = dst_global_symbols->next; + + global_block->sym[symnum] = + dst_global_symbols->symbol; + + free((PTR) dst_global_symbols); + dst_global_symbols = nextsym; + } + dst_global_symbols = NULL; + total_globals = 0; + BLOCK_FUNCTION(global_block) = 0; + BLOCK_START(global_block) = BLOCK_START(block); + BLOCK_END(global_block) = BLOCK_END(block); + BLOCK_SUPERBLOCK(global_block) = 0; + BLOCK_SUPERBLOCK(block) = global_block; + pblock->block = global_block; + + complete_symtab(source_file, + BLOCK_START(block), + BLOCK_END(block) - BLOCK_START(block)); + module_num++; + dst_end_symtab(objfile); + } + } + if (module_num) + record_minimal_symbol("", + BLOCK_END(block), mst_text); + /* One more faked symbol to make sure nothing can ever run off the + * end of the symbol table. This one represents the end of the + * text space. It used to be (CORE_ADDR) -1 (effectively the highest + * int possible), but some parts of gdb treated it as a signed + * number and failed comparisons. We could equally use 7fffffff, + * but no functions are ever mapped to an address higher than + * 40000000 + */ + record_minimal_symbol("", + (CORE_ADDR) 0x40000000, + mst_text); + while (struct_list) + { + element = struct_list; + struct_list = element->next; + free((PTR) element); + } +} + + +/* Support for line number handling */ +static char *linetab = NULL; +static long linetab_offset; +static unsigned long linetab_size; + +/* Read in all the line numbers for fast lookups later. Leave them in + external (unswapped) format in memory; we'll swap them as we enter + them into GDB's data structures. */ +static int +init_one_section(chan, secinfo) + int chan; + dst_sec *secinfo; +{ + if (secinfo->size == 0 + || lseek(chan, secinfo->position, 0) == -1 + || (secinfo->buffer = xmalloc(secinfo->size)) == NULL + || myread(chan, secinfo->buffer, secinfo->size) == -1) + return 0; + else + return 1; +} + +static int +init_dst_sections (chan) + int chan; +{ + + if (!init_one_section(chan, &blocks_info) || + !init_one_section(chan, &lines_info) || + !init_one_section(chan, &symbols_info)) + return -1; + else + return 0; +} + +/* Fake up support for relocating symbol addresses. FIXME. */ + +struct section_offsets dst_symfile_faker = {0}; + +struct section_offsets * +dst_symfile_offsets (objfile, addr) + struct objfile *objfile; + CORE_ADDR addr; +{ + return &dst_symfile_faker; +} + +/* Register our ability to parse symbols for DST BFD files */ + +static struct sym_fns dst_sym_fns = +{ + "apollo", /* sym_name: name or name prefix of BFD target type */ + 6, /* sym_namelen: number of significant sym_name chars */ + dst_new_init, /* sym_new_init: init anything gbl to entire symtab */ + dst_symfile_init, /* sym_init: read initial info, setup for sym_read() */ + dst_symfile_read, /* sym_read: read a symbol file into symtab */ + dst_symfile_finish, /* sym_finish: finished with file, cleanup */ + dst_symfile_offsets, /* sym_offsets: xlate external to internal form */ + NULL /* next: pointer to next struct sym_fns */ +}; + +void +_initialize_dstread () +{ + add_symtab_fns(&dst_sym_fns); +} -- 2.30.2