along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include "coff/sym.h" /* Needed for PDR below. */
-#include "coff/symconst.h"
-
-#define TARGET_BYTE_ORDER BIG_ENDIAN
-
-/* Floating point is IEEE compliant */
-#define IEEE_FLOAT
+#include "mips/tm-bigmips.h"
/* SGI's assembler doesn't grok dollar signs in identifiers.
So we use dots instead. This item must be coordinated with G++. */
#undef CPLUS_MARKER
#define CPLUS_MARKER '.'
-/* Offset from address of function to start of its code.
- Zero on most machines. */
-
-#define FUNCTION_START_OFFSET 0
-
-/* Advance PC across any function entry prologue instructions
- to reach some "real" code. */
-
-#define SKIP_PROLOGUE(pc) pc = mips_skip_prologue(pc)
-
-/* Immediately after a function call, return the saved pc.
- Can't always go through the frames for this because on some machines
- the new frame is not set up until the new function executes
- some instructions. */
-
-#define SAVED_PC_AFTER_CALL(frame) read_register(RA_REGNUM)
-
-/* Are we currently handling a signal */
-
-#define IN_SIGTRAMP(pc, name) in_sigtramp(pc, name)
-
-/* Address of end of stack space. */
-
-#define STACK_END_ADDR (0x7ffff000)
+/* Redefine register numbers for SGI. */
-/* Stack grows downward. */
-
-#define INNER_THAN <
-
-#define BREAKPOINT {0, 0x5, 0, 0xd}
-
-/* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always. */
-
-#define DECR_PC_AFTER_BREAK 0
-
-/* Nonzero if instruction at PC is a return instruction. "j ra" on mips. */
-
-#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 4) == 0x3e00008)
-
-/* Return 1 if P points to an invalid floating point value. */
-
-#define INVALID_FLOAT(p,l) isa_NAN(p,l)
-
-/* Say how long (all) registers are. */
-
-#define REGISTER_TYPE long
+#undef NUM_REGS
+#undef REGISTER_NAMES
+#undef FP0_REGNUM
+#undef PC_REGNUM
+#undef PS_REGNUM
+#undef HI_REGNUM
+#undef LO_REGNUM
+#undef FCRCS_REGNUM
+#undef FCRIR_REGNUM
/* Number of machine registers */
to be actual register numbers as far as the user is concerned
but do serve to get the desired values when passed to read_register. */
-#define ZERO_REGNUM 0 /* read-only register, always 0 */
-#define A0_REGNUM 4 /* Loc of first arg during a subr call */
-#define SP_REGNUM 29 /* Contains address of top of stack */
-#define FP_REGNUM 30 /* Pseudo register that contains true address of executing stack frame */
-#define RA_REGNUM 31 /* Contains return address value */
#define FP0_REGNUM 32 /* Floating point register 0 (single float) */
#define PC_REGNUM 64 /* Contains program counter */
#define PS_REGNUM 65 /* Contains processor status */
#define LO_REGNUM 68 /* ... */
#define FCRCS_REGNUM 69 /* FP control/status */
#define FCRIR_REGNUM 70 /* FP implementation/revision */
-
-/* Define DO_REGISTERS_INFO() to do machine-specific formatting
- of register dumps. */
-
-#define DO_REGISTERS_INFO(_regnum, fp) mips_do_registers_info(_regnum, fp)
-
-/* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
-#define REGISTER_BYTES (NUM_REGS*4)
-
-/* Index within `registers' of the first byte of the space for
- register N. */
-
-#define REGISTER_BYTE(N) ((N) * 4)
-
-/* Number of bytes of storage in the actual machine representation
- for register N. On mips, all regs are 4 bytes. */
-
-#define REGISTER_RAW_SIZE(N) 4
-
-/* Number of bytes of storage in the program's representation
- for register N. On mips, all regs are 4 bytes. */
-
-#define REGISTER_VIRTUAL_SIZE(N) 4
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-
-#define MAX_REGISTER_RAW_SIZE 4
-
-/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-
-#define MAX_REGISTER_VIRTUAL_SIZE 4
-
-/* Nonzero if register N requires conversion
- from raw format to virtual format. */
-
-#define REGISTER_CONVERTIBLE(N) 0
-
-/* Convert data from raw format for register REGNUM
- to virtual format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
- bcopy ((FROM), (TO), 4);
-
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
- bcopy ((FROM), (TO), 4);
-
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-
-#define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
-/* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
-
-#define STORE_STRUCT_RETURN(addr, sp) \
- { sp = push_word(sp, addr);}
-
-/* Extract from an array REGBUF containing the (raw) register state
- a function return value of type TYPE, and copy that, in virtual format,
- into VALBUF. XXX floats */
-
-#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- bcopy (REGBUF+REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), VALBUF, TYPE_LENGTH (TYPE))
-
-/* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
-
-#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes (REGISTER_BYTE (TYPE_CODE (TYPE) == TYPE_CODE_FLT ? FP0_REGNUM : 2), VALBUF, TYPE_LENGTH (TYPE))
-
-/* Extract from an array REGBUF containing the (raw) register state
- the address in which a function should return its structure value,
- as a CORE_ADDR (or an expression that can be used as one). */
-
-#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF+16))
-
-/* Structures are returned by ref in extra arg0 */
-#define USE_STRUCT_CONVENTION(gcc_p, type) 1
-
-\f
-/* Describe the pointer in each stack frame to the previous stack frame
- (its caller). */
-
-/* FRAME_CHAIN takes a frame's nominal address
- and produces the frame's chain-pointer. */
-
-#define FRAME_CHAIN(thisframe) (FRAME_ADDR)mips_frame_chain(thisframe)
-
-/* Define other aspects of the stack frame. */
-
-
-/* A macro that tells us whether the function invocation represented
- by FI does not have a frame on the stack associated with it. If it
- does not, FRAMELESS is set to 1, else 0. */
-/* We handle this differently for mips, and maybe we should not */
-
-#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) {(FRAMELESS) = 0;}
-
-/* Saved Pc. */
-
-#define FRAME_SAVED_PC(FRAME) (mips_frame_saved_pc(FRAME))
-
-#define FRAME_ARGS_ADDRESS(fi) (fi)->frame
-
-#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
-
-/* Return number of args passed to a frame.
- Can return -1, meaning no way to tell. */
-
-#define FRAME_NUM_ARGS(num, fi) (num = mips_frame_num_args(fi))
-
-/* Return number of bytes at start of arglist that are not really args. */
-
-#define FRAME_ARGS_SKIP 0
-
-/* Put here the code to store, into a struct frame_saved_regs,
- the addresses of the saved registers of frame described by FRAME_INFO.
- This includes special registers such as pc and fp saved in special
- ways in the stack frame. sp is even more special:
- the address we return for it IS the sp for the next frame. */
-
-#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) ( \
- (frame_saved_regs) = *(frame_info)->saved_regs, \
- (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame)
-
-\f
-/* Things needed for making the inferior call functions. */
-
-/* Stack has strict alignment. However, use PUSH_ARGUMENTS
- to take care of it. */
-/*#define STACK_ALIGN(addr) (((addr)+3)&~3)*/
-
-#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
- sp = mips_push_arguments(nargs, args, sp, struct_return, struct_addr)
-
-/* Push an empty stack frame, to record the current PC, etc. */
-
-#define PUSH_DUMMY_FRAME mips_push_dummy_frame()
-
-/* Discard from the stack the innermost frame, restoring all registers. */
-
-#define POP_FRAME mips_pop_frame()
-
-#define MK_OP(op,rs,rt,offset) (((op)<<26)|((rs)<<21)|((rt)<<16)|(offset))
-#define CALL_DUMMY_SIZE (16*4)
-#define Dest_Reg 2
-#define CALL_DUMMY {\
- MK_OP(0,RA_REGNUM,0,8), /* jr $ra # Fake ABOUT_TO_RETURN ...*/\
- 0, /* nop # ... to stop raw backtrace*/\
- 0x27bd0000, /* addu sp,?0 # Pseudo prologue */\
-/* Start here: */\
- MK_OP(061,SP_REGNUM,12,0), /* lwc1 $f12,0(sp) # Reload first 4 args*/\
- MK_OP(061,SP_REGNUM,13,4), /* lwc1 $f13,4(sp) */\
- MK_OP(061,SP_REGNUM,14,8), /* lwc1 $f14,8(sp) */\
- MK_OP(061,SP_REGNUM,15,12), /* lwc1 $f15,12(sp) */\
- MK_OP(043,SP_REGNUM,4,0), /* lw $r4,0(sp) # Re-load FP regs*/\
- MK_OP(043,SP_REGNUM,5,4), /* lw $r5,4(sp) */\
- MK_OP(043,SP_REGNUM,6,8), /* lw $r6,8(sp) */\
- MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\
- (017<<26)| (Dest_Reg << 16), /* lui $r31,<target upper 16 bits>*/\
- MK_OP(13,Dest_Reg,Dest_Reg,0), /* ori $r31,$r31,<lower 16 bits>*/ \
- (Dest_Reg<<21) | (31<<11) | 9, /* jalr $r31 */\
- MK_OP(043,SP_REGNUM,7,12), /* lw $r7,12(sp) */\
- 0x5000d, /* bpt */\
-}
-
-#define CALL_DUMMY_START_OFFSET 12
-
-/* Insert the specified number of args and function address
- into a call sequence of the above form stored at DUMMYNAME. */
-
-#define FIX_CALL_DUMMY(dummyname, start_sp, fun, nargs, args, rettype, gcc_p)\
- (((int*)dummyname)[11] |= (((unsigned long)(fun)) >> 16), \
- ((int*)dummyname)[12] |= (unsigned short)(fun))
-
-/* Specific information about a procedure.
- This overlays the MIPS's PDR records,
- mipsread.c (ab)uses this to save memory */
-
-typedef struct mips_extra_func_info {
- long numargs; /* number of args to procedure (was iopt) */
- PDR pdr; /* Procedure descriptor record */
-} *mips_extra_func_info_t;
-
-#define EXTRA_FRAME_INFO \
- mips_extra_func_info_t proc_desc; \
- int num_args;\
- struct frame_saved_regs *saved_regs;
-
-#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) init_extra_frame_info(fci)
-
-/* Special symbol found in blocks associated with routines. We can hang
- mips_extra_func_info_t's off of this. */
-
-#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
-
-/* Convert a dbx stab register number (from `r' declaration) to a gdb REGNUM */
-
-#define STAB_REG_TO_REGNUM(num) ((num) < 32 ? (num) : (num)+FP0_REGNUM-38)
/* Largest value REGISTER_RAW_SIZE can have. */
-#define MAX_REGISTER_RAW_SIZE 4
+#define MAX_REGISTER_RAW_SIZE 8
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-#define MAX_REGISTER_VIRTUAL_SIZE 4
+#define MAX_REGISTER_VIRTUAL_SIZE 8
/* Nonzero if register N requires conversion
from raw format to virtual format. */
(((N) >= FP0_REGNUM && (N) < FP0_REGNUM+32) \
? builtin_type_float : builtin_type_int) \
+#if HOST_BYTE_ORDER == BIG_ENDIAN
+/* All mips targets store doubles in a register pair with the least
+ significant register in the lower numbered register.
+ If the host is big endian, double register values need conversion between
+ memory and register formats. */
+
+#define REGISTER_CONVERT_TO_TYPE(n, type, buffer) \
+ do {if ((n) >= FP0_REGNUM && (n) < FP0_REGNUM + 32 && \
+ TYPE_CODE(type) == TYPE_CODE_FLT && TYPE_LENGTH(type) == 8) { \
+ char __temp[4]; \
+ memcpy (__temp, ((char *)(buffer))+4, 4); \
+ memcpy (((char *)(buffer))+4, (buffer), 4); \
+ memcpy (((char *)(buffer)), __temp, 4); }} while (0)
+
+#define REGISTER_CONVERT_FROM_TYPE(n, type, buffer) \
+ do {if ((n) >= FP0_REGNUM && (n) < FP0_REGNUM + 32 && \
+ TYPE_CODE(type) == TYPE_CODE_FLT && TYPE_LENGTH(type) == 8) { \
+ char __temp[4]; \
+ memcpy (__temp, ((char *)(buffer))+4, 4); \
+ memcpy (((char *)(buffer))+4, (buffer), 4); \
+ memcpy (((char *)(buffer)), __temp, 4); }} while (0)
+#endif
+
/* Store the address of the place in which to copy the structure the
subroutine will return. This is called from call_function. */
into VALBUF. XXX floats */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- bcopy (REGBUF + REGISTER_BYTE ((TYPE_CODE (TYPE) == TYPE_CODE_FLT && mips_fpu) ? FP0_REGNUM : 2), VALBUF, TYPE_LENGTH (TYPE))
+ mips_extract_return_value(TYPE, REGBUF, VALBUF)
/* Write into appropriate registers a function return value
of type TYPE, given in virtual format. */
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes (REGISTER_BYTE ((TYPE_CODE (TYPE) == TYPE_CODE_FLT && mips_fpu) ? FP0_REGNUM : 2), VALBUF, TYPE_LENGTH (TYPE))
+ mips_store_return_value(TYPE, VALBUF)
/* Extract from an array REGBUF containing the (raw) register state
the address in which a function should return its structure value,
/* Insert the specified number of args and function address
into a call sequence of the above form stored at DUMMYNAME. */
+#if TARGET_BYTE_ORDER == BIG_ENDIAN
+/* For big endian mips machines the loading of FP values depends on whether
+ they are single or double precision. */
+#define FIX_CALL_DUMMY(dummyname, start_sp, fun, nargs, args, rettype, gcc_p) \
+ do { \
+ ((int*)(dummyname))[11] |= ((unsigned long)(fun)) >> 16; \
+ ((int*)(dummyname))[12] |= (unsigned short)(fun); \
+ if (! mips_fpu) { \
+ ((int *) (dummyname))[3] = 0; ((int *) (dummyname))[4] = 0; \
+ ((int *) (dummyname))[5] = 0; ((int *) (dummyname))[6] = 0; \
+ } else { \
+ if (nargs > 0 && \
+ TYPE_CODE(VALUE_TYPE(args[0])) == TYPE_CODE_FLT && \
+ TYPE_LENGTH(VALUE_TYPE(args[0])) == 8) { \
+ ((int *) (dummyname))[3] = MK_OP(061,SP_REGNUM,12,4); \
+ ((int *) (dummyname))[4] = MK_OP(061,SP_REGNUM,13,0); \
+ } \
+ if (nargs > 1 && \
+ TYPE_CODE(VALUE_TYPE(args[1])) == TYPE_CODE_FLT && \
+ TYPE_LENGTH(VALUE_TYPE(args[1])) == 8) { \
+ ((int *) (dummyname))[5] = MK_OP(061,SP_REGNUM,14,12); \
+ ((int *) (dummyname))[6] = MK_OP(061,SP_REGNUM,15,8); \
+ } \
+ } \
+ } while (0)
+#else
#define FIX_CALL_DUMMY(dummyname, start_sp, fun, nargs, args, rettype, gcc_p)\
do \
{ \
} \
} \
while (0)
+#endif
/* There's a mess in stack frame creation. See comments in blockframe.c
near reference to INIT_FRAME_PC_FIRST. */
#endif
#include <sys/param.h>
-#include <sys/dir.h>
#include <signal.h>
#include <sys/ioctl.h>
mips_print_register (regnum, all)
int regnum, all;
{
- unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE * 2]; /* *2 for doubles */
+ unsigned char raw_buffer[MAX_REGISTER_RAW_SIZE];
REGISTER_TYPE val;
/* Get the data in raw format. */
/* If an even floating pointer register, also print as double. */
if (regnum >= FP0_REGNUM && regnum < FP0_REGNUM+32
&& !((regnum-FP0_REGNUM) & 1)) {
- read_relative_register_raw_bytes (regnum+1, raw_buffer+4);
+ char dbuffer[MAX_REGISTER_RAW_SIZE];
+
+ read_relative_register_raw_bytes (regnum, dbuffer);
+ read_relative_register_raw_bytes (regnum+1, dbuffer+4);
+#ifdef REGISTER_CONVERT_TO_TYPE
+ REGISTER_CONVERT_TO_TYPE(regnum, builtin_type_double, dbuffer);
+#endif
printf_filtered ("(d%d: ", regnum-FP0_REGNUM);
- val_print (builtin_type_double, raw_buffer, 0,
+ val_print (builtin_type_double, dbuffer, 0,
stdout, 0, 1, 0, Val_pretty_default);
printf_filtered ("); ");
}
#endif
}
+/* Given a return value in `regbuf' with a type `valtype',
+ extract and copy its value into `valbuf'. */
+void
+mips_extract_return_value (valtype, regbuf, valbuf)
+ struct type *valtype;
+ char regbuf[REGISTER_BYTES];
+ char *valbuf;
+{
+ int regnum;
+
+ regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT && mips_fpu ? FP0_REGNUM : 2;
+
+ memcpy (valbuf, regbuf + REGISTER_BYTE (regnum), TYPE_LENGTH (valtype));
+#ifdef REGISTER_CONVERT_TO_TYPE
+ REGISTER_CONVERT_TO_TYPE(regnum, valtype, valbuf);
+#endif
+}
+
+/* Given a return value in `regbuf' with a type `valtype',
+ write it's value into the appropriate register. */
+void
+mips_store_return_value (valtype, valbuf)
+ struct type *valtype;
+ char *valbuf;
+{
+ int regnum;
+ char raw_buffer[MAX_REGISTER_RAW_SIZE];
+
+ regnum = TYPE_CODE (valtype) == TYPE_CODE_FLT && mips_fpu ? FP0_REGNUM : 2;
+ memcpy(raw_buffer, valbuf, TYPE_LENGTH (valtype));
+
+#ifdef REGISTER_CONVERT_FROM_TYPE
+ REGISTER_CONVERT_FROM_TYPE(regnum, valtype, raw_buffer);
+#endif
+
+ write_register_bytes(REGISTER_BYTE (regnum), raw_buffer, TYPE_LENGTH (valtype));
+}
+
/* Let the user turn off floating point and set the fence post for
heuristic_proc_start. */
(add_set_cmd ("heuristic-fence-post", class_support, var_uinteger,
(char *) &heuristic_fence_post,
"Set the distance searched for the start of a function.\n\
-Set number of bytes to be searched backward to find the beginning of a
+Set number of bytes to be searched backward to find the beginning of a\n\
function without symbols.", &setlist),
&showlist);
}
projects / binutils-gdb.git / commitdiff