From: Tristan Gingold Date: Tue, 10 Nov 2009 11:14:38 +0000 (+0000) Subject: 2009-11-10 Tristan Gingold X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7d2552b4b66cc5a0cfd48526a6960bbfcdf9598f;p=binutils-gdb.git 2009-11-10 Tristan Gingold * avr-tdep.c: Add AVR_PSEUDO_PC_REGNUM and AVR_NUM_PSEUDO_REGS. (struct gdbarch_tdep): Add void_type, func_void_type and pc_type fields. (avr_register_name): Add "pc" name, renames "PC" to "PC2". (avr_register_type): Handle AVR_PSEUDO_PC_REGNUM. (avr_write_pc): Fix indentation. (avr_pseudo_register_read): New function. (avr_pseudo_register_write): New function. (avr_frame_prev_register): Handle AVR_PSEUDO_PC_REGNUM. (avr_gdbarch_init): Create types for pc. Register pseudo regs. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index e04dcd5cb4d..cba136a3f33 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,16 @@ +2009-11-10 Tristan Gingold + + * avr-tdep.c: Add AVR_PSEUDO_PC_REGNUM and AVR_NUM_PSEUDO_REGS. + (struct gdbarch_tdep): Add void_type, func_void_type and pc_type + fields. + (avr_register_name): Add "pc" name, renames "PC" to "PC2". + (avr_register_type): Handle AVR_PSEUDO_PC_REGNUM. + (avr_write_pc): Fix indentation. + (avr_pseudo_register_read): New function. + (avr_pseudo_register_write): New function. + (avr_frame_prev_register): Handle AVR_PSEUDO_PC_REGNUM. + (avr_gdbarch_init): Create types for pc. Register pseudo regs. + 2009-11-10 Tristan Gingold * avr-tdep.c (avr_integer_to_address): New function. diff --git a/gdb/avr-tdep.c b/gdb/avr-tdep.c index 6d6d4886a47..ba6e8cb4129 100644 --- a/gdb/avr-tdep.c +++ b/gdb/avr-tdep.c @@ -89,6 +89,10 @@ enum AVR_NUM_REGS = 32 + 1 /*SREG*/ + 1 /*SP*/ + 1 /*PC*/, AVR_NUM_REG_BYTES = 32 + 1 /*SREG*/ + 2 /*SP*/ + 4 /*PC*/, + /* Pseudo registers. */ + AVR_PSEUDO_PC_REGNUM = 35, + AVR_NUM_PSEUDO_REGS = 1, + AVR_PC_REG_INDEX = 35, /* index into array of registers */ AVR_MAX_PROLOGUE_SIZE = 64, /* bytes */ @@ -181,6 +185,13 @@ struct gdbarch_tdep /* Number of bytes stored to the stack by call instructions. 2 bytes for avr1-5, 3 bytes for avr6. */ int call_length; + + /* Type for void. */ + struct type *void_type; + /* Type for a function returning void. */ + struct type *func_void_type; + /* Type for a pointer to a function. Used for the type of PC. */ + struct type *pc_type; }; /* Lookup the name of a register given it's number. */ @@ -193,7 +204,8 @@ avr_register_name (struct gdbarch *gdbarch, int regnum) "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", - "SREG", "SP", "PC" + "SREG", "SP", "PC2", + "pc" }; if (regnum < 0) return NULL; @@ -210,10 +222,11 @@ avr_register_type (struct gdbarch *gdbarch, int reg_nr) { if (reg_nr == AVR_PC_REGNUM) return builtin_type (gdbarch)->builtin_uint32; + if (reg_nr == AVR_PSEUDO_PC_REGNUM) + return gdbarch_tdep (gdbarch)->pc_type; if (reg_nr == AVR_SP_REGNUM) return builtin_type (gdbarch)->builtin_data_ptr; - else - return builtin_type (gdbarch)->builtin_uint8; + return builtin_type (gdbarch)->builtin_uint8; } /* Instruction address checks and convertions. */ @@ -338,7 +351,43 @@ static void avr_write_pc (struct regcache *regcache, CORE_ADDR val) { regcache_cooked_write_unsigned (regcache, AVR_PC_REGNUM, - avr_convert_iaddr_to_raw (val)); + avr_convert_iaddr_to_raw (val)); +} + +static void +avr_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, + int regnum, gdb_byte *buf) +{ + ULONGEST val; + + switch (regnum) + { + case AVR_PSEUDO_PC_REGNUM: + regcache_raw_read_unsigned (regcache, AVR_PC_REGNUM, &val); + val >>= 1; + store_unsigned_integer (buf, 4, gdbarch_byte_order (gdbarch), val); + break; + default: + internal_error (__FILE__, __LINE__, _("invalid regnum")); + } +} + +static void +avr_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, + int regnum, const gdb_byte *buf) +{ + ULONGEST val; + + switch (regnum) + { + case AVR_PSEUDO_PC_REGNUM: + val = extract_unsigned_integer (buf, 4, gdbarch_byte_order (gdbarch)); + val <<= 1; + regcache_raw_write_unsigned (regcache, AVR_PC_REGNUM, val); + break; + default: + internal_error (__FILE__, __LINE__, _("invalid regnum")); + } } /* Function: avr_scan_prologue @@ -1036,9 +1085,9 @@ avr_frame_prev_register (struct frame_info *this_frame, struct avr_unwind_cache *info = avr_frame_unwind_cache (this_frame, this_prologue_cache); - if (regnum == AVR_PC_REGNUM) + if (regnum == AVR_PC_REGNUM || regnum == AVR_PSEUDO_PC_REGNUM) { - if (trad_frame_addr_p (info->saved_regs, regnum)) + if (trad_frame_addr_p (info->saved_regs, AVR_PC_REGNUM)) { /* Reading the return PC from the PC register is slightly abnormal. register_size(AVR_PC_REGNUM) says it is 4 bytes, @@ -1058,14 +1107,18 @@ avr_frame_prev_register (struct frame_info *this_frame, struct gdbarch *gdbarch = get_frame_arch (this_frame); struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - read_memory (info->saved_regs[regnum].addr, buf, tdep->call_length); + read_memory (info->saved_regs[AVR_PC_REGNUM].addr, + buf, tdep->call_length); /* Extract the PC read from memory as a big-endian. */ pc = 0; for (i = 0; i < tdep->call_length; i++) pc = (pc << 8) | buf[i]; - return frame_unwind_got_constant (this_frame, regnum, pc << 1); + if (regnum == AVR_PC_REGNUM) + pc <<= 1; + + return frame_unwind_got_constant (this_frame, regnum, pc); } return frame_unwind_got_optimized (this_frame, regnum); @@ -1327,6 +1380,14 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) tdep->call_length = call_length; + /* Create a type for PC. We can't use builtin types here, as they may not + be defined. */ + tdep->void_type = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"); + tdep->func_void_type = make_function_type (tdep->void_type, NULL); + tdep->pc_type = arch_type (gdbarch, TYPE_CODE_PTR, 4, NULL); + TYPE_TARGET_TYPE (tdep->pc_type) = tdep->func_void_type; + TYPE_UNSIGNED (tdep->pc_type) = 1; + set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); @@ -1353,6 +1414,10 @@ avr_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_register_name (gdbarch, avr_register_name); set_gdbarch_register_type (gdbarch, avr_register_type); + set_gdbarch_num_pseudo_regs (gdbarch, AVR_NUM_PSEUDO_REGS); + set_gdbarch_pseudo_register_read (gdbarch, avr_pseudo_register_read); + set_gdbarch_pseudo_register_write (gdbarch, avr_pseudo_register_write); + set_gdbarch_return_value (gdbarch, avr_return_value); set_gdbarch_print_insn (gdbarch, print_insn_avr);