diff options
Diffstat (limited to 'gdb/ia64-tdep.c')
| -rw-r--r-- | gdb/ia64-tdep.c | 498 |
1 files changed, 348 insertions, 150 deletions
diff --git a/gdb/ia64-tdep.c b/gdb/ia64-tdep.c index ae35b73a59b..e220e27b503 100644 --- a/gdb/ia64-tdep.c +++ b/gdb/ia64-tdep.c @@ -23,10 +23,12 @@ #include "inferior.h" #include "symfile.h" /* for entry_point_address */ #include "gdbcore.h" +#include "arch-utils.h" #include "floatformat.h" #include "objfiles.h" #include "elf/common.h" /* for DT_PLTGOT value */ +#include "elf-bfd.h" typedef enum instruction_type { @@ -63,6 +65,8 @@ typedef enum instruction_type extern void _initialize_ia64_tdep (void); +extern CORE_ADDR ia64_linux_sigcontext_register_address (CORE_ADDR, int); + static gdbarch_init_ftype ia64_gdbarch_init; static gdbarch_register_name_ftype ia64_register_name; @@ -188,23 +192,36 @@ static char *ia64_register_names[] = }; struct frame_extra_info -{ - CORE_ADDR bsp; /* points at r32 for the current frame */ - CORE_ADDR cfm; /* cfm value for current frame */ - int sof; /* Size of frame (decoded from cfm value) */ - int sol; /* Size of locals (decoded from cfm value) */ - CORE_ADDR after_prologue; - /* Address of first instruction after the last + { + CORE_ADDR bsp; /* points at r32 for the current frame */ + CORE_ADDR cfm; /* cfm value for current frame */ + int sof; /* Size of frame (decoded from cfm value) */ + int sol; /* Size of locals (decoded from cfm value) */ + CORE_ADDR after_prologue; + /* Address of first instruction after the last prologue instruction; Note that there may be instructions from the function's body intermingled with the prologue. */ - int mem_stack_frame_size; - /* Size of the memory stack frame (may be zero), + int mem_stack_frame_size; + /* Size of the memory stack frame (may be zero), or -1 if it has not been determined yet. */ - int fp_reg; /* Register number (if any) used a frame pointer - for this frame. 0 if no register is being used + int fp_reg; /* Register number (if any) used a frame pointer + for this frame. 0 if no register is being used as the frame pointer. */ -}; + }; + +struct gdbarch_tdep + { + int os_ident; /* From the ELF header, one of the ELFOSABI_ + constants: ELFOSABI_LINUX, ELFOSABI_MONTEREY, + etc. */ + CORE_ADDR (*sigcontext_register_address) (CORE_ADDR, int); + /* OS specific function which, given a frame address + and register number, returns the offset to the + given register from the start of the frame. */ + }; + +#define SIGCONTEXT_REGISTER_ADDRESS (gdbarch_tdep (current_gdbarch)->sigcontext_register_address) static char * ia64_register_name (int reg) @@ -281,10 +298,35 @@ ia64_register_byte (int reg) (reg <= IA64_FR0_REGNUM ? 0 : 8 * ((reg > IA64_FR127_REGNUM) ? 128 : reg - IA64_FR0_REGNUM)); } +/* Read the given register from a sigcontext structure in the + specified frame. */ + +static CORE_ADDR +read_sigcontext_register (struct frame_info *frame, int regnum) +{ + CORE_ADDR regaddr; + + if (frame == NULL) + internal_error ("read_sigcontext_register: NULL frame"); + if (!frame->signal_handler_caller) + internal_error ( + "read_sigcontext_register: frame not a signal_handler_caller"); + if (SIGCONTEXT_REGISTER_ADDRESS == 0) + internal_error ( + "read_sigcontext_register: SIGCONTEXT_REGISTER_ADDRESS is 0"); + + regaddr = SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regnum); + if (regaddr) + return read_memory_integer (regaddr, REGISTER_RAW_SIZE (regnum)); + else + internal_error ( + "read_sigcontext_register: Register %d not in struct sigcontext", regnum); +} + /* Extract ``len'' bits from an instruction bundle starting at bit ``from''. */ -long long +static long long extract_bit_field (char *bundle, int from, int len) { long long result = 0LL; @@ -320,7 +362,7 @@ extract_bit_field (char *bundle, int from, int len) /* Replace the specified bits in an instruction bundle */ -void +static void replace_bit_field (char *bundle, long long val, int from, int len) { int to = from + len; @@ -370,7 +412,7 @@ replace_bit_field (char *bundle, long long val, int from, int len) /* Return the contents of slot N (for N = 0, 1, or 2) in and instruction bundle */ -long long +static long long slotN_contents (unsigned char *bundle, int slotnum) { return extract_bit_field (bundle, 5+41*slotnum, 41); @@ -378,7 +420,7 @@ slotN_contents (unsigned char *bundle, int slotnum) /* Store an instruction in an instruction bundle */ -void +static void replace_slotN_contents (unsigned char *bundle, long long instr, int slotnum) { replace_bit_field (bundle, instr, 5+41*slotnum, 41); @@ -607,23 +649,38 @@ rse_address_add(CORE_ADDR addr, int nslots) CORE_ADDR ia64_frame_chain (struct frame_info *frame) { - FRAME_INIT_SAVED_REGS (frame); - - if (frame->saved_regs[IA64_VFP_REGNUM]) - return read_memory_integer (frame->saved_regs[IA64_VFP_REGNUM], 8); + if (frame->signal_handler_caller) + return read_sigcontext_register (frame, sp_regnum); + else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) + return frame->frame; else - return frame->frame + frame->extra_info->mem_stack_frame_size; + { + FRAME_INIT_SAVED_REGS (frame); + if (frame->saved_regs[IA64_VFP_REGNUM]) + return read_memory_integer (frame->saved_regs[IA64_VFP_REGNUM], 8); + else + return frame->frame + frame->extra_info->mem_stack_frame_size; + } } CORE_ADDR ia64_frame_saved_pc (struct frame_info *frame) { - FRAME_INIT_SAVED_REGS (frame); + if (frame->signal_handler_caller) + return read_sigcontext_register (frame, pc_regnum); + else if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) + return generic_read_register_dummy (frame->pc, frame->frame, pc_regnum); + else + { + FRAME_INIT_SAVED_REGS (frame); - if (frame->saved_regs[IA64_VRAP_REGNUM]) - return read_memory_integer (frame->saved_regs[IA64_VRAP_REGNUM], 8); - else /* either frameless, or not far enough along in the prologue... */ - return ia64_saved_pc_after_call (frame); + if (frame->saved_regs[IA64_VRAP_REGNUM]) + return read_memory_integer (frame->saved_regs[IA64_VRAP_REGNUM], 8); + else if (frame->next && frame->next->signal_handler_caller) + return read_sigcontext_register (frame->next, IA64_BR0_REGNUM); + else /* either frameless, or not far enough along in the prologue... */ + return ia64_saved_pc_after_call (frame); + } } #define isScratch(_regnum_) ((_regnum_) == 2 || (_regnum_) == 3 \ @@ -651,6 +708,11 @@ examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) int mem_stack_frame_size = 0; int spill_reg = 0; CORE_ADDR spill_addr = 0; + char instores[8]; + char infpstores[8]; + + memset (instores, 0, sizeof instores); + memset (infpstores, 0, sizeof infpstores); if (frame && !frame->saved_regs) { @@ -693,7 +755,13 @@ examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) if (next_pc == 0) break; - if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL)) + if (it == B || ((instr & 0x3fLL) != 0LL)) + { + /* Exit loop upon hitting a branch instruction or a predicated + instruction. */ + break; + } + else if (it == I && ((instr & 0x1eff8000000LL) == 0x00188000000LL)) { /* Move from BR */ int b2 = (int) ((instr & 0x0000000e000LL) >> 13); @@ -843,6 +911,48 @@ examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) spill_addr = 0; /* must be done spilling */ last_prologue_pc = next_pc; } + else if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) + { + /* Allow up to one store of each input register. */ + instores[rM-32] = 1; + last_prologue_pc = next_pc; + } + } + else if (it == M && ((instr & 0x1ff08000000LL) == 0x08c00000000LL)) + { + /* One of + st1 [rN] = rM + st2 [rN] = rM + st4 [rN] = rM + st8 [rN] = rM + Note that the st8 case is handled in the clause above. + + Advance over stores of input registers. One store per input + register is permitted. */ + int rM = (int) ((instr & 0x000000fe000LL) >> 13); + int qp = (int) (instr & 0x0000000003fLL); + if (qp == 0 && 32 <= rM && rM < 40 && !instores[rM-32]) + { + instores[rM-32] = 1; + last_prologue_pc = next_pc; + } + } + else if (it == M && ((instr & 0x1ff88000000LL) == 0x0cc80000000LL)) + { + /* Either + stfs [rN] = fM + or + stfd [rN] = fM + + Advance over stores of floating point input registers. Again + one store per register is permitted */ + int fM = (int) ((instr & 0x000000fe000LL) >> 13); + int qp = (int) (instr & 0x0000000003fLL); + if (qp == 0 && 8 <= fM && fM < 16 && !infpstores[fM - 8]) + { + infpstores[fM-8] = 1; + last_prologue_pc = next_pc; + } } else if (it == M && ( ((instr & 0x1ffc8000000LL) == 0x08ec0000000LL) @@ -869,8 +979,6 @@ examine_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct frame_info *frame) last_prologue_pc = next_pc; } } - else if (it == B || ((instr & 0x3fLL) != 0LL)) - break; pc = next_pc; } @@ -916,50 +1024,55 @@ ia64_skip_prologue (CORE_ADDR pc) void ia64_frame_init_saved_regs (struct frame_info *frame) { - CORE_ADDR func_start; - if (frame->saved_regs) return; - func_start = get_pc_function_start (frame->pc); - examine_prologue (func_start, frame->pc, frame); -} + if (frame->signal_handler_caller && SIGCONTEXT_REGISTER_ADDRESS) + { + int regno; -static CORE_ADDR -ia64_find_saved_register (frame, regnum) - struct frame_info *frame; - int regnum; -{ - register CORE_ADDR addr = 0; + frame_saved_regs_zalloc (frame); - if ((IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM) - || regnum == IA64_VFP_REGNUM - || regnum == IA64_VRAP_REGNUM) - { - FRAME_INIT_SAVED_REGS (frame); - return frame->saved_regs[regnum]; - } - else if (regnum == IA64_IP_REGNUM && frame->next) - { - FRAME_INIT_SAVED_REGS (frame->next); - return frame->next->saved_regs[IA64_VRAP_REGNUM]; + frame->saved_regs[IA64_VRAP_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_IP_REGNUM); + frame->saved_regs[IA64_CFM_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CFM_REGNUM); + frame->saved_regs[IA64_PSR_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PSR_REGNUM); +#if 0 + frame->saved_regs[IA64_BSP_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_BSP_REGNUM); +#endif + frame->saved_regs[IA64_RNAT_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_RNAT_REGNUM); + frame->saved_regs[IA64_CCV_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_CCV_REGNUM); + frame->saved_regs[IA64_UNAT_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_UNAT_REGNUM); + frame->saved_regs[IA64_FPSR_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_FPSR_REGNUM); + frame->saved_regs[IA64_PFS_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_PFS_REGNUM); + frame->saved_regs[IA64_LC_REGNUM] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, IA64_LC_REGNUM); + for (regno = IA64_GR1_REGNUM; regno <= IA64_GR31_REGNUM; regno++) + if (regno != sp_regnum) + frame->saved_regs[regno] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); + for (regno = IA64_BR0_REGNUM; regno <= IA64_BR7_REGNUM; regno++) + frame->saved_regs[regno] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); + for (regno = IA64_FR2_REGNUM; regno <= IA64_BR7_REGNUM; regno++) + frame->saved_regs[regno] = + SIGCONTEXT_REGISTER_ADDRESS (frame->frame, regno); } else { - struct frame_info *frame1 = NULL; - while (1) - { - QUIT; - frame1 = get_prev_frame (frame1); - if (frame1 == 0 || frame1 == frame) - break; - FRAME_INIT_SAVED_REGS (frame1); - if (frame1->saved_regs[regnum]) - addr = frame1->saved_regs[regnum]; - } - } + CORE_ADDR func_start; - return addr; + func_start = get_pc_function_start (frame->pc); + examine_prologue (func_start, frame->pc, frame); + } } void @@ -970,76 +1083,29 @@ ia64_get_saved_register (char *raw_buffer, int regnum, enum lval_type *lval) { - CORE_ADDR addr; + int is_dummy_frame; if (!target_has_registers) error ("No registers."); if (optimized != NULL) *optimized = 0; - addr = ia64_find_saved_register (frame, regnum); - if (addr != 0) - { - if (lval != NULL) - *lval = lval_memory; - if (regnum == SP_REGNUM) - { - if (raw_buffer != NULL) - { - /* Put it back in target format. */ - store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), (LONGEST) addr); - } - if (addrp != NULL) - *addrp = 0; - return; - } - if (raw_buffer != NULL) - read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum)); - } - else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM) - { - /* r32 - r127 must be fetchable via memory. If they aren't, - then the register is unavailable */ - addr = 0; - if (lval != NULL) - *lval = not_lval; - memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum)); - } - else if (regnum == IA64_IP_REGNUM) - { - CORE_ADDR pc; - if (frame->next) - { - /* This case will normally be handled above, except when it's - frameless or we haven't advanced far enough into the prologue - of the top frame to save the register. */ - addr = REGISTER_BYTE (regnum); - if (lval != NULL) - *lval = lval_register; - pc = ia64_saved_pc_after_call (frame); - } - else - { - addr = 0; - if (lval != NULL) - *lval = not_lval; - pc = read_pc (); - } - store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc); - } - else if (regnum == SP_REGNUM && frame->next) + + if (addrp != NULL) + *addrp = 0; + + if (lval != NULL) + *lval = not_lval; + + is_dummy_frame = PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame); + + if (regnum == SP_REGNUM && frame->next) { /* Handle SP values for all frames but the topmost. */ - addr = 0; - if (lval != NULL) - *lval = not_lval; store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->frame); } else if (regnum == IA64_BSP_REGNUM) { - addr = 0; - if (lval != NULL) - *lval = not_lval; store_address (raw_buffer, REGISTER_RAW_SIZE (regnum), frame->extra_info->bsp); } @@ -1050,9 +1116,6 @@ ia64_get_saved_register (char *raw_buffer, above. If the function lacks one of these frame pointers, we can still provide a value since we know the size of the frame */ CORE_ADDR vfp = frame->frame + frame->extra_info->mem_stack_frame_size; - addr = 0; - if (lval != NULL) - *lval = not_lval; store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_VFP_REGNUM), vfp); } else if (IA64_PR0_REGNUM <= regnum && regnum <= IA64_PR63_REGNUM) @@ -1067,9 +1130,6 @@ ia64_get_saved_register (char *raw_buffer, prN_val = extract_bit_field ((unsigned char *) pr_raw_buffer, regnum - IA64_PR0_REGNUM, 1); store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), prN_val); - addr = 0; - if (lval != NULL) - *lval = not_lval; } else if (IA64_NAT0_REGNUM <= regnum && regnum <= IA64_NAT31_REGNUM) { @@ -1084,18 +1144,20 @@ ia64_get_saved_register (char *raw_buffer, regnum - IA64_NAT0_REGNUM, 1); store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), unatN_val); - addr = 0; - if (lval != NULL) - *lval = not_lval; } else if (IA64_NAT32_REGNUM <= regnum && regnum <= IA64_NAT127_REGNUM) { int natval = 0; /* Find address of general register corresponding to nat bit we're interested in. */ - CORE_ADDR gr_addr = - ia64_find_saved_register (frame, - regnum - IA64_NAT0_REGNUM + IA64_GR0_REGNUM); + CORE_ADDR gr_addr = 0; + + if (!is_dummy_frame) + { + FRAME_INIT_SAVED_REGS (frame); + gr_addr = frame->saved_regs[ regnum - IA64_NAT0_REGNUM + + IA64_GR0_REGNUM]; + } if (gr_addr) { /* Compute address of nat collection bits */ @@ -1114,20 +1176,50 @@ ia64_get_saved_register (char *raw_buffer, natval = (nat_collection >> nat_bit) & 1; } store_unsigned_integer (raw_buffer, REGISTER_RAW_SIZE (regnum), natval); - addr = 0; - if (lval != NULL) - *lval = not_lval; + } + else if (regnum == IA64_IP_REGNUM) + { + CORE_ADDR pc; + if (frame->next) + { + /* FIXME: Set *addrp, *lval when possible. */ + pc = ia64_frame_saved_pc (frame->next); + } + else + { + pc = read_pc (); + } + store_address (raw_buffer, REGISTER_RAW_SIZE (IA64_IP_REGNUM), pc); + } + else if (IA64_GR32_REGNUM <= regnum && regnum <= IA64_GR127_REGNUM) + { + CORE_ADDR addr = 0; + if (!is_dummy_frame) + { + FRAME_INIT_SAVED_REGS (frame); + addr = frame->saved_regs[regnum]; + } + + if (addr != 0) + { + if (lval != NULL) + *lval = lval_memory; + if (addrp != NULL) + *addrp = addr; + read_memory (addr, raw_buffer, REGISTER_RAW_SIZE (regnum)); + } + else + { + /* r32 - r127 must be fetchable via memory. If they aren't, + then the register is unavailable */ + memset (raw_buffer, 0, REGISTER_RAW_SIZE (regnum)); + } } else { - if (lval != NULL) - *lval = lval_register; - addr = REGISTER_BYTE (regnum); - if (raw_buffer != NULL) - read_register_gen (regnum, raw_buffer); + generic_get_saved_register (raw_buffer, optimized, addrp, frame, + regnum, lval); } - if (addrp != NULL) - *addrp = addr; } /* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of @@ -1230,6 +1322,9 @@ void ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) { CORE_ADDR bsp, cfm; + int next_frame_is_call_dummy = ((frame->next != NULL) + && PC_IN_CALL_DUMMY (frame->next->pc, frame->next->frame, + frame->next->frame)); frame->extra_info = (struct frame_extra_info *) frame_obstack_alloc (sizeof (struct frame_extra_info)); @@ -1240,6 +1335,18 @@ ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) cfm = read_register (IA64_CFM_REGNUM); } + else if (frame->next->signal_handler_caller) + { + bsp = read_sigcontext_register (frame->next, IA64_BSP_REGNUM); + cfm = read_sigcontext_register (frame->next, IA64_CFM_REGNUM); + } + else if (next_frame_is_call_dummy) + { + bsp = generic_read_register_dummy (frame->next->pc, frame->next->frame, + IA64_BSP_REGNUM); + cfm = generic_read_register_dummy (frame->next->pc, frame->next->frame, + IA64_CFM_REGNUM); + } else { struct frame_info *frn = frame->next; @@ -1248,6 +1355,13 @@ ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) if (frn->saved_regs[IA64_CFM_REGNUM] != 0) cfm = read_memory_integer (frn->saved_regs[IA64_CFM_REGNUM], 8); + else if (frn->next && frn->next->signal_handler_caller) + cfm = read_sigcontext_register (frn->next, IA64_PFS_REGNUM); + else if (frn->next + && PC_IN_CALL_DUMMY (frn->next->pc, frn->next->frame, + frn->next->frame)) + cfm = generic_read_register_dummy (frn->next->pc, frn->next->frame, + IA64_PFS_REGNUM); else cfm = read_register (IA64_PFS_REGNUM); @@ -1256,7 +1370,9 @@ ia64_init_extra_frame_info (int fromleaf, struct frame_info *frame) frame->extra_info->cfm = cfm; frame->extra_info->sof = cfm & 0x7f; frame->extra_info->sol = (cfm >> 7) & 0x7f; - if (frame->next == 0) + if (frame->next == 0 + || frame->next->signal_handler_caller + || next_frame_is_call_dummy) frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sof); else frame->extra_info->bsp = rse_address_add (bsp, -frame->extra_info->sol); @@ -1719,16 +1835,98 @@ ia64_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes, *targ_len = nr_bytes; } +static void +process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) +{ + int *os_ident_ptr = obj; + const char *name; + unsigned int sectsize; + + name = bfd_get_section_name (abfd, sect); + sectsize = bfd_section_size (abfd, sect); + if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) + { + unsigned int name_length, data_length, note_type; + char *note = alloca (sectsize); + + bfd_get_section_contents (abfd, sect, note, + (file_ptr) 0, (bfd_size_type) sectsize); + + name_length = bfd_h_get_32 (abfd, note); + data_length = bfd_h_get_32 (abfd, note + 4); + note_type = bfd_h_get_32 (abfd, note + 8); + + if (name_length == 4 && data_length == 16 && note_type == 1 + && strcmp (note + 12, "GNU") == 0) + { + int os_number = bfd_h_get_32 (abfd, note + 16); + + /* The case numbers are from abi-tags in glibc */ + switch (os_number) + { + case 0 : + *os_ident_ptr = ELFOSABI_LINUX; + break; +#if 0 /* FIXME: Enable after internal repository is synced with sourceware */ + case 1 : + *os_ident_ptr = ELFOSABI_HURD; + break; + case 2 : + *os_ident_ptr = ELFOSABI_SOLARIS; + break; +#endif + default : + internal_error ( + "process_note_abi_sections: unknown OS number %d", os_number); + break; + } + } + } +} + static struct gdbarch * ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) { struct gdbarch *gdbarch; + struct gdbarch_tdep *tdep; + int os_ident; - arches = gdbarch_list_lookup_by_info (arches, &info); - if (arches != NULL) - return arches->gdbarch; + if (info.abfd != NULL + && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) + { + os_ident = elf_elfheader (info.abfd)->e_ident[EI_OSABI]; - gdbarch = gdbarch_alloc (&info, NULL); + /* If os_ident is 0, it is not necessarily the case that we're on a + SYSV system. (ELFOSABI_NONE is defined to be 0.) GNU/Linux uses + a note section to record OS/ABI info, but leaves e_ident[EI_OSABI] + zero. So we have to check for note sections too. */ + if (os_ident == 0) + { + bfd_map_over_sections (info.abfd, + process_note_abi_tag_sections, + &os_ident); + } + } + else + os_ident = -1; + + for (arches = gdbarch_list_lookup_by_info (arches, &info); + arches != NULL; + arches = gdbarch_list_lookup_by_info (arches->next, &info)) + { + if (gdbarch_tdep (current_gdbarch)->os_ident != os_ident) + continue; + return arches->gdbarch; + } + + tdep = xmalloc (sizeof (struct gdbarch_tdep)); + gdbarch = gdbarch_alloc (&info, tdep); + tdep->os_ident = os_ident; + + if (os_ident == ELFOSABI_LINUX) + tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address; + else + tdep->sigcontext_register_address = 0; set_gdbarch_short_bit (gdbarch, 16); set_gdbarch_int_bit (gdbarch, 32); @@ -1762,7 +1960,7 @@ ia64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_saved_pc_after_call (gdbarch, ia64_saved_pc_after_call); set_gdbarch_frame_chain (gdbarch, ia64_frame_chain); - set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid); + set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid); set_gdbarch_frame_saved_pc (gdbarch, ia64_frame_saved_pc); set_gdbarch_frame_init_saved_regs (gdbarch, ia64_frame_init_saved_regs); |