int find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr, int *is_gnu_ifunc_p) { struct obj_section *section; struct symbol *f; struct minimal_symbol *msymbol; struct symtab *symtab = NULL; struct objfile *objfile; int i; CORE_ADDR mapped_pc; /* To ensure that the symbol returned belongs to the correct setion (and that the last [random] symbol from the previous section isn't returned) try to find the section containing PC. First try the overlay code (which by default returns NULL); and second try the normal section code (which almost always succeeds). */ section = find_pc_overlay (pc); if (section == NULL) section = find_pc_section (pc); mapped_pc = overlay_mapped_address (pc, section); if (mapped_pc >= cache_pc_function_low && mapped_pc < cache_pc_function_high && section == cache_pc_function_section) goto return_cached_value; msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section); ALL_OBJFILES (objfile) { if (objfile->sf) symtab = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol, mapped_pc, section, 0); if (symtab) break; } if (symtab) { /* Checking whether the msymbol has a larger value is for the "pathological" case mentioned in print_frame_info. */ f = find_pc_sect_function (mapped_pc, section); if (f != NULL && (msymbol == NULL || (BLOCK_START (SYMBOL_BLOCK_VALUE (f)) >= SYMBOL_VALUE_ADDRESS (msymbol)))) { cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f)); cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f)); cache_pc_function_name = SYMBOL_LINKAGE_NAME (f); cache_pc_function_section = section; cache_pc_function_is_gnu_ifunc = TYPE_GNU_IFUNC (SYMBOL_TYPE (f)); goto return_cached_value; } } /* Not in the normal symbol tables, see if the pc is in a known section. If it's not, then give up. This ensures that anything beyond the end of the text seg doesn't appear to be part of the last function in the text segment. */ if (!section) msymbol = NULL; /* Must be in the minimal symbol table. */ if (msymbol == NULL) { /* No available symbol. */ if (name != NULL) *name = 0; if (address != NULL) *address = 0; if (endaddr != NULL) *endaddr = 0; if (is_gnu_ifunc_p != NULL) *is_gnu_ifunc_p = 0; return 0; } cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol); cache_pc_function_name = SYMBOL_LINKAGE_NAME (msymbol); cache_pc_function_section = section; cache_pc_function_is_gnu_ifunc = MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc; /* If the minimal symbol has a size, use it for the cache. Otherwise use the lesser of the next minimal symbol in the same section, or the end of the section, as the end of the function. */ if (MSYMBOL_SIZE (msymbol) != 0) cache_pc_function_high = cache_pc_function_low + MSYMBOL_SIZE (msymbol); else { /* Step over other symbols at this same address, and symbols in other sections, to find the next symbol in this section with a different address. */ for (i = 1; SYMBOL_LINKAGE_NAME (msymbol + i) != NULL; i++) { if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol) && SYMBOL_OBJ_SECTION (msymbol + i) == SYMBOL_OBJ_SECTION (msymbol)) break; } if (SYMBOL_LINKAGE_NAME (msymbol + i) != NULL && SYMBOL_VALUE_ADDRESS (msymbol + i) < obj_section_endaddr (section)) cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i); else /* We got the start address from the last msymbol in the objfile. So the end address is the end of the section. */ cache_pc_function_high = obj_section_endaddr (section); } return_cached_value: if (address) { if (pc_in_unmapped_range (pc, section)) *address = overlay_unmapped_address (cache_pc_function_low, section); else *address = cache_pc_function_low; } if (name) *name = cache_pc_function_name; if (endaddr) { if (pc_in_unmapped_range (pc, section)) { /* Because the high address is actually beyond the end of the function (and therefore possibly beyond the end of the overlay), we must actually convert (high - 1) and then add one to that. */ *endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1, section); } else *endaddr = cache_pc_function_high; } if (is_gnu_ifunc_p) *is_gnu_ifunc_p = cache_pc_function_is_gnu_ifunc; return 1; }
int find_pc_partial_function (CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr, const struct block **block) { struct obj_section *section; struct symbol *f; struct bound_minimal_symbol msymbol; struct compunit_symtab *compunit_symtab = NULL; CORE_ADDR mapped_pc; /* To ensure that the symbol returned belongs to the correct setion (and that the last [random] symbol from the previous section isn't returned) try to find the section containing PC. First try the overlay code (which by default returns NULL); and second try the normal section code (which almost always succeeds). */ section = find_pc_overlay (pc); if (section == NULL) section = find_pc_section (pc); mapped_pc = overlay_mapped_address (pc, section); if (mapped_pc >= cache_pc_function_low && mapped_pc < cache_pc_function_high && section == cache_pc_function_section) goto return_cached_value; msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section); for (objfile *objfile : current_program_space->objfiles ()) { if (objfile->sf) { compunit_symtab = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol, mapped_pc, section, 0); } if (compunit_symtab != NULL) break; } if (compunit_symtab != NULL) { /* Checking whether the msymbol has a larger value is for the "pathological" case mentioned in stack.c:find_frame_funname. We use BLOCK_ENTRY_PC instead of BLOCK_START_PC for this comparison because the minimal symbol should refer to the function's entry pc which is not necessarily the lowest address of the function. This will happen when the function has more than one range and the entry pc is not within the lowest range of addresses. */ f = find_pc_sect_function (mapped_pc, section); if (f != NULL && (msymbol.minsym == NULL || (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (f)) >= BMSYMBOL_VALUE_ADDRESS (msymbol)))) { const struct block *b = SYMBOL_BLOCK_VALUE (f); cache_pc_function_name = SYMBOL_LINKAGE_NAME (f); cache_pc_function_section = section; cache_pc_function_block = b; /* For blocks occupying contiguous addresses (i.e. no gaps), the low and high cache addresses are simply the start and end of the block. For blocks with non-contiguous ranges, we have to search for the range containing mapped_pc and then use the start and end of that range. This causes the returned *ADDRESS and *ENDADDR values to be limited to the range in which mapped_pc is found. See comment preceding declaration of find_pc_partial_function in symtab.h for more information. */ if (BLOCK_CONTIGUOUS_P (b)) { cache_pc_function_low = BLOCK_START (b); cache_pc_function_high = BLOCK_END (b); } else { int i; for (i = 0; i < BLOCK_NRANGES (b); i++) { if (BLOCK_RANGE_START (b, i) <= mapped_pc && mapped_pc < BLOCK_RANGE_END (b, i)) { cache_pc_function_low = BLOCK_RANGE_START (b, i); cache_pc_function_high = BLOCK_RANGE_END (b, i); break; } } /* Above loop should exit via the break. */ gdb_assert (i < BLOCK_NRANGES (b)); } goto return_cached_value; } } /* Not in the normal symbol tables, see if the pc is in a known section. If it's not, then give up. This ensures that anything beyond the end of the text seg doesn't appear to be part of the last function in the text segment. */ if (!section) msymbol.minsym = NULL; /* Must be in the minimal symbol table. */ if (msymbol.minsym == NULL) { /* No available symbol. */ if (name != NULL) *name = 0; if (address != NULL) *address = 0; if (endaddr != NULL) *endaddr = 0; return 0; } cache_pc_function_low = BMSYMBOL_VALUE_ADDRESS (msymbol); cache_pc_function_name = MSYMBOL_LINKAGE_NAME (msymbol.minsym); cache_pc_function_section = section; cache_pc_function_high = minimal_symbol_upper_bound (msymbol); cache_pc_function_block = nullptr; return_cached_value: if (address) { if (pc_in_unmapped_range (pc, section)) *address = overlay_unmapped_address (cache_pc_function_low, section); else *address = cache_pc_function_low; } if (name) *name = cache_pc_function_name; if (endaddr) { if (pc_in_unmapped_range (pc, section)) { /* Because the high address is actually beyond the end of the function (and therefore possibly beyond the end of the overlay), we must actually convert (high - 1) and then add one to that. */ *endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1, section); } else *endaddr = cache_pc_function_high; } if (block != nullptr) *block = cache_pc_function_block; return 1; }
static int find_pc_partial_function_impl (CORE_ADDR pc, char **name, CORE_ADDR *address, CORE_ADDR *endaddr, int inlining_flag) { struct bfd_section *section; struct partial_symtab *pst; struct symbol *f; struct minimal_symbol *msymbol; struct partial_symbol *psb; struct obj_section *osect; int i; CORE_ADDR mapped_pc; /* To ensure that the symbol returned belongs to the correct setion (and that the last [random] symbol from the previous section isn't returned) try to find the section containing PC. First try the overlay code (which by default returns NULL); and second try the normal section code (which almost always succeeds). */ section = find_pc_overlay (pc); if (section == NULL) { struct obj_section *obj_section = find_pc_section (pc); if (obj_section == NULL) section = NULL; else section = obj_section->the_bfd_section; } mapped_pc = overlay_mapped_address (pc, section); if (mapped_pc >= cache_pc_function_low && mapped_pc < cache_pc_function_high && section == cache_pc_function_section && inlining_flag == cache_pc_function_inlining) goto return_cached_value; cache_pc_function_inlining = inlining_flag; msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section); pst = find_pc_sect_psymtab (mapped_pc, section); if (pst) { /* Need to read the symbols to get a good value for the end address. */ if (endaddr != NULL && !pst->readin) { /* Need to get the terminal in case symbol-reading produces output. */ target_terminal_ours_for_output (); PSYMTAB_TO_SYMTAB (pst); } if (pst->readin) { /* Checking whether the msymbol has a larger value is for the "pathological" case mentioned in print_frame_info. */ if (inlining_flag) f = find_pc_sect_function (mapped_pc, section); else f = find_pc_sect_function_no_inlined (mapped_pc, section); /* APPLE LOCAL begin address ranges */ if (f != NULL && (msymbol == NULL || (BLOCK_LOWEST_PC (SYMBOL_BLOCK_VALUE (f)) >= SYMBOL_VALUE_ADDRESS (msymbol)))) { cache_pc_function_low = BLOCK_LOWEST_PC (SYMBOL_BLOCK_VALUE (f)); if (BLOCK_RANGES (SYMBOL_BLOCK_VALUE (f))) cache_pc_function_high = BLOCK_HIGHEST_PC (SYMBOL_BLOCK_VALUE (f)); else cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f)); /* APPLE LOCAL end address ranges */ cache_pc_function_name = DEPRECATED_SYMBOL_NAME (f); cache_pc_function_section = section; goto return_cached_value; } } else { /* Now that static symbols go in the minimal symbol table, perhaps we could just ignore the partial symbols. But at least for now we use the partial or minimal symbol, whichever is larger. */ psb = find_pc_sect_psymbol (pst, mapped_pc, section); if (psb && (msymbol == NULL || (SYMBOL_VALUE_ADDRESS (psb) >= SYMBOL_VALUE_ADDRESS (msymbol)))) { /* This case isn't being cached currently. */ if (address) *address = SYMBOL_VALUE_ADDRESS (psb); if (name) *name = DEPRECATED_SYMBOL_NAME (psb); /* endaddr non-NULL can't happen here. */ return 1; } } } /* Not in the normal symbol tables, see if the pc is in a known section. If it's not, then give up. This ensures that anything beyond the end of the text seg doesn't appear to be part of the last function in the text segment. */ osect = find_pc_sect_section (mapped_pc, section); if (!osect) msymbol = NULL; /* Must be in the minimal symbol table. */ if (msymbol == NULL) { /* No available symbol. */ if (name != NULL) *name = 0; if (address != NULL) *address = 0; if (endaddr != NULL) *endaddr = 0; return 0; } cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol); cache_pc_function_name = DEPRECATED_SYMBOL_NAME (msymbol); cache_pc_function_section = section; /* Use the lesser of the next minimal symbol in the same section, or the end of the section, as the end of the function. */ /* Step over other symbols at this same address, and symbols in other sections, to find the next symbol in this section with a different address. */ for (i = 1; DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL; i++) { if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol) && SYMBOL_BFD_SECTION (msymbol + i) == SYMBOL_BFD_SECTION (msymbol)) break; } if (DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr) cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i); else /* We got the start address from the last msymbol in the objfile. So the end address is the end of the section. */ cache_pc_function_high = osect->endaddr; return_cached_value: if (address) { if (pc_in_unmapped_range (pc, section)) *address = overlay_unmapped_address (cache_pc_function_low, section); else *address = cache_pc_function_low; } if (name) *name = cache_pc_function_name; if (endaddr) { if (pc_in_unmapped_range (pc, section)) { /* Because the high address is actually beyond the end of the function (and therefore possibly beyond the end of the overlay), we must actually convert (high - 1) and then add one to that. */ *endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1, section); } else *endaddr = cache_pc_function_high; } return 1; }
int find_pc_sect_partial_function (CORE_ADDR pc, asection *section, char **name, CORE_ADDR *address, CORE_ADDR *endaddr) { struct partial_symtab *pst; struct symbol *f; struct minimal_symbol *msymbol; struct partial_symbol *psb; struct obj_section *osect; int i; CORE_ADDR mapped_pc; mapped_pc = overlay_mapped_address (pc, section); if (mapped_pc >= cache_pc_function_low && mapped_pc < cache_pc_function_high && section == cache_pc_function_section) goto return_cached_value; /* If sigtramp is in the u area, it counts as a function (especially important for step_1). */ if (SIGTRAMP_START_P () && PC_IN_SIGTRAMP (mapped_pc, (char *) NULL)) { cache_pc_function_low = SIGTRAMP_START (mapped_pc); cache_pc_function_high = SIGTRAMP_END (mapped_pc); cache_pc_function_name = "<sigtramp>"; cache_pc_function_section = section; goto return_cached_value; } msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section); pst = find_pc_sect_psymtab (mapped_pc, section); if (pst) { /* Need to read the symbols to get a good value for the end address. */ if (endaddr != NULL && !pst->readin) { /* Need to get the terminal in case symbol-reading produces output. */ target_terminal_ours_for_output (); PSYMTAB_TO_SYMTAB (pst); } if (pst->readin) { /* Checking whether the msymbol has a larger value is for the "pathological" case mentioned in print_frame_info. */ f = find_pc_sect_function (mapped_pc, section); if (f != NULL && (msymbol == NULL || (BLOCK_START (SYMBOL_BLOCK_VALUE (f)) >= SYMBOL_VALUE_ADDRESS (msymbol)))) { cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f)); cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f)); cache_pc_function_name = DEPRECATED_SYMBOL_NAME (f); cache_pc_function_section = section; goto return_cached_value; } } else { /* Now that static symbols go in the minimal symbol table, perhaps we could just ignore the partial symbols. But at least for now we use the partial or minimal symbol, whichever is larger. */ psb = find_pc_sect_psymbol (pst, mapped_pc, section); if (psb && (msymbol == NULL || (SYMBOL_VALUE_ADDRESS (psb) >= SYMBOL_VALUE_ADDRESS (msymbol)))) { /* This case isn't being cached currently. */ if (address) *address = SYMBOL_VALUE_ADDRESS (psb); if (name) *name = DEPRECATED_SYMBOL_NAME (psb); /* endaddr non-NULL can't happen here. */ return 1; } } } /* Not in the normal symbol tables, see if the pc is in a known section. If it's not, then give up. This ensures that anything beyond the end of the text seg doesn't appear to be part of the last function in the text segment. */ osect = find_pc_sect_section (mapped_pc, section); if (!osect) msymbol = NULL; /* Must be in the minimal symbol table. */ if (msymbol == NULL) { /* No available symbol. */ if (name != NULL) *name = 0; if (address != NULL) *address = 0; if (endaddr != NULL) *endaddr = 0; return 0; } cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol); cache_pc_function_name = DEPRECATED_SYMBOL_NAME (msymbol); cache_pc_function_section = section; /* Use the lesser of the next minimal symbol in the same section, or the end of the section, as the end of the function. */ /* Step over other symbols at this same address, and symbols in other sections, to find the next symbol in this section with a different address. */ for (i = 1; DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL; i++) { if (SYMBOL_VALUE_ADDRESS (msymbol + i) != SYMBOL_VALUE_ADDRESS (msymbol) && SYMBOL_BFD_SECTION (msymbol + i) == SYMBOL_BFD_SECTION (msymbol)) break; } if (DEPRECATED_SYMBOL_NAME (msymbol + i) != NULL && SYMBOL_VALUE_ADDRESS (msymbol + i) < osect->endaddr) cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i); else /* We got the start address from the last msymbol in the objfile. So the end address is the end of the section. */ cache_pc_function_high = osect->endaddr; return_cached_value: if (address) { if (pc_in_unmapped_range (pc, section)) *address = overlay_unmapped_address (cache_pc_function_low, section); else *address = cache_pc_function_low; } if (name) *name = cache_pc_function_name; if (endaddr) { if (pc_in_unmapped_range (pc, section)) { /* Because the high address is actually beyond the end of the function (and therefore possibly beyond the end of the overlay), we must actually convert (high - 1) and then add one to that. */ *endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1, section); } else *endaddr = cache_pc_function_high; } return 1; }