87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/*
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Copyright (C) 2009 Red Hat Inc.
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Copyright (C) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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*/
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#include <malloc.h>
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#include <stdio.h>
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#include <string.h>
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#include "dutil.h"
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#include "elf_symtab.h"
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#define HASHSYMS__BITS 8
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#define HASHSYMS__SIZE (1UL << HASHSYMS__BITS)
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struct elf_symtab *elf_symtab__new(const char *name, Elf *elf, GElf_Ehdr *ehdr)
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{
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if (name == NULL)
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name = ".symtab";
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GElf_Shdr shdr;
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Elf_Scn *sec = elf_section_by_name(elf, ehdr, &shdr, name);
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if (sec == NULL)
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return NULL;
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if (gelf_getshdr(sec, &shdr) == NULL)
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return NULL;
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struct elf_symtab *self = malloc(sizeof(*self));
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if (self == NULL)
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return NULL;
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self->name = strdup(name);
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if (self->name == NULL)
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goto out_delete;
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self->syms = elf_getdata(sec, NULL);
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if (self->syms == NULL)
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goto out_free_name;
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sec = elf_getscn(elf, shdr.sh_link);
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if (sec == NULL)
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goto out_free_name;
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self->symstrs = elf_getdata(sec, NULL);
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if (self->symstrs == NULL)
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goto out_free_name;
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self->nr_syms = shdr.sh_size / shdr.sh_entsize;
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return self;
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out_free_name:
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free(self->name);
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out_delete:
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free(self);
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return NULL;
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}
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void elf_symtab__delete(struct elf_symtab *self)
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{
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free(self);
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}
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bool elf_symtab__is_local_function(struct elf_symtab *self,
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GElf_Sym *sym)
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{
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if (elf_sym__type(sym) != STT_OBJECT)
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return false;
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if (sym->st_shndx == SHN_ABS &&
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sym->st_value == 0)
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return false;
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if (sym->st_name == 0)
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return false;
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if (sym->st_shndx == SHN_UNDEF)
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return false;
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const char *name = elf_sym__name(sym, self);
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if (!strcmp(name, "_START_") || !strcmp(name, "_END_"))
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return false;
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return true;
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}
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