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7970a60818
Currently we can lookup symbols by name or address, but this will only return one symbol, prioritizing the global symbols. However, symbols may share the same name, and symbols may also overlap address ranges, so it's possible for searches to return multiple results. Add functions which can return a list of multiple matching symbols. Signed-off-by: Stephen Brennan <stephen@brennan.io>
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// SPDX-License-Identifier: GPL-3.0-or-later
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#include <elf.h>
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#include <stdlib.h>
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#include <string.h>
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#include "drgn.h"
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#include "symbol.h"
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#include "util.h"
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LIBDRGN_PUBLIC void drgn_symbol_destroy(struct drgn_symbol *sym)
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{
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free(sym);
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}
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LIBDRGN_PUBLIC void drgn_symbols_destroy(struct drgn_symbol **syms,
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size_t count)
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{
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for (size_t i = 0; i < count; i++)
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drgn_symbol_destroy(syms[i]);
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free(syms);
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}
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void drgn_symbol_from_elf(const char *name, uint64_t address,
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const GElf_Sym *elf_sym, struct drgn_symbol *ret)
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{
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ret->name = name;
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ret->address = address;
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ret->size = elf_sym->st_size;
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int binding = GELF_ST_BIND(elf_sym->st_info);
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if (binding <= STB_WEAK || binding == STB_GNU_UNIQUE)
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ret->binding = binding + 1;
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else
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ret->binding = DRGN_SYMBOL_BINDING_UNKNOWN;
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int type = GELF_ST_TYPE(elf_sym->st_info);
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if (type <= STT_TLS || type == STT_GNU_IFUNC)
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ret->kind = type;
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else
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ret->kind = DRGN_SYMBOL_KIND_UNKNOWN;
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}
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LIBDRGN_PUBLIC const char *drgn_symbol_name(struct drgn_symbol *sym)
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{
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return sym->name;
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}
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LIBDRGN_PUBLIC uint64_t drgn_symbol_address(struct drgn_symbol *sym)
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{
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return sym->address;
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}
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LIBDRGN_PUBLIC uint64_t drgn_symbol_size(struct drgn_symbol *sym)
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{
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return sym->size;
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}
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LIBDRGN_PUBLIC enum drgn_symbol_binding
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drgn_symbol_binding(struct drgn_symbol *sym)
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{
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return sym->binding;
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}
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LIBDRGN_PUBLIC enum drgn_symbol_kind drgn_symbol_kind(struct drgn_symbol *sym)
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{
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return sym->kind;
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}
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LIBDRGN_PUBLIC bool drgn_symbol_eq(struct drgn_symbol *a, struct drgn_symbol *b)
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{
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return (strcmp(a->name, b->name) == 0 && a->address == b->address &&
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a->size == b->size && a->binding == b->binding &&
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a->kind == b->kind);
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}
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