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87b7292aa5
drgn is currently licensed as GPLv3+. Part of the long term vision for drgn is that other projects can use it as a library providing programmatic interfaces for debugger functionality. A more permissive license is better suited to this goal. We decided on LGPLv2.1+ as a good balance between software freedom and permissiveness. All contributors not employed by Meta were contacted via email and consented to the license change. The only exception was the author of commitc4fbf7e589("libdrgn: fix for compilation error"), who did not respond. That commit reverted a single line of code to one originally written by me in commit640b1c011d("libdrgn: embed DWARF index in DWARF info cache"). Signed-off-by: Omar Sandoval <osandov@osandov.com>
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: LGPL-2.1-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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