diff options
Diffstat (limited to 'fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/aot/debug/elf_parser.c')
-rw-r--r-- | fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/aot/debug/elf_parser.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/aot/debug/elf_parser.c b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/aot/debug/elf_parser.c new file mode 100644 index 000000000..9fec281d3 --- /dev/null +++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/aot/debug/elf_parser.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2021 Ant Group. All rights reserved. + * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + */ + +#include <stdio.h> +#include <assert.h> +#include <fcntl.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <stdbool.h> + +#include "elf.h" + +#include "aot_runtime.h" +#include "bh_log.h" +#include "elf_parser.h" + +bool +is_ELF(void *buf) +{ + Elf32_Ehdr *eh = (Elf32_Ehdr *)buf; + if (!strncmp((char *)eh->e_ident, "\177ELF", 4)) { + LOG_VERBOSE("the buffer is ELF entry!"); + return true; + } + LOG_VERBOSE("the buffer is not ELF entry!"); + return false; +} + +static bool +is64Bit(Elf32_Ehdr *eh) +{ + if (eh->e_ident[EI_CLASS] == ELFCLASS64) + return true; + else + return false; +} + +static bool +is32Bit(Elf32_Ehdr *eh) +{ + if (eh->e_ident[EI_CLASS] == ELFCLASS32) + return true; + else + return false; +} + +bool +is_ELF64(void *buf) +{ + Elf64_Ehdr *eh = (Elf64_Ehdr *)buf; + if (!strncmp((char *)eh->e_ident, "\177ELF", 4)) { + LOG_VERBOSE("the buffer is ELF entry!"); + return true; + } + LOG_VERBOSE("the buffer is not ELF entry!"); + return false; +} + +static void +read_section_header_table(Elf32_Ehdr *eh, Elf32_Shdr *sh_table[]) +{ + uint32_t i; + char *buf = (char *)eh; + buf += eh->e_shoff; + LOG_VERBOSE("str index = %d count=%d", eh->e_shstrndx, eh->e_shnum); + for (i = 0; i < eh->e_shnum; i++) { + sh_table[i] = (Elf32_Shdr *)buf; + buf += eh->e_shentsize; + } +} + +static void +read_section_header_table64(Elf64_Ehdr *eh, Elf64_Shdr *sh_table[]) +{ + uint32_t i; + char *buf = (char *)eh; + buf += eh->e_shoff; + + for (i = 0; i < eh->e_shnum; i++) { + sh_table[i] = (Elf64_Shdr *)buf; + buf += eh->e_shentsize; + } +} + +static char * +get_section(Elf32_Ehdr *eh, Elf32_Shdr *section_header) +{ + char *buf = (char *)eh; + return buf + section_header->sh_offset; +} + +static char * +get_section64(Elf64_Ehdr *eh, Elf64_Shdr *section_header) +{ + char *buf = (char *)eh; + return buf + section_header->sh_offset; +} + +bool +get_text_section(void *buf, uint64_t *offset, uint64_t *size) +{ + bool ret = false; + uint32 i; + char *sh_str; + + if (is64Bit(buf)) { + Elf64_Ehdr *eh = (Elf64_Ehdr *)buf; + Elf64_Shdr **sh_table = + wasm_runtime_malloc(eh->e_shnum * sizeof(Elf64_Shdr *)); + if (sh_table) { + read_section_header_table64(eh, sh_table); + sh_str = get_section64(eh, sh_table[eh->e_shstrndx]); + for (i = 0; i < eh->e_shnum; i++) { + if (!strcmp(sh_str + sh_table[i]->sh_name, ".text")) { + *offset = sh_table[i]->sh_offset; + *size = sh_table[i]->sh_size; + sh_table[i]->sh_addr = + (Elf64_Addr)(uintptr_t)((char *)buf + + sh_table[i]->sh_offset); + ret = true; + break; + } + } + wasm_runtime_free(sh_table); + } + } + else if (is32Bit(buf)) { + Elf32_Ehdr *eh = (Elf32_Ehdr *)buf; + Elf32_Shdr **sh_table = + wasm_runtime_malloc(eh->e_shnum * sizeof(Elf32_Shdr *)); + if (sh_table) { + read_section_header_table(eh, sh_table); + sh_str = get_section(eh, sh_table[eh->e_shstrndx]); + for (i = 0; i < eh->e_shnum; i++) { + if (!strcmp(sh_str + sh_table[i]->sh_name, ".text")) { + *offset = sh_table[i]->sh_offset; + *size = sh_table[i]->sh_size; + sh_table[i]->sh_addr = + (Elf32_Addr)(uintptr_t)((char *)buf + + sh_table[i]->sh_offset); + ret = true; + break; + } + } + wasm_runtime_free(sh_table); + } + } + + return ret; +} |