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> compile NEMU

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ysyx_22040000 李心杨
Linux calcite 6.6.19 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar  1 12:35:11 UTC 2024 x86_64 GNU/Linux
 01:52:09  up  15:28,  2 users,  load average: 0.54, 0.46, 0.44
This commit is contained in:
tracer-ysyx 2024-03-14 01:52:09 +08:00 • committed by xinyangli
parent 061167cd10
commit 2f1f38a359
3 changed files with 54 additions and 683 deletions
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45
nemu/src/utils/elf-parser.c
View file

@ -1,2 +1,47 @@
#include <common.h>
#include <elf.h>
// Put this into another file
#ifdef CONFIG_FTRACE
// static vaddr_t g_function_stack[CONFIG_FTRACE_STACK_SIZE] = {0};
#endif
#define FAILED_GOTO(tag, exp) do {if((exp)) goto tag;} while(0)
void init_elf(const char *path) {
FILE *elf_file = fopen(path, "rb");
Elf32_Ehdr header;
Elf32_Shdr section_header, *psh;
FAILED_GOTO(failed_nosym, fread(&header, sizeof(Elf32_Ehdr), 1, elf_file) > 0);
FAILED_GOTO(failed_nosym, fseek(elf_file, header.e_shoff, SEEK_SET) != 0);
FAILED_GOTO(failed_nosym, fread(&section_header, header.e_shentsize, header.e_shnum, elf_file) > 0);
Elf32_Shdr *symtab = NULL, *strtab = NULL;
for(int i = 0; i < header.e_shnum; i++) {
psh = &section_header + i;
if (psh->sh_type == SHT_SYMTAB) {
symtab = psh;
} else if (psh->sh_type == SHT_STRTAB) {
strtab = psh;
}
}
int sym_length = symtab->sh_entsize / sizeof(Elf32_Sym);
Elf32_Sym *sym = calloc(sym_length, sizeof(Elf32_Sym));
FAILED_GOTO(failed, fseek(elf_file, symtab->sh_offset, SEEK_SET) != 0);
FAILED_GOTO(failed, fread(&sym, sizeof(Elf32_Sym), sym_length, elf_file) > 0);
for(int j = 0; j < sym_length; j++) {
if(ELF32_ST_TYPE(sym[j].st_info) != STT_FUNC) continue;
// Only read function type symbol
char func[30] = "";
FAILED_GOTO(failed, fseek(elf_file, sym[j].st_name + strtab->sh_offset, SEEK_SET) != 0);
FAILED_GOTO(failed, fgets(func, 30, elf_file) > 0);
puts(func);
}
failed:
free(sym);
failed_nosym:
;
}