mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
![Tiezhu Yang](/assets/img/avatar_default.png)
Move init_orc_entry(), write_orc_entry(), reg_name(), orc_type_name() and print_reg() from generic orc_gen.c and orc_dump.c to arch-specific orc.c, then introduce a new function orc_print_dump() to print info. This is preparation for later patch, no functionality change. Co-developed-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Jinyang He <hejinyang@loongson.cn> Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
161 lines
3.2 KiB
C
161 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
|
|
*/
|
|
|
|
#include <unistd.h>
|
|
#include <asm/orc_types.h>
|
|
#include <objtool/objtool.h>
|
|
#include <objtool/orc.h>
|
|
#include <objtool/warn.h>
|
|
#include <objtool/endianness.h>
|
|
|
|
int orc_dump(const char *_objname)
|
|
{
|
|
int fd, nr_entries, i, *orc_ip = NULL, orc_size = 0;
|
|
struct orc_entry *orc = NULL;
|
|
char *name;
|
|
size_t nr_sections;
|
|
Elf64_Addr orc_ip_addr = 0;
|
|
size_t shstrtab_idx, strtab_idx = 0;
|
|
Elf *elf;
|
|
Elf_Scn *scn;
|
|
GElf_Shdr sh;
|
|
GElf_Rela rela;
|
|
GElf_Sym sym;
|
|
Elf_Data *data, *symtab = NULL, *rela_orc_ip = NULL;
|
|
struct elf dummy_elf = {};
|
|
|
|
|
|
objname = _objname;
|
|
|
|
elf_version(EV_CURRENT);
|
|
|
|
fd = open(objname, O_RDONLY);
|
|
if (fd == -1) {
|
|
perror("open");
|
|
return -1;
|
|
}
|
|
|
|
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
|
|
if (!elf) {
|
|
WARN_ELF("elf_begin");
|
|
return -1;
|
|
}
|
|
|
|
if (!elf64_getehdr(elf)) {
|
|
WARN_ELF("elf64_getehdr");
|
|
return -1;
|
|
}
|
|
memcpy(&dummy_elf.ehdr, elf64_getehdr(elf), sizeof(dummy_elf.ehdr));
|
|
|
|
if (elf_getshdrnum(elf, &nr_sections)) {
|
|
WARN_ELF("elf_getshdrnum");
|
|
return -1;
|
|
}
|
|
|
|
if (elf_getshdrstrndx(elf, &shstrtab_idx)) {
|
|
WARN_ELF("elf_getshdrstrndx");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < nr_sections; i++) {
|
|
scn = elf_getscn(elf, i);
|
|
if (!scn) {
|
|
WARN_ELF("elf_getscn");
|
|
return -1;
|
|
}
|
|
|
|
if (!gelf_getshdr(scn, &sh)) {
|
|
WARN_ELF("gelf_getshdr");
|
|
return -1;
|
|
}
|
|
|
|
name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
|
|
if (!name) {
|
|
WARN_ELF("elf_strptr");
|
|
return -1;
|
|
}
|
|
|
|
data = elf_getdata(scn, NULL);
|
|
if (!data) {
|
|
WARN_ELF("elf_getdata");
|
|
return -1;
|
|
}
|
|
|
|
if (!strcmp(name, ".symtab")) {
|
|
symtab = data;
|
|
} else if (!strcmp(name, ".strtab")) {
|
|
strtab_idx = i;
|
|
} else if (!strcmp(name, ".orc_unwind")) {
|
|
orc = data->d_buf;
|
|
orc_size = sh.sh_size;
|
|
} else if (!strcmp(name, ".orc_unwind_ip")) {
|
|
orc_ip = data->d_buf;
|
|
orc_ip_addr = sh.sh_addr;
|
|
} else if (!strcmp(name, ".rela.orc_unwind_ip")) {
|
|
rela_orc_ip = data;
|
|
}
|
|
}
|
|
|
|
if (!symtab || !strtab_idx || !orc || !orc_ip)
|
|
return 0;
|
|
|
|
if (orc_size % sizeof(*orc) != 0) {
|
|
WARN("bad .orc_unwind section size");
|
|
return -1;
|
|
}
|
|
|
|
nr_entries = orc_size / sizeof(*orc);
|
|
for (i = 0; i < nr_entries; i++) {
|
|
if (rela_orc_ip) {
|
|
if (!gelf_getrela(rela_orc_ip, i, &rela)) {
|
|
WARN_ELF("gelf_getrela");
|
|
return -1;
|
|
}
|
|
|
|
if (!gelf_getsym(symtab, GELF_R_SYM(rela.r_info), &sym)) {
|
|
WARN_ELF("gelf_getsym");
|
|
return -1;
|
|
}
|
|
|
|
if (GELF_ST_TYPE(sym.st_info) == STT_SECTION) {
|
|
scn = elf_getscn(elf, sym.st_shndx);
|
|
if (!scn) {
|
|
WARN_ELF("elf_getscn");
|
|
return -1;
|
|
}
|
|
|
|
if (!gelf_getshdr(scn, &sh)) {
|
|
WARN_ELF("gelf_getshdr");
|
|
return -1;
|
|
}
|
|
|
|
name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
|
|
if (!name) {
|
|
WARN_ELF("elf_strptr");
|
|
return -1;
|
|
}
|
|
} else {
|
|
name = elf_strptr(elf, strtab_idx, sym.st_name);
|
|
if (!name) {
|
|
WARN_ELF("elf_strptr");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
printf("%s+%llx:", name, (unsigned long long)rela.r_addend);
|
|
|
|
} else {
|
|
printf("%llx:", (unsigned long long)(orc_ip_addr + (i * sizeof(int)) + orc_ip[i]));
|
|
}
|
|
|
|
orc_print_dump(&dummy_elf, orc, i);
|
|
}
|
|
|
|
elf_end(elf);
|
|
close(fd);
|
|
|
|
return 0;
|
|
}
|