1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
7 #include <asm/orc_types.h>
11 static const char *reg_name(unsigned int reg)
28 case ORC_REG_BP_INDIRECT:
30 case ORC_REG_SP_INDIRECT:
37 static const char *orc_type_name(unsigned int type)
44 case ORC_TYPE_REGS_IRET:
51 static void print_reg(unsigned int reg, int offset)
53 if (reg == ORC_REG_BP_INDIRECT)
54 printf("(bp%+d)", offset);
55 else if (reg == ORC_REG_SP_INDIRECT)
56 printf("(sp%+d)", offset);
57 else if (reg == ORC_REG_UNDEFINED)
60 printf("%s%+d", reg_name(reg), offset);
63 int orc_dump(const char *_objname)
65 int fd, nr_entries, i, *orc_ip = NULL, orc_size = 0;
66 struct orc_entry *orc = NULL;
69 Elf64_Addr orc_ip_addr = 0;
70 size_t shstrtab_idx, strtab_idx = 0;
76 Elf_Data *data, *symtab = NULL, *rela_orc_ip = NULL;
81 elf_version(EV_CURRENT);
83 fd = open(objname, O_RDONLY);
89 elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
91 WARN_ELF("elf_begin");
95 if (elf_getshdrnum(elf, &nr_sections)) {
96 WARN_ELF("elf_getshdrnum");
100 if (elf_getshdrstrndx(elf, &shstrtab_idx)) {
101 WARN_ELF("elf_getshdrstrndx");
105 for (i = 0; i < nr_sections; i++) {
106 scn = elf_getscn(elf, i);
108 WARN_ELF("elf_getscn");
112 if (!gelf_getshdr(scn, &sh)) {
113 WARN_ELF("gelf_getshdr");
117 name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
119 WARN_ELF("elf_strptr");
123 data = elf_getdata(scn, NULL);
125 WARN_ELF("elf_getdata");
129 if (!strcmp(name, ".symtab")) {
131 } else if (!strcmp(name, ".strtab")) {
133 } else if (!strcmp(name, ".orc_unwind")) {
135 orc_size = sh.sh_size;
136 } else if (!strcmp(name, ".orc_unwind_ip")) {
137 orc_ip = data->d_buf;
138 orc_ip_addr = sh.sh_addr;
139 } else if (!strcmp(name, ".rela.orc_unwind_ip")) {
144 if (!symtab || !strtab_idx || !orc || !orc_ip)
147 if (orc_size % sizeof(*orc) != 0) {
148 WARN("bad .orc_unwind section size");
152 nr_entries = orc_size / sizeof(*orc);
153 for (i = 0; i < nr_entries; i++) {
155 if (!gelf_getrela(rela_orc_ip, i, &rela)) {
156 WARN_ELF("gelf_getrela");
160 if (!gelf_getsym(symtab, GELF_R_SYM(rela.r_info), &sym)) {
161 WARN_ELF("gelf_getsym");
165 if (GELF_ST_TYPE(sym.st_info) == STT_SECTION) {
166 scn = elf_getscn(elf, sym.st_shndx);
168 WARN_ELF("elf_getscn");
172 if (!gelf_getshdr(scn, &sh)) {
173 WARN_ELF("gelf_getshdr");
177 name = elf_strptr(elf, shstrtab_idx, sh.sh_name);
179 WARN_ELF("elf_strptr");
183 name = elf_strptr(elf, strtab_idx, sym.st_name);
185 WARN_ELF("elf_strptr");
190 printf("%s+%llx:", name, (unsigned long long)rela.r_addend);
193 printf("%llx:", (unsigned long long)(orc_ip_addr + (i * sizeof(int)) + orc_ip[i]));
199 print_reg(orc[i].sp_reg, orc[i].sp_offset);
203 print_reg(orc[i].bp_reg, orc[i].bp_offset);
205 printf(" type:%s end:%d\n",
206 orc_type_name(orc[i].type), orc[i].end);