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b8e85e6f3a
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>
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <linux/objtool_types.h>
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#include <asm/orc_types.h>
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#include <objtool/check.h>
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#include <objtool/orc.h>
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#include <objtool/warn.h>
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#include <objtool/endianness.h>
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struct orc_list_entry {
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struct list_head list;
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struct orc_entry orc;
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struct section *insn_sec;
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unsigned long insn_off;
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};
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static int orc_list_add(struct list_head *orc_list, struct orc_entry *orc,
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struct section *sec, unsigned long offset)
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{
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struct orc_list_entry *entry = malloc(sizeof(*entry));
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if (!entry) {
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WARN("malloc failed");
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return -1;
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}
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entry->orc = *orc;
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entry->insn_sec = sec;
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entry->insn_off = offset;
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list_add_tail(&entry->list, orc_list);
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return 0;
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}
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static unsigned long alt_group_len(struct alt_group *alt_group)
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{
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return alt_group->last_insn->offset +
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alt_group->last_insn->len -
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alt_group->first_insn->offset;
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}
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int orc_create(struct objtool_file *file)
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{
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struct section *sec, *orc_sec;
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unsigned int nr = 0, idx = 0;
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struct orc_list_entry *entry;
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struct list_head orc_list;
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struct orc_entry null = { .type = ORC_TYPE_UNDEFINED };
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/* Build a deduplicated list of ORC entries: */
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INIT_LIST_HEAD(&orc_list);
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for_each_sec(file, sec) {
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struct orc_entry orc, prev_orc = {0};
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struct instruction *insn;
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bool empty = true;
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if (!sec->text)
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continue;
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sec_for_each_insn(file, sec, insn) {
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struct alt_group *alt_group = insn->alt_group;
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int i;
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if (!alt_group) {
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if (init_orc_entry(&orc, insn->cfi, insn))
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return -1;
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if (!memcmp(&prev_orc, &orc, sizeof(orc)))
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continue;
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if (orc_list_add(&orc_list, &orc, sec,
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insn->offset))
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return -1;
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nr++;
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prev_orc = orc;
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empty = false;
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continue;
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}
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/*
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* Alternatives can have different stack layout
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* possibilities (but they shouldn't conflict).
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* Instead of traversing the instructions, use the
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* alt_group's flattened byte-offset-addressed CFI
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* array.
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*/
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for (i = 0; i < alt_group_len(alt_group); i++) {
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struct cfi_state *cfi = alt_group->cfi[i];
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if (!cfi)
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continue;
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/* errors are reported on the original insn */
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if (init_orc_entry(&orc, cfi, insn))
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return -1;
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if (!memcmp(&prev_orc, &orc, sizeof(orc)))
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continue;
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if (orc_list_add(&orc_list, &orc, insn->sec,
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insn->offset + i))
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return -1;
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nr++;
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prev_orc = orc;
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empty = false;
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}
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/* Skip to the end of the alt_group */
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insn = alt_group->last_insn;
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}
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/* Add a section terminator */
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if (!empty) {
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orc_list_add(&orc_list, &null, sec, sec->sh.sh_size);
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nr++;
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}
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}
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if (!nr)
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return 0;
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/* Create .orc_unwind, .orc_unwind_ip and .rela.orc_unwind_ip sections: */
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sec = find_section_by_name(file->elf, ".orc_unwind");
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if (sec) {
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WARN("file already has .orc_unwind section, skipping");
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return -1;
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}
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orc_sec = elf_create_section(file->elf, ".orc_unwind",
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sizeof(struct orc_entry), nr);
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if (!orc_sec)
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return -1;
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sec = elf_create_section_pair(file->elf, ".orc_unwind_ip", sizeof(int), nr, nr);
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if (!sec)
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return -1;
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/* Write ORC entries to sections: */
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list_for_each_entry(entry, &orc_list, list) {
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if (write_orc_entry(file->elf, orc_sec, sec, idx++,
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entry->insn_sec, entry->insn_off,
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&entry->orc))
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return -1;
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}
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return 0;
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}
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