109 lines
1.9 KiB
C
109 lines
1.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <stdio.h>
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#include <stdlib.h>
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#include <objtool/check.h>
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#include <objtool/elf.h>
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#include <objtool/arch.h>
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#include <objtool/warn.h>
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#include <objtool/builtin.h>
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#include <objtool/endianness.h>
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int arch_ftrace_match(char *name)
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{
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return !strcmp(name, "_mcount");
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}
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unsigned long arch_dest_reloc_offset(int addend)
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{
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return addend;
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}
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bool arch_callee_saved_reg(unsigned char reg)
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{
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return false;
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}
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int arch_decode_hint_reg(u8 sp_reg, int *base)
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{
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exit(-1);
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}
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const char *arch_nop_insn(int len)
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{
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exit(-1);
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}
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const char *arch_ret_insn(int len)
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{
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exit(-1);
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}
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int arch_decode_instruction(struct objtool_file *file, const struct section *sec,
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unsigned long offset, unsigned int maxlen,
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struct instruction *insn)
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{
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unsigned int opcode;
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enum insn_type typ;
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unsigned long imm;
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u32 ins;
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ins = bswap_if_needed(file->elf, *(u32 *)(sec->data->d_buf + offset));
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opcode = ins >> 26;
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typ = INSN_OTHER;
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imm = 0;
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switch (opcode) {
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case 18: /* b[l][a] */
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if ((ins & 3) == 1) /* bl */
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typ = INSN_CALL;
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imm = ins & 0x3fffffc;
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if (imm & 0x2000000)
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imm -= 0x4000000;
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break;
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}
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if (opcode == 1)
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insn->len = 8;
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else
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insn->len = 4;
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insn->type = typ;
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insn->immediate = imm;
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return 0;
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}
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unsigned long arch_jump_destination(struct instruction *insn)
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{
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return insn->offset + insn->immediate;
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}
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bool arch_pc_relative_reloc(struct reloc *reloc)
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{
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/*
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* The powerpc build only allows certain relocation types, see
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* relocs_check.sh, and none of those accepted are PC relative.
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*/
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return false;
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}
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void arch_initial_func_cfi_state(struct cfi_init_state *state)
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{
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int i;
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for (i = 0; i < CFI_NUM_REGS; i++) {
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state->regs[i].base = CFI_UNDEFINED;
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state->regs[i].offset = 0;
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}
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/* initial CFA (call frame address) */
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state->cfa.base = CFI_SP;
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state->cfa.offset = 0;
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/* initial LR (return address) */
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state->regs[CFI_RA].base = CFI_CFA;
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state->regs[CFI_RA].offset = 0;
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}
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