137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Mapping of DWARF debug register numbers into register names.
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*
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* Copyright (C) 2010 Ian Munsie, IBM Corporation.
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*/
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#include <errno.h>
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#include <dwarf-regs.h>
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#include "../../../arch/powerpc/include/uapi/asm/perf_regs.h"
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#define PPC_OP(op) (((op) >> 26) & 0x3F)
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#define PPC_RA(a) (((a) >> 16) & 0x1f)
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#define PPC_RT(t) (((t) >> 21) & 0x1f)
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#define PPC_RB(b) (((b) >> 11) & 0x1f)
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#define PPC_D(D) ((D) & 0xfffe)
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#define PPC_DS(DS) ((DS) & 0xfffc)
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#define OP_LD 58
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#define OP_STD 62
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static int get_source_reg(u32 raw_insn)
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{
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return PPC_RA(raw_insn);
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}
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static int get_target_reg(u32 raw_insn)
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{
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return PPC_RT(raw_insn);
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}
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static int get_offset_opcode(u32 raw_insn)
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{
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int opcode = PPC_OP(raw_insn);
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/* DS- form */
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if ((opcode == OP_LD) || (opcode == OP_STD))
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return PPC_DS(raw_insn);
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else
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return PPC_D(raw_insn);
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}
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/*
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* Fills the required fields for op_loc depending on if it
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* is a source or target.
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* D form: ins RT,D(RA) -> src_reg1 = RA, offset = D, dst_reg1 = RT
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* DS form: ins RT,DS(RA) -> src_reg1 = RA, offset = DS, dst_reg1 = RT
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* X form: ins RT,RA,RB -> src_reg1 = RA, src_reg2 = RB, dst_reg1 = RT
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*/
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void get_powerpc_regs(u32 raw_insn, int is_source,
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struct annotated_op_loc *op_loc)
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{
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if (is_source)
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op_loc->reg1 = get_source_reg(raw_insn);
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else
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op_loc->reg1 = get_target_reg(raw_insn);
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if (op_loc->multi_regs)
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op_loc->reg2 = PPC_RB(raw_insn);
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/* TODO: Implement offset handling for X Form */
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if ((op_loc->mem_ref) && (PPC_OP(raw_insn) != 31))
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op_loc->offset = get_offset_opcode(raw_insn);
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}
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int __get_dwarf_regnum_for_perf_regnum_powerpc(int perf_regnum)
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{
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static const int dwarf_powerpc_regnums[] = {
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[PERF_REG_POWERPC_R0] = 0,
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[PERF_REG_POWERPC_R1] = 1,
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[PERF_REG_POWERPC_R2] = 2,
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[PERF_REG_POWERPC_R3] = 3,
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[PERF_REG_POWERPC_R4] = 4,
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[PERF_REG_POWERPC_R5] = 5,
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[PERF_REG_POWERPC_R6] = 6,
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[PERF_REG_POWERPC_R7] = 7,
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[PERF_REG_POWERPC_R8] = 8,
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[PERF_REG_POWERPC_R9] = 9,
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[PERF_REG_POWERPC_R10] = 10,
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[PERF_REG_POWERPC_R11] = 11,
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[PERF_REG_POWERPC_R12] = 12,
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[PERF_REG_POWERPC_R13] = 13,
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[PERF_REG_POWERPC_R14] = 14,
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[PERF_REG_POWERPC_R15] = 15,
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[PERF_REG_POWERPC_R16] = 16,
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[PERF_REG_POWERPC_R17] = 17,
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[PERF_REG_POWERPC_R18] = 18,
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[PERF_REG_POWERPC_R19] = 19,
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[PERF_REG_POWERPC_R20] = 20,
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[PERF_REG_POWERPC_R21] = 21,
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[PERF_REG_POWERPC_R22] = 22,
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[PERF_REG_POWERPC_R23] = 23,
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[PERF_REG_POWERPC_R24] = 24,
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[PERF_REG_POWERPC_R25] = 25,
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[PERF_REG_POWERPC_R26] = 26,
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[PERF_REG_POWERPC_R27] = 27,
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[PERF_REG_POWERPC_R28] = 28,
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[PERF_REG_POWERPC_R29] = 29,
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[PERF_REG_POWERPC_R30] = 30,
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[PERF_REG_POWERPC_R31] = 31,
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/* TODO: PERF_REG_POWERPC_NIP */
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[PERF_REG_POWERPC_MSR] = 66,
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/* TODO: PERF_REG_POWERPC_ORIG_R3 */
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[PERF_REG_POWERPC_CTR] = 109,
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[PERF_REG_POWERPC_LINK] = 108, /* Note, previously in perf encoded as 65? */
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[PERF_REG_POWERPC_XER] = 101,
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/* TODO: PERF_REG_POWERPC_CCR */
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/* TODO: PERF_REG_POWERPC_SOFTE */
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/* TODO: PERF_REG_POWERPC_TRAP */
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/* TODO: PERF_REG_POWERPC_DAR */
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/* TODO: PERF_REG_POWERPC_DSISR */
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/* TODO: PERF_REG_POWERPC_SIER */
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/* TODO: PERF_REG_POWERPC_MMCRA */
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/* TODO: PERF_REG_POWERPC_MMCR0 */
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/* TODO: PERF_REG_POWERPC_MMCR1 */
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/* TODO: PERF_REG_POWERPC_MMCR2 */
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/* TODO: PERF_REG_POWERPC_MMCR3 */
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/* TODO: PERF_REG_POWERPC_SIER2 */
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/* TODO: PERF_REG_POWERPC_SIER3 */
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/* TODO: PERF_REG_POWERPC_PMC1 */
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/* TODO: PERF_REG_POWERPC_PMC2 */
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/* TODO: PERF_REG_POWERPC_PMC3 */
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/* TODO: PERF_REG_POWERPC_PMC4 */
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/* TODO: PERF_REG_POWERPC_PMC5 */
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/* TODO: PERF_REG_POWERPC_PMC6 */
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/* TODO: PERF_REG_POWERPC_SDAR */
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/* TODO: PERF_REG_POWERPC_SIAR */
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};
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if (perf_regnum == 0)
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return 0;
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if (perf_regnum < 0 || perf_regnum > (int)ARRAY_SIZE(dwarf_powerpc_regnums) ||
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dwarf_powerpc_regnums[perf_regnum] == 0)
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return -ENOENT;
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return dwarf_powerpc_regnums[perf_regnum];
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}
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