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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/perf/arch/riscv/util/unwind-libdw.c
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// SPDX-License-Identifier: GPL-2.0

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/* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */

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#include <elfutils/libdwfl.h>

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#include "perf_regs.h"

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#include "../../util/unwind-libdw.h"

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#include "../../util/perf_regs.h"

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#include "../../util/sample.h"

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bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)

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{

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	struct unwind_info *ui = arg;

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	struct regs_dump *user_regs = perf_sample__user_regs(ui->sample);

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	Dwarf_Word dwarf_regs[32];

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#define REG(r) ({						\

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	Dwarf_Word val = 0;					\

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	perf_reg_value(&val, user_regs, PERF_REG_RISCV_##r);	\

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	val;							\

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})

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	dwarf_regs[0]  = 0;

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	dwarf_regs[1]  = REG(RA);

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	dwarf_regs[2]  = REG(SP);

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	dwarf_regs[3]  = REG(GP);

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	dwarf_regs[4]  = REG(TP);

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	dwarf_regs[5]  = REG(T0);

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	dwarf_regs[6]  = REG(T1);

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	dwarf_regs[7]  = REG(T2);

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	dwarf_regs[8]  = REG(S0);

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	dwarf_regs[9]  = REG(S1);

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	dwarf_regs[10] = REG(A0);

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	dwarf_regs[11] = REG(A1);

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	dwarf_regs[12] = REG(A2);

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	dwarf_regs[13] = REG(A3);

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	dwarf_regs[14] = REG(A4);

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	dwarf_regs[15] = REG(A5);

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	dwarf_regs[16] = REG(A6);

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	dwarf_regs[17] = REG(A7);

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	dwarf_regs[18] = REG(S2);

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	dwarf_regs[19] = REG(S3);

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	dwarf_regs[20] = REG(S4);

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	dwarf_regs[21] = REG(S5);

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	dwarf_regs[22] = REG(S6);

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	dwarf_regs[23] = REG(S7);

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	dwarf_regs[24] = REG(S8);

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	dwarf_regs[25] = REG(S9);

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	dwarf_regs[26] = REG(S10);

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	dwarf_regs[27] = REG(S11);

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	dwarf_regs[28] = REG(T3);

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	dwarf_regs[29] = REG(T4);

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	dwarf_regs[30] = REG(T5);

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	dwarf_regs[31] = REG(T6);

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	dwfl_thread_state_register_pc(thread, REG(PC));

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	return dwfl_thread_state_registers(thread, 0, PERF_REG_RISCV_MAX,

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					   dwarf_regs);

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}

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