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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/perf/arch/arm64/util/unwind-libdw.c
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// SPDX-License-Identifier: GPL-2.0

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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[PERF_REG_ARM64_MAX], dwarf_pc;

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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_ARM64_##r);	\

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	val;							\

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})

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	dwarf_regs[0]  = REG(X0);

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	dwarf_regs[1]  = REG(X1);

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	dwarf_regs[2]  = REG(X2);

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	dwarf_regs[3]  = REG(X3);

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	dwarf_regs[4]  = REG(X4);

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	dwarf_regs[5]  = REG(X5);

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	dwarf_regs[6]  = REG(X6);

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	dwarf_regs[7]  = REG(X7);

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	dwarf_regs[8]  = REG(X8);

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	dwarf_regs[9]  = REG(X9);

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	dwarf_regs[10] = REG(X10);

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	dwarf_regs[11] = REG(X11);

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	dwarf_regs[12] = REG(X12);

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	dwarf_regs[13] = REG(X13);

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	dwarf_regs[14] = REG(X14);

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	dwarf_regs[15] = REG(X15);

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	dwarf_regs[16] = REG(X16);

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	dwarf_regs[17] = REG(X17);

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	dwarf_regs[18] = REG(X18);

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	dwarf_regs[19] = REG(X19);

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	dwarf_regs[20] = REG(X20);

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	dwarf_regs[21] = REG(X21);

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	dwarf_regs[22] = REG(X22);

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	dwarf_regs[23] = REG(X23);

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	dwarf_regs[24] = REG(X24);

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	dwarf_regs[25] = REG(X25);

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	dwarf_regs[26] = REG(X26);

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	dwarf_regs[27] = REG(X27);

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	dwarf_regs[28] = REG(X28);

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	dwarf_regs[29] = REG(X29);

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	dwarf_regs[30] = REG(LR);

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	dwarf_regs[31] = REG(SP);

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	if (!dwfl_thread_state_registers(thread, 0, PERF_REG_ARM64_MAX,

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					 dwarf_regs))

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		return false;

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	dwarf_pc = REG(PC);

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	dwfl_thread_state_register_pc(thread, dwarf_pc);

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	return true;

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}

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