// SPDX-License-Identifier: GPL-2.0 #include <elfutils/libdwfl.h> #include "../../util/unwind-libdw.h" #include "../../util/perf_regs.h" #include "../../util/event.h" bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) { struct unwind_info *ui = arg; struct regs_dump *user_regs = &ui->sample->user_regs; Dwarf_Word dwarf_regs[17]; unsigned nregs; #define REG(r) ({ \ Dwarf_Word val = 0; \ perf_reg_value(&val, user_regs, PERF_REG_X86_##r); \ val; \ }) if (user_regs->abi == PERF_SAMPLE_REGS_ABI_32) { dwarf_regs[0] = REG(AX); dwarf_regs[1] = REG(CX); dwarf_regs[2] = REG(DX); dwarf_regs[3] = REG(BX); dwarf_regs[4] = REG(SP); dwarf_regs[5] = REG(BP); dwarf_regs[6] = REG(SI); dwarf_regs[7] = REG(DI); dwarf_regs[8] = REG(IP); nregs = 9; } else { dwarf_regs[0] = REG(AX); dwarf_regs[1] = REG(DX); dwarf_regs[2] = REG(CX); dwarf_regs[3] = REG(BX); dwarf_regs[4] = REG(SI); dwarf_regs[5] = REG(DI); dwarf_regs[6] = REG(BP); dwarf_regs[7] = REG(SP); dwarf_regs[8] = REG(R8); dwarf_regs[9] = REG(R9); dwarf_regs[10] = REG(R10); dwarf_regs[11] = REG(R11); dwarf_regs[12] = REG(R12); dwarf_regs[13] = REG(R13); dwarf_regs[14] = REG(R14); dwarf_regs[15] = REG(R15); dwarf_regs[16] = REG(IP); nregs = 17; } return dwfl_thread_state_registers(thread, 0, nregs, dwarf_regs); }