1 // SPDX-License-Identifier: GPL-2.0 2 #include <elfutils/libdwfl.h> 3 #include "perf_regs.h" 4 #include "../../../util/unwind-libdw.h" 5 #include "../../../util/perf_regs.h" 6 #include "util/sample.h" 7 8 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) 9 { 10 struct unwind_info *ui = arg; 11 struct regs_dump *user_regs = &ui->sample->user_regs; 12 Dwarf_Word dwarf_regs[17]; 13 unsigned nregs; 14 15 #define REG(r) ({ \ 16 Dwarf_Word val = 0; \ 17 perf_reg_value(&val, user_regs, PERF_REG_X86_##r); \ 18 val; \ 19 }) 20 21 if (user_regs->abi == PERF_SAMPLE_REGS_ABI_32) { 22 dwarf_regs[0] = REG(AX); 23 dwarf_regs[1] = REG(CX); 24 dwarf_regs[2] = REG(DX); 25 dwarf_regs[3] = REG(BX); 26 dwarf_regs[4] = REG(SP); 27 dwarf_regs[5] = REG(BP); 28 dwarf_regs[6] = REG(SI); 29 dwarf_regs[7] = REG(DI); 30 dwarf_regs[8] = REG(IP); 31 nregs = 9; 32 } else { 33 dwarf_regs[0] = REG(AX); 34 dwarf_regs[1] = REG(DX); 35 dwarf_regs[2] = REG(CX); 36 dwarf_regs[3] = REG(BX); 37 dwarf_regs[4] = REG(SI); 38 dwarf_regs[5] = REG(DI); 39 dwarf_regs[6] = REG(BP); 40 dwarf_regs[7] = REG(SP); 41 dwarf_regs[8] = REG(R8); 42 dwarf_regs[9] = REG(R9); 43 dwarf_regs[10] = REG(R10); 44 dwarf_regs[11] = REG(R11); 45 dwarf_regs[12] = REG(R12); 46 dwarf_regs[13] = REG(R13); 47 dwarf_regs[14] = REG(R14); 48 dwarf_regs[15] = REG(R15); 49 dwarf_regs[16] = REG(IP); 50 nregs = 17; 51 } 52 53 return dwfl_thread_state_registers(thread, 0, nregs, dwarf_regs); 54 } 55