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