1 // SPDX-License-Identifier: GPL-2.0 2 #include <elfutils/libdwfl.h> 3 #include "../../util/unwind-libdw.h" 4 #include "../../util/perf_regs.h" 5 #include "../../util/event.h" 6 7 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg) 8 { 9 struct unwind_info *ui = arg; 10 struct regs_dump *user_regs = &ui->sample->user_regs; 11 Dwarf_Word dwarf_regs[PERF_REG_ARM64_MAX], dwarf_pc; 12 13 #define REG(r) ({ \ 14 Dwarf_Word val = 0; \ 15 perf_reg_value(&val, user_regs, PERF_REG_ARM64_##r); \ 16 val; \ 17 }) 18 19 dwarf_regs[0] = REG(X0); 20 dwarf_regs[1] = REG(X1); 21 dwarf_regs[2] = REG(X2); 22 dwarf_regs[3] = REG(X3); 23 dwarf_regs[4] = REG(X4); 24 dwarf_regs[5] = REG(X5); 25 dwarf_regs[6] = REG(X6); 26 dwarf_regs[7] = REG(X7); 27 dwarf_regs[8] = REG(X8); 28 dwarf_regs[9] = REG(X9); 29 dwarf_regs[10] = REG(X10); 30 dwarf_regs[11] = REG(X11); 31 dwarf_regs[12] = REG(X12); 32 dwarf_regs[13] = REG(X13); 33 dwarf_regs[14] = REG(X14); 34 dwarf_regs[15] = REG(X15); 35 dwarf_regs[16] = REG(X16); 36 dwarf_regs[17] = REG(X17); 37 dwarf_regs[18] = REG(X18); 38 dwarf_regs[19] = REG(X19); 39 dwarf_regs[20] = REG(X20); 40 dwarf_regs[21] = REG(X21); 41 dwarf_regs[22] = REG(X22); 42 dwarf_regs[23] = REG(X23); 43 dwarf_regs[24] = REG(X24); 44 dwarf_regs[25] = REG(X25); 45 dwarf_regs[26] = REG(X26); 46 dwarf_regs[27] = REG(X27); 47 dwarf_regs[28] = REG(X28); 48 dwarf_regs[29] = REG(X29); 49 dwarf_regs[30] = REG(LR); 50 dwarf_regs[31] = REG(SP); 51 52 if (!dwfl_thread_state_registers(thread, 0, PERF_REG_ARM64_MAX, 53 dwarf_regs)) 54 return false; 55 56 dwarf_pc = REG(PC); 57 dwfl_thread_state_register_pc(thread, dwarf_pc); 58 59 return true; 60 } 61