arm/util/unwind-libdw.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <elfutils/libdwfl.h>
0003 #include "../../../util/unwind-libdw.h"
0004 #include "../../../util/perf_regs.h"
0005 #include "../../../util/event.h"
0006
0007 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
0008 {
0009     struct unwind_info *ui = arg;
0010     struct regs_dump *user_regs = &ui->sample->user_regs;
0011     Dwarf_Word dwarf_regs[PERF_REG_ARM_MAX];
0012
0013 #define REG(r) ({                       \
0014     Dwarf_Word val = 0;                 \
0015     perf_reg_value(&val, user_regs, PERF_REG_ARM_##r);  \
0016     val;                            \
0017 })
0018
0019     dwarf_regs[0]  = REG(R0);
0020     dwarf_regs[1]  = REG(R1);
0021     dwarf_regs[2]  = REG(R2);
0022     dwarf_regs[3]  = REG(R3);
0023     dwarf_regs[4]  = REG(R4);
0024     dwarf_regs[5]  = REG(R5);
0025     dwarf_regs[6]  = REG(R6);
0026     dwarf_regs[7]  = REG(R7);
0027     dwarf_regs[8]  = REG(R8);
0028     dwarf_regs[9]  = REG(R9);
0029     dwarf_regs[10] = REG(R10);
0030     dwarf_regs[11] = REG(FP);
0031     dwarf_regs[12] = REG(IP);
0032     dwarf_regs[13] = REG(SP);
0033     dwarf_regs[14] = REG(LR);
0034     dwarf_regs[15] = REG(PC);
0035
0036     return dwfl_thread_state_registers(thread, 0, PERF_REG_ARM_MAX,
0037                        dwarf_regs);
0038 }