s390/util/unwind-libdw.c

0001 #include <linux/kernel.h>
0002 #include <elfutils/libdwfl.h>
0003 #include "../../util/unwind-libdw.h"
0004 #include "../../util/perf_regs.h"
0005 #include "../../util/event.h"
0006 #include "dwarf-regs-table.h"
0007
0008
0009 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
0010 {
0011     struct unwind_info *ui = arg;
0012     struct regs_dump *user_regs = &ui->sample->user_regs;
0013     Dwarf_Word dwarf_regs[ARRAY_SIZE(s390_dwarf_regs)];
0014
0015 #define REG(r) ({                       \
0016     Dwarf_Word val = 0;                 \
0017     perf_reg_value(&val, user_regs, PERF_REG_S390_##r); \
0018     val;                            \
0019 })
0020     /*
0021      * For DWARF register mapping details,
0022      * see also perf/arch/s390/include/dwarf-regs-table.h
0023      */
0024     dwarf_regs[0]  = REG(R0);
0025     dwarf_regs[1]  = REG(R1);
0026     dwarf_regs[2]  = REG(R2);
0027     dwarf_regs[3]  = REG(R3);
0028     dwarf_regs[4]  = REG(R4);
0029     dwarf_regs[5]  = REG(R5);
0030     dwarf_regs[6]  = REG(R6);
0031     dwarf_regs[7]  = REG(R7);
0032     dwarf_regs[8]  = REG(R8);
0033     dwarf_regs[9]  = REG(R9);
0034     dwarf_regs[10] = REG(R10);
0035     dwarf_regs[11] = REG(R11);
0036     dwarf_regs[12] = REG(R12);
0037     dwarf_regs[13] = REG(R13);
0038     dwarf_regs[14] = REG(R14);
0039     dwarf_regs[15] = REG(R15);
0040
0041     dwarf_regs[16] = REG(FP0);
0042     dwarf_regs[17] = REG(FP2);
0043     dwarf_regs[18] = REG(FP4);
0044     dwarf_regs[19] = REG(FP6);
0045     dwarf_regs[20] = REG(FP1);
0046     dwarf_regs[21] = REG(FP3);
0047     dwarf_regs[22] = REG(FP5);
0048     dwarf_regs[23] = REG(FP7);
0049     dwarf_regs[24] = REG(FP8);
0050     dwarf_regs[25] = REG(FP10);
0051     dwarf_regs[26] = REG(FP12);
0052     dwarf_regs[27] = REG(FP14);
0053     dwarf_regs[28] = REG(FP9);
0054     dwarf_regs[29] = REG(FP11);
0055     dwarf_regs[30] = REG(FP13);
0056     dwarf_regs[31] = REG(FP15);
0057
0058     dwarf_regs[64] = REG(MASK);
0059     dwarf_regs[65] = REG(PC);
0060
0061     dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
0062     return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
0063 }