f704ef4460
With support for perf_regs and libdw, you can record and report call graphs for user space programs. Simply invoke perf with the --call-graph=dwarf command line option. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> [brueckner: added dwfl_thread_state_register_pc() call] Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-and-tested-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#include <elfutils/libdwfl.h>
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#include "../../util/unwind-libdw.h"
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#include "../../util/perf_regs.h"
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#include "../../util/event.h"
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bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
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{
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struct unwind_info *ui = arg;
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struct regs_dump *user_regs = &ui->sample->user_regs;
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Dwarf_Word dwarf_regs[PERF_REG_S390_MAX];
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#define REG(r) ({ \
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Dwarf_Word val = 0; \
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perf_reg_value(&val, user_regs, PERF_REG_S390_##r); \
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val; \
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})
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dwarf_regs[0] = REG(R0);
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dwarf_regs[1] = REG(R1);
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dwarf_regs[2] = REG(R2);
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dwarf_regs[3] = REG(R3);
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dwarf_regs[4] = REG(R4);
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dwarf_regs[5] = REG(R5);
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dwarf_regs[6] = REG(R6);
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dwarf_regs[7] = REG(R7);
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dwarf_regs[8] = REG(R8);
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dwarf_regs[9] = REG(R9);
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dwarf_regs[10] = REG(R10);
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dwarf_regs[11] = REG(R11);
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dwarf_regs[12] = REG(R12);
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dwarf_regs[13] = REG(R13);
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dwarf_regs[14] = REG(R14);
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dwarf_regs[15] = REG(R15);
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dwarf_regs[16] = REG(MASK);
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dwarf_regs[17] = REG(PC);
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dwfl_thread_state_register_pc(thread, dwarf_regs[17]);
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return dwfl_thread_state_registers(thread, 0, 16, dwarf_regs);
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}
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