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authorHendrik Brueckner <brueckner@linux.vnet.ibm.com>2017-11-08 09:17:38 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-11-16 15:06:15 +0100
commitde9954b75e992d26a67d83990e6219dcb6edc3bf (patch)
treeb3f83b1ce69110268dc4965e47c487bc5325b625 /tools
parent0da0017f72554c005c1a04c3adc5da9eb64fa7e5 (diff)
downloadlinux-de9954b75e992d26a67d83990e6219dcb6edc3bf.tar.bz2
s390/perf: add perf register support for floating-point registers
For correct unwinding of user space processes, the floating-point register contents are required. For example, leaf functions might use fp registers to temporarily store the return address. 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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/arch/s390/include/perf_regs.h32
-rw-r--r--tools/perf/arch/s390/util/unwind-libdw.c20
2 files changed, 51 insertions, 1 deletions
diff --git a/tools/perf/arch/s390/include/perf_regs.h b/tools/perf/arch/s390/include/perf_regs.h
index ac4b8c8c49e2..d2df54a6bc5a 100644
--- a/tools/perf/arch/s390/include/perf_regs.h
+++ b/tools/perf/arch/s390/include/perf_regs.h
@@ -49,6 +49,38 @@ static inline const char *perf_reg_name(int id)
return "R14";
case PERF_REG_S390_R15:
return "R15";
+ case PERF_REG_S390_FP0:
+ return "FP0";
+ case PERF_REG_S390_FP1:
+ return "FP1";
+ case PERF_REG_S390_FP2:
+ return "FP2";
+ case PERF_REG_S390_FP3:
+ return "FP3";
+ case PERF_REG_S390_FP4:
+ return "FP4";
+ case PERF_REG_S390_FP5:
+ return "FP5";
+ case PERF_REG_S390_FP6:
+ return "FP6";
+ case PERF_REG_S390_FP7:
+ return "FP7";
+ case PERF_REG_S390_FP8:
+ return "FP8";
+ case PERF_REG_S390_FP9:
+ return "FP9";
+ case PERF_REG_S390_FP10:
+ return "FP10";
+ case PERF_REG_S390_FP11:
+ return "FP11";
+ case PERF_REG_S390_FP12:
+ return "FP12";
+ case PERF_REG_S390_FP13:
+ return "FP13";
+ case PERF_REG_S390_FP14:
+ return "FP14";
+ case PERF_REG_S390_FP15:
+ return "FP15";
case PERF_REG_S390_MASK:
return "MASK";
case PERF_REG_S390_PC:
diff --git a/tools/perf/arch/s390/util/unwind-libdw.c b/tools/perf/arch/s390/util/unwind-libdw.c
index ba8d98b8b09e..387c698cdd1b 100644
--- a/tools/perf/arch/s390/util/unwind-libdw.c
+++ b/tools/perf/arch/s390/util/unwind-libdw.c
@@ -37,9 +37,27 @@ bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
dwarf_regs[13] = REG(R13);
dwarf_regs[14] = REG(R14);
dwarf_regs[15] = REG(R15);
+
+ dwarf_regs[16] = REG(FP0);
+ dwarf_regs[17] = REG(FP2);
+ dwarf_regs[18] = REG(FP4);
+ dwarf_regs[19] = REG(FP6);
+ dwarf_regs[20] = REG(FP1);
+ dwarf_regs[21] = REG(FP3);
+ dwarf_regs[22] = REG(FP5);
+ dwarf_regs[23] = REG(FP7);
+ dwarf_regs[24] = REG(FP8);
+ dwarf_regs[25] = REG(FP10);
+ dwarf_regs[26] = REG(FP12);
+ dwarf_regs[27] = REG(FP14);
+ dwarf_regs[28] = REG(FP9);
+ dwarf_regs[29] = REG(FP11);
+ dwarf_regs[30] = REG(FP13);
+ dwarf_regs[31] = REG(FP15);
+
dwarf_regs[64] = REG(MASK);
dwarf_regs[65] = REG(PC);
dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
- return dwfl_thread_state_registers(thread, 0, 16, dwarf_regs);
+ return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
}