Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / perf / arch / arm / util / unwind-libdw.c

diff --git a/kernel/tools/perf/arch/arm/util/unwind-libdw.c b/kernel/tools/perf/arch/arm/util/unwind-libdw.c
new file mode 100644 (file)
index 0000000..b4176c6
--- /dev/null
+++ b/kernel/tools/perf/arch/arm/util/unwind-libdw.c
@@ -0,0 +1,36 @@
+#include <elfutils/libdwfl.h>
+#include "../../util/unwind-libdw.h"
+#include "../../util/perf_regs.h"
+
+bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
+{
+       struct unwind_info *ui = arg;
+       struct regs_dump *user_regs = &ui->sample->user_regs;
+       Dwarf_Word dwarf_regs[PERF_REG_ARM_MAX];
+
+#define REG(r) ({                                              \
+       Dwarf_Word val = 0;                                     \
+       perf_reg_value(&val, user_regs, PERF_REG_ARM_##r);      \
+       val;                                                    \
+})
+
+       dwarf_regs[0]  = REG(R0);
+       dwarf_regs[1]  = REG(R1);
+       dwarf_regs[2]  = REG(R2);
+       dwarf_regs[3]  = REG(R3);
+       dwarf_regs[4]  = REG(R4);
+       dwarf_regs[5]  = REG(R5);
+       dwarf_regs[6]  = REG(R6);
+       dwarf_regs[7]  = REG(R7);
+       dwarf_regs[8]  = REG(R8);
+       dwarf_regs[9]  = REG(R9);
+       dwarf_regs[10] = REG(R10);
+       dwarf_regs[11] = REG(FP);
+       dwarf_regs[12] = REG(IP);
+       dwarf_regs[13] = REG(SP);
+       dwarf_regs[14] = REG(LR);
+       dwarf_regs[15] = REG(PC);
+
+       return dwfl_thread_state_registers(thread, 0, PERF_REG_ARM_MAX,
+                                          dwarf_regs);
+}