perf tools: Add libdw DWARF post unwind support for ARM
Adding libdw DWARF post unwind support, which is part of elfutils-devel/libdw-dev package from version 0.158. The new code is contained in unwin-libdw.c object, and implements unwind__get_entries unwind interface function. Signed-off-by: Jean Pihet <jean.pihet@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1400229672-16104-4-git-send-email-jean.pihet@linaro.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
This commit is contained in:
parent
90fa9deb32
commit
97eac381b1
|
@ -4,6 +4,11 @@ LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
|
|||
endif
|
||||
ifndef NO_LIBUNWIND
|
||||
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libunwind.o
|
||||
endif
|
||||
ifndef NO_LIBDW_DWARF_UNWIND
|
||||
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libdw.o
|
||||
endif
|
||||
ifndef NO_DWARF_UNWIND
|
||||
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/regs_load.o
|
||||
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/dwarf-unwind.o
|
||||
endif
|
||||
|
|
36
tools/perf/arch/arm/util/unwind-libdw.c
Normal file
36
tools/perf/arch/arm/util/unwind-libdw.c
Normal file
|
@ -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);
|
||||
}
|
Loading…
Reference in a new issue