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perf tests x86: Introduce perf_regs_load function

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Introducing perf_regs_load function, which is going to be used for dwarf
unwind test in following patches.

It takes single argument as a pointer to the regs dump buffer and
populates it with current registers values.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Jean Pihet <jean.pihet@linaro.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: Jean Pihet <jean.pihet@linaro.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/1389098853-14466-5-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2014-01-07 13:47:21 +01:00 • committed by Arnaldo Carvalho de Melo
commit 3c8b06f981
3 changed files with 95 additions and 0 deletions
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1
tools/perf/arch/x86/Makefile
View file

@ -4,6 +4,7 @@ LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
endif
ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/regs_load.o
endif
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/tsc.o

2
tools/perf/arch/x86/include/perf_regs.h
View file

@ -5,6 +5,8 @@
#include "../../util/types.h"
#include <asm/perf_regs.h>
void perf_regs_load(u64 *regs);
#ifndef HAVE_ARCH_X86_64_SUPPORT
#define PERF_REGS_MASK ((1ULL << PERF_REG_X86_32_MAX) - 1)
#else

92
tools/perf/arch/x86/tests/regs_load.S Normal file
View file

@ -0,0 +1,92 @@
#include <linux/linkage.h>
#define AX 0
#define BX 1 * 8
#define CX 2 * 8
#define DX 3 * 8
#define SI 4 * 8
#define DI 5 * 8
#define BP 6 * 8
#define SP 7 * 8
#define IP 8 * 8
#define FLAGS 9 * 8
#define CS 10 * 8
#define SS 11 * 8
#define DS 12 * 8
#define ES 13 * 8
#define FS 14 * 8
#define GS 15 * 8
#define R8 16 * 8
#define R9 17 * 8
#define R10 18 * 8
#define R11 19 * 8
#define R12 20 * 8
#define R13 21 * 8
#define R14 22 * 8
#define R15 23 * 8
.text
#ifdef HAVE_ARCH_X86_64_SUPPORT
ENTRY(perf_regs_load)
movq %rax, AX(%rdi)
movq %rbx, BX(%rdi)
movq %rcx, CX(%rdi)
movq %rdx, DX(%rdi)
movq %rsi, SI(%rdi)
movq %rdi, DI(%rdi)
movq %rbp, BP(%rdi)
leaq 8(%rsp), %rax /* exclude this call. */
movq %rax, SP(%rdi)
movq 0(%rsp), %rax
movq %rax, IP(%rdi)
movq $0, FLAGS(%rdi)
movq $0, CS(%rdi)
movq $0, SS(%rdi)
movq $0, DS(%rdi)
movq $0, ES(%rdi)
movq $0, FS(%rdi)
movq $0, GS(%rdi)
movq %r8, R8(%rdi)
movq %r9, R9(%rdi)
movq %r10, R10(%rdi)
movq %r11, R11(%rdi)
movq %r12, R12(%rdi)
movq %r13, R13(%rdi)
movq %r14, R14(%rdi)
movq %r15, R15(%rdi)
ret
ENDPROC(perf_regs_load)
#else
ENTRY(perf_regs_load)
push %edi
movl 8(%esp), %edi
movl %eax, AX(%edi)
movl %ebx, BX(%edi)
movl %ecx, CX(%edi)
movl %edx, DX(%edi)
movl %esi, SI(%edi)
pop %eax
movl %eax, DI(%edi)
movl %ebp, BP(%edi)
leal 4(%esp), %eax /* exclude this call. */
movl %eax, SP(%edi)
movl 0(%esp), %eax
movl %eax, IP(%edi)
movl $0, FLAGS(%edi)
movl $0, CS(%edi)
movl $0, SS(%edi)
movl $0, DS(%edi)
movl $0, ES(%edi)
movl $0, FS(%edi)
movl $0, GS(%edi)
ret
ENDPROC(perf_regs_load)
#endif