2012-08-07 07:20:36 -06:00
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/kernel.h>
|
2012-08-07 07:20:37 -06:00
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/perf_event.h>
|
2012-08-07 07:20:36 -06:00
|
|
|
#include <linux/bug.h>
|
|
|
|
#include <linux/stddef.h>
|
|
|
|
#include <asm/perf_regs.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
|
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
#define PERF_REG_X86_MAX PERF_REG_X86_32_MAX
|
|
|
|
#else
|
|
|
|
#define PERF_REG_X86_MAX PERF_REG_X86_64_MAX
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define PT_REGS_OFFSET(id, r) [id] = offsetof(struct pt_regs, r)
|
|
|
|
|
|
|
|
static unsigned int pt_regs_offset[PERF_REG_X86_MAX] = {
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_AX, ax),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_BX, bx),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_CX, cx),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_DX, dx),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_SI, si),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_DI, di),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_BP, bp),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_SP, sp),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_IP, ip),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_FLAGS, flags),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_CS, cs),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_SS, ss),
|
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_DS, ds),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_ES, es),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_FS, fs),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_GS, gs),
|
|
|
|
#else
|
|
|
|
/*
|
|
|
|
* The pt_regs struct does not store
|
|
|
|
* ds, es, fs, gs in 64 bit mode.
|
|
|
|
*/
|
|
|
|
(unsigned int) -1,
|
|
|
|
(unsigned int) -1,
|
|
|
|
(unsigned int) -1,
|
|
|
|
(unsigned int) -1,
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_64
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R8, r8),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R9, r9),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R10, r10),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R11, r11),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R12, r12),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R13, r13),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R14, r14),
|
|
|
|
PT_REGS_OFFSET(PERF_REG_X86_R15, r15),
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
u64 perf_reg_value(struct pt_regs *regs, int idx)
|
|
|
|
{
|
2012-09-05 06:31:26 -06:00
|
|
|
if (WARN_ON_ONCE(idx >= ARRAY_SIZE(pt_regs_offset)))
|
2012-08-07 07:20:36 -06:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
return regs_get_register(regs, pt_regs_offset[idx]);
|
|
|
|
}
|
|
|
|
|
|
|
|
#define REG_RESERVED (~((1ULL << PERF_REG_X86_MAX) - 1ULL))
|
|
|
|
|
|
|
|
#ifdef CONFIG_X86_32
|
|
|
|
int perf_reg_validate(u64 mask)
|
|
|
|
{
|
|
|
|
if (!mask || mask & REG_RESERVED)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2012-08-07 07:20:37 -06:00
|
|
|
|
|
|
|
u64 perf_reg_abi(struct task_struct *task)
|
|
|
|
{
|
|
|
|
return PERF_SAMPLE_REGS_ABI_32;
|
|
|
|
}
|
2012-08-07 07:20:36 -06:00
|
|
|
#else /* CONFIG_X86_64 */
|
|
|
|
#define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \
|
|
|
|
(1ULL << PERF_REG_X86_ES) | \
|
|
|
|
(1ULL << PERF_REG_X86_FS) | \
|
|
|
|
(1ULL << PERF_REG_X86_GS))
|
|
|
|
|
|
|
|
int perf_reg_validate(u64 mask)
|
|
|
|
{
|
|
|
|
if (!mask || mask & REG_RESERVED)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (mask & REG_NOSUPPORT)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2012-08-07 07:20:37 -06:00
|
|
|
|
|
|
|
u64 perf_reg_abi(struct task_struct *task)
|
|
|
|
{
|
|
|
|
if (test_tsk_thread_flag(task, TIF_IA32))
|
|
|
|
return PERF_SAMPLE_REGS_ABI_32;
|
|
|
|
else
|
|
|
|
return PERF_SAMPLE_REGS_ABI_64;
|
|
|
|
}
|
2012-08-07 07:20:36 -06:00
|
|
|
#endif /* CONFIG_X86_32 */
|