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parisc: Add syscall tracepoint support 

This patch adds support for the TIF_SYSCALL_TRACEPOINT on the parisc
architecture. Basically, it calls the appropriate tracepoints on syscall
entry and exit.

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2016-04-13 22:44:54 +02:00
parent f6c658df63
commit fc79168a7c
6 changed files with 28 additions and 1 deletions
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1
arch/parisc/Kconfig
View File

@ -6,6 +6,7 @@ config PARISC
select HAVE_OPROFILE
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_SYSCALL_TRACEPOINTS
select ARCH_WANT_FRAME_POINTERS
select RTC_CLASS
select RTC_DRV_GENERIC

2
arch/parisc/include/asm/ftrace.h
View File

@ -6,6 +6,8 @@ extern void mcount(void);
#define MCOUNT_INSN_SIZE 4
extern unsigned long sys_call_table[];
extern unsigned long return_address(unsigned int);
#define ftrace_return_address(n) return_address(n)

9
arch/parisc/include/asm/syscall.h
View File

@ -8,6 +8,8 @@
#include <linux/err.h>
#include <asm/ptrace.h>
#define NR_syscalls (__NR_Linux_syscalls)
static inline long syscall_get_nr(struct task_struct *tsk,
struct pt_regs *regs)
{
@ -33,12 +35,19 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
args[1] = regs->gr[25];
case 1:
args[0] = regs->gr[26];
case 0:
break;
default:
BUG();
}
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
return regs->gr[28];
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)

4
arch/parisc/include/asm/thread_info.h
View File

@ -55,6 +55,7 @@ struct thread_info {
#define TIF_SINGLESTEP 9 /* single stepping? */
#define TIF_BLOCKSTEP 10 /* branch stepping? */
#define TIF_SECCOMP 11 /* secure computing */
#define TIF_SYSCALL_TRACEPOINT 12 /* syscall tracepoint instrumentation */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
@ -66,12 +67,13 @@ struct thread_info {
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
_TIF_NEED_RESCHED)
#define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
_TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT | \
_TIF_SECCOMP)
_TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
#ifdef CONFIG_64BIT
# ifdef CONFIG_COMPAT

12
arch/parisc/kernel/ptrace.c
View File

@ -30,6 +30,9 @@
/* PSW bits we allow the debugger to modify */
#define USER_PSW_BITS (PSW_N | PSW_B | PSW_V | PSW_CB)
#define CREATE_TRACE_POINTS
#include <trace/events/syscalls.h>
/*
* Called by kernel/ptrace.c when detaching..
*
@ -283,6 +286,10 @@ long do_syscall_trace_enter(struct pt_regs *regs)
regs->gr[20] = -1UL;
goto out;
}
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->gr[20]);
#endif
#ifdef CONFIG_64BIT
if (!is_compat_task())
@ -311,6 +318,11 @@ void do_syscall_trace_exit(struct pt_regs *regs)
audit_syscall_exit(regs);
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_exit(regs, regs->gr[20]);
#endif
if (stepping || test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, stepping);
}

1
arch/parisc/kernel/syscall.S
View File

@ -912,6 +912,7 @@ END(lws_table)
.align 8
ENTRY(sys_call_table)
.export sys_call_table,data
#include "syscall_table.S"
END(sys_call_table)