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authorSimon Marchi <simon.marchi@polymtl.ca>2012-12-22 00:21:10 -0500
committerChris Metcalf <cmetcalf@tilera.com>2013-03-21 15:39:34 -0400
commitef18272453c97238fc9a89211d4c609ef9c760dc (patch)
treef136861b2a31cc85027260775c9d00551c91d305 /arch/tile/kernel
parenta937536b868b8369b98967929045f1df54234323 (diff)
downloadvexpress-lsk-ef18272453c97238fc9a89211d4c609ef9c760dc.tar.gz
arch/tile: Call tracehook_report_syscall_{entry,exit} in syscall trace
Call tracehook functions for syscall tracing. The check for TIF_SYSCALL_TRACE was removed, because the same check is done right before in the assembly file. Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [with ptrace.h fixup]
Diffstat (limited to 'arch/tile/kernel')
-rw-r--r--arch/tile/kernel/intvec_32.S10
-rw-r--r--arch/tile/kernel/intvec_64.S10
-rw-r--r--arch/tile/kernel/ptrace.c30
3 files changed, 26 insertions, 24 deletions
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
index f212bf7cea8..cb52d66343e 100644
--- a/arch/tile/kernel/intvec_32.S
+++ b/arch/tile/kernel/intvec_32.S
@@ -1201,7 +1201,10 @@ handle_syscall:
lw r30, r31
andi r30, r30, _TIF_SYSCALL_TRACE
bzt r30, .Lrestore_syscall_regs
- jal do_syscall_trace
+ {
+ PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+ jal do_syscall_trace_enter
+ }
FEEDBACK_REENTER(handle_syscall)
/*
@@ -1252,7 +1255,10 @@ handle_syscall:
lw r30, r31
andi r30, r30, _TIF_SYSCALL_TRACE
bzt r30, 1f
- jal do_syscall_trace
+ {
+ PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+ jal do_syscall_trace_exit
+ }
FEEDBACK_REENTER(handle_syscall)
1: {
movei r30, 0 /* not an NMI */
diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S
index 4ea08090265..21991f72eba 100644
--- a/arch/tile/kernel/intvec_64.S
+++ b/arch/tile/kernel/intvec_64.S
@@ -1006,7 +1006,10 @@ handle_syscall:
addi r30, r31, THREAD_INFO_STATUS_OFFSET - THREAD_INFO_FLAGS_OFFSET
beqzt r30, .Lrestore_syscall_regs
}
- jal do_syscall_trace
+ {
+ PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+ jal do_syscall_trace_enter
+ }
FEEDBACK_REENTER(handle_syscall)
/*
@@ -1077,7 +1080,10 @@ handle_syscall:
andi r0, r30, _TIF_SINGLESTEP
beqzt r0, 1f
}
- jal do_syscall_trace
+ {
+ PTREGS_PTR(r0, PTREGS_OFFSET_BASE)
+ jal do_syscall_trace_exit
+ }
FEEDBACK_REENTER(handle_syscall)
andi r0, r30, _TIF_SINGLESTEP
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
index 9835312d5a9..0ab8b76badd 100644
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -21,6 +21,7 @@
#include <linux/uaccess.h>
#include <linux/regset.h>
#include <linux/elf.h>
+#include <linux/tracehook.h>
#include <asm/traps.h>
#include <arch/chip.h>
@@ -246,29 +247,18 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
}
#endif
-void do_syscall_trace(void)
+int do_syscall_trace_enter(struct pt_regs *regs)
{
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
-
- if (!(current->ptrace & PT_PTRACED))
- return;
+ if (tracehook_report_syscall_entry(regs)) {
+ regs->regs[TREG_SYSCALL_NR] = -1;
+ }
- /*
- * The 0x80 provides a way for the tracing parent to distinguish
- * between a syscall stop and SIGTRAP delivery
- */
- ptrace_notify(SIGTRAP|((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0));
+ return regs->regs[TREG_SYSCALL_NR];
+}
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
+void do_syscall_trace_exit(struct pt_regs *regs)
+{
+ tracehook_report_syscall_exit(regs, 0);
}
void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)