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]
diff --git a/arch/tile/include/asm/ptrace.h b/arch/tile/include/asm/ptrace.h
index 2e83fc1..fd41226 100644
--- a/arch/tile/include/asm/ptrace.h
+++ b/arch/tile/include/asm/ptrace.h
@@ -44,7 +44,8 @@
struct pt_regs *get_pt_regs(struct pt_regs *);
/* Trace the current syscall. */
-extern void do_syscall_trace(void);
+extern int do_syscall_trace_enter(struct pt_regs *regs);
+extern void do_syscall_trace_exit(struct pt_regs *regs);
#define arch_has_single_step() (1)
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
index f212bf7..cb52d66 100644
--- a/arch/tile/kernel/intvec_32.S
+++ b/arch/tile/kernel/intvec_32.S
@@ -1201,7 +1201,10 @@
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 @@
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 4ea0809..21991f7 100644
--- a/arch/tile/kernel/intvec_64.S
+++ b/arch/tile/kernel/intvec_64.S
@@ -1006,7 +1006,10 @@
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 @@
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 9835312..0ab8b76 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 @@
}
#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;
-
- /*
- * 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));
-
- /*
- * 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;
+ if (tracehook_report_syscall_entry(regs)) {
+ regs->regs[TREG_SYSCALL_NR] = -1;
}
+
+ return regs->regs[TREG_SYSCALL_NR];
+}
+
+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)
