Commit 1bfa2317 authored by Al Viro's avatar Al Viro Committed by Richard Weinberger

um: split syscall_trace(), pass pt_regs to it

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
[richard@nod.at: Fixed some minor build issues]
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent a3170d2e
...@@ -37,6 +37,8 @@ extern int putreg(struct task_struct *child, int regno, unsigned long value); ...@@ -37,6 +37,8 @@ extern int putreg(struct task_struct *child, int regno, unsigned long value);
extern int arch_copy_tls(struct task_struct *new); extern int arch_copy_tls(struct task_struct *new);
extern void clear_flushed_tls(struct task_struct *task); extern void clear_flushed_tls(struct task_struct *task);
extern void syscall_trace_enter(struct pt_regs *regs);
extern void syscall_trace_leave(struct pt_regs *regs);
#endif #endif
......
...@@ -3,11 +3,12 @@ ...@@ -3,11 +3,12 @@
* Licensed under the GPL * Licensed under the GPL
*/ */
#include "linux/audit.h" #include <linux/audit.h>
#include "linux/ptrace.h" #include <linux/ptrace.h>
#include "linux/sched.h" #include <linux/sched.h>
#include "asm/uaccess.h" #include <linux/tracehook.h>
#include "skas_ptrace.h" #include <asm/uaccess.h>
#include <skas_ptrace.h>
...@@ -162,48 +163,36 @@ static void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs, ...@@ -162,48 +163,36 @@ static void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs,
* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and
* PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check
*/ */
void syscall_trace(struct uml_pt_regs *regs, int entryexit) void syscall_trace_enter(struct pt_regs *regs)
{ {
int is_singlestep = (current->ptrace & PT_DTRACE) && entryexit; audit_syscall_entry(HOST_AUDIT_ARCH,
int tracesysgood; UPT_SYSCALL_NR(&regs->regs),
UPT_SYSCALL_ARG1(&regs->regs),
if (!entryexit) UPT_SYSCALL_ARG2(&regs->regs),
audit_syscall_entry(HOST_AUDIT_ARCH, UPT_SYSCALL_ARG3(&regs->regs),
UPT_SYSCALL_NR(regs), UPT_SYSCALL_ARG4(&regs->regs));
UPT_SYSCALL_ARG1(regs),
UPT_SYSCALL_ARG2(regs),
UPT_SYSCALL_ARG3(regs),
UPT_SYSCALL_ARG4(regs));
else
audit_syscall_exit(regs);
/* Fake a debug trap */
if (is_singlestep)
send_sigtrap(current, regs, 0);
if (!test_thread_flag(TIF_SYSCALL_TRACE)) if (!test_thread_flag(TIF_SYSCALL_TRACE))
return; return;
if (!(current->ptrace & PT_PTRACED)) tracehook_report_syscall_entry(regs);
return; }
/* void syscall_trace_leave(struct pt_regs *regs)
* the 0x80 provides a way for the tracing parent to distinguish {
* between a syscall stop and SIGTRAP delivery int ptraced = current->ptrace;
*/
tracesysgood = (current->ptrace & PT_TRACESYSGOOD);
ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0));
if (entryexit) /* force do_signal() --> is_syscall() */ audit_syscall_exit(regs);
set_thread_flag(TIF_SIGPENDING);
/* /* Fake a debug trap */
* this isn't the same as continuing with a signal, but it will do if (ptraced & PT_DTRACE)
* for normal use. strace only continues with a signal if the send_sigtrap(current, &regs->regs, 0);
* stopping signal is not SIGTRAP. -brl
*/ if (!test_thread_flag(TIF_SYSCALL_TRACE))
if (current->exit_code) { return;
send_sig(current->exit_code, current, 1);
current->exit_code = 0; tracehook_report_syscall_exit(regs, 0);
} /* force do_signal() --> is_syscall() */
if (ptraced & PT_PTRACED)
set_thread_flag(TIF_SIGPENDING);
} }
...@@ -18,7 +18,7 @@ void handle_syscall(struct uml_pt_regs *r) ...@@ -18,7 +18,7 @@ void handle_syscall(struct uml_pt_regs *r)
long result; long result;
int syscall; int syscall;
syscall_trace(r, 0); syscall_trace_enter(regs);
/* /*
* This should go in the declaration of syscall, but when I do that, * This should go in the declaration of syscall, but when I do that,
...@@ -36,5 +36,5 @@ void handle_syscall(struct uml_pt_regs *r) ...@@ -36,5 +36,5 @@ void handle_syscall(struct uml_pt_regs *r)
PT_REGS_SET_SYSCALL_RETURN(regs, result); PT_REGS_SET_SYSCALL_RETURN(regs, result);
syscall_trace(r, 1); syscall_trace_leave(regs);
} }
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment