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Diffstat (limited to 'arch/x86/ia32')
-rw-r--r--arch/x86/ia32/ia32_signal.c70
1 files changed, 27 insertions, 43 deletions
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index dd77ac0cac4..588a7aa937e 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -33,8 +33,6 @@
#include <asm/sigframe.h>
#include <asm/sys_ia32.h>
-#define DEBUG_SIG 0
-
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
#define FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \
@@ -190,42 +188,47 @@ asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
/*
* Do a signal return; undo the signal stack.
*/
+#define loadsegment_gs(v) load_gs_index(v)
+#define loadsegment_fs(v) loadsegment(fs, v)
+#define loadsegment_ds(v) loadsegment(ds, v)
+#define loadsegment_es(v) loadsegment(es, v)
+
+#define get_user_seg(seg) ({ unsigned int v; savesegment(seg, v); v; })
+#define set_user_seg(seg, v) loadsegment_##seg(v)
+
#define COPY(x) { \
get_user_ex(regs->x, &sc->x); \
}
-#define COPY_SEG_CPL3(seg) { \
- unsigned short tmp; \
- get_user_ex(tmp, &sc->seg); \
- regs->seg = tmp | 3; \
-}
+#define GET_SEG(seg) ({ \
+ unsigned short tmp; \
+ get_user_ex(tmp, &sc->seg); \
+ tmp; \
+})
+
+#define COPY_SEG_CPL3(seg) do { \
+ regs->seg = GET_SEG(seg) | 3; \
+} while (0)
#define RELOAD_SEG(seg) { \
- unsigned int cur, pre; \
- get_user_ex(pre, &sc->seg); \
- savesegment(seg, cur); \
+ unsigned int pre = GET_SEG(seg); \
+ unsigned int cur = get_user_seg(seg); \
pre |= 3; \
if (pre != cur) \
- loadsegment(seg, pre); \
+ set_user_seg(seg, pre); \
}
static int ia32_restore_sigcontext(struct pt_regs *regs,
struct sigcontext_ia32 __user *sc,
unsigned int *pax)
{
- unsigned int tmpflags, gs, oldgs, err = 0;
+ unsigned int tmpflags, err = 0;
void __user *buf;
u32 tmp;
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
-#if DEBUG_SIG
- printk(KERN_DEBUG "SIG restore_sigcontext: "
- "sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
- sc, sc->err, sc->ip, sc->cs, sc->flags);
-#endif
-
get_user_try {
/*
* Reload fs and gs if they have changed in the signal
@@ -233,12 +236,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
* the handler, but does not clobber them at least in the
* normal case.
*/
- get_user_ex(gs, &sc->gs);
- gs |= 3;
- savesegment(gs, oldgs);
- if (gs != oldgs)
- load_gs_index(gs);
-
+ RELOAD_SEG(gs);
RELOAD_SEG(fs);
RELOAD_SEG(ds);
RELOAD_SEG(es);
@@ -337,17 +335,13 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
void __user *fpstate,
struct pt_regs *regs, unsigned int mask)
{
- int tmp, err = 0;
+ int err = 0;
put_user_try {
- savesegment(gs, tmp);
- put_user_ex(tmp, (unsigned int __user *)&sc->gs);
- savesegment(fs, tmp);
- put_user_ex(tmp, (unsigned int __user *)&sc->fs);
- savesegment(ds, tmp);
- put_user_ex(tmp, (unsigned int __user *)&sc->ds);
- savesegment(es, tmp);
- put_user_ex(tmp, (unsigned int __user *)&sc->es);
+ put_user_ex(get_user_seg(gs), (unsigned int __user *)&sc->gs);
+ put_user_ex(get_user_seg(fs), (unsigned int __user *)&sc->fs);
+ put_user_ex(get_user_seg(ds), (unsigned int __user *)&sc->ds);
+ put_user_ex(get_user_seg(es), (unsigned int __user *)&sc->es);
put_user_ex(regs->di, &sc->di);
put_user_ex(regs->si, &sc->si);
@@ -488,11 +482,6 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
regs->cs = __USER32_CS;
regs->ss = __USER32_DS;
-#if DEBUG_SIG
- printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
- current->comm, current->pid, frame, regs->ip, frame->pretcode);
-#endif
-
return 0;
}
@@ -574,10 +563,5 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->cs = __USER32_CS;
regs->ss = __USER32_DS;
-#if DEBUG_SIG
- printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
- current->comm, current->pid, frame, regs->ip, frame->pretcode);
-#endif
-
return 0;
}