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author | Ingo Molnar <mingo@elte.hu> | 2009-02-26 12:02:23 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-02-26 12:02:23 (GMT) |
commit | 8e818179eb9e8f9e44d8410dd2a25077d026a08e (patch) | |
tree | 7d08afd30c95c04129c20693d974a18799caeb5a /arch/x86/ia32 | |
parent | 742bd95ba96e19b3f7196c3a0834ebc17c8ba006 (diff) | |
parent | ecc25fbd6b9e07b33895c61ddf84006b00f55d99 (diff) | |
download | linux-8e818179eb9e8f9e44d8410dd2a25077d026a08e.tar.xz |
Merge branch 'x86/core' into perfcounters/core
Conflicts:
arch/x86/kernel/apic/apic.c
arch/x86/kernel/irqinit_32.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/ia32')
-rw-r--r-- | arch/x86/ia32/ia32_signal.c | 70 |
1 files changed, 27 insertions, 43 deletions
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c index dd77ac0..588a7aa 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; } |