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x86_64: use save/loadsegment in ia32 compat

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Use savesegment and loadsegment consistently in ia32 compat code.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-08-19 13:04:19 -07:00 committed by Ingo Molnar
parent c171f465b7
commit b6edbb1e04
3 changed files with 20 additions and 17 deletions
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11
arch/x86/ia32/ia32_aout.c
View file

@ -85,8 +85,10 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
dump->regs.ax = regs->ax;
dump->regs.ds = current->thread.ds;
dump->regs.es = current->thread.es;
asm("movl %%fs,%0" : "=r" (fs)); dump->regs.fs = fs;
asm("movl %%gs,%0" : "=r" (gs)); dump->regs.gs = gs;
savesegment(fs, fs);
dump->regs.fs = fs;
savesegment(gs, gs);
dump->regs.gs = gs;
dump->regs.orig_ax = regs->orig_ax;
dump->regs.ip = regs->ip;
dump->regs.cs = regs->cs;
@ -430,8 +432,9 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
current->mm->start_stack =
(unsigned long)create_aout_tables((char __user *)bprm->p, bprm);
/* start thread */
asm volatile("movl %0,%%fs" :: "r" (0)); \
asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS));
loadsegment(fs, 0);
loadsegment(ds, __USER32_DS);
loadsegment(es, __USER32_DS);
load_gs_index(0);
(regs)->ip = ex.a_entry;
(regs)->sp = current->mm->start_stack;

21
arch/x86/ia32/ia32_signal.c
View file

@ -206,7 +206,7 @@ struct rt_sigframe
{ unsigned int cur; \
unsigned short pre; \
err |= __get_user(pre, &sc->seg); \
asm volatile("movl %%" #seg ",%0" : "=r" (cur)); \
savesegment(seg, cur); \
pre |= mask; \
if (pre != cur) loadsegment(seg, pre); }
@ -235,7 +235,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
*/
err |= __get_user(gs, &sc->gs);
gs |= 3;
asm("movl %%gs,%0" : "=r" (oldgs));
savesegment(gs, oldgs);
if (gs != oldgs)
load_gs_index(gs);
@ -355,14 +355,13 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
{
int tmp, err = 0;
tmp = 0;
__asm__("movl %%gs,%0" : "=r"(tmp): "0"(tmp));
savesegment(gs, tmp);
err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
__asm__("movl %%fs,%0" : "=r"(tmp): "0"(tmp));
savesegment(fs, tmp);
err |= __put_user(tmp, (unsigned int __user *)&sc->fs);
__asm__("movl %%ds,%0" : "=r"(tmp): "0"(tmp));
savesegment(ds, tmp);
err |= __put_user(tmp, (unsigned int __user *)&sc->ds);
__asm__("movl %%es,%0" : "=r"(tmp): "0"(tmp));
savesegment(es, tmp);
err |= __put_user(tmp, (unsigned int __user *)&sc->es);
err |= __put_user((u32)regs->di, &sc->di);
@ -498,8 +497,8 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
regs->dx = 0;
regs->cx = 0;
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
loadsegment(ds, __USER32_DS);
loadsegment(es, __USER32_DS);
regs->cs = __USER32_CS;
regs->ss = __USER32_DS;
@ -591,8 +590,8 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->dx = (unsigned long) &frame->info;
regs->cx = (unsigned long) &frame->uc;
asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
loadsegment(ds, __USER32_DS);
loadsegment(es, __USER32_DS);
regs->cs = __USER32_CS;
regs->ss = __USER32_DS;

5
include/asm-x86/elf.h
View file

@ -148,8 +148,9 @@ do { \
static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
{
asm volatile("movl %0,%%fs" :: "r" (0));
asm volatile("movl %0,%%es; movl %0,%%ds" : : "r" (__USER32_DS));
loadsegment(fs, 0);
loadsegment(ds, __USER32_DS);
loadsegment(es, __USER32_DS);
load_gs_index(0);
regs->ip = ip;
regs->sp = sp;