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[PATCH] x86_64: fix single step handling for 32bit processes

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Be more careful with TF handling to fix some copy protection codes in wine

patch originally for i386 by Linus, then ported to x86_64 by Andi Kleen
see: [PATCH] x86_64: Some fixes for single step handling
commit: be61bff789

But it was never applied to the ia32 emulation code which breaks some
copy-protection schemes under wine when running on x86_64.

Signed-off-by: Peter Beutner <p.beutner@gmx.net>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Peter Beutner 2006-01-11 22:43:18 +01:00 committed by Linus Torvalds
parent 60917a3832
commit 4724e3e86d
1 changed files with 7 additions and 19 deletions
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26
arch/x86_64/ia32/ia32_signal.c
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@ -353,7 +353,6 @@ ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __
struct pt_regs *regs, unsigned int mask)
{
int tmp, err = 0;
u32 eflags;
tmp = 0;
__asm__("movl %%gs,%0" : "=r"(tmp): "0"(tmp));
@ -378,10 +377,7 @@ ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __
err |= __put_user(current->thread.trap_no, &sc->trapno);
err |= __put_user(current->thread.error_code, &sc->err);
err |= __put_user((u32)regs->rip, &sc->eip);
eflags = regs->eflags;
if (current->ptrace & PT_PTRACED)
eflags &= ~TF_MASK;
err |= __put_user((u32)eflags, &sc->eflags);
err |= __put_user((u32)regs->eflags, &sc->eflags);
err |= __put_user((u32)regs->rsp, &sc->esp_at_signal);
tmp = save_i387_ia32(current, fpstate, regs, 0);
@ -505,13 +501,9 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
regs->ss = __USER32_DS;
set_fs(USER_DS);
if (regs->eflags & TF_MASK) {
if (current->ptrace & PT_PTRACED) {
ptrace_notify(SIGTRAP);
} else {
regs->eflags &= ~TF_MASK;
}
}
regs->eflags &= ~TF_MASK;
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
@ -605,13 +597,9 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->ss = __USER32_DS;
set_fs(USER_DS);
if (regs->eflags & TF_MASK) {
if (current->ptrace & PT_PTRACED) {
ptrace_notify(SIGTRAP);
} else {
regs->eflags &= ~TF_MASK;
}
}
regs->eflags &= ~TF_MASK;
if (test_thread_flag(TIF_SINGLESTEP))
ptrace_notify(SIGTRAP);
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",