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ntdll: Use a custom signal restorer for Android. 

Bionic doesn't provide one, even when vdso has been unmapped by the
preloader.
This commit is contained in:
Alexandre Julliard 2014-07-17 14:51:12 +02:00
parent cafb192ecc
commit 1b1ea639cd
1 changed files with 10 additions and 1 deletions
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11
dlls/ntdll/signal_i386.c
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@ -135,6 +135,12 @@ typedef struct ucontext
#define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpstate))
#define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpstate->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
/* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
void rt_sigreturn(void);
__ASM_GLOBAL_FUNC( rt_sigreturn,
"movl $173,%eax\n\t" /* NR_rt_sigreturn */
"int $0x80" );
#elif defined (__linux__)
typedef ucontext_t SIGCONTEXT;
@ -2327,7 +2333,10 @@ void signal_init_process(void)
#ifdef SA_ONSTACK
sig_act.sa_flags |= SA_ONSTACK;
#endif
#ifdef __ANDROID__
sig_act.sa_flags |= SA_RESTORER;
sig_act.sa_restorer = rt_sigreturn;
#endif
sig_act.sa_sigaction = int_handler;
if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
sig_act.sa_sigaction = fpe_handler;