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linux-user: introduce target_sigsp() and target_save_altstack()

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Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180411192347.30228-1-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2018-04-11 21:23:47 +02:00
parent e8fa729574
commit 465e237bf7
19 changed files with 108 additions and 203 deletions
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17
linux-user/arm/signal.c
View file

@ -201,14 +201,9 @@ setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
static inline abi_ulong
get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
{
unsigned long sp = regs->regs[13];
unsigned long sp;
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
}
sp = target_sigsp(get_sp_from_cpustate(regs), ka);
/*
* ATPCS B01 mandates 8-byte alignment
*/
@ -346,9 +341,7 @@ static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
memset(&stack, 0, sizeof(stack));
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
target_save_altstack(&stack, env);
memcpy(&uc->tuc_stack, &stack, sizeof(stack));
setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
@ -461,9 +454,7 @@ static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
memset(&stack, 0, sizeof(stack));
__put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
__put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
__put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
target_save_altstack(&stack, env);
memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);