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alpha-linux-user: Implement signals.

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Move userland PALcode handling into linux-user main loop so that
we can send signals from there.  This also makes alpha_palcode.c
system-level only, so don't build it for userland.  Add defines
for GENTRAP PALcall mapping to signals.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2009-12-27 18:30:03 -08:00 • committed by Aurelien Jarno
parent f24518b502
commit 6049f4f831
9 changed files with 489 additions and 117 deletions
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61
linux-user/syscall.c
View file

@ -4775,20 +4775,18 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#ifdef TARGET_NR_sigaction
case TARGET_NR_sigaction:
{
#if !defined(TARGET_MIPS)
#if defined(TARGET_ALPHA)
struct target_sigaction act, oact, *pact = 0;
struct target_old_sigaction *old_act;
struct target_sigaction act, oact, *pact;
if (arg2) {
if (!lock_user_struct(VERIFY_READ, old_act, arg2, 1))
goto efault;
act._sa_handler = old_act->_sa_handler;
target_siginitset(&act.sa_mask, old_act->sa_mask);
act.sa_flags = old_act->sa_flags;
act.sa_restorer = old_act->sa_restorer;
act.sa_restorer = 0;
unlock_user_struct(old_act, arg2, 0);
pact = &act;
} else {
pact = NULL;
}
ret = get_errno(do_sigaction(arg1, pact, &oact));
if (!is_error(ret) && arg3) {
@ -4797,10 +4795,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
old_act->_sa_handler = oact._sa_handler;
old_act->sa_mask = oact.sa_mask.sig[0];
old_act->sa_flags = oact.sa_flags;
old_act->sa_restorer = oact.sa_restorer;
unlock_user_struct(old_act, arg3, 1);
}
#else
#elif defined(TARGET_MIPS)
struct target_sigaction act, oact, *pact, *old_act;
if (arg2) {
@ -4828,12 +4825,61 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
old_act->sa_mask.sig[3] = 0;
unlock_user_struct(old_act, arg3, 1);
}
#else
struct target_old_sigaction *old_act;
struct target_sigaction act, oact, *pact;
if (arg2) {
if (!lock_user_struct(VERIFY_READ, old_act, arg2, 1))
goto efault;
act._sa_handler = old_act->_sa_handler;
target_siginitset(&act.sa_mask, old_act->sa_mask);
act.sa_flags = old_act->sa_flags;
act.sa_restorer = old_act->sa_restorer;
unlock_user_struct(old_act, arg2, 0);
pact = &act;
} else {
pact = NULL;
}
ret = get_errno(do_sigaction(arg1, pact, &oact));
if (!is_error(ret) && arg3) {
if (!lock_user_struct(VERIFY_WRITE, old_act, arg3, 0))
goto efault;
old_act->_sa_handler = oact._sa_handler;
old_act->sa_mask = oact.sa_mask.sig[0];
old_act->sa_flags = oact.sa_flags;
old_act->sa_restorer = oact.sa_restorer;
unlock_user_struct(old_act, arg3, 1);
}
#endif
}
break;
#endif
case TARGET_NR_rt_sigaction:
{
#if defined(TARGET_ALPHA)
struct target_sigaction act, oact, *pact = 0;
struct target_rt_sigaction *rt_act;
/* ??? arg4 == sizeof(sigset_t). */
if (arg2) {
if (!lock_user_struct(VERIFY_READ, rt_act, arg2, 1))
goto efault;
act._sa_handler = rt_act->_sa_handler;
act.sa_mask = rt_act->sa_mask;
act.sa_flags = rt_act->sa_flags;
act.sa_restorer = arg5;
unlock_user_struct(rt_act, arg2, 0);
pact = &act;
}
ret = get_errno(do_sigaction(arg1, pact, &oact));
if (!is_error(ret) && arg3) {
if (!lock_user_struct(VERIFY_WRITE, rt_act, arg3, 0))
goto efault;
rt_act->_sa_handler = oact._sa_handler;
rt_act->sa_mask = oact.sa_mask;
rt_act->sa_flags = oact.sa_flags;
unlock_user_struct(rt_act, arg3, 1);
}
#else
struct target_sigaction *act;
struct target_sigaction *oact;
@ -4855,6 +4901,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
unlock_user_struct(act, arg2, 0);
if (oact)
unlock_user_struct(oact, arg3, 1);
#endif
}
break;
#ifdef TARGET_NR_sgetmask /* not on alpha */