From b6024b21fec8367ef961a771cc9dde31f1831965 Mon Sep 17 00:00:00 2001 From: Eli Cooper Date: Sun, 20 Mar 2016 00:58:40 +0800 Subject: um: extend fpstate to _xstate to support YMM registers Extends fpstate to _xstate, in order to hold AVX/YMM registers. To avoid oversized stack frame, the following functions have been refactored by using malloc. - sig_handler_common - timer_real_alarm_handler Signed-off-by: Eli Cooper --- arch/um/os-Linux/signal.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) (limited to 'arch/um') diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 7801666514ed..8acaf4e384c0 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -29,23 +29,29 @@ void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = { static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) { - struct uml_pt_regs r; + struct uml_pt_regs *r; int save_errno = errno; - r.is_user = 0; + r = malloc(sizeof(struct uml_pt_regs)); + if (!r) + panic("out of memory"); + + r->is_user = 0; if (sig == SIGSEGV) { /* For segfaults, we want the data from the sigcontext. */ - get_regs_from_mc(&r, mc); - GET_FAULTINFO_FROM_MC(r.faultinfo, mc); + get_regs_from_mc(r, mc); + GET_FAULTINFO_FROM_MC(r->faultinfo, mc); } /* enable signals if sig isn't IRQ signal */ if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGALRM)) unblock_signals(); - (*sig_info[sig])(sig, si, &r); + (*sig_info[sig])(sig, si, r); errno = save_errno; + + free(r); } /* @@ -83,11 +89,17 @@ void sig_handler(int sig, struct siginfo *si, mcontext_t *mc) static void timer_real_alarm_handler(mcontext_t *mc) { - struct uml_pt_regs regs; + struct uml_pt_regs *regs; + + regs = malloc(sizeof(struct uml_pt_regs)); + if (!regs) + panic("out of memory"); if (mc != NULL) - get_regs_from_mc(®s, mc); - timer_handler(SIGALRM, NULL, ®s); + get_regs_from_mc(regs, mc); + timer_handler(SIGALRM, NULL, regs); + + free(regs); } void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc) -- cgit