diff options
Diffstat (limited to 'kernel/arch/um/os-Linux/signal.c')
| -rw-r--r-- | kernel/arch/um/os-Linux/signal.c | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/kernel/arch/um/os-Linux/signal.c b/kernel/arch/um/os-Linux/signal.c index 7b605e4df..c211153ca 100644 --- a/kernel/arch/um/os-Linux/signal.c +++ b/kernel/arch/um/os-Linux/signal.c @@ -1,4 +1,6 @@ /* + * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk}) + * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de) * Copyright (C) 2004 PathScale, Inc * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL @@ -13,7 +15,6 @@ #include <kern_util.h> #include <os.h> #include <sysdep/mcontext.h> -#include "internal.h" void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = { [SIGTRAP] = relay_signal, @@ -23,7 +24,8 @@ void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = { [SIGBUS] = bus_handler, [SIGSEGV] = segv_handler, [SIGIO] = sigio_handler, - [SIGVTALRM] = timer_handler }; + [SIGALRM] = timer_handler +}; static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) { @@ -38,7 +40,7 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) } /* enable signals if sig isn't IRQ signal */ - if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM)) + if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGALRM)) unblock_signals(); (*sig_info[sig])(sig, si, &r); @@ -55,8 +57,8 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) #define SIGIO_BIT 0 #define SIGIO_MASK (1 << SIGIO_BIT) -#define SIGVTALRM_BIT 1 -#define SIGVTALRM_MASK (1 << SIGVTALRM_BIT) +#define SIGALRM_BIT 1 +#define SIGALRM_MASK (1 << SIGALRM_BIT) static int signals_enabled; static unsigned int signals_pending; @@ -78,43 +80,47 @@ void sig_handler(int sig, struct siginfo *si, mcontext_t *mc) set_signals(enabled); } -static void real_alarm_handler(mcontext_t *mc) +static void timer_real_alarm_handler(mcontext_t *mc) { struct uml_pt_regs regs; if (mc != NULL) get_regs_from_mc(®s, mc); - regs.is_user = 0; - unblock_signals(); - timer_handler(SIGVTALRM, NULL, ®s); + timer_handler(SIGALRM, NULL, ®s); } -void alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc) +void timer_alarm_handler(int sig, struct siginfo *unused_si, mcontext_t *mc) { int enabled; enabled = signals_enabled; if (!signals_enabled) { - signals_pending |= SIGVTALRM_MASK; + signals_pending |= SIGALRM_MASK; return; } block_signals(); - real_alarm_handler(mc); + timer_real_alarm_handler(mc); set_signals(enabled); } -void timer_init(void) +void deliver_alarm(void) { + timer_alarm_handler(SIGALRM, NULL, NULL); +} + +void timer_set_signal_handler(void) { - set_handler(SIGVTALRM); + set_handler(SIGALRM); } void set_sigstack(void *sig_stack, int size) { - stack_t stack = ((stack_t) { .ss_flags = 0, - .ss_sp = (__ptr_t) sig_stack, - .ss_size = size - sizeof(void *) }); + stack_t stack = { + .ss_flags = 0, + .ss_sp = sig_stack, + .ss_size = size - sizeof(void *) + }; if (sigaltstack(&stack, NULL) != 0) panic("enabling signal stack failed, errno = %d\n", errno); @@ -129,10 +135,9 @@ static void (*handlers[_NSIG])(int sig, struct siginfo *si, mcontext_t *mc) = { [SIGIO] = sig_handler, [SIGWINCH] = sig_handler, - [SIGVTALRM] = alarm_handler + [SIGALRM] = timer_alarm_handler }; - static void hard_handler(int sig, siginfo_t *si, void *p) { struct ucontext *uc = p; @@ -186,9 +191,9 @@ void set_handler(int sig) /* block irq ones */ sigemptyset(&action.sa_mask); - sigaddset(&action.sa_mask, SIGVTALRM); sigaddset(&action.sa_mask, SIGIO); sigaddset(&action.sa_mask, SIGWINCH); + sigaddset(&action.sa_mask, SIGALRM); if (sig == SIGSEGV) flags |= SA_NODEFER; @@ -281,8 +286,8 @@ void unblock_signals(void) if (save_pending & SIGIO_MASK) sig_handler_common(SIGIO, NULL, NULL); - if (save_pending & SIGVTALRM_MASK) - real_alarm_handler(NULL); + if (save_pending & SIGALRM_MASK) + timer_real_alarm_handler(NULL); } } |