diff options
Diffstat (limited to 'arch/um/os-Linux/skas/process.c')
| -rw-r--r-- | arch/um/os-Linux/skas/process.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 7baf90fda58..42e3d1ed802 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -8,7 +8,6 @@ #include <unistd.h> #include <errno.h> #include <signal.h> -#include <setjmp.h> #include <sched.h> #include "ptrace_user.h" #include <sys/wait.h> @@ -156,11 +155,15 @@ extern int __syscall_stub_start; static int userspace_tramp(void *stack) { void *addr; + int err; ptrace(PTRACE_TRACEME, 0, 0, 0); init_new_thread_signals(); - enable_timer(); + err = set_interval(1); + if(err) + panic("userspace_tramp - setting timer failed, errno = %d\n", + err); if(!proc_mm){ /* This has a pte, but it can't be mapped in with the usual @@ -190,14 +193,25 @@ static int userspace_tramp(void *stack) } } if(!ptrace_faultinfo && (stack != NULL)){ + struct sigaction sa; + unsigned long v = UML_CONFIG_STUB_CODE + (unsigned long) stub_segv_handler - (unsigned long) &__syscall_stub_start; set_sigstack((void *) UML_CONFIG_STUB_DATA, page_size()); - set_handler(SIGSEGV, (void *) v, SA_ONSTACK, - SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, - SIGUSR1, -1); + sigemptyset(&sa.sa_mask); + sigaddset(&sa.sa_mask, SIGIO); + sigaddset(&sa.sa_mask, SIGWINCH); + sigaddset(&sa.sa_mask, SIGALRM); + sigaddset(&sa.sa_mask, SIGVTALRM); + sigaddset(&sa.sa_mask, SIGUSR1); + sa.sa_flags = SA_ONSTACK; + sa.sa_handler = (void *) v; + sa.sa_restorer = NULL; + if(sigaction(SIGSEGV, &sa, NULL) < 0) + panic("userspace_tramp - setting SIGSEGV handler " + "failed - errno = %d\n", errno); } os_stop_process(os_getpid()); @@ -470,7 +484,7 @@ void thread_wait(void *sw, void *fb) *switch_buf = &buf; fork_buf = fb; if(UML_SETJMP(&buf) == 0) - siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK); + UML_LONGJMP(fork_buf, INIT_JMP_REMOVE_SIGSTACK); } void switch_threads(void *me, void *next) |