diff options
Diffstat (limited to 'arch/um/os-Linux')
26 files changed, 237 insertions, 194 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index f4bfc4c7ccac..b4183929b32c 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -4,15 +4,19 @@ # obj-y = aio.o elf_aux.o file.o helper.o irq.o main.o mem.o process.o sigio.o \ - signal.o start_up.o time.o trap.o tt.o tty.o uaccess.o umid.o tls.o \ + signal.o start_up.o time.o trap.o tty.o uaccess.o umid.o tls.o \ user_syms.o util.o drivers/ sys-$(SUBARCH)/ obj-$(CONFIG_MODE_SKAS) += skas/ + +obj-$(CONFIG_MODE_TT) += tt.o +user-objs-$(CONFIG_MODE_TT) += tt.o + obj-$(CONFIG_TTY_LOG) += tty_log.o user-objs-$(CONFIG_TTY_LOG) += tty_log.o USER_OBJS := $(user-objs-y) aio.o elf_aux.o file.o helper.o irq.o main.o mem.o \ - process.o sigio.o signal.o start_up.o time.o trap.o tt.o tty.o tls.o \ + process.o sigio.o signal.o start_up.o time.o trap.o tty.o tls.o \ uaccess.o umid.o util.o CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH) diff --git a/arch/um/os-Linux/drivers/etap.h b/arch/um/os-Linux/drivers/etap.h index b84f6c4740f7..57ecdaf2f67e 100644 --- a/arch/um/os-Linux/drivers/etap.h +++ b/arch/um/os-Linux/drivers/etap.h @@ -13,7 +13,7 @@ struct ethertap_data { void *dev; }; -extern struct net_user_info ethertap_user_info; +extern const struct net_user_info ethertap_user_info; /* * Overrides for Emacs so that we follow Linus's tabbing style. diff --git a/arch/um/os-Linux/drivers/ethertap_kern.c b/arch/um/os-Linux/drivers/ethertap_kern.c index 768606bec233..16385e2ada85 100644 --- a/arch/um/os-Linux/drivers/ethertap_kern.c +++ b/arch/um/os-Linux/drivers/ethertap_kern.c @@ -65,7 +65,7 @@ static int etap_write(int fd, struct sk_buff **skb, struct uml_net_private *lp) return(net_send(fd, (*skb)->data, (*skb)->len)); } -struct net_kern_info ethertap_kern_info = { +const struct net_kern_info ethertap_kern_info = { .init = etap_init, .protocol = eth_protocol, .read = etap_read, diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c index 8f49507e64ef..f559bdf746e6 100644 --- a/arch/um/os-Linux/drivers/ethertap_user.c +++ b/arch/um/os-Linux/drivers/ethertap_user.c @@ -216,7 +216,7 @@ static void etap_del_addr(unsigned char *addr, unsigned char *netmask, etap_close_addr(addr, netmask, &pri->control_fd); } -struct net_user_info ethertap_user_info = { +const struct net_user_info ethertap_user_info = { .init = etap_user_init, .open = etap_open, .close = etap_close, diff --git a/arch/um/os-Linux/drivers/tuntap.h b/arch/um/os-Linux/drivers/tuntap.h index 25d4a2868814..d3e8d3af6245 100644 --- a/arch/um/os-Linux/drivers/tuntap.h +++ b/arch/um/os-Linux/drivers/tuntap.h @@ -16,7 +16,7 @@ struct tuntap_data { void *dev; }; -extern struct net_user_info tuntap_user_info; +extern const struct net_user_info tuntap_user_info; #endif diff --git a/arch/um/os-Linux/drivers/tuntap_kern.c b/arch/um/os-Linux/drivers/tuntap_kern.c index 190009a6f89c..0edbac63c527 100644 --- a/arch/um/os-Linux/drivers/tuntap_kern.c +++ b/arch/um/os-Linux/drivers/tuntap_kern.c @@ -53,7 +53,7 @@ static int tuntap_write(int fd, struct sk_buff **skb, return(net_write(fd, (*skb)->data, (*skb)->len)); } -struct net_kern_info tuntap_kern_info = { +const struct net_kern_info tuntap_kern_info = { .init = tuntap_init, .protocol = eth_protocol, .read = tuntap_read, diff --git a/arch/um/os-Linux/drivers/tuntap_user.c b/arch/um/os-Linux/drivers/tuntap_user.c index 87c3aa0252db..e846b23f7558 100644 --- a/arch/um/os-Linux/drivers/tuntap_user.c +++ b/arch/um/os-Linux/drivers/tuntap_user.c @@ -205,7 +205,7 @@ static int tuntap_set_mtu(int mtu, void *data) return(mtu); } -struct net_user_info tuntap_user_info = { +const struct net_user_info tuntap_user_info = { .init = tuntap_user_init, .open = tuntap_open, .close = tuntap_close, diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c index 6987d1d247a2..cd15b9df5b5c 100644 --- a/arch/um/os-Linux/helper.c +++ b/arch/um/os-Linux/helper.c @@ -42,7 +42,7 @@ static int helper_child(void *arg) if(data->pre_exec != NULL) (*data->pre_exec)(data->pre_data); execvp(argv[0], argv); - errval = errno; + errval = -errno; printk("helper_child - execve of '%s' failed - errno = %d\n", argv[0], errno); os_write_file(data->fd, &errval, sizeof(errval)); kill(os_getpid(), SIGKILL); @@ -62,7 +62,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, stack = *stack_out; else stack = alloc_stack(0, __cant_sleep()); if(stack == 0) - return(-ENOMEM); + return -ENOMEM; ret = os_pipe(fds, 1, 0); if(ret < 0){ @@ -95,16 +95,16 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, /* Read the errno value from the child, if the exec failed, or get 0 if * the exec succeeded because the pipe fd was set as close-on-exec. */ n = os_read_file(fds[0], &ret, sizeof(ret)); - if (n < 0) { - printk("run_helper : read on pipe failed, ret = %d\n", -n); - ret = n; - kill(pid, SIGKILL); - CATCH_EINTR(waitpid(pid, NULL, 0)); - } else if(n != 0){ - CATCH_EINTR(n = waitpid(pid, NULL, 0)); - ret = -errno; - } else { + if(n == 0) ret = pid; + else { + if(n < 0){ + printk("run_helper : read on pipe failed, ret = %d\n", + -n); + ret = n; + kill(pid, SIGKILL); + } + CATCH_EINTR(waitpid(pid, NULL, 0)); } out_close: diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c index 7555bf9c33d9..a97206df5b52 100644 --- a/arch/um/os-Linux/irq.c +++ b/arch/um/os-Linux/irq.c @@ -132,7 +132,7 @@ void os_set_pollfd(int i, int fd) void os_set_ioignore(void) { - set_handler(SIGIO, SIG_IGN, 0, -1); + signal(SIGIO, SIG_IGN); } void init_irq_signals(int on_sigstack) diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c index 90912aaca7aa..d1c5670787dc 100644 --- a/arch/um/os-Linux/main.c +++ b/arch/um/os-Linux/main.c @@ -67,13 +67,32 @@ static __init void do_uml_initcalls(void) static void last_ditch_exit(int sig) { - signal(SIGINT, SIG_DFL); - signal(SIGTERM, SIG_DFL); - signal(SIGHUP, SIG_DFL); uml_cleanup(); exit(1); } +static void install_fatal_handler(int sig) +{ + struct sigaction action; + + /* All signals are enabled in this handler ... */ + sigemptyset(&action.sa_mask); + + /* ... including the signal being handled, plus we want the + * handler reset to the default behavior, so that if an exit + * handler is hanging for some reason, the UML will just die + * after this signal is sent a second time. + */ + action.sa_flags = SA_RESETHAND | SA_NODEFER; + action.sa_restorer = NULL; + action.sa_handler = last_ditch_exit; + if(sigaction(sig, &action, NULL) < 0){ + printf("failed to install handler for signal %d - errno = %d\n", + errno); + exit(1); + } +} + #define UML_LIB_PATH ":/usr/lib/uml" static void setup_env_path(void) @@ -158,9 +177,12 @@ int main(int argc, char **argv, char **envp) } new_argv[argc] = NULL; - set_handler(SIGINT, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); - set_handler(SIGTERM, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); - set_handler(SIGHUP, last_ditch_exit, SA_ONESHOT | SA_NODEFER, -1); + /* Allow these signals to bring down a UML if all other + * methods of control fail. + */ + install_fatal_handler(SIGINT); + install_fatal_handler(SIGTERM); + install_fatal_handler(SIGHUP); scan_elf_aux( envp); diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c index 560c8063c77c..b170b4704dc4 100644 --- a/arch/um/os-Linux/mem.c +++ b/arch/um/os-Linux/mem.c @@ -114,14 +114,14 @@ static void which_tmpdir(void) } while(1){ - found = next(fd, buf, sizeof(buf) / sizeof(buf[0]), ' '); + found = next(fd, buf, ARRAY_SIZE(buf), ' '); if(found != 1) break; if(!strncmp(buf, "/dev/shm", strlen("/dev/shm"))) goto found; - found = next(fd, buf, sizeof(buf) / sizeof(buf[0]), '\n'); + found = next(fd, buf, ARRAY_SIZE(buf), '\n'); if(found != 1) break; } @@ -135,7 +135,7 @@ err: return; found: - found = next(fd, buf, sizeof(buf) / sizeof(buf[0]), ' '); + found = next(fd, buf, ARRAY_SIZE(buf), ' '); if(found != 1) goto err; diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c index b98d3ca2cd1b..ff203625a4bd 100644 --- a/arch/um/os-Linux/process.c +++ b/arch/um/os-Linux/process.c @@ -7,7 +7,6 @@ #include <stdio.h> #include <errno.h> #include <signal.h> -#include <setjmp.h> #include <linux/unistd.h> #include <sys/mman.h> #include <sys/wait.h> @@ -247,7 +246,17 @@ void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)) set_sigstack(sig_stack, pages * page_size()); flags = SA_ONSTACK; } - if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1); + if(usr1_handler){ + struct sigaction sa; + + sa.sa_handler = usr1_handler; + sigemptyset(&sa.sa_mask); + sa.sa_flags = flags; + sa.sa_restorer = NULL; + if(sigaction(SIGUSR1, &sa, NULL) < 0) + panic("init_new_thread_stack - sigaction failed - " + "errno = %d\n", errno); + } } void init_new_thread_signals(void) diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c index 0ecac563c7b3..f6457765b17d 100644 --- a/arch/um/os-Linux/sigio.c +++ b/arch/um/os-Linux/sigio.c @@ -43,17 +43,9 @@ struct pollfds { /* Protected by sigio_lock(). Used by the sigio thread, but the UML thread * synchronizes with it. */ -static struct pollfds current_poll = { - .poll = NULL, - .size = 0, - .used = 0 -}; - -static struct pollfds next_poll = { - .poll = NULL, - .size = 0, - .used = 0 -}; +static struct pollfds current_poll; +static struct pollfds next_poll; +static struct pollfds all_sigio_fds; static int write_sigio_thread(void *unused) { @@ -78,7 +70,8 @@ static int write_sigio_thread(void *unused) n = os_read_file(sigio_private[1], &c, sizeof(c)); if(n != sizeof(c)) printk("write_sigio_thread : " - "read failed, err = %d\n", -n); + "read on socket failed, " + "err = %d\n", -n); tmp = current_poll; current_poll = next_poll; next_poll = tmp; @@ -93,35 +86,36 @@ static int write_sigio_thread(void *unused) n = os_write_file(respond_fd, &c, sizeof(c)); if(n != sizeof(c)) - printk("write_sigio_thread : write failed, " - "err = %d\n", -n); + printk("write_sigio_thread : write on socket " + "failed, err = %d\n", -n); } } return 0; } -static int need_poll(int n) +static int need_poll(struct pollfds *polls, int n) { - if(n <= next_poll.size){ - next_poll.used = n; - return(0); + if(n <= polls->size){ + polls->used = n; + return 0; } - kfree(next_poll.poll); - next_poll.poll = um_kmalloc_atomic(n * sizeof(struct pollfd)); - if(next_poll.poll == NULL){ + kfree(polls->poll); + polls->poll = um_kmalloc_atomic(n * sizeof(struct pollfd)); + if(polls->poll == NULL){ printk("need_poll : failed to allocate new pollfds\n"); - next_poll.size = 0; - next_poll.used = 0; - return(-1); + polls->size = 0; + polls->used = 0; + return -ENOMEM; } - next_poll.size = n; - next_poll.used = n; - return(0); + polls->size = n; + polls->used = n; + return 0; } /* Must be called with sigio_lock held, because it's needed by the marked - * critical section. */ + * critical section. + */ static void update_thread(void) { unsigned long flags; @@ -156,34 +150,39 @@ static void update_thread(void) set_signals(flags); } -static int add_sigio_fd(int fd, int read) +int add_sigio_fd(int fd) { - int err = 0, i, n, events; + struct pollfd *p; + int err = 0, i, n; sigio_lock(); + for(i = 0; i < all_sigio_fds.used; i++){ + if(all_sigio_fds.poll[i].fd == fd) + break; + } + if(i == all_sigio_fds.used) + goto out; + + p = &all_sigio_fds.poll[i]; + for(i = 0; i < current_poll.used; i++){ if(current_poll.poll[i].fd == fd) goto out; } n = current_poll.used + 1; - err = need_poll(n); + err = need_poll(&next_poll, n); if(err) goto out; for(i = 0; i < current_poll.used; i++) next_poll.poll[i] = current_poll.poll[i]; - if(read) events = POLLIN; - else events = POLLOUT; - - next_poll.poll[n - 1] = ((struct pollfd) { .fd = fd, - .events = events, - .revents = 0 }); + next_poll.poll[n - 1] = *p; update_thread(); out: sigio_unlock(); - return(err); + return err; } int ignore_sigio_fd(int fd) @@ -205,18 +204,14 @@ int ignore_sigio_fd(int fd) if(i == current_poll.used) goto out; - err = need_poll(current_poll.used - 1); + err = need_poll(&next_poll, current_poll.used - 1); if(err) goto out; for(i = 0; i < current_poll.used; i++){ p = ¤t_poll.poll[i]; - if(p->fd != fd) next_poll.poll[n++] = current_poll.poll[i]; - } - if(n == i){ - printk("ignore_sigio_fd : fd %d not found\n", fd); - err = -1; - goto out; + if(p->fd != fd) + next_poll.poll[n++] = *p; } update_thread(); @@ -234,7 +229,7 @@ static struct pollfd *setup_initial_poll(int fd) printk("setup_initial_poll : failed to allocate poll\n"); return NULL; } - *p = ((struct pollfd) { .fd = fd, + *p = ((struct pollfd) { .fd = fd, .events = POLLIN, .revents = 0 }); return p; @@ -323,6 +318,8 @@ out_close1: void maybe_sigio_broken(int fd, int read) { + int err; + if(!isatty(fd)) return; @@ -330,7 +327,19 @@ void maybe_sigio_broken(int fd, int read) return; write_sigio_workaround(); - add_sigio_fd(fd, read); + + sigio_lock(); + err = need_poll(&all_sigio_fds, all_sigio_fds.used + 1); + if(err){ + printk("maybe_sigio_broken - failed to add pollfd\n"); + goto out; + } + all_sigio_fds.poll[all_sigio_fds.used++] = + ((struct pollfd) { .fd = fd, + .events = read ? POLLIN : POLLOUT, + .revents = 0 }); +out: + sigio_unlock(); } static void sigio_cleanup(void) diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 60e4faedf254..6b81739279d1 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -15,7 +15,6 @@ #include "user.h" #include "signal_kern.h" #include "sysdep/sigcontext.h" -#include "sysdep/signal.h" #include "sigcontext.h" #include "mode.h" #include "os.h" @@ -38,18 +37,10 @@ static int signals_enabled = 1; static int pending = 0; -void sig_handler(ARCH_SIGHDLR_PARAM) +void sig_handler(int sig, struct sigcontext *sc) { - struct sigcontext *sc; int enabled; - /* Must be the first thing that this handler does - x86_64 stores - * the sigcontext in %rdx, and we need to save it before it has a - * chance to get trashed. - */ - - ARCH_GET_SIGCONTEXT(sc, sig); - enabled = signals_enabled; if(!enabled && (sig == SIGIO)){ pending |= SIGIO_MASK; @@ -64,15 +55,8 @@ void sig_handler(ARCH_SIGHDLR_PARAM) set_signals(enabled); } -extern int timer_irq_inited; - static void real_alarm_handler(int sig, struct sigcontext *sc) { - if(!timer_irq_inited){ - signals_enabled = 1; - return; - } - if(sig == SIGALRM) switch_timers(0); @@ -84,13 +68,10 @@ static void real_alarm_handler(int sig, struct sigcontext *sc) } -void alarm_handler(ARCH_SIGHDLR_PARAM) +void alarm_handler(int sig, struct sigcontext *sc) { - struct sigcontext *sc; int enabled; - ARCH_GET_SIGCONTEXT(sc, sig); - enabled = signals_enabled; if(!signals_enabled){ if(sig == SIGVTALRM) @@ -126,6 +107,10 @@ void remove_sigstack(void) panic("disabling signal stack failed, errno = %d\n", errno); } +void (*handlers[_NSIG])(int sig, struct sigcontext *sc); + +extern void hard_handler(int sig); + void set_handler(int sig, void (*handler)(int), int flags, ...) { struct sigaction action; @@ -133,13 +118,16 @@ void set_handler(int sig, void (*handler)(int), int flags, ...) sigset_t sig_mask; int mask; - va_start(ap, flags); - action.sa_handler = handler; + handlers[sig] = (void (*)(int, struct sigcontext *)) handler; + action.sa_handler = hard_handler; + sigemptyset(&action.sa_mask); - while((mask = va_arg(ap, int)) != -1){ + + va_start(ap, flags); + while((mask = va_arg(ap, int)) != -1) sigaddset(&action.sa_mask, mask); - } va_end(ap); + action.sa_flags = flags; action.sa_restorer = NULL; if(sigaction(sig, &action, NULL) < 0) diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 7baf90fda58b..cb9ab54146cc 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()); @@ -430,56 +444,22 @@ void map_stub_pages(int fd, unsigned long code, } } -void new_thread(void *stack, void **switch_buf_ptr, void **fork_buf_ptr, - void (*handler)(int)) +void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)) { - unsigned long flags; - jmp_buf switch_buf, fork_buf; - - *switch_buf_ptr = &switch_buf; - *fork_buf_ptr = &fork_buf; - - /* Somewhat subtle - siglongjmp restores the signal mask before doing - * the longjmp. This means that when jumping from one stack to another - * when the target stack has interrupts enabled, an interrupt may occur - * on the source stack. This is bad when starting up a process because - * it's not supposed to get timer ticks until it has been scheduled. - * So, we disable interrupts around the sigsetjmp to ensure that - * they can't happen until we get back here where they are safe. - */ - flags = get_signals(); - block_signals(); - if(UML_SETJMP(&fork_buf) == 0) - new_thread_proc(stack, handler); - - remove_sigstack(); - - set_signals(flags); + (*buf)[0].JB_IP = (unsigned long) handler; + (*buf)[0].JB_SP = (unsigned long) stack + + (PAGE_SIZE << UML_CONFIG_KERNEL_STACK_ORDER) - sizeof(void *); } #define INIT_JMP_NEW_THREAD 0 -#define INIT_JMP_REMOVE_SIGSTACK 1 -#define INIT_JMP_CALLBACK 2 -#define INIT_JMP_HALT 3 -#define INIT_JMP_REBOOT 4 +#define INIT_JMP_CALLBACK 1 +#define INIT_JMP_HALT 2 +#define INIT_JMP_REBOOT 3 -void thread_wait(void *sw, void *fb) +void switch_threads(jmp_buf *me, jmp_buf *you) { - jmp_buf buf, **switch_buf = sw, *fork_buf; - - *switch_buf = &buf; - fork_buf = fb; - if(UML_SETJMP(&buf) == 0) - siglongjmp(*fork_buf, INIT_JMP_REMOVE_SIGSTACK); -} - -void switch_threads(void *me, void *next) -{ - jmp_buf my_buf, **me_ptr = me, *next_buf = next; - - *me_ptr = &my_buf; - if(UML_SETJMP(&my_buf) == 0) - UML_LONGJMP(next_buf, 1); + if(UML_SETJMP(me) == 0) + UML_LONGJMP(you, 1); } static jmp_buf initial_jmpbuf; @@ -489,23 +469,21 @@ static void (*cb_proc)(void *arg); static void *cb_arg; static jmp_buf *cb_back; -int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr) +int start_idle_thread(void *stack, jmp_buf *switch_buf) { - jmp_buf **switch_buf = switch_buf_ptr; int n; set_handler(SIGWINCH, (__sighandler_t) sig_handler, SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGALRM, SIGVTALRM, -1); - *fork_buf_ptr = &initial_jmpbuf; n = UML_SETJMP(&initial_jmpbuf); switch(n){ case INIT_JMP_NEW_THREAD: - new_thread_proc((void *) stack, new_thread_handler); - break; - case INIT_JMP_REMOVE_SIGSTACK: - remove_sigstack(); + (*switch_buf)[0].JB_IP = (unsigned long) new_thread_handler; + (*switch_buf)[0].JB_SP = (unsigned long) stack + + (PAGE_SIZE << UML_CONFIG_KERNEL_STACK_ORDER) - + sizeof(void *); break; case INIT_JMP_CALLBACK: (*cb_proc)(cb_arg); @@ -520,7 +498,7 @@ int start_idle_thread(void *stack, void *switch_buf_ptr, void **fork_buf_ptr) default: panic("Bad sigsetjmp return in start_idle_thread - %d\n", n); } - UML_LONGJMP(*switch_buf, 1); + UML_LONGJMP(switch_buf, 1); } void initial_thread_cb_skas(void (*proc)(void *), void *arg) diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index 503148504009..7fe92680c7dd 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -14,7 +14,6 @@ #include <sched.h> #include <fcntl.h> #include <errno.h> -#include <setjmp.h> #include <sys/time.h> #include <sys/wait.h> #include <sys/mman.h> diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile index b3213613c41c..37806621b25d 100644 --- a/arch/um/os-Linux/sys-i386/Makefile +++ b/arch/um/os-Linux/sys-i386/Makefile @@ -3,7 +3,7 @@ # Licensed under the GPL # -obj-$(CONFIG_MODE_SKAS) = registers.o tls.o +obj-$(CONFIG_MODE_SKAS) = registers.o signal.o tls.o USER_OBJS := $(obj-y) diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c index 516f66dd87e3..7cd0369e02b3 100644 --- a/arch/um/os-Linux/sys-i386/registers.c +++ b/arch/um/os-Linux/sys-i386/registers.c @@ -5,12 +5,12 @@ #include <errno.h> #include <string.h> -#include <setjmp.h> #include "sysdep/ptrace_user.h" #include "sysdep/ptrace.h" #include "uml-config.h" #include "skas_ptregs.h" #include "registers.h" +#include "longjmp.h" #include "user.h" /* These are set once at boot time and not changed thereafter */ @@ -130,11 +130,14 @@ void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) HOST_FP_SIZE * sizeof(unsigned long)); } -void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) +unsigned long get_thread_reg(int reg, jmp_buf *buf) { - struct __jmp_buf_tag *jmpbuf = buffer; - - UPT_SET(uml_regs, EIP, jmpbuf->__jmpbuf[JB_PC]); - UPT_SET(uml_regs, UESP, jmpbuf->__jmpbuf[JB_SP]); - UPT_SET(uml_regs, EBP, jmpbuf->__jmpbuf[JB_BP]); + switch(reg){ + case EIP: return buf[0]->__eip; + case UESP: return buf[0]->__esp; + case EBP: return buf[0]->__ebp; + default: + printk("get_thread_regs - unknown register %d\n", reg); + return 0; + } } diff --git a/arch/um/os-Linux/sys-i386/signal.c b/arch/um/os-Linux/sys-i386/signal.c new file mode 100644 index 000000000000..0d3eae518352 --- /dev/null +++ b/arch/um/os-Linux/sys-i386/signal.c @@ -0,0 +1,15 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#include <signal.h> + +extern void (*handlers[])(int sig, struct sigcontext *sc); + +void hard_handler(int sig) +{ + struct sigcontext *sc = (struct sigcontext *) (&sig + 1); + + (*handlers[sig])(sig, sc); +} diff --git a/arch/um/os-Linux/sys-x86_64/Makefile b/arch/um/os-Linux/sys-x86_64/Makefile index 340ef26f5944..f67842a7735b 100644 --- a/arch/um/os-Linux/sys-x86_64/Makefile +++ b/arch/um/os-Linux/sys-x86_64/Makefile @@ -3,7 +3,7 @@ # Licensed under the GPL # -obj-$(CONFIG_MODE_SKAS) = registers.o +obj-$(CONFIG_MODE_SKAS) = registers.o signal.o USER_OBJS := $(obj-y) diff --git a/arch/um/os-Linux/sys-x86_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c index becd898d9398..cb8e8a263280 100644 --- a/arch/um/os-Linux/sys-x86_64/registers.c +++ b/arch/um/os-Linux/sys-x86_64/registers.c @@ -5,11 +5,11 @@ #include <errno.h> #include <string.h> -#include <setjmp.h> #include "ptrace_user.h" #include "uml-config.h" #include "skas_ptregs.h" #include "registers.h" +#include "longjmp.h" #include "user.h" /* These are set once at boot time and not changed thereafter */ @@ -78,11 +78,14 @@ void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) HOST_FP_SIZE * sizeof(unsigned long)); } -void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer) +unsigned long get_thread_reg(int reg, jmp_buf *buf) { - struct __jmp_buf_tag *jmpbuf = buffer; - - UPT_SET(uml_regs, RIP, jmpbuf->__jmpbuf[JB_PC]); - UPT_SET(uml_regs, RSP, jmpbuf->__jmpbuf[JB_RSP]); - UPT_SET(uml_regs, RBP, jmpbuf->__jmpbuf[JB_RBP]); + switch(reg){ + case RIP: return buf[0]->__rip; + case RSP: return buf[0]->__rsp; + case RBP: return buf[0]->__rbp; + default: + printk("get_thread_regs - unknown register %d\n", reg); + return 0; + } } diff --git a/arch/um/os-Linux/sys-x86_64/signal.c b/arch/um/os-Linux/sys-x86_64/signal.c new file mode 100644 index 000000000000..3f369e5f976b --- /dev/null +++ b/arch/um/os-Linux/sys-x86_64/signal.c @@ -0,0 +1,16 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#include <signal.h> + +extern void (*handlers[])(int sig, struct sigcontext *sc); + +void hard_handler(int sig) +{ + struct ucontext *uc; + asm("movq %%rdx, %0" : "=r" (uc)); + + (*handlers[sig])(sig, (struct sigcontext *) &uc->uc_mcontext); +} diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c index 4ae73c0e5485..38be096e750f 100644 --- a/arch/um/os-Linux/time.c +++ b/arch/um/os-Linux/time.c @@ -17,20 +17,25 @@ #include "kern_constants.h" #include "os.h" -static void set_interval(int timer_type) +int set_interval(int is_virtual) { int usec = 1000000/hz(); + int timer_type = is_virtual ? ITIMER_VIRTUAL : ITIMER_REAL; struct itimerval interval = ((struct itimerval) { { 0, usec }, { 0, usec } }); if(setitimer(timer_type, &interval, NULL) == -1) - panic("setitimer failed - errno = %d\n", errno); + return -errno; + + return 0; } +#ifdef CONFIG_MODE_TT void enable_timer(void) { - set_interval(ITIMER_VIRTUAL); + set_interval(1); } +#endif void disable_timer(void) { @@ -40,8 +45,8 @@ void disable_timer(void) printk("disnable_timer - setitimer failed, errno = %d\n", errno); /* If there are signals already queued, after unblocking ignore them */ - set_handler(SIGALRM, SIG_IGN, 0, -1); - set_handler(SIGVTALRM, SIG_IGN, 0, -1); + signal(SIGALRM, SIG_IGN); + signal(SIGVTALRM, SIG_IGN); } void switch_timers(int to_real) @@ -74,7 +79,7 @@ void uml_idle_timer(void) set_handler(SIGALRM, (__sighandler_t) alarm_handler, SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1); - set_interval(ITIMER_REAL); + set_interval(0); } #endif @@ -94,8 +99,3 @@ void idle_sleep(int secs) ts.tv_nsec = 0; nanosleep(&ts, NULL); } - -void user_time_init(void) -{ - set_interval(ITIMER_VIRTUAL); -} diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c index 90b29ae9af46..1df231a26244 100644 --- a/arch/um/os-Linux/trap.c +++ b/arch/um/os-Linux/trap.c @@ -5,7 +5,6 @@ #include <stdlib.h> #include <signal.h> -#include <setjmp.h> #include "kern_util.h" #include "user_util.h" #include "os.h" diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c index 865f6a6a2590..bbb73a650370 100644 --- a/arch/um/os-Linux/uaccess.c +++ b/arch/um/os-Linux/uaccess.c @@ -4,8 +4,7 @@ * Licensed under the GPL */ -#include <setjmp.h> -#include <string.h> +#include <stddef.h> #include "longjmp.h" unsigned long __do_user_copy(void *to, const void *from, int n, diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c index c47a2a7ce70e..3f5b1514e8a7 100644 --- a/arch/um/os-Linux/util.c +++ b/arch/um/os-Linux/util.c @@ -7,7 +7,6 @@ #include <stdlib.h> #include <unistd.h> #include <limits.h> -#include <setjmp.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/utsname.h> @@ -107,11 +106,11 @@ int setjmp_wrapper(void (*proc)(void *, void *), ...) jmp_buf buf; int n; - n = sigsetjmp(buf, 1); + n = UML_SETJMP(&buf); if(n == 0){ va_start(args, proc); (*proc)(&buf, &args); } va_end(args); - return(n); + return n; } |