X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fum%2Fos-Linux%2Fprocess.c;fp=arch%2Fum%2Fos-Linux%2Fprocess.c;h=a0afd106f41e723425e85649eebe7cab6ca853fb;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=c8bf7727666258d23c7aec8de67d7bcbff440bcf;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index c8bf77276..a0afd106f 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -11,7 +11,7 @@
 #include <linux/unistd.h>
 #include <sys/mman.h>
 #include <sys/wait.h>
-#include <sys/mman.h>
+#include <sys/syscall.h>
 #include "ptrace_user.h"
 #include "os.h"
 #include "user.h"
@@ -21,7 +21,6 @@
 #include "kern_util.h"
 #include "longjmp.h"
 #include "skas_ptrace.h"
-#include "kern_constants.h"
 
 #define ARBITRARY_ADDR -1
 #define FAILURE_PID    -1
@@ -143,7 +142,7 @@ void os_usr1_process(int pid)
 
 int os_getpid(void)
 {
-	return syscall(__NR_getpid);
+	return(syscall(__NR_getpid));
 }
 
 int os_getpgrp(void)
@@ -187,55 +186,6 @@ int os_unmap_memory(void *addr, int len)
         return(0);
 }
 
-#ifndef MADV_REMOVE
-#define MADV_REMOVE KERNEL_MADV_REMOVE
-#endif
-
-int os_drop_memory(void *addr, int length)
-{
-	int err;
-
-	err = madvise(addr, length, MADV_REMOVE);
-	if(err < 0)
-		err = -errno;
-	return err;
-}
-
-int can_drop_memory(void)
-{
-	void *addr;
-	int fd, ok = 0;
-
-	printk("Checking host MADV_REMOVE support...");
-	fd = create_mem_file(UM_KERN_PAGE_SIZE);
-	if(fd < 0){
-		printk("Creating test memory file failed, err = %d\n", -fd);
-		goto out;
-	}
-
-	addr = mmap64(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE,
-		      MAP_SHARED, fd, 0);
-	if(addr == MAP_FAILED){
-		printk("Mapping test memory file failed, err = %d\n", -errno);
-		goto out_close;
-	}
-
-	if(madvise(addr, UM_KERN_PAGE_SIZE, MADV_REMOVE) != 0){
-		printk("MADV_REMOVE failed, err = %d\n", -errno);
-		goto out_unmap;
-	}
-
-	printk("OK\n");
-	ok = 1;
-
-out_unmap:
-	munmap(addr, UM_KERN_PAGE_SIZE);
-out_close:
-	close(fd);
-out:
-	return ok;
-}
-
 void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
 {
 	int flags = 0, pages;
@@ -248,35 +198,36 @@ void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
 	if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
 }
 
-void init_new_thread_signals(void)
+void init_new_thread_signals(int altstack)
 {
-	set_handler(SIGSEGV, (__sighandler_t) sig_handler, SA_ONSTACK,
+	int flags = altstack ? SA_ONSTACK : 0;
+
+	set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGTRAP, (__sighandler_t) sig_handler, SA_ONSTACK,
+	set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGFPE, (__sighandler_t) sig_handler, SA_ONSTACK,
+	set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGILL, (__sighandler_t) sig_handler, SA_ONSTACK,
+	set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK,
+	set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
 	set_handler(SIGUSR2, (__sighandler_t) sig_handler,
-		    SA_ONSTACK, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM,
-		    -1);
+		    flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
 	signal(SIGHUP, SIG_IGN);
 
-	init_irq_signals(1);
+	init_irq_signals(altstack);
 }
 
 int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
 {
-	jmp_buf buf;
-	int n;
+	sigjmp_buf buf;
+	int n, enable;
 
 	*jmp_ptr = &buf;
-	n = UML_SETJMP(&buf);
+	n = UML_SIGSETJMP(&buf, enable);
 	if(n != 0)
-		return n;
+		return(n);
 	(*fn)(arg);
-	return 0;
+	return(0);
 }