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authorGennady Sharapov <Gennady.V.Sharapov@intel.com>2006-01-08 01:01:31 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:39 -0800
commitea2ba7dc3dd3f85034e6da6abacc813d723a2ad5 (patch)
tree56f3d2a22d3ba3d91042d9a536b659b9c967dc03 /arch/um/os-Linux
parent0805d89c151b4800eade4c2f50d39c5253d7d054 (diff)
[PATCH] uml: move libc-dependent code from trap_user.c
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from trap_user.c file under os-Linux dir Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/os-Linux')
-rw-r--r--arch/um/os-Linux/Makefile8
-rw-r--r--arch/um/os-Linux/skas/Makefile10
-rw-r--r--arch/um/os-Linux/skas/trap.c73
-rw-r--r--arch/um/os-Linux/trap.c17
-rw-r--r--arch/um/os-Linux/tt.c14
5 files changed, 119 insertions, 3 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 11e30b13e31..40c7d6b1df6 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -4,11 +4,13 @@
#
obj-y = aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
- start_up.o time.o tt.o tty.o uaccess.o umid.o user_syms.o drivers/ \
- sys-$(SUBARCH)/
+ start_up.o time.o trap.o tt.o tty.o uaccess.o umid.o user_syms.o \
+ drivers/ sys-$(SUBARCH)/
+
+obj-$(CONFIG_MODE_SKAS) += skas/
USER_OBJS := aio.o elf_aux.o file.o helper.o main.o mem.o process.o signal.o \
- start_up.o time.o tt.o tty.o uaccess.o umid.o
+ start_up.o time.o trap.o tt.o tty.o uaccess.o umid.o
elf_aux.o: $(ARCH_DIR)/kernel-offsets.h
CFLAGS_elf_aux.o += -I$(objtree)/arch/um
diff --git a/arch/um/os-Linux/skas/Makefile b/arch/um/os-Linux/skas/Makefile
new file mode 100644
index 00000000000..eab5386d60a
--- /dev/null
+++ b/arch/um/os-Linux/skas/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com)
+# Licensed under the GPL
+#
+
+obj-y := trap.o
+
+USER_OBJS := trap.o
+
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
new file mode 100644
index 00000000000..818f30e9004
--- /dev/null
+++ b/arch/um/os-Linux/skas/trap.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+
+#include <signal.h>
+#include <errno.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "task.h"
+#include "sigcontext.h"
+#include "skas.h"
+#include "ptrace_user.h"
+#include "sysdep/ptrace.h"
+#include "sysdep/ptrace_user.h"
+#include "os.h"
+
+void sig_handler_common_skas(int sig, void *sc_ptr)
+{
+ struct sigcontext *sc = sc_ptr;
+ struct skas_regs *r;
+ void (*handler)(int, union uml_pt_regs *);
+ int save_errno = errno;
+ int save_user;
+
+ /* This is done because to allow SIGSEGV to be delivered inside a SEGV
+ * handler. This can happen in copy_user, and if SEGV is disabled,
+ * the process will die.
+ * XXX Figure out why this is better than SA_NODEFER
+ */
+ if(sig == SIGSEGV)
+ change_sig(SIGSEGV, 1);
+
+ r = &TASK_REGS(get_current())->skas;
+ save_user = r->is_user;
+ r->is_user = 0;
+ if ( sig == SIGFPE || sig == SIGSEGV ||
+ sig == SIGBUS || sig == SIGILL ||
+ sig == SIGTRAP ) {
+ GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
+ }
+
+ change_sig(SIGUSR1, 1);
+
+ handler = sig_info[sig];
+
+ /* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
+ if (sig != SIGIO && sig != SIGWINCH &&
+ sig != SIGVTALRM && sig != SIGALRM)
+ unblock_signals();
+
+ handler(sig, (union uml_pt_regs *) r);
+
+ errno = save_errno;
+ r->is_user = save_user;
+}
+
+extern int ptrace_faultinfo;
+
+void user_signal(int sig, union uml_pt_regs *regs, int pid)
+{
+ void (*handler)(int, union uml_pt_regs *);
+ int segv = ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
+ (sig == SIGILL) || (sig == SIGTRAP));
+
+ if (segv)
+ get_skas_faultinfo(pid, &regs->skas.faultinfo);
+
+ handler = sig_info[sig];
+ handler(sig, (union uml_pt_regs *) regs);
+
+ unblock_signals();
+}
diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c
new file mode 100644
index 00000000000..6e7841c23d2
--- /dev/null
+++ b/arch/um/os-Linux/trap.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <setjmp.h>
+#include <signal.h>
+#include "kern_util.h"
+#include "user_util.h"
+#include "os.h"
+
+void do_longjmp(void *b, int val)
+{
+ sigjmp_buf *buf = b;
+
+ siglongjmp(*buf, val);
+}
diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
index 37828e5b352..cb2648b79d0 100644
--- a/arch/um/os-Linux/tt.c
+++ b/arch/um/os-Linux/tt.c
@@ -49,6 +49,20 @@ int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
return(0);
}
+void kill_child_dead(int pid)
+{
+ kill(pid, SIGKILL);
+ kill(pid, SIGCONT);
+ do {
+ int n;
+ CATCH_EINTR(n = waitpid(pid, NULL, 0));
+ if (n > 0)
+ kill(pid, SIGCONT);
+ else
+ break;
+ } while(1);
+}
+
/*
*-------------------------
* only for tt mode (will be deleted in future...)