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authorJeff Dike <jdike@addtoit.com>2005-09-03 15:57:42 -0700
committerLinus Torvalds <torvalds@evo.osdl.org>2005-09-05 00:06:23 -0700
commite32dacb9f481fd6decb41adb28e720c923d34f54 (patch)
tree77594001f5c670380897d84367442725740383d9 /arch/um/kernel/skas/syscall.c
parent08964c565b2fe49e338ffbe4907adcc19647ef16 (diff)
downloadlinux-linaro-stable-e32dacb9f481fd6decb41adb28e720c923d34f54.tar.gz
[PATCH] uml: system call path cleanup
This merges two sets of files which had no business being split apart in the first place. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/kernel/skas/syscall.c')
-rw-r--r--arch/um/kernel/skas/syscall.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
new file mode 100644
index 000000000000..51fb94076fcf
--- /dev/null
+++ b/arch/um/kernel/skas/syscall.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/sys.h"
+#include "linux/ptrace.h"
+#include "asm/errno.h"
+#include "asm/unistd.h"
+#include "asm/ptrace.h"
+#include "asm/current.h"
+#include "sysdep/syscalls.h"
+#include "kern_util.h"
+#include "syscall.h"
+
+void handle_syscall(union uml_pt_regs *r)
+{
+ struct pt_regs *regs = container_of(r, struct pt_regs, regs);
+ long result;
+ int syscall;
+#ifdef UML_CONFIG_SYSCALL_DEBUG
+ int index;
+
+ index = record_syscall_start(UPT_SYSCALL_NR(r));
+#endif
+ syscall_trace(r, 0);
+
+ current->thread.nsyscalls++;
+ nsyscalls++;
+
+ /* This should go in the declaration of syscall, but when I do that,
+ * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing
+ * children at all, sometimes hanging when bash doesn't see the first
+ * ls exit.
+ * The assembly looks functionally the same to me. This is
+ * gcc version 4.0.1 20050727 (Red Hat 4.0.1-5)
+ * in case it's a compiler bug.
+ */
+ syscall = UPT_SYSCALL_NR(r);
+ if((syscall >= NR_syscalls) || (syscall < 0))
+ result = -ENOSYS;
+ else result = EXECUTE_SYSCALL(syscall, regs);
+
+ REGS_SET_SYSCALL_RETURN(r->skas.regs, result);
+
+ syscall_trace(r, 1);
+#ifdef UML_CONFIG_SYSCALL_DEBUG
+ record_syscall_end(index, result);
+#endif
+}