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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
parent08964c565b2fe49e338ffbe4907adcc19647ef16 (diff)
[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')
-rw-r--r--arch/um/kernel/skas/Makefile2
-rw-r--r--arch/um/kernel/skas/syscall.c50
-rw-r--r--arch/um/kernel/skas/syscall_kern.c43
-rw-r--r--arch/um/kernel/skas/syscall_user.c44
4 files changed, 51 insertions, 88 deletions
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile
index d296d55ade4..db36c7c9594 100644
--- a/arch/um/kernel/skas/Makefile
+++ b/arch/um/kernel/skas/Makefile
@@ -4,7 +4,7 @@
#
obj-y := clone.o exec_kern.o mem.o mem_user.o mmu.o process.o process_kern.o \
- syscall_kern.o syscall_user.o tlb.o trap_user.o uaccess.o \
+ syscall.o tlb.o trap_user.o uaccess.o
subdir- := util
diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c
new file mode 100644
index 00000000000..51fb94076fc
--- /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
+}
diff --git a/arch/um/kernel/skas/syscall_kern.c b/arch/um/kernel/skas/syscall_kern.c
deleted file mode 100644
index bdf040ce5b8..00000000000
--- a/arch/um/kernel/skas/syscall_kern.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.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"
-
-extern syscall_handler_t *sys_call_table[];
-
-long execute_syscall_skas(void *r)
-{
- struct pt_regs *regs = r;
- long res;
- int syscall;
-
- current->thread.nsyscalls++;
- nsyscalls++;
- syscall = UPT_SYSCALL_NR(&regs->regs);
-
- if((syscall >= NR_syscalls) || (syscall < 0))
- res = -ENOSYS;
- else res = EXECUTE_SYSCALL(syscall, regs);
-
- return(res);
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
diff --git a/arch/um/kernel/skas/syscall_user.c b/arch/um/kernel/skas/syscall_user.c
deleted file mode 100644
index 6b066497014..00000000000
--- a/arch/um/kernel/skas/syscall_user.c
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
- * Licensed under the GPL
- */
-
-#include <stdlib.h>
-#include <signal.h>
-#include "kern_util.h"
-#include "uml-config.h"
-#include "syscall_user.h"
-#include "sysdep/ptrace.h"
-#include "sysdep/sigcontext.h"
-#include "skas.h"
-
-void handle_syscall(union uml_pt_regs *regs)
-{
- long result;
-#ifdef UML_CONFIG_SYSCALL_DEBUG
- int index;
-
- index = record_syscall_start(UPT_SYSCALL_NR(regs));
-#endif
-
- syscall_trace(regs, 0);
- result = execute_syscall_skas(regs);
-
- REGS_SET_SYSCALL_RETURN(regs->skas.regs, result);
-
- syscall_trace(regs, 1);
-#ifdef UML_CONFIG_SYSCALL_DEBUG
- record_syscall_end(index, result);
-#endif
-}
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only. This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */