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View File 0012-linux-user-use-target_ulong.patch of Package qemu (Project home:lucidd:branches:Virtualization)

From 9a7bc05f85db8f058793c5d5709b453ad0d0542b Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Tue, 9 Oct 2012 09:06:49 +0200
Subject: [PATCH] linux-user: use target_ulong

Linux syscalls pass pointers or data length or other information of that sort
to the kernel. This is all stuff you don't want to have sign extended.
Otherwise a host 64bit variable parameter with a size parameter will extend
it to a negative number, breaking lseek for example.

Pass syscall arguments as ulong always.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 linux-user/qemu.h    | 8 ++++----
 linux-user/syscall.c | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 4edd7d0c08..25208645e9 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -196,10 +196,10 @@ abi_long memcpy_to_target(abi_ulong dest, const void *src,
 void target_set_brk(abi_ulong new_brk);
 abi_long do_brk(abi_ulong new_brk);
 void syscall_init(void);
-abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
-                    abi_long arg2, abi_long arg3, abi_long arg4,
-                    abi_long arg5, abi_long arg6, abi_long arg7,
-                    abi_long arg8);
+abi_long do_syscall(void *cpu_env, int num, abi_ulong arg1,
+                    abi_ulong arg2, abi_ulong arg3, abi_ulong arg4,
+                    abi_ulong arg5, abi_ulong arg6, abi_ulong arg7,
+                    abi_ulong arg8);
 void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 extern THREAD CPUState *thread_cpu;
 void cpu_loop(CPUArchState *env);
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index da7deec78d..dee97c05be 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7755,10 +7755,10 @@ static TargetFdTrans target_inotify_trans = {
 /* do_syscall() should always have a single exit point at the end so
    that actions, such as logging of syscall results, can be performed.
    All errnos that do_syscall() returns must be -TARGET_<errcode>. */
-abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
-                    abi_long arg2, abi_long arg3, abi_long arg4,
-                    abi_long arg5, abi_long arg6, abi_long arg7,
-                    abi_long arg8)
+abi_long do_syscall(void *cpu_env, int num, abi_ulong arg1,
+                    abi_ulong arg2, abi_ulong arg3, abi_ulong arg4,
+                    abi_ulong arg5, abi_ulong arg6, abi_ulong arg7,
+                    abi_ulong arg8)
 {
     CPUState *cpu = ENV_GET_CPU(cpu_env);
     abi_long ret;