File linux-user-use-target_ulong.patch of Package qemu

From: Alexander Graf <agraf@suse.de>
Date: Tue, 9 Oct 2012 09:06:49 +0200
Subject: 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>
[JRZ: changes from linux-user/qemu.h wass moved to linux-user/user-internals.h]
Signed-off-by: Jose R Ziviani <jziviani@suse.de>
[DF: Forward port, i.e., use ulong for do_prctl too]
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
---
 linux-user/syscall.c        | 20 ++++++++++----------
 linux-user/user-internals.h |  8 ++++----
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index b746511fe5ba1c03cf44a14ed811..de782620fe3c9169a58e442a6f05 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6405,8 +6405,8 @@ static abi_long do_prctl_inval1(CPUArchState *env, abi_long arg2)
 #define do_prctl_sme_set_vl do_prctl_inval1
 #endif
 
-static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2,
-                         abi_long arg3, abi_long arg4, abi_long arg5)
+static abi_long do_prctl(CPUArchState *env, abi_ulong option, abi_ulong arg2,
+                         abi_ulong arg3, abi_ulong arg4, abi_ulong arg5)
 {
     abi_long ret;
 
@@ -8581,10 +8581,10 @@ _syscall2(int, pivot_root, const char *, new_root, const char *, put_old)
  * of syscall results, can be performed.
  * All errnos that do_syscall() returns must be -TARGET_<errcode>.
  */
-static abi_long do_syscall1(CPUArchState *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)
+static abi_long do_syscall1(CPUArchState *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_cpu(cpu_env);
     abi_long ret;
@@ -13203,10 +13203,10 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
     return ret;
 }
 
-abi_long do_syscall(CPUArchState *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(CPUArchState *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_cpu(cpu_env);
     abi_long ret;
diff --git a/linux-user/user-internals.h b/linux-user/user-internals.h
index 0280e76addda504ea9745a17324b..1026e09da8caecf3e74159ea319e 100644
--- a/linux-user/user-internals.h
+++ b/linux-user/user-internals.h
@@ -59,10 +59,10 @@ int info_is_fdpic(struct image_info *info);
 
 void target_set_brk(abi_ulong new_brk);
 void syscall_init(void);
-abi_long do_syscall(CPUArchState *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(CPUArchState *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);
 extern __thread CPUState *thread_cpu;
 G_NORETURN void cpu_loop(CPUArchState *env);
 abi_long get_errno(abi_long ret);