File 0011-linux-user-use-target_ulong.patch of Package qemu-linux-user.20428

Overview Repositories Revisions Requests Users Attributes Meta

File 0011-linux-user-use-target_ulong.patch of Package qemu-linux-user.20428

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>
---
 linux-user/qemu.h    |  8 ++++----
 linux-user/syscall.c | 18 +++++++++---------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index dd5771ce0cbc140d8f797cce10ca..7e5a0fd026ab9c635b94b6e289c1 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -206,10 +206,10 @@ 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 d40c71bc389f37e0df4170db8516..5b1ad810fef85326e56c514d4740 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6929,10 +6929,10 @@ static int host_to_target_cpu_mask(const unsigned long *host_mask,
  * of syscall results, can be performed.
  * All errnos that do_syscall() returns must be -TARGET_<errcode>.
  */
-static abi_long do_syscall1(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)
+static abi_long do_syscall1(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;
@@ -9668,7 +9668,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
              */
             ret = -TARGET_EINVAL;
             if (cpu_isar_feature(aa64_sve, arm_env_get_cpu(cpu_env))
-                && arg2 >= 0 && arg2 <= 512 * 16 && !(arg2 & 15)) {
+                && arg2 <= 512 * 16 && !(arg2 & 15)) {
                 CPUARMState *env = cpu_env;
                 ARMCPU *cpu = arm_env_get_cpu(env);
                 uint32_t vq, old_vq;
@@ -11535,10 +11535,10 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
     return ret;
 }
 
-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;

Places

File 0011-linux-user-use-target_ulong.patch of Package qemu-linux-user.20428

Places