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

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File linux-user-use-target_ulong.patch of Package qemu (Revision f799dd787077f71ecc424442b4a3fdb2)

Currently displaying revision f799dd787077f71ecc424442b4a3fdb2 , Show latest

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 5c964389c101ce00fcffe206bc69..76d0399e82d5c2b599b9472e0743 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -227,10 +227,10 @@ 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);
 extern __thread CPUState *thread_cpu;
 void cpu_loop(CPUArchState *env);
 const char *target_strerror(int err);
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5cd29859d6ac5349f04c03996b12..9ec933bdc0078f3fc62bfd499957 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -7791,10 +7791,10 @@ 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_cpu(cpu_env);
     abi_long ret;
@@ -10578,7 +10578,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
              */
             ret = -TARGET_EINVAL;
             if (cpu_isar_feature(aa64_sve, env_archcpu(cpu_env))
-                && arg2 >= 0 && arg2 <= 512 * 16 && !(arg2 & 15)) {
+                && arg2 <= 512 * 16 && !(arg2 & 15)) {
                 CPUARMState *env = cpu_env;
                 ARMCPU *cpu = env_archcpu(env);
                 uint32_t vq, old_vq;
@@ -12610,10 +12610,10 @@ 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_cpu(cpu_env);
     abi_long ret;

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File linux-user-use-target_ulong.patch of Package qemu (Revision f799dd787077f71ecc424442b4a3fdb2)

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