From: Alexander Graf 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 --- 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 f6f5fe5fbb553c151cb57146350c..b45b68221434e29636bb34c9f0b0 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 243ec2a1e3bde8e6b3ac48989554..61d976cca146a6deb2d74c95ec59 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -7374,10 +7374,10 @@ 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_. */ -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; @@ -10125,7 +10125,7 @@ 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; @@ -12116,10 +12116,10 @@ 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;