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linux-user: Define macro for size of host kernel sigset_t

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Some host syscalls take an argument specifying the size of a
host kernel's sigset_t (which isn't necessarily the same as
that of the host libc's type of that name). Instead of hardcoding
_NSIG / 8 where we do this, define and use a SIGSET_T_SIZE macro.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2016-05-27 15:51:47 +01:00 committed by Riku Voipio
parent 9eede5b69f
commit b28a1f333a
1 changed files with 7 additions and 2 deletions
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9
linux-user/syscall.c
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@ -124,6 +124,10 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct linux_dirent [2]) #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct linux_dirent [2])
#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct linux_dirent [2]) #define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct linux_dirent [2])
/* This is the size of the host kernel's sigset_t, needed where we make
* direct system calls that take a sigset_t pointer and a size.
*/
#define SIGSET_T_SIZE (_NSIG / 8)
#undef _syscall0 #undef _syscall0
#undef _syscall1 #undef _syscall1
@ -7862,7 +7866,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
/* Extract the two packed args for the sigset */ /* Extract the two packed args for the sigset */
if (arg6) { if (arg6) {
sig_ptr = &sig; sig_ptr = &sig;
sig.size = _NSIG / 8; sig.size = SIGSET_T_SIZE;
arg7 = lock_user(VERIFY_READ, arg6, sizeof(*arg7) * 2, 1); arg7 = lock_user(VERIFY_READ, arg6, sizeof(*arg7) * 2, 1);
if (!arg7) { if (!arg7) {
@ -8916,7 +8920,8 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
set = NULL; set = NULL;
} }
ret = get_errno(sys_ppoll(pfd, nfds, timeout_ts, set, _NSIG/8)); ret = get_errno(sys_ppoll(pfd, nfds, timeout_ts,
set, SIGSET_T_SIZE));
if (!is_error(ret) && arg3) { if (!is_error(ret) && arg3) {
host_to_target_timespec(arg3, timeout_ts); host_to_target_timespec(arg3, timeout_ts);