diff options
Diffstat (limited to 'arch/arm/include/asm/syscall.h')
| -rw-r--r-- | arch/arm/include/asm/syscall.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h index 21927fa0ae2b..18b102a30741 100644 --- a/arch/arm/include/asm/syscall.h +++ b/arch/arm/include/asm/syscall.h @@ -68,6 +68,30 @@ static inline void syscall_set_return_value(struct task_struct *task, regs->ARM_r0 = (long) error ? error : val; } +static inline void syscall_set_nr(struct task_struct *task, + struct pt_regs *regs, + int nr) +{ + if (nr == -1) { + task_thread_info(task)->abi_syscall = -1; + /* + * When the syscall number is set to -1, the syscall will be + * skipped. In this case the syscall return value has to be + * set explicitly, otherwise the first syscall argument is + * returned as the syscall return value. + */ + syscall_set_return_value(task, regs, -ENOSYS, 0); + return; + } + if ((IS_ENABLED(CONFIG_AEABI) && !IS_ENABLED(CONFIG_OABI_COMPAT))) { + task_thread_info(task)->abi_syscall = nr; + return; + } + task_thread_info(task)->abi_syscall = + (task_thread_info(task)->abi_syscall & ~__NR_SYSCALL_MASK) | + (nr & __NR_SYSCALL_MASK); +} + #define SYSCALL_MAX_ARGS 7 static inline void syscall_get_arguments(struct task_struct *task, |