diff options
Diffstat (limited to 'arch/mips/include/asm/syscall.h')
-rw-r--r-- | arch/mips/include/asm/syscall.h | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h index fc556d8..c6e9cd2 100644 --- a/arch/mips/include/asm/syscall.h +++ b/arch/mips/include/asm/syscall.h @@ -13,23 +13,35 @@ #ifndef __ASM_MIPS_SYSCALL_H #define __ASM_MIPS_SYSCALL_H +#include <linux/compiler.h> #include <uapi/linux/audit.h> #include <linux/elf-em.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/uaccess.h> #include <asm/ptrace.h> +#include <asm/unistd.h> + +#ifndef __NR_syscall /* Only defined if _MIPS_SIM == _MIPS_SIM_ABI32 */ +#define __NR_syscall 4000 +#endif static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { - return regs->regs[2]; + /* O32 ABI syscall() - Either 64-bit with O32 or 32-bit */ + if ((config_enabled(CONFIG_32BIT) || + test_tsk_thread_flag(task, TIF_32BIT_REGS)) && + (regs->regs[2] == __NR_syscall)) + return regs->regs[4]; + else + return regs->regs[2]; } static inline unsigned long mips_get_syscall_arg(unsigned long *arg, struct task_struct *task, struct pt_regs *regs, unsigned int n) { - unsigned long usp = regs->regs[29]; + unsigned long usp __maybe_unused = regs->regs[29]; switch (n) { case 0: case 1: case 2: case 3: @@ -39,14 +51,14 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg, #ifdef CONFIG_32BIT case 4: case 5: case 6: case 7: - return get_user(*arg, (int *)usp + 4 * n); + return get_user(*arg, (int *)usp + n); #endif #ifdef CONFIG_64BIT case 4: case 5: case 6: case 7: #ifdef CONFIG_MIPS32_O32 if (test_thread_flag(TIF_32BIT_REGS)) - return get_user(*arg, (int *)usp + 4 * n); + return get_user(*arg, (int *)usp + n); else #endif *arg = regs->regs[4 + n]; @@ -57,6 +69,8 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg, default: BUG(); } + + unreachable(); } static inline long syscall_get_return_value(struct task_struct *task, @@ -65,6 +79,12 @@ static inline long syscall_get_return_value(struct task_struct *task, return regs->regs[2]; } +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + /* Do nothing */ +} + static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) @@ -83,11 +103,17 @@ static inline void syscall_get_arguments(struct task_struct *task, unsigned int i, unsigned int n, unsigned long *args) { - unsigned long arg; int ret; + /* O32 ABI syscall() - Either 64-bit with O32 or 32-bit */ + if ((config_enabled(CONFIG_32BIT) || + test_tsk_thread_flag(task, TIF_32BIT_REGS)) && + (regs->regs[2] == __NR_syscall)) { + i++; + n++; + } while (n--) - ret |= mips_get_syscall_arg(&arg, task, regs, i++); + ret |= mips_get_syscall_arg(args++, task, regs, i++); /* * No way to communicate an error because this is a void function. @@ -105,7 +131,8 @@ static inline int syscall_get_arch(void) { int arch = EM_MIPS; #ifdef CONFIG_64BIT - arch |= __AUDIT_ARCH_64BIT; + if (!test_thread_flag(TIF_32BIT_REGS)) + arch |= __AUDIT_ARCH_64BIT; #endif #if defined(__LITTLE_ENDIAN) arch |= __AUDIT_ARCH_LE; |