projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| badcbf0e DM |
1 | #ifndef __ASM_SPARC_SYSCALL_H |
| 2 | #define __ASM_SPARC_SYSCALL_H | |
| 3 | ||
| 4 | #include <linux/kernel.h> | |
| 5 | #include <linux/sched.h> | |
| 6 | #include <asm/ptrace.h> | |
| 7 | ||
| e7b8e675 MF |
8 | /* |
| 9 | * The syscall table always contains 32 bit pointers since we know that the | |
| 10 | * address of the function to be called is (way) below 4GB. So the "int" | |
| 11 | * type here is what we want [need] for both 32 bit and 64 bit systems. | |
| 12 | */ | |
| 13 | extern const unsigned int sys_call_table[]; | |
| 14 | ||
| badcbf0e DM |
15 | /* The system call number is given by the user in %g1 */ |
| 16 | static inline long syscall_get_nr(struct task_struct *task, | |
| 17 | struct pt_regs *regs) | |
| 18 | { | |
| 19 | int syscall_p = pt_regs_is_syscall(regs); | |
| 20 | ||
| 21 | return (syscall_p ? regs->u_regs[UREG_G1] : -1L); | |
| 22 | } | |
| 23 | ||
| 24 | static inline void syscall_rollback(struct task_struct *task, | |
| 25 | struct pt_regs *regs) | |
| 26 | { | |
| 27 | /* XXX This needs some thought. On Sparc we don't | |
| 28 | * XXX save away the original %o0 value somewhere. | |
| 29 | * XXX Instead we hold it in register %l5 at the top | |
| 30 | * XXX level trap frame and pass this down to the signal | |
| 31 | * XXX dispatch code which is the only place that value | |
| 32 | * XXX ever was needed. | |
| 33 | */ | |
| 34 | } | |
| 35 | ||
| 36 | #ifdef CONFIG_SPARC32 | |
| 37 | static inline bool syscall_has_error(struct pt_regs *regs) | |
| 38 | { | |
| 39 | return (regs->psr & PSR_C) ? true : false; | |
| 40 | } | |
| 41 | static inline void syscall_set_error(struct pt_regs *regs) | |
| 42 | { | |
| 43 | regs->psr |= PSR_C; | |
| 44 | } | |
| 45 | static inline void syscall_clear_error(struct pt_regs *regs) | |
| 46 | { | |
| 47 | regs->psr &= ~PSR_C; | |
| 48 | } | |
| 49 | #else | |
| 50 | static inline bool syscall_has_error(struct pt_regs *regs) | |
| 51 | { | |
| 52 | return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false; | |
| 53 | } | |
| 54 | static inline void syscall_set_error(struct pt_regs *regs) | |
| 55 | { | |
| 56 | regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY); | |
| 57 | } | |
| 58 | static inline void syscall_clear_error(struct pt_regs *regs) | |
| 59 | { | |
| 60 | regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY); | |
| 61 | } | |
| 62 | #endif | |
| 63 | ||
| 64 | static inline long syscall_get_error(struct task_struct *task, | |
| 65 | struct pt_regs *regs) | |
| 66 | { | |
| 67 | long val = regs->u_regs[UREG_I0]; | |
| 68 | ||
| 69 | return (syscall_has_error(regs) ? -val : 0); | |
| 70 | } | |
| 71 | ||
| 72 | static inline long syscall_get_return_value(struct task_struct *task, | |
| 73 | struct pt_regs *regs) | |
| 74 | { | |
| 75 | long val = regs->u_regs[UREG_I0]; | |
| 76 | ||
| 77 | return val; | |
| 78 | } | |
| 79 | ||
| 80 | static inline void syscall_set_return_value(struct task_struct *task, | |
| 81 | struct pt_regs *regs, | |
| 82 | int error, long val) | |
| 83 | { | |
| 84 | if (error) { | |
| 85 | syscall_set_error(regs); | |
| 86 | regs->u_regs[UREG_I0] = -error; | |
| 87 | } else { | |
| 88 | syscall_clear_error(regs); | |
| 89 | regs->u_regs[UREG_I0] = val; | |
| 90 | } | |
| 91 | } | |
| 92 | ||
| 93 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 94 | struct pt_regs *regs, | |
| 95 | unsigned int i, unsigned int n, | |
| 96 | unsigned long *args) | |
| 97 | { | |
| 98 | int zero_extend = 0; | |
| 99 | unsigned int j; | |
| 100 | ||
| 101 | #ifdef CONFIG_SPARC64 | |
| 102 | if (test_tsk_thread_flag(task, TIF_32BIT)) | |
| 103 | zero_extend = 1; | |
| 104 | #endif | |
| 105 | ||
| 106 | for (j = 0; j < n; j++) { | |
| 107 | unsigned long val = regs->u_regs[UREG_I0 + i + j]; | |
| 108 | ||
| 109 | if (zero_extend) | |
| 110 | args[j] = (u32) val; | |
| 111 | else | |
| 112 | args[j] = val; | |
| 113 | } | |
| 114 | } | |
| 115 | ||
| 116 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 117 | struct pt_regs *regs, | |
| 118 | unsigned int i, unsigned int n, | |
| 119 | const unsigned long *args) | |
| 120 | { | |
| 121 | unsigned int j; | |
| 122 | ||
| 123 | for (j = 0; j < n; j++) | |
| 124 | regs->u_regs[UREG_I0 + i + j] = args[j]; | |
| 125 | } | |
| 126 | ||
| 127 | #endif /* __ASM_SPARC_SYSCALL_H */ |