2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
13 #include <linux/compiler.h>
14 #include <linux/linkage.h>
15 #include <linux/types.h>
16 #include <asm/isadep.h>
17 #include <uapi/asm/ptrace.h>
20 * This struct defines the way the registers are stored on the stack during a
21 * system call/exception. As usual the registers k0/k1 aren't being saved.
25 /* Pad bytes for argument save space on the stack. */
26 unsigned long pad0
[6];
29 /* Saved main processor registers. */
30 unsigned long regs
[32];
32 /* Saved special registers. */
33 unsigned long cp0_status
;
36 #ifdef CONFIG_CPU_HAS_SMARTMIPS
39 unsigned long cp0_badvaddr
;
40 unsigned long cp0_cause
;
41 unsigned long cp0_epc
;
42 #ifdef CONFIG_CPU_CAVIUM_OCTEON
43 unsigned long long mpl
[3]; /* MTM{0,1,2} */
44 unsigned long long mtp
[3]; /* MTP{0,1,2} */
50 extern int ptrace_getregs(struct task_struct
*child
, __s64 __user
*data
);
51 extern int ptrace_setregs(struct task_struct
*child
, __s64 __user
*data
);
53 extern int ptrace_getfpregs(struct task_struct
*child
, __u32 __user
*data
);
54 extern int ptrace_setfpregs(struct task_struct
*child
, __u32 __user
*data
);
56 extern int ptrace_get_watch_regs(struct task_struct
*child
,
57 struct pt_watch_regs __user
*addr
);
58 extern int ptrace_set_watch_regs(struct task_struct
*child
,
59 struct pt_watch_regs __user
*addr
);
62 * Does the process account for user or for system time?
64 #define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
66 static inline int is_syscall_success(struct pt_regs
*regs
)
68 return !regs
->regs
[7];
71 static inline long regs_return_value(struct pt_regs
*regs
)
73 if (is_syscall_success(regs
))
76 return -regs
->regs
[2];
79 #define instruction_pointer(regs) ((regs)->cp0_epc)
80 #define profile_pc(regs) instruction_pointer(regs)
82 extern asmlinkage
long syscall_trace_enter(struct pt_regs
*regs
, long syscall
);
83 extern asmlinkage
void syscall_trace_leave(struct pt_regs
*regs
);
85 extern void die(const char *, struct pt_regs
*) __noreturn
;
87 static inline void die_if_kernel(const char *str
, struct pt_regs
*regs
)
89 if (unlikely(!user_mode(regs
)))
93 #define current_pt_regs() \
95 unsigned long sp = (unsigned long)__builtin_frame_address(0); \
96 (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
99 /* Helpers for working with the user stack pointer */
101 static inline unsigned long user_stack_pointer(struct pt_regs
*regs
)
103 return regs
->regs
[29];
106 static inline void user_stack_pointer_set(struct pt_regs
*regs
,
109 regs
->regs
[29] = val
;
112 #endif /* _ASM_PTRACE_H */
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