diff options
Diffstat (limited to 'include/asm-alpha/ptrace.h')
-rw-r--r-- | include/asm-alpha/ptrace.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/include/asm-alpha/ptrace.h b/include/asm-alpha/ptrace.h new file mode 100644 index 000000000000..d462c5e14c13 --- /dev/null +++ b/include/asm-alpha/ptrace.h | |||
@@ -0,0 +1,82 @@ | |||
1 | #ifndef _ASMAXP_PTRACE_H | ||
2 | #define _ASMAXP_PTRACE_H | ||
3 | |||
4 | |||
5 | /* | ||
6 | * This struct defines the way the registers are stored on the | ||
7 | * kernel stack during a system call or other kernel entry | ||
8 | * | ||
9 | * NOTE! I want to minimize the overhead of system calls, so this | ||
10 | * struct has as little information as possible. I does not have | ||
11 | * | ||
12 | * - floating point regs: the kernel doesn't change those | ||
13 | * - r9-15: saved by the C compiler | ||
14 | * | ||
15 | * This makes "fork()" and "exec()" a bit more complex, but should | ||
16 | * give us low system call latency. | ||
17 | */ | ||
18 | |||
19 | struct pt_regs { | ||
20 | unsigned long r0; | ||
21 | unsigned long r1; | ||
22 | unsigned long r2; | ||
23 | unsigned long r3; | ||
24 | unsigned long r4; | ||
25 | unsigned long r5; | ||
26 | unsigned long r6; | ||
27 | unsigned long r7; | ||
28 | unsigned long r8; | ||
29 | unsigned long r19; | ||
30 | unsigned long r20; | ||
31 | unsigned long r21; | ||
32 | unsigned long r22; | ||
33 | unsigned long r23; | ||
34 | unsigned long r24; | ||
35 | unsigned long r25; | ||
36 | unsigned long r26; | ||
37 | unsigned long r27; | ||
38 | unsigned long r28; | ||
39 | unsigned long hae; | ||
40 | /* JRP - These are the values provided to a0-a2 by PALcode */ | ||
41 | unsigned long trap_a0; | ||
42 | unsigned long trap_a1; | ||
43 | unsigned long trap_a2; | ||
44 | /* These are saved by PAL-code: */ | ||
45 | unsigned long ps; | ||
46 | unsigned long pc; | ||
47 | unsigned long gp; | ||
48 | unsigned long r16; | ||
49 | unsigned long r17; | ||
50 | unsigned long r18; | ||
51 | }; | ||
52 | |||
53 | /* | ||
54 | * This is the extended stack used by signal handlers and the context | ||
55 | * switcher: it's pushed after the normal "struct pt_regs". | ||
56 | */ | ||
57 | struct switch_stack { | ||
58 | unsigned long r9; | ||
59 | unsigned long r10; | ||
60 | unsigned long r11; | ||
61 | unsigned long r12; | ||
62 | unsigned long r13; | ||
63 | unsigned long r14; | ||
64 | unsigned long r15; | ||
65 | unsigned long r26; | ||
66 | unsigned long fp[32]; /* fp[31] is fpcr */ | ||
67 | }; | ||
68 | |||
69 | #ifdef __KERNEL__ | ||
70 | #define user_mode(regs) (((regs)->ps & 8) != 0) | ||
71 | #define instruction_pointer(regs) ((regs)->pc) | ||
72 | #define profile_pc(regs) instruction_pointer(regs) | ||
73 | extern void show_regs(struct pt_regs *); | ||
74 | |||
75 | #define alpha_task_regs(task) \ | ||
76 | ((struct pt_regs *) ((long) (task)->thread_info + 2*PAGE_SIZE) - 1) | ||
77 | |||
78 | #define force_successful_syscall_return() (alpha_task_regs(current)->r0 = 0) | ||
79 | |||
80 | #endif | ||
81 | |||
82 | #endif | ||