Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_ASMAXP_PTRACE_H
3#define _UAPI_ASMAXP_PTRACE_H
4
5
6/*
7 * This struct defines the way the registers are stored on the
8 * kernel stack during a system call or other kernel entry
9 *
10 * NOTE! I want to minimize the overhead of system calls, so this
11 * struct has as little information as possible. It does not have
12 *
13 * - floating point regs: the kernel doesn't change those
14 * - r9-15: saved by the C compiler
15 *
16 * This makes "fork()" and "exec()" a bit more complex, but should
17 * give us low system call latency.
18 */
19
20struct pt_regs {
21 unsigned long r0;
22 unsigned long r1;
23 unsigned long r2;
24 unsigned long r3;
25 unsigned long r4;
26 unsigned long r5;
27 unsigned long r6;
28 unsigned long r7;
29 unsigned long r8;
30 unsigned long r19;
31 unsigned long r20;
32 unsigned long r21;
33 unsigned long r22;
34 unsigned long r23;
35 unsigned long r24;
36 unsigned long r25;
37 unsigned long r26;
38 unsigned long r27;
39 unsigned long r28;
40 unsigned long hae;
41/* JRP - These are the values provided to a0-a2 by PALcode */
42 unsigned long trap_a0;
43 unsigned long trap_a1;
44 unsigned long trap_a2;
45/* This makes the stack 16-byte aligned as GCC expects */
46 unsigned long __pad0;
47/* These are saved by PAL-code: */
48 unsigned long ps;
49 unsigned long pc;
50 unsigned long gp;
51 unsigned long r16;
52 unsigned long r17;
53 unsigned long r18;
54};
55
56/*
57 * This is the extended stack used by signal handlers and the context
58 * switcher: it's pushed after the normal "struct pt_regs".
59 */
60struct switch_stack {
61 unsigned long r9;
62 unsigned long r10;
63 unsigned long r11;
64 unsigned long r12;
65 unsigned long r13;
66 unsigned long r14;
67 unsigned long r15;
68 unsigned long r26;
69#ifndef __KERNEL__
70 unsigned long fp[32]; /* fp[31] is fpcr */
71#endif
72};
73
74
75#endif /* _UAPI_ASMAXP_PTRACE_H */