1 /* $NetBSD: setjmp.h,v 1.5 2013/01/11 13:56:32 matt Exp $ */
2 /* $FreeBSD: releng/12.0/sys/arm/include/setjmp.h 251517 2013-06-08 07:16:22Z andrew $ */
3
4 /*
5 * machine/setjmp.h: machine dependent setjmp-related information.
6 */
7
8 #ifndef _MACHINE_SETJMP_H_
9 #define _MACHINE_SETJMP_H_
10
11 #define _JBLEN 64 /* size, in longs, of a jmp_buf */
12
13 /*
14 * NOTE: The internal structure of a jmp_buf is *PRIVATE*
15 * This information is provided as there is software
16 * that fiddles with this with obtain the stack pointer
17 * (yes really ! and its commercial !).
18 *
19 * Description of the setjmp buffer
20 *
21 * word 0 magic number (dependent on creator)
22 * 13 fpscr vfp status control register
23 * 14 r4 register 4
24 * 15 r5 register 5
25 * 16 r6 register 6
26 * 17 r7 register 7
27 * 18 r8 register 8
28 * 19 r9 register 9
29 * 20 r10 register 10 (sl)
30 * 21 r11 register 11 (fp)
31 * 22 r12 register 12 (ip)
32 * 23 r13 register 13 (sp)
33 * 24 r14 register 14 (lr)
34 * 25 signal mask (dependent on magic)
35 * 26 (con't)
36 * 27 (con't)
37 * 28 (con't)
38 * 32-33 d8 (vfp register d8)
39 * 34-35 d9 (vfp register d9)
40 * 36-37 d10 (vfp register d10)
41 * 38-39 d11 (vfp register d11)
42 * 40-41 d12 (vfp register d12)
43 * 42-43 d13 (vfp register d13)
44 * 44-45 d14 (vfp register d14)
45 * 46-47 d15 (vfp register d15)
46 *
47 * The magic number number identifies the jmp_buf and
48 * how the buffer was created as well as providing
49 * a sanity check
50 *
51 * A side note I should mention - Please do not tamper
52 * with the floating point fields. While they are
53 * always saved and restored at the moment this cannot
54 * be garenteed especially if the compiler happens
55 * to be generating soft-float code so no fp
56 * registers will be used.
57 *
58 * Whilst this can be seen an encouraging people to
59 * use the setjmp buffer in this way I think that it
60 * is for the best then if changes occur compiles will
61 * break rather than just having new builds falling over
62 * mysteriously.
63 */
64
65 #define _JB_MAGIC__SETJMP 0x4278f500
66 #define _JB_MAGIC_SETJMP 0x4278f501
67 #define _JB_MAGIC__SETJMP_VFP 0x4278f502
68 #define _JB_MAGIC_SETJMP_VFP 0x4278f503
69
70 /* Valid for all jmp_buf's */
71
72 #define _JB_MAGIC 0
73 #define _JB_REG_FPSCR 13
74 #define _JB_REG_R4 14
75 #define _JB_REG_R5 15
76 #define _JB_REG_R6 16
77 #define _JB_REG_R7 17
78 #define _JB_REG_R8 18
79 #define _JB_REG_R9 19
80 #define _JB_REG_R10 20
81 #define _JB_REG_R11 21
82 #define _JB_REG_R12 22
83 #define _JB_REG_R13 23
84 #define _JB_REG_R14 24
85
86 /* Only valid with the _JB_MAGIC_SETJMP magic */
87
88 #define _JB_SIGMASK 25
89
90 #define _JB_REG_D8 32
91 #define _JB_REG_D9 34
92 #define _JB_REG_D10 36
93 #define _JB_REG_D11 38
94 #define _JB_REG_D12 40
95 #define _JB_REG_D13 42
96 #define _JB_REG_D14 44
97 #define _JB_REG_D15 46
98
99 #ifndef __ASSEMBLER__
100 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE
101 typedef struct _sigjmp_buf { int _sjb[_JBLEN + 1]; } sigjmp_buf[1];
102 #endif
103
104 typedef struct _jmp_buf { int _jb[_JBLEN + 1]; } jmp_buf[1];
105 #endif
106
107 #endif /* !_MACHINE_SETJMP_H_ */
Cache object: 0b0e85eb2eb749c052ed855a6e9b8916
|