lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* Copied from setjmp/setjmp.h, powerpc/bits/setjmp.h and modified |
| 19 | appropriately to keep backward compatible with setjmp without |
| 20 | AltiVec/VMX support. |
| 21 | |
| 22 | This file is not exported and the interfaces are private to libc. */ |
| 23 | |
| 24 | #ifndef __NOVMX_SETJMP_H |
| 25 | #define __NOVMX_SETJMP_H 1 |
| 26 | |
| 27 | #include <bits/wordsize.h> |
| 28 | |
| 29 | /* The following definitions are needed by ASM implementations of the old |
| 30 | (novmx) __longjmp/__setjmp functions. */ |
| 31 | |
| 32 | # define JB_GPR1 0 /* Also known as the stack pointer */ |
| 33 | # define JB_GPR2 1 |
| 34 | # define JB_LR 2 /* The address we will return to */ |
| 35 | # if __WORDSIZE == 64 |
| 36 | # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18*2 words total. */ |
| 37 | # define JB_CR 21 /* Condition code registers. */ |
| 38 | # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ |
| 39 | # define JB_SIZE (40 * 8) |
| 40 | # else |
| 41 | # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total. */ |
| 42 | # define JB_CR 21 /* Condition code registers. */ |
| 43 | # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ |
| 44 | # define JB_SIZE (58 * 4) |
| 45 | # endif |
| 46 | |
| 47 | #ifndef _ASM |
| 48 | /* The following definitions are needed by the novmx* implementations of |
| 49 | setjmp/longjmp/sigsetjmp/etc that wrapper __setjmp/__longjmp. */ |
| 50 | |
| 51 | # if __WORDSIZE == 64 |
| 52 | typedef long int __jmp_buf[40]; |
| 53 | # else |
| 54 | typedef long int __jmp_buf[58]; |
| 55 | # endif |
| 56 | |
| 57 | # include <bits/sigset.h> /* Get `__sigset_t'. */ |
| 58 | |
| 59 | /* Calling environment, plus possibly a saved signal mask. */ |
| 60 | typedef struct __novmx__jmp_buf_tag |
| 61 | { |
| 62 | /* NOTE: The machine-dependent definitions of `__sigsetjmp' |
| 63 | assume that a `jmp_buf' begins with a `__jmp_buf' and that |
| 64 | `__mask_was_saved' follows it. Do not move these members |
| 65 | or add others before it. */ |
| 66 | __jmp_buf __jmpbuf; /* Calling environment. */ |
| 67 | int __mask_was_saved; /* Saved the signal mask? */ |
| 68 | __sigset_t __saved_mask; /* Saved signal mask. */ |
| 69 | } __novmx__jmp_buf[1]; |
| 70 | |
| 71 | |
| 72 | /* Store the calling environment in ENV, also saving the signal mask. |
| 73 | Return 0. */ |
| 74 | extern int __novmxsetjmp (__novmx__jmp_buf __env); |
| 75 | |
| 76 | /* Store the calling environment in ENV, also saving the |
| 77 | signal mask if SAVEMASK is nonzero. Return 0. |
| 78 | This is the internal name for `sigsetjmp'. */ |
| 79 | extern int __novmx__sigsetjmp (struct __novmx__jmp_buf_tag __env[1], |
| 80 | int __savemask); |
| 81 | |
| 82 | /* Store the calling environment in ENV, not saving the signal mask. |
| 83 | Return 0. */ |
| 84 | extern int __novmx_setjmp (struct __novmx__jmp_buf_tag __env[1]); |
| 85 | |
| 86 | /* Jump to the environment saved in ENV, making the |
| 87 | `setjmp' call there return VAL, or 1 if VAL is 0. */ |
| 88 | extern void __novmxlongjmp (struct __novmx__jmp_buf_tag __env[1], int __val) |
| 89 | __attribute__ ((__noreturn__)); |
| 90 | |
| 91 | /* Same. Usually `_longjmp' is used with `_setjmp', which does not save |
| 92 | the signal mask. But it is how ENV was saved that determines whether |
| 93 | `longjmp' restores the mask; `_longjmp' is just an alias. */ |
| 94 | extern void __novmx_longjmp (struct __novmx__jmp_buf_tag __env[1], int __val) |
| 95 | __attribute__ ((__noreturn__)); |
| 96 | |
| 97 | /* Use the same type for `jmp_buf' and `sigjmp_buf'. |
| 98 | The `__mask_was_saved' flag determines whether |
| 99 | or not `longjmp' will restore the signal mask. */ |
| 100 | typedef struct __novmx__jmp_buf_tag __novmx__sigjmp_buf[1]; |
| 101 | |
| 102 | /* Jump to the environment saved in ENV, making the |
| 103 | sigsetjmp call there return VAL, or 1 if VAL is 0. |
| 104 | Restore the signal mask if that sigsetjmp call saved it. |
| 105 | This is just an alias `longjmp'. */ |
| 106 | extern void __novmxsiglongjmp (__novmx__sigjmp_buf __env, int __val) |
| 107 | __attribute__ ((__noreturn__)); |
| 108 | |
| 109 | /* Internal machine-dependent function to restore context sans signal mask. */ |
| 110 | extern void __novmx__longjmp (__jmp_buf __env, int __val) |
| 111 | __attribute__ ((__noreturn__)); |
| 112 | |
| 113 | /* Internal function to possibly save the current mask of blocked signals |
| 114 | in ENV, and always set the flag saying whether or not it was saved. |
| 115 | This is used by the machine-dependent definition of `__sigsetjmp'. |
| 116 | Always returns zero, for convenience. */ |
| 117 | extern int __novmx__sigjmp_save (__novmx__jmp_buf __env, int __savemask); |
| 118 | |
| 119 | extern void _longjmp_unwind (__novmx__jmp_buf env, int val); |
| 120 | |
| 121 | extern void __novmx__libc_siglongjmp (__novmx__sigjmp_buf env, int val) |
| 122 | __attribute__ ((noreturn)); |
| 123 | |
| 124 | extern void __novmx__libc_longjmp (__novmx__sigjmp_buf env, int val) |
| 125 | __attribute__ ((noreturn)); |
| 126 | |
| 127 | libc_hidden_proto (__novmx__libc_longjmp) |
| 128 | libc_hidden_proto (__novmx_setjmp) |
| 129 | libc_hidden_proto (__novmx__sigsetjmp) |
| 130 | #endif /* !_ASM */ |
| 131 | |
| 132 | #endif |