| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2016 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 | #include <setjmp.h> |
| 19 | |
| 20 | /* Save the current program position in ENV and return 0. */ |
| 21 | int |
| 22 | #if defined BSD_SETJMP |
| 23 | # undef setjmp |
| 24 | # define savemask 1 |
| 25 | setjmp (jmp_buf env) |
| 26 | #elif defined BSD__SETJMP |
| 27 | # undef _setjmp |
| 28 | # define savemask 0 |
| 29 | _setjmp (jmp_buf env) |
| 30 | #else |
| 31 | __sigsetjmp (jmp_buf env, int savemask) |
| 32 | #endif |
| 33 | { |
| 34 | /* Save data registers D1 through D7. */ |
| 35 | asm volatile ("movem%.l %/d1-%/d7, %0" |
| 36 | : : "m" (env[0].__jmpbuf[0].__dregs[0])); |
| 37 | |
| 38 | /* Save return address in place of register A0. */ |
| 39 | env[0].__jmpbuf[0].__aregs[0] = __builtin_return_address (0); |
| 40 | |
| 41 | /* Save address registers A1 through A5. */ |
| 42 | asm volatile ("movem%.l %/a1-%/a5, %0" |
| 43 | : : "m" (env[0].__jmpbuf[0].__aregs[1])); |
| 44 | |
| 45 | /* Save caller's FP, not our own. */ |
| 46 | env[0].__jmpbuf[0].__fp = *(int **) __builtin_frame_address (0); |
| 47 | |
| 48 | /* Save caller's SP, not our own. */ |
| 49 | env[0].__jmpbuf[0].__sp = (int *) __builtin_frame_address (0) + 2; |
| 50 | |
| 51 | #if defined __HAVE_68881__ || defined __HAVE_FPU__ |
| 52 | /* Save floating-point (68881) registers FP0 through FP7. */ |
| 53 | asm volatile ("fmovem%.x %/fp0-%/fp7, %0" |
| 54 | : : "m" (env[0].__jmpbuf[0].__fpregs[0])); |
| 55 | #elif defined (__mcffpu__) |
| 56 | asm volatile ("fmovem %/fp0-%/fp7, %0" |
| 57 | : : "m" (env[0].__jmpbuf[0].__fpregs[0])); |
| 58 | #endif |
| 59 | |
| 60 | #if IS_IN (rtld) |
| 61 | /* In ld.so we never save the signal mask. */ |
| 62 | return 0; |
| 63 | #else |
| 64 | /* Save the signal mask if requested. */ |
| 65 | return __sigjmp_save (env, savemask); |
| 66 | #endif |
| 67 | } |
| 68 | #if !defined BSD_SETJMP && !defined BSD__SETJMP |
| 69 | libc_hidden_def (__sigsetjmp) |
| 70 | #endif |