| 1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library. If not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <setjmp.h> |
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| 19 | |
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| 20 | /* Save the current program position in ENV and return 0. */ |
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| 21 | int |
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| 22 | inhibit_stack_protector |
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| 23 | #if defined BSD_SETJMP |
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| 24 | # undef setjmp |
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| 25 | # define savemask 1 |
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| 26 | setjmp (jmp_buf env) |
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| 27 | #elif defined BSD__SETJMP |
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| 28 | # undef _setjmp |
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| 29 | # define savemask 0 |
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| 30 | _setjmp (jmp_buf env) |
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| 31 | #else |
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| 32 | __sigsetjmp (jmp_buf env, int savemask) |
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| 33 | #endif |
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| 34 | { |
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| 35 | /* Save data registers D1 through D7. */ |
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| 36 | asm volatile ("movem%.l %/d1-%/d7, %0" |
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| 37 | : : "m" (env[0].__jmpbuf[0].__dregs[0])); |
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| 38 | |
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| 39 | /* Save return address in place of register A0. */ |
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| 40 | env[0].__jmpbuf[0].__aregs[0] = __builtin_return_address (0); |
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| 41 | |
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| 42 | /* Save address registers A1 through A5. */ |
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| 43 | asm volatile ("movem%.l %/a1-%/a5, %0" |
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| 44 | : : "m" (env[0].__jmpbuf[0].__aregs[1])); |
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| 45 | |
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| 46 | /* Save caller's FP, not our own. */ |
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| 47 | env[0].__jmpbuf[0].__fp = *(int **) __builtin_frame_address (0); |
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| 48 | |
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| 49 | /* Save caller's SP, not our own. */ |
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| 50 | env[0].__jmpbuf[0].__sp = (int *) __builtin_frame_address (0) + 2; |
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| 51 | |
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| 52 | #if defined __HAVE_68881__ || defined __HAVE_FPU__ |
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| 53 | /* Save floating-point (68881) registers FP0 through FP7. */ |
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| 54 | asm volatile ("fmovem%.x %/fp0-%/fp7, %0" |
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| 55 | : : "m" (env[0].__jmpbuf[0].__fpregs[0])); |
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| 56 | #elif defined (__mcffpu__) |
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| 57 | asm volatile ("fmovem %/fp0-%/fp7, %0" |
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| 58 | : : "m" (env[0].__jmpbuf[0].__fpregs[0])); |
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| 59 | #endif |
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| 60 | |
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| 61 | #if IS_IN (rtld) |
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| 62 | /* In ld.so we never save the signal mask. */ |
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| 63 | return 0; |
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| 64 | #else |
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| 65 | /* Save the signal mask if requested. */ |
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| 66 | return __sigjmp_save (env: env, savemask); |
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| 67 | #endif |
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| 68 | } |
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| 69 | #if !defined BSD_SETJMP && !defined BSD__SETJMP |
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| 70 | libc_hidden_def (__sigsetjmp) |
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| 71 | #endif |
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| 72 | |
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