| 1 | /* setjmp for PowerPC. |
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| 2 | Copyright (C) 1995-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <sysdep.h> |
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| 20 | #include <pointer_guard.h> |
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| 21 | #include <stap-probe.h> |
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| 22 | #define _ASM |
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| 23 | #ifdef __NO_VMX__ |
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| 24 | # include <novmxsetjmp.h> |
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| 25 | #else |
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| 26 | # include <jmpbuf-offsets.h> |
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| 27 | #endif |
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| 28 | |
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| 29 | .machine "altivec" |
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| 30 | ENTRY (__sigsetjmp_symbol) |
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| 31 | |
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| 32 | #ifdef PTR_MANGLE |
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| 33 | mr r5,r1 |
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| 34 | PTR_MANGLE(r5, r6) |
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| 35 | stw r5,(JB_GPR1*4)(3) |
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| 36 | #else |
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| 37 | stw r1,(JB_GPR1*4)(3) |
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| 38 | #endif |
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| 39 | mflr r0 |
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| 40 | /* setjmp probe expects longjmp first argument (4@3), second argument |
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| 41 | (-4@4), and target address (4@0), respectively. */ |
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| 42 | LIBC_PROBE (setjmp, 3, 4@3, -4@4, 4@0) |
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| 43 | stw r14,((JB_GPRS+0)*4)(3) |
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| 44 | stfd fp14,((JB_FPRS+0*2)*4)(3) |
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| 45 | #ifdef PTR_MANGLE |
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| 46 | PTR_MANGLE2 (r0, r6) |
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| 47 | #endif |
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| 48 | stw r0,(JB_LR*4)(3) |
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| 49 | stw r15,((JB_GPRS+1)*4)(3) |
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| 50 | stfd fp15,((JB_FPRS+1*2)*4)(3) |
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| 51 | mfcr r0 |
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| 52 | stw r16,((JB_GPRS+2)*4)(3) |
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| 53 | stfd fp16,((JB_FPRS+2*2)*4)(3) |
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| 54 | stw r0,(JB_CR*4)(3) |
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| 55 | stw r17,((JB_GPRS+3)*4)(3) |
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| 56 | stfd fp17,((JB_FPRS+3*2)*4)(3) |
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| 57 | stw r18,((JB_GPRS+4)*4)(3) |
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| 58 | stfd fp18,((JB_FPRS+4*2)*4)(3) |
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| 59 | stw r19,((JB_GPRS+5)*4)(3) |
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| 60 | stfd fp19,((JB_FPRS+5*2)*4)(3) |
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| 61 | stw r20,((JB_GPRS+6)*4)(3) |
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| 62 | stfd fp20,((JB_FPRS+6*2)*4)(3) |
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| 63 | stw r21,((JB_GPRS+7)*4)(3) |
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| 64 | stfd fp21,((JB_FPRS+7*2)*4)(3) |
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| 65 | stw r22,((JB_GPRS+8)*4)(3) |
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| 66 | stfd fp22,((JB_FPRS+8*2)*4)(3) |
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| 67 | stw r23,((JB_GPRS+9)*4)(3) |
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| 68 | stfd fp23,((JB_FPRS+9*2)*4)(3) |
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| 69 | stw r24,((JB_GPRS+10)*4)(3) |
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| 70 | stfd fp24,((JB_FPRS+10*2)*4)(3) |
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| 71 | stw r25,((JB_GPRS+11)*4)(3) |
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| 72 | stfd fp25,((JB_FPRS+11*2)*4)(3) |
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| 73 | stw r26,((JB_GPRS+12)*4)(3) |
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| 74 | stfd fp26,((JB_FPRS+12*2)*4)(3) |
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| 75 | stw r27,((JB_GPRS+13)*4)(3) |
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| 76 | stfd fp27,((JB_FPRS+13*2)*4)(3) |
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| 77 | stw r28,((JB_GPRS+14)*4)(3) |
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| 78 | stfd fp28,((JB_FPRS+14*2)*4)(3) |
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| 79 | stw r29,((JB_GPRS+15)*4)(3) |
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| 80 | stfd fp29,((JB_FPRS+15*2)*4)(3) |
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| 81 | stw r30,((JB_GPRS+16)*4)(3) |
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| 82 | stfd fp30,((JB_FPRS+16*2)*4)(3) |
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| 83 | stw r31,((JB_GPRS+17)*4)(3) |
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| 84 | stfd fp31,((JB_FPRS+17*2)*4)(3) |
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| 85 | #ifndef __NO_VMX__ |
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| 86 | # ifdef PIC |
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| 87 | mflr r6 |
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| 88 | cfi_register(lr,r6) |
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| 89 | SETUP_GOT_ACCESS(r5,got_label) |
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| 90 | addis r5,r5,_GLOBAL_OFFSET_TABLE_-got_label@ha |
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| 91 | addi r5,r5,_GLOBAL_OFFSET_TABLE_-got_label@l |
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| 92 | mtlr r6 |
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| 93 | cfi_same_value (lr) |
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| 94 | # ifdef SHARED |
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| 95 | # if IS_IN (rtld) |
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| 96 | /* Inside ld.so we use the local alias to avoid runtime GOT |
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| 97 | relocations. */ |
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| 98 | lwz r5,_rtld_local_ro@got(r5) |
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| 99 | # else |
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| 100 | lwz r5,_rtld_global_ro@got(r5) |
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| 101 | # endif |
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| 102 | lwz r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+LOWORD(r5) |
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| 103 | # else |
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| 104 | lwz r5,_dl_hwcap@got(r5) |
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| 105 | lwz r5,LOWORD(r5) |
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| 106 | # endif |
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| 107 | # else |
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| 108 | lis r6,(_dl_hwcap+LOWORD)@ha |
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| 109 | lwz r5,(_dl_hwcap+LOWORD)@l(r6) |
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| 110 | # endif |
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| 111 | andis. r5,r5,(PPC_FEATURE_HAS_ALTIVEC >> 16) |
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| 112 | beq L(no_vmx) |
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| 113 | la r5,((JB_VRS)*4)(3) |
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| 114 | andi. r6,r5,0xf |
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| 115 | mfspr r0,VRSAVE |
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| 116 | stw r0,((JB_VRSAVE)*4)(3) |
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| 117 | addi r6,r5,16 |
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| 118 | beq+ L(aligned_save_vmx) |
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| 119 | |
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| 120 | lvsr v0,0,r5 |
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| 121 | lvsl v1,0,r5 |
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| 122 | addi r6,r5,-16 |
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| 123 | |
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| 124 | # define save_misaligned_vmx(savevr,prevvr,shiftvr,tmpvr,savegpr,addgpr) \ |
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| 125 | addi addgpr,addgpr,32; \ |
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| 126 | vperm tmpvr,prevvr,savevr,shiftvr; \ |
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| 127 | stvx tmpvr,0,savegpr |
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| 128 | |
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| 129 | /* |
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| 130 | * We have to be careful not to corrupt the data below v20 and |
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| 131 | * above v31. To keep things simple we just rotate both ends in |
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| 132 | * the opposite direction to our main permute so we can use |
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| 133 | * the common macro. |
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| 134 | */ |
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| 135 | |
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| 136 | /* load and rotate data below v20 */ |
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| 137 | lvx v2,0,r5 |
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| 138 | vperm v2,v2,v2,v1 |
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| 139 | save_misaligned_vmx(v20,v2,v0,v3,r5,r6) |
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| 140 | save_misaligned_vmx(v21,v20,v0,v3,r6,r5) |
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| 141 | save_misaligned_vmx(v22,v21,v0,v3,r5,r6) |
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| 142 | save_misaligned_vmx(v23,v22,v0,v3,r6,r5) |
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| 143 | save_misaligned_vmx(v24,v23,v0,v3,r5,r6) |
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| 144 | save_misaligned_vmx(v25,v24,v0,v3,r6,r5) |
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| 145 | save_misaligned_vmx(v26,v25,v0,v3,r5,r6) |
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| 146 | save_misaligned_vmx(v27,v26,v0,v3,r6,r5) |
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| 147 | save_misaligned_vmx(v28,v27,v0,v3,r5,r6) |
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| 148 | save_misaligned_vmx(v29,v28,v0,v3,r6,r5) |
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| 149 | save_misaligned_vmx(v30,v29,v0,v3,r5,r6) |
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| 150 | save_misaligned_vmx(v31,v30,v0,v3,r6,r5) |
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| 151 | /* load and rotate data above v31 */ |
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| 152 | lvx v2,0,r6 |
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| 153 | vperm v2,v2,v2,v1 |
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| 154 | save_misaligned_vmx(v2,v31,v0,v3,r5,r6) |
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| 155 | |
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| 156 | b L(no_vmx) |
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| 157 | |
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| 158 | L(aligned_save_vmx): |
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| 159 | stvx 20,0,r5 |
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| 160 | addi r5,r5,32 |
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| 161 | stvx 21,0,r6 |
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| 162 | addi r6,r6,32 |
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| 163 | stvx 22,0,r5 |
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| 164 | addi r5,r5,32 |
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| 165 | stvx 23,0,r6 |
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| 166 | addi r6,r6,32 |
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| 167 | stvx 24,0,r5 |
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| 168 | addi r5,r5,32 |
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| 169 | stvx 25,0,r6 |
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| 170 | addi r6,r6,32 |
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| 171 | stvx 26,0,r5 |
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| 172 | addi r5,r5,32 |
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| 173 | stvx 27,0,r6 |
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| 174 | addi r6,r6,32 |
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| 175 | stvx 28,0,r5 |
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| 176 | addi r5,r5,32 |
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| 177 | stvx 29,0,r6 |
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| 178 | addi r6,r6,32 |
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| 179 | stvx 30,0,r5 |
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| 180 | stvx 31,0,r6 |
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| 181 | L(no_vmx): |
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| 182 | #endif |
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| 183 | b __sigjmp_save_symbol@local |
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| 184 | END (__sigsetjmp_symbol) |
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| 185 | |
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