| /* setjmp for PowerPC64. |
| Copyright (C) 1995-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <stap-probe.h> |
| #define _ASM |
| #ifdef __NO_VMX__ |
| #include <novmxsetjmp.h> |
| #else |
| #include <jmpbuf-offsets.h> |
| #endif |
| |
| #ifndef __NO_VMX__ |
| .section ".toc","aw" |
| .LC__dl_hwcap: |
| # ifdef SHARED |
| # if IS_IN (rtld) |
| /* Inside ld.so we use the local alias to avoid runtime GOT |
| relocations. */ |
| .tc _rtld_local_ro[TC],_rtld_local_ro |
| # else |
| .tc _rtld_global_ro[TC],_rtld_global_ro |
| # endif |
| # else |
| .tc _dl_hwcap[TC],_dl_hwcap |
| # endif |
| .section ".text" |
| #endif |
| |
| .machine "altivec" |
| ENTRY (setjmp_symbol) |
| CALL_MCOUNT 1 |
| li r4,1 /* Set second argument to 1. */ |
| b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent)) |
| END (setjmp_symbol) |
| |
| #if defined SHARED && !IS_IN (rtld) && !defined __NO_VMX__ |
| /* When called from within libc we need a special version of _setjmp |
| that saves r2 since the call won't go via a plt call stub. See |
| bugz #269. __GI__setjmp is used in csu/libc-start.c when |
| HAVE_CLEANUP_JMP_BUF is defined. */ |
| ENTRY (__GI__setjmp) |
| std r2,FRAME_TOC_SAVE(r1) /* Save the callers TOC in the save area. */ |
| CALL_MCOUNT 1 |
| li r4,0 /* Set second argument to 0. */ |
| b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent)) |
| END (__GI__setjmp) |
| #endif |
| |
| ENTRY (_setjmp_symbol) |
| CALL_MCOUNT 1 |
| li r4,0 /* Set second argument to 0. */ |
| b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent)) |
| END (_setjmp_symbol) |
| libc_hidden_def (_setjmp_symbol) |
| |
| ENTRY (__sigsetjmp_symbol) |
| CALL_MCOUNT 2 |
| JUMPTARGET(GLUE(__sigsetjmp_symbol,_ent)): |
| #ifdef PTR_MANGLE |
| mr r5, r1 |
| PTR_MANGLE (r5, r6) |
| std r5,(JB_GPR1*8)(3) |
| #else |
| std r1,(JB_GPR1*8)(3) |
| #endif |
| mflr r0 |
| #if defined SHARED && !IS_IN (rtld) |
| ld r5,FRAME_TOC_SAVE(r1) /* Retrieve the callers TOC. */ |
| std r5,(JB_GPR2*8)(3) |
| #else |
| std r2,(JB_GPR2*8)(3) |
| #endif |
| /* setjmp probe expects longjmp first argument (8@3), second argument |
| (-4@4), and target address (8@0), respectively. */ |
| LIBC_PROBE (setjmp, 3, 8@3, -4@4, 8@0) |
| std r14,((JB_GPRS+0)*8)(3) |
| stfd fp14,((JB_FPRS+0)*8)(3) |
| #ifdef PTR_MANGLE |
| PTR_MANGLE2 (r0, r6) |
| #endif |
| std r0,(JB_LR*8)(3) |
| std r15,((JB_GPRS+1)*8)(3) |
| stfd fp15,((JB_FPRS+1)*8)(3) |
| mfcr r0 |
| std r16,((JB_GPRS+2)*8)(3) |
| stfd fp16,((JB_FPRS+2)*8)(3) |
| stw r0,((JB_CR*8)+4)(3) /* 32-bit CR. */ |
| std r17,((JB_GPRS+3)*8)(3) |
| stfd fp17,((JB_FPRS+3)*8)(3) |
| std r18,((JB_GPRS+4)*8)(3) |
| stfd fp18,((JB_FPRS+4)*8)(3) |
| std r19,((JB_GPRS+5)*8)(3) |
| stfd fp19,((JB_FPRS+5)*8)(3) |
| std r20,((JB_GPRS+6)*8)(3) |
| stfd fp20,((JB_FPRS+6)*8)(3) |
| std r21,((JB_GPRS+7)*8)(3) |
| stfd fp21,((JB_FPRS+7)*8)(3) |
| std r22,((JB_GPRS+8)*8)(3) |
| stfd fp22,((JB_FPRS+8)*8)(3) |
| std r23,((JB_GPRS+9)*8)(3) |
| stfd fp23,((JB_FPRS+9)*8)(3) |
| std r24,((JB_GPRS+10)*8)(3) |
| stfd fp24,((JB_FPRS+10)*8)(3) |
| std r25,((JB_GPRS+11)*8)(3) |
| stfd fp25,((JB_FPRS+11)*8)(3) |
| std r26,((JB_GPRS+12)*8)(3) |
| stfd fp26,((JB_FPRS+12)*8)(3) |
| std r27,((JB_GPRS+13)*8)(3) |
| stfd fp27,((JB_FPRS+13)*8)(3) |
| std r28,((JB_GPRS+14)*8)(3) |
| stfd fp28,((JB_FPRS+14)*8)(3) |
| std r29,((JB_GPRS+15)*8)(3) |
| stfd fp29,((JB_FPRS+15)*8)(3) |
| std r30,((JB_GPRS+16)*8)(3) |
| stfd fp30,((JB_FPRS+16)*8)(3) |
| std r31,((JB_GPRS+17)*8)(3) |
| stfd fp31,((JB_FPRS+17)*8)(3) |
| #ifndef __NO_VMX__ |
| ld r6,.LC__dl_hwcap@toc(r2) |
| # ifdef SHARED |
| /* Load _rtld-global._dl_hwcap. */ |
| ld r6,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r6) |
| # else |
| ld r6,0(r6) /* Load extern _dl_hwcap. */ |
| # endif |
| andis. r6,r6,(PPC_FEATURE_HAS_ALTIVEC >> 16) |
| beq L(no_vmx) |
| la r5,((JB_VRS)*8)(3) |
| andi. r6,r5,0xf |
| mfspr r0,VRSAVE |
| stw r0,((JB_VRSAVE)*8)(3) /* 32-bit VRSAVE. */ |
| addi r6,r5,16 |
| beq+ L(aligned_save_vmx) |
| |
| lvsr v0,0,r5 |
| lvsl v1,0,r5 |
| addi r6,r5,-16 |
| |
| # define save_misaligned_vmx(savevr,prevvr,shiftvr,tmpvr,savegpr,addgpr) \ |
| addi addgpr,addgpr,32; \ |
| vperm tmpvr,prevvr,savevr,shiftvr; \ |
| stvx tmpvr,0,savegpr |
| |
| /* |
| * We have to be careful not to corrupt the data below v20 and |
| * above v31. To keep things simple we just rotate both ends in |
| * the opposite direction to our main permute so we can use |
| * the common macro. |
| */ |
| |
| /* load and rotate data below v20 */ |
| lvx v2,0,r5 |
| vperm v2,v2,v2,v1 |
| save_misaligned_vmx(v20,v2,v0,v3,r5,r6) |
| save_misaligned_vmx(v21,v20,v0,v3,r6,r5) |
| save_misaligned_vmx(v22,v21,v0,v3,r5,r6) |
| save_misaligned_vmx(v23,v22,v0,v3,r6,r5) |
| save_misaligned_vmx(v24,v23,v0,v3,r5,r6) |
| save_misaligned_vmx(v25,v24,v0,v3,r6,r5) |
| save_misaligned_vmx(v26,v25,v0,v3,r5,r6) |
| save_misaligned_vmx(v27,v26,v0,v3,r6,r5) |
| save_misaligned_vmx(v28,v27,v0,v3,r5,r6) |
| save_misaligned_vmx(v29,v28,v0,v3,r6,r5) |
| save_misaligned_vmx(v30,v29,v0,v3,r5,r6) |
| save_misaligned_vmx(v31,v30,v0,v3,r6,r5) |
| /* load and rotate data above v31 */ |
| lvx v2,0,r6 |
| vperm v2,v2,v2,v1 |
| save_misaligned_vmx(v2,v31,v0,v3,r5,r6) |
| |
| b L(no_vmx) |
| |
| L(aligned_save_vmx): |
| stvx 20,0,r5 |
| addi r5,r5,32 |
| stvx 21,0,r6 |
| addi r6,r6,32 |
| stvx 22,0,r5 |
| addi r5,r5,32 |
| stvx 23,0,r6 |
| addi r6,r6,32 |
| stvx 24,0,r5 |
| addi r5,r5,32 |
| stvx 25,0,r6 |
| addi r6,r6,32 |
| stvx 26,0,r5 |
| addi r5,r5,32 |
| stvx 27,0,r6 |
| addi r6,r6,32 |
| stvx 28,0,r5 |
| addi r5,r5,32 |
| stvx 29,0,r6 |
| addi r6,r6,32 |
| stvx 30,0,r5 |
| stvx 31,0,r6 |
| L(no_vmx): |
| #else |
| li r6,0 |
| #endif |
| #if IS_IN (rtld) |
| li r3,0 |
| blr |
| #elif defined SHARED |
| b JUMPTARGET (__sigjmp_save_symbol) |
| #else |
| mflr r0 |
| std r0,FRAME_LR_SAVE(r1) |
| stdu r1,-FRAME_MIN_SIZE(r1) |
| cfi_adjust_cfa_offset(FRAME_MIN_SIZE) |
| cfi_offset(lr,FRAME_LR_SAVE) |
| bl JUMPTARGET (__sigjmp_save_symbol) |
| nop |
| ld r0,FRAME_MIN_SIZE+FRAME_LR_SAVE(r1) |
| addi r1,r1,FRAME_MIN_SIZE |
| mtlr r0 |
| blr |
| #endif |
| END (__sigsetjmp_symbol) |
| |
| #if defined SHARED && !IS_IN (rtld) && !defined __NO_VMX__ |
| /* When called from within libc we need a special version of __sigsetjmp |
| that saves r2 since the call won't go via a plt call stub. See |
| bugz #269. */ |
| ENTRY (__GI___sigsetjmp) |
| std r2,FRAME_TOC_SAVE(r1) /* Save the callers TOC in the save area. */ |
| CALL_MCOUNT 1 |
| b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent)) |
| END (__GI___sigsetjmp) |
| #endif |
