1 /* setjmp for PowerPC64.
2 Copyright (C) 1995-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
20 #include <pointer_guard.h>
21 #include <stap-probe.h>
24 #include <novmxsetjmp.h>
26 #include <jmpbuf-offsets.h>
34 /* Inside ld.so we use the local alias to avoid runtime GOT
36 .tc _rtld_local_ro[TC],_rtld_local_ro
38 .tc _rtld_global_ro[TC],_rtld_global_ro
41 .tc _dl_hwcap[TC],_dl_hwcap
49 li r4,1 /* Set second argument to 1. */
50 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
53 #if defined SHARED && !IS_IN (rtld) && !defined __NO_VMX__
54 /* When called from within libc we need a special version of _setjmp
55 that saves r2 since the call won't go via a plt call stub. See
56 bugz #269. __GI__setjmp is used in csu/libc-start.c when
57 HAVE_CLEANUP_JMP_BUF is defined. */
59 std r2,FRAME_TOC_SAVE(r1) /* Save the callers TOC in the save area. */
61 li r4,0 /* Set second argument to 0. */
62 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
66 ENTRY (_setjmp_symbol)
68 li r4,0 /* Set second argument to 0. */
69 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
71 libc_hidden_def (_setjmp_symbol)
73 ENTRY (__sigsetjmp_symbol)
75 JUMPTARGET(GLUE(__sigsetjmp_symbol,_ent)):
84 #if defined SHARED && !IS_IN (rtld)
85 ld r5,FRAME_TOC_SAVE(r1) /* Retrieve the callers TOC. */
90 /* setjmp probe expects longjmp first argument (8@3), second argument
91 (-4@4), and target address (8@0), respectively. */
92 LIBC_PROBE (setjmp, 3, 8@3, -4@4, 8@0)
93 std r14,((JB_GPRS+0)*8)(3)
94 stfd fp14,((JB_FPRS+0)*8)(3)
99 std r15,((JB_GPRS+1)*8)(3)
100 stfd fp15,((JB_FPRS+1)*8)(3)
102 std r16,((JB_GPRS+2)*8)(3)
103 stfd fp16,((JB_FPRS+2)*8)(3)
104 stw r0,((JB_CR*8)+4)(3) /* 32-bit CR. */
105 std r17,((JB_GPRS+3)*8)(3)
106 stfd fp17,((JB_FPRS+3)*8)(3)
107 std r18,((JB_GPRS+4)*8)(3)
108 stfd fp18,((JB_FPRS+4)*8)(3)
109 std r19,((JB_GPRS+5)*8)(3)
110 stfd fp19,((JB_FPRS+5)*8)(3)
111 std r20,((JB_GPRS+6)*8)(3)
112 stfd fp20,((JB_FPRS+6)*8)(3)
113 std r21,((JB_GPRS+7)*8)(3)
114 stfd fp21,((JB_FPRS+7)*8)(3)
115 std r22,((JB_GPRS+8)*8)(3)
116 stfd fp22,((JB_FPRS+8)*8)(3)
117 std r23,((JB_GPRS+9)*8)(3)
118 stfd fp23,((JB_FPRS+9)*8)(3)
119 std r24,((JB_GPRS+10)*8)(3)
120 stfd fp24,((JB_FPRS+10)*8)(3)
121 std r25,((JB_GPRS+11)*8)(3)
122 stfd fp25,((JB_FPRS+11)*8)(3)
123 std r26,((JB_GPRS+12)*8)(3)
124 stfd fp26,((JB_FPRS+12)*8)(3)
125 std r27,((JB_GPRS+13)*8)(3)
126 stfd fp27,((JB_FPRS+13)*8)(3)
127 std r28,((JB_GPRS+14)*8)(3)
128 stfd fp28,((JB_FPRS+14)*8)(3)
129 std r29,((JB_GPRS+15)*8)(3)
130 stfd fp29,((JB_FPRS+15)*8)(3)
131 std r30,((JB_GPRS+16)*8)(3)
132 stfd fp30,((JB_FPRS+16)*8)(3)
133 std r31,((JB_GPRS+17)*8)(3)
134 stfd fp31,((JB_FPRS+17)*8)(3)
136 addis r6,r2,.LC__dl_hwcap@toc@ha
137 ld r6,.LC__dl_hwcap@toc@l(r6)
139 /* Load _rtld-global._dl_hwcap. */
140 ld r6,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r6)
142 /* Load extern _dl_hwcap. */
145 andis. r6,r6,(PPC_FEATURE_HAS_ALTIVEC >> 16)
147 la r5,((JB_VRS)*8)(3)
150 stw r0,((JB_VRSAVE)*8)(3) /* 32-bit VRSAVE. */
152 beq+ L(aligned_save_vmx)
158 # define save_misaligned_vmx(savevr,prevvr,shiftvr,tmpvr,savegpr,addgpr) \
159 addi addgpr,addgpr,32; \
160 vperm tmpvr,prevvr,savevr,shiftvr; \
164 * We have to be careful not to corrupt the data below v20 and
165 * above v31. To keep things simple we just rotate both ends in
166 * the opposite direction to our main permute so we can use
170 /* load and rotate data below v20 */
173 save_misaligned_vmx(v20,v2,v0,v3,r5,r6)
174 save_misaligned_vmx(v21,v20,v0,v3,r6,r5)
175 save_misaligned_vmx(v22,v21,v0,v3,r5,r6)
176 save_misaligned_vmx(v23,v22,v0,v3,r6,r5)
177 save_misaligned_vmx(v24,v23,v0,v3,r5,r6)
178 save_misaligned_vmx(v25,v24,v0,v3,r6,r5)
179 save_misaligned_vmx(v26,v25,v0,v3,r5,r6)
180 save_misaligned_vmx(v27,v26,v0,v3,r6,r5)
181 save_misaligned_vmx(v28,v27,v0,v3,r5,r6)
182 save_misaligned_vmx(v29,v28,v0,v3,r6,r5)
183 save_misaligned_vmx(v30,v29,v0,v3,r5,r6)
184 save_misaligned_vmx(v31,v30,v0,v3,r6,r5)
185 /* load and rotate data above v31 */
188 save_misaligned_vmx(v2,v31,v0,v3,r5,r6)
223 b JUMPTARGET (NOTOC (__sigjmp_save_symbol))
226 std r0,FRAME_LR_SAVE(r1)
227 stdu r1,-FRAME_MIN_SIZE(r1)
228 cfi_adjust_cfa_offset(FRAME_MIN_SIZE)
229 cfi_offset(lr,FRAME_LR_SAVE)
230 bl JUMPTARGET (__sigjmp_save_symbol)
232 ld r0,FRAME_MIN_SIZE+FRAME_LR_SAVE(r1)
233 addi r1,r1,FRAME_MIN_SIZE
237 END (__sigsetjmp_symbol)
239 #if defined SHARED && !IS_IN (rtld) && !defined __NO_VMX__
240 /* When called from within libc we need a special version of __sigsetjmp
241 that saves r2 since the call won't go via a plt call stub. See
243 ENTRY (__GI___sigsetjmp)
244 std r2,FRAME_TOC_SAVE(r1) /* Save the callers TOC in the save area. */
246 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
247 END (__GI___sigsetjmp)