1 /* setjmp for PowerPC64.
2 Copyright (C) 1995-2015 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 <http://www.gnu.org/licenses/>. */
20 #include <stap-probe.h>
23 #include <novmxsetjmp.h>
25 #include <jmpbuf-offsets.h>
33 /* Inside ld.so we use the local alias to avoid runtime GOT
35 .tc _rtld_local_ro[TC],_rtld_local_ro
37 .tc _rtld_global_ro[TC],_rtld_global_ro
40 .tc _dl_hwcap[TC],_dl_hwcap
48 li r4,1 /* Set second argument to 1. */
49 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
52 #if defined SHARED && !IS_IN (rtld) && !defined __NO_VMX__
53 /* When called from within libc we need a special version of _setjmp
54 that saves r2 since the call won't go via a plt call stub. See
55 bugz #269. __GI__setjmp is used in csu/libc-start.c when
56 HAVE_CLEANUP_JMP_BUF is defined. */
58 std r2,FRAME_TOC_SAVE(r1) /* Save the callers TOC in the save area. */
60 li r4,0 /* Set second argument to 0. */
61 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
65 ENTRY (_setjmp_symbol)
67 li r4,0 /* Set second argument to 0. */
68 b JUMPTARGET (GLUE(__sigsetjmp_symbol,_ent))
70 libc_hidden_def (_setjmp_symbol)
72 ENTRY (__sigsetjmp_symbol)
74 JUMPTARGET(GLUE(__sigsetjmp_symbol,_ent)):
83 #if defined SHARED && !IS_IN (rtld)
84 ld r5,FRAME_TOC_SAVE(r1) /* Retrieve the callers TOC. */
89 /* setjmp probe expects longjmp first argument (8@3), second argument
90 (-4@4), and target address (8@0), respectively. */
91 LIBC_PROBE (setjmp, 3, 8@3, -4@4, 8@0)
92 std r14,((JB_GPRS+0)*8)(3)
93 stfd fp14,((JB_FPRS+0)*8)(3)
98 std r15,((JB_GPRS+1)*8)(3)
99 stfd fp15,((JB_FPRS+1)*8)(3)
101 std r16,((JB_GPRS+2)*8)(3)
102 stfd fp16,((JB_FPRS+2)*8)(3)
103 stw r0,((JB_CR*8)+4)(3) /* 32-bit CR. */
104 std r17,((JB_GPRS+3)*8)(3)
105 stfd fp17,((JB_FPRS+3)*8)(3)
106 std r18,((JB_GPRS+4)*8)(3)
107 stfd fp18,((JB_FPRS+4)*8)(3)
108 std r19,((JB_GPRS+5)*8)(3)
109 stfd fp19,((JB_FPRS+5)*8)(3)
110 std r20,((JB_GPRS+6)*8)(3)
111 stfd fp20,((JB_FPRS+6)*8)(3)
112 std r21,((JB_GPRS+7)*8)(3)
113 stfd fp21,((JB_FPRS+7)*8)(3)
114 std r22,((JB_GPRS+8)*8)(3)
115 stfd fp22,((JB_FPRS+8)*8)(3)
116 std r23,((JB_GPRS+9)*8)(3)
117 stfd fp23,((JB_FPRS+9)*8)(3)
118 std r24,((JB_GPRS+10)*8)(3)
119 stfd fp24,((JB_FPRS+10)*8)(3)
120 std r25,((JB_GPRS+11)*8)(3)
121 stfd fp25,((JB_FPRS+11)*8)(3)
122 std r26,((JB_GPRS+12)*8)(3)
123 stfd fp26,((JB_FPRS+12)*8)(3)
124 std r27,((JB_GPRS+13)*8)(3)
125 stfd fp27,((JB_FPRS+13)*8)(3)
126 std r28,((JB_GPRS+14)*8)(3)
127 stfd fp28,((JB_FPRS+14)*8)(3)
128 std r29,((JB_GPRS+15)*8)(3)
129 stfd fp29,((JB_FPRS+15)*8)(3)
130 std r30,((JB_GPRS+16)*8)(3)
131 stfd fp30,((JB_FPRS+16)*8)(3)
132 std r31,((JB_GPRS+17)*8)(3)
133 stfd fp31,((JB_FPRS+17)*8)(3)
135 ld r6,.LC__dl_hwcap@toc(r2)
137 /* Load _rtld-global._dl_hwcap. */
138 ld r6,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r6)
140 ld r6,0(r6) /* Load extern _dl_hwcap. */
142 andis. r6,r6,(PPC_FEATURE_HAS_ALTIVEC >> 16)
144 la r5,((JB_VRS)*8)(3)
147 stw r0,((JB_VRSAVE)*8)(3) /* 32-bit VRSAVE. */
149 beq+ L(aligned_save_vmx)
155 # define save_misaligned_vmx(savevr,prevvr,shiftvr,tmpvr,savegpr,addgpr) \
156 addi addgpr,addgpr,32; \
157 vperm tmpvr,prevvr,savevr,shiftvr; \
161 * We have to be careful not to corrupt the data below v20 and
162 * above v31. To keep things simple we just rotate both ends in
163 * the opposite direction to our main permute so we can use
167 /* load and rotate data below v20 */
170 save_misaligned_vmx(v20,v2,v0,v3,r5,r6)
171 save_misaligned_vmx(v21,v20,v0,v3,r6,r5)
172 save_misaligned_vmx(v22,v21,v0,v3,r5,r6)
173 save_misaligned_vmx(v23,v22,v0,v3,r6,r5)
174 save_misaligned_vmx(v24,v23,v0,v3,r5,r6)
175 save_misaligned_vmx(v25,v24,v0,v3,r6,r5)
176 save_misaligned_vmx(v26,v25,v0,v3,r5,r6)
177 save_misaligned_vmx(v27,v26,v0,v3,r6,r5)
178 save_misaligned_vmx(v28,v27,v0,v3,r5,r6)
179 save_misaligned_vmx(v29,v28,v0,v3,r6,r5)
180 save_misaligned_vmx(v30,v29,v0,v3,r5,r6)
181 save_misaligned_vmx(v31,v30,v0,v3,r6,r5)
182 /* load and rotate data above v31 */
185 save_misaligned_vmx(v2,v31,v0,v3,r5,r6)
220 b JUMPTARGET (__sigjmp_save_symbol)
223 std r0,FRAME_LR_SAVE(r1)
224 stdu r1,-FRAME_MIN_SIZE(r1)
225 cfi_adjust_cfa_offset(FRAME_MIN_SIZE)
226 cfi_offset(lr,FRAME_LR_SAVE)
227 bl JUMPTARGET (__sigjmp_save_symbol)
229 ld r0,FRAME_MIN_SIZE+FRAME_LR_SAVE(r1)
230 addi r1,r1,FRAME_MIN_SIZE
234 END (__sigsetjmp_symbol)