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609b4783 | 1 | /* Save current context and install the given one. |
688903eb | 2 | Copyright (C) 2002-2018 Free Software Foundation, Inc. |
609b4783 UD |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
609b4783 UD |
18 | |
19 | #include <sysdep.h> | |
5ef6ae4b UD |
20 | #include <rtld-global-offsets.h> |
21 | #include <shlib-compat.h> | |
609b4783 UD |
22 | |
23 | #define __ASSEMBLY__ | |
24 | #include <asm/ptrace.h> | |
25 | #include "ucontext_i.h" | |
38e68573 | 26 | #include <asm/errno.h> |
609b4783 | 27 | |
edba7a54 UD |
28 | .section ".toc","aw" |
29 | .LC__dl_hwcap: | |
30 | #ifdef SHARED | |
31 | .tc _rtld_global_ro[TC],_rtld_global_ro | |
32 | #else | |
33 | .tc _dl_hwcap[TC],_dl_hwcap | |
34 | #endif | |
35 | ||
5ef6ae4b | 36 | #if SHLIB_COMPAT (libc, GLIBC_2_3, GLIBC_2_3_4) |
edba7a54 | 37 | .section ".text" |
5ef6ae4b | 38 | ENTRY(__novec_swapcontext) |
865d953f | 39 | CALL_MCOUNT 2 |
5ef6ae4b UD |
40 | std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3) |
41 | std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3) | |
42 | mflr r0 | |
43 | std r31,-8(1) | |
3e7e947f | 44 | cfi_offset(r31,-8) |
5ef6ae4b UD |
45 | std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3) |
46 | std r0,FRAME_LR_SAVE(r1) | |
a7e91561 | 47 | cfi_offset (lr, FRAME_LR_SAVE) |
5ef6ae4b UD |
48 | std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3) |
49 | std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3) | |
50 | stdu r1,-128(r1) | |
a7e91561 | 51 | cfi_adjust_cfa_offset (128) |
5ef6ae4b UD |
52 | std r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3) |
53 | std r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3) | |
54 | std r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3) | |
55 | std r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3) | |
56 | std r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3) | |
57 | std r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3) | |
58 | std r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3) | |
59 | std r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3) | |
60 | std r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3) | |
61 | std r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3) | |
62 | std r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3) | |
63 | std r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3) | |
64 | std r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3) | |
65 | std r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3) | |
66 | std r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3) | |
67 | std r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3) | |
68 | std r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3) | |
69 | std r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3) | |
70 | std r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3) | |
71 | std r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3) | |
72 | std r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3) | |
73 | std r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3) | |
74 | std r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3) | |
75 | std r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3) | |
76 | std r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3) | |
77 | std r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3) | |
78 | std r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3) | |
79 | std r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3) | |
80 | mfctr r0 | |
81 | std r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3) | |
82 | mfxer r0 | |
83 | std r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3) | |
84 | mfcr r0 | |
85 | std r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3) | |
afdca0f2 UD |
86 | |
87 | /* Set the return value of swapcontext to "success". R3 is the only | |
5ef6ae4b UD |
88 | register whose value is not preserved in the saved context. */ |
89 | li r0,0 | |
90 | std r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3) | |
afdca0f2 | 91 | |
5ef6ae4b UD |
92 | /* Zero fill fields that can't be set in user state or are unused. */ |
93 | std r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3) | |
94 | std r0,(SIGCONTEXT_GP_REGS+(34*8))(r3) | |
95 | std r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3) | |
96 | std r0,(SIGCONTEXT_GP_REGS+(40*8))(r3) | |
97 | std r0,(SIGCONTEXT_GP_REGS+(41*8))(r3) | |
98 | std r0,(SIGCONTEXT_GP_REGS+(42*8))(r3) | |
99 | std r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3) | |
afdca0f2 UD |
100 | |
101 | /* Set the PT_REGS pointer to the address of sigcontext gp_regs | |
102 | field. Struct pt_regs and elf_gregset_t are the same thing. | |
5ef6ae4b UD |
103 | We kept the regs field for backwards compatibility with |
104 | libraries built before we extended sigcontext. */ | |
105 | addi r0,r3,SIGCONTEXT_GP_REGS | |
106 | std r0,SIGCONTEXT_PT_REGS(r3) | |
afdca0f2 | 107 | |
5ef6ae4b UD |
108 | stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3) |
109 | stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3) | |
110 | stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3) | |
111 | stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3) | |
112 | stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3) | |
113 | stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3) | |
114 | stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3) | |
115 | stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3) | |
116 | stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3) | |
117 | stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3) | |
118 | stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3) | |
119 | stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3) | |
120 | stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3) | |
121 | stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3) | |
122 | stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3) | |
123 | stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3) | |
124 | stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3) | |
125 | stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3) | |
126 | stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3) | |
127 | stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3) | |
128 | stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3) | |
129 | stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3) | |
130 | stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3) | |
131 | stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3) | |
132 | stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3) | |
133 | stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3) | |
134 | stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3) | |
135 | stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3) | |
136 | stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3) | |
b86d92c0 | 137 | stfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r3) |
5ef6ae4b UD |
138 | mffs fp0 |
139 | stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3) | |
140 | stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3) | |
141 | stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3) | |
142 | ||
143 | mr r31,r4 | |
144 | addi r5,r3,UCONTEXT_SIGMASK | |
145 | addi r4,r4,UCONTEXT_SIGMASK | |
146 | li r3,SIG_SETMASK | |
d980f41a | 147 | bl JUMPTARGET(__sigprocmask) |
5ef6ae4b UD |
148 | nop |
149 | cmpdi r3,0 | |
150 | bne L(nv_error_exit) | |
151 | ||
152 | /* | |
153 | * If this new ucontext refers to the point where we were interrupted | |
154 | * by a signal, we have to use the rt_sigreturn system call to | |
155 | * return to the context so we get both LR and CTR restored. | |
156 | * | |
157 | * Otherwise, the context we are restoring is either just after | |
158 | * a procedure call (getcontext/swapcontext) or at the beginning | |
159 | * of a procedure call (makecontext), so we don't need to restore | |
160 | * msr and ctr. We don't restore r13 since it will be used as | |
161 | * the TLS pointer. */ | |
16cc1800 | 162 | ld r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31) |
5ef6ae4b UD |
163 | cmpdi r0,0 |
164 | bne L(nv_do_sigret) | |
165 | ||
cbc06bc4 | 166 | ld r8,.LC__dl_hwcap@toc(r2) |
edba7a54 UD |
167 | # ifdef SHARED |
168 | /* Load _rtld-global._dl_hwcap. */ | |
169 | ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8) | |
170 | # else | |
171 | ld r8,0(r8) /* Load extern _dl_hwcap. */ | |
172 | # endif | |
173 | ||
5ef6ae4b | 174 | lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31) |
afdca0f2 | 175 | lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31) |
5ef6ae4b | 176 | lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31) |
db8fed87 | 177 | |
edba7a54 UD |
178 | # ifdef _ARCH_PWR6 |
179 | /* Use the extended four-operand version of the mtfsf insn. */ | |
bddec78c UD |
180 | .machine push |
181 | .machine "power6" | |
db8fed87 MS |
182 | |
183 | mtfsf 0xff,fp0,1,0 | |
184 | ||
185 | .machine pop | |
186 | # else | |
edba7a54 UD |
187 | /* Availability of DFP indicates a 64-bit FPSCR. */ |
188 | andi. r6,r8,PPC_FEATURE_HAS_DFP | |
189 | beq 5f | |
db8fed87 MS |
190 | |
191 | .machine push | |
192 | .machine "power6" | |
193 | ||
edba7a54 | 194 | mtfsf 0xff,fp0,1,0 |
db8fed87 MS |
195 | |
196 | .machine pop | |
197 | ||
edba7a54 UD |
198 | b 6f |
199 | /* Continue to operate on the FPSCR as if it were 32-bits. */ | |
200 | 5: | |
5ef6ae4b | 201 | mtfsf 0xff,fp0 |
edba7a54 UD |
202 | 6: |
203 | #endif /* _ARCH_PWR6 */ | |
db8fed87 | 204 | |
afdca0f2 | 205 | lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31) |
5ef6ae4b | 206 | lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31) |
afdca0f2 | 207 | lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31) |
5ef6ae4b | 208 | lfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31) |
afdca0f2 | 209 | lfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31) |
5ef6ae4b | 210 | lfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31) |
afdca0f2 | 211 | lfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31) |
5ef6ae4b | 212 | lfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31) |
afdca0f2 | 213 | lfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31) |
5ef6ae4b | 214 | lfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31) |
afdca0f2 | 215 | lfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31) |
5ef6ae4b | 216 | lfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31) |
afdca0f2 | 217 | lfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31) |
5ef6ae4b | 218 | lfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31) |
afdca0f2 | 219 | lfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31) |
5ef6ae4b | 220 | lfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31) |
afdca0f2 | 221 | lfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31) |
5ef6ae4b | 222 | lfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31) |
afdca0f2 | 223 | lfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31) |
5ef6ae4b | 224 | lfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31) |
afdca0f2 | 225 | lfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31) |
5ef6ae4b | 226 | lfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31) |
afdca0f2 | 227 | lfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31) |
5ef6ae4b | 228 | lfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31) |
afdca0f2 | 229 | lfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31) |
5ef6ae4b | 230 | lfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31) |
afdca0f2 | 231 | lfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31) |
5ef6ae4b | 232 | lfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31) |
afdca0f2 | 233 | lfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31) |
5ef6ae4b | 234 | lfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31) |
afdca0f2 UD |
235 | |
236 | ld r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31) | |
5ef6ae4b UD |
237 | ld r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31) |
238 | mtlr r0 | |
239 | ld r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31) | |
240 | ld r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31) | |
241 | ld r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31) | |
242 | mtxer r0 | |
243 | ld r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31) | |
244 | ld r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31) | |
245 | ld r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31) | |
16cc1800 | 246 | mtcr r0 |
5ef6ae4b UD |
247 | ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31) |
248 | ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31) | |
249 | ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31) | |
250 | ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31) | |
251 | ld r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31) | |
252 | ld r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31) | |
253 | ld r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31) | |
254 | /* Don't reload the thread ID or TLS pointer (r13). */ | |
255 | ld r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31) | |
256 | ld r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31) | |
257 | ld r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31) | |
258 | ld r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31) | |
259 | ld r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31) | |
260 | ld r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31) | |
261 | ld r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31) | |
262 | ld r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31) | |
263 | ld r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31) | |
264 | ld r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31) | |
265 | ld r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31) | |
266 | ld r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31) | |
267 | ld r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31) | |
268 | ld r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31) | |
269 | ld r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31) | |
270 | ld r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31) | |
271 | ld r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31) | |
afdca0f2 | 272 | |
5ef6ae4b | 273 | /* Now we branch to the "Next Instruction Pointer" from the saved |
afdca0f2 | 274 | context. With the powerpc64 instruction set there is no good way to |
5ef6ae4b | 275 | do this (from user state) without clobbering either the LR or CTR. |
afdca0f2 | 276 | The makecontext and swapcontext functions depend on the callers |
5ef6ae4b UD |
277 | LR being preserved so we use the CTR. */ |
278 | ld r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31) | |
279 | mtctr r0 | |
280 | ld r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31) | |
281 | ld r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31) | |
282 | bctr | |
afdca0f2 | 283 | |
5ef6ae4b | 284 | L(nv_error_exit): |
afdca0f2 | 285 | ld r0,128+FRAME_LR_SAVE(r1) |
5ef6ae4b UD |
286 | addi r1,r1,128 |
287 | mtlr r0 | |
288 | ld r31,-8(r1) | |
289 | blr | |
290 | ||
afdca0f2 UD |
291 | /* At this point we assume that the ucontext was created by a |
292 | rt_signal and we should use rt_sigreturn to restore the original | |
293 | state. As of the 2.4.21 kernel the ucontext is the first thing | |
294 | (offset 0) in the rt_signal frame and rt_sigreturn expects the | |
295 | ucontext address in R1. Normally the rt-signal trampoline handles | |
296 | this by popping dummy frame before the rt_signal syscall. In our | |
297 | case the stack may not be in its original (signal handler return with | |
298 | R1 pointing at the dummy frame) state. We do have the ucontext | |
5ef6ae4b UD |
299 | address in R3, so simply copy R3 to R1 before the syscall. */ |
300 | L(nv_do_sigret): | |
301 | mr r1,r3, | |
302 | li r0,SYS_ify(rt_sigreturn) | |
303 | sc | |
304 | /* No return. */ | |
5ef6ae4b UD |
305 | |
306 | PSEUDO_END(__novec_swapcontext) | |
307 | ||
308 | compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3) | |
309 | ||
310 | #endif | |
311 | ||
5ef6ae4b | 312 | .section ".text" |
f2bfeadf | 313 | .machine "altivec" |
609b4783 | 314 | ENTRY(__swapcontext) |
865d953f | 315 | CALL_MCOUNT 2 |
609b4783 UD |
316 | std r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r3) |
317 | std r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r3) | |
318 | mflr r0 | |
319 | std r31,-8(1) | |
3e7e947f | 320 | cfi_offset(r31,-8) |
609b4783 UD |
321 | std r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r3) |
322 | std r0,FRAME_LR_SAVE(r1) | |
3e7e947f | 323 | cfi_offset (lr, FRAME_LR_SAVE) |
609b4783 UD |
324 | std r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r3) |
325 | std r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r3) | |
326 | stdu r1,-128(r1) | |
3e7e947f | 327 | cfi_adjust_cfa_offset(128) |
609b4783 UD |
328 | std r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r3) |
329 | std r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r3) | |
330 | std r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r3) | |
331 | std r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r3) | |
332 | std r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r3) | |
333 | std r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r3) | |
334 | std r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r3) | |
335 | std r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r3) | |
336 | std r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r3) | |
337 | std r13,(SIGCONTEXT_GP_REGS+(PT_R13*8))(r3) | |
338 | std r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r3) | |
339 | std r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r3) | |
340 | std r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r3) | |
341 | std r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r3) | |
342 | std r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r3) | |
343 | std r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r3) | |
344 | std r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r3) | |
345 | std r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r3) | |
346 | std r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r3) | |
347 | std r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r3) | |
348 | std r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r3) | |
349 | std r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r3) | |
350 | std r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r3) | |
351 | std r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r3) | |
352 | std r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r3) | |
353 | std r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r3) | |
354 | std r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r3) | |
355 | std r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r3) | |
356 | mfctr r0 | |
357 | std r0,(SIGCONTEXT_GP_REGS+(PT_CTR*8))(r3) | |
358 | mfxer r0 | |
359 | std r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r3) | |
360 | mfcr r0 | |
361 | std r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r3) | |
afdca0f2 UD |
362 | |
363 | /* Set the return value of swapcontext to "success". R3 is the only | |
609b4783 UD |
364 | register whose value is not preserved in the saved context. */ |
365 | li r0,0 | |
366 | std r0,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r3) | |
afdca0f2 | 367 | |
609b4783 UD |
368 | /* Zero fill fields that can't be set in user state or are unused. */ |
369 | std r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r3) | |
370 | std r0,(SIGCONTEXT_GP_REGS+(34*8))(r3) | |
371 | std r0,(SIGCONTEXT_GP_REGS+(PT_SOFTE*8))(r3) | |
372 | std r0,(SIGCONTEXT_GP_REGS+(40*8))(r3) | |
373 | std r0,(SIGCONTEXT_GP_REGS+(41*8))(r3) | |
374 | std r0,(SIGCONTEXT_GP_REGS+(42*8))(r3) | |
375 | std r0,(SIGCONTEXT_GP_REGS+(PT_RESULT*8))(r3) | |
afdca0f2 UD |
376 | |
377 | /* Set the PT_REGS pointer to the address of sigcontext gp_regs | |
378 | field. Struct pt_regs and elf_gregset_t are the same thing. | |
609b4783 UD |
379 | We kept the regs field for backwards compatibility with |
380 | libraries built before we extended sigcontext. */ | |
381 | addi r0,r3,SIGCONTEXT_GP_REGS | |
382 | std r0,SIGCONTEXT_PT_REGS(r3) | |
afdca0f2 | 383 | |
609b4783 UD |
384 | stfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r3) |
385 | stfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r3) | |
386 | stfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r3) | |
387 | stfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r3) | |
388 | stfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r3) | |
389 | stfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r3) | |
390 | stfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r3) | |
391 | stfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r3) | |
392 | stfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r3) | |
393 | stfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r3) | |
394 | stfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r3) | |
395 | stfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r3) | |
396 | stfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r3) | |
397 | stfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r3) | |
398 | stfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r3) | |
399 | stfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r3) | |
400 | stfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r3) | |
401 | stfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r3) | |
402 | stfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r3) | |
403 | stfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r3) | |
404 | stfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r3) | |
405 | stfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r3) | |
406 | stfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r3) | |
407 | stfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r3) | |
408 | stfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r3) | |
409 | stfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r3) | |
410 | stfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r3) | |
411 | stfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r3) | |
412 | stfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r3) | |
b86d92c0 | 413 | stfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r3) |
609b4783 UD |
414 | mffs fp0 |
415 | stfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r3) | |
416 | stfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r3) | |
417 | stfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r3) | |
afdca0f2 | 418 | |
5ef6ae4b | 419 | ld r8,.LC__dl_hwcap@toc(r2) |
afdca0f2 | 420 | #ifdef SHARED |
5ef6ae4b | 421 | /* Load _rtld-global._dl_hwcap. */ |
ef690add | 422 | ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8) |
afdca0f2 | 423 | #else |
5ef6ae4b UD |
424 | ld r8,0(r8) /* Load extern _dl_hwcap. */ |
425 | #endif | |
5ef6ae4b UD |
426 | la r10,(SIGCONTEXT_V_RESERVE+8)(r3) |
427 | la r9,(SIGCONTEXT_V_RESERVE+24)(r3) | |
fb9d5c73 | 428 | |
edba7a54 | 429 | andis. r6,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) |
e1ad4c53 | 430 | |
5ef6ae4b | 431 | clrrdi r10,r10,4 |
e1ad4c53 | 432 | beq L(has_no_vec) |
fb9d5c73 | 433 | |
5ef6ae4b | 434 | clrrdi r9,r9,4 |
e1ad4c53 | 435 | mr r8,r10 /* Capture *v_regs value in r5. */ |
afdca0f2 UD |
436 | |
437 | stvx v0,0,r10 | |
5ef6ae4b UD |
438 | stvx v1,0,r9 |
439 | addi r10,r10,32 | |
440 | addi r9,r9,32 | |
afdca0f2 UD |
441 | |
442 | stvx v2,0,r10 | |
5ef6ae4b UD |
443 | stvx v3,0,r9 |
444 | addi r10,r10,32 | |
445 | addi r9,r9,32 | |
afdca0f2 UD |
446 | |
447 | stvx v4,0,r10 | |
5ef6ae4b UD |
448 | stvx v5,0,r9 |
449 | addi r10,r10,32 | |
450 | addi r9,r9,32 | |
afdca0f2 UD |
451 | |
452 | stvx v6,0,r10 | |
5ef6ae4b UD |
453 | stvx v7,0,r9 |
454 | addi r10,r10,32 | |
455 | addi r9,r9,32 | |
afdca0f2 UD |
456 | |
457 | stvx v8,0,r10 | |
5ef6ae4b UD |
458 | stvx v9,0,r9 |
459 | addi r10,r10,32 | |
460 | addi r9,r9,32 | |
afdca0f2 UD |
461 | |
462 | stvx v10,0,r10 | |
5ef6ae4b UD |
463 | stvx v11,0,r9 |
464 | addi r10,r10,32 | |
465 | addi r9,r9,32 | |
afdca0f2 UD |
466 | |
467 | stvx v12,0,r10 | |
5ef6ae4b UD |
468 | stvx v13,0,r9 |
469 | addi r10,r10,32 | |
470 | addi r9,r9,32 | |
afdca0f2 UD |
471 | |
472 | stvx v14,0,r10 | |
5ef6ae4b UD |
473 | stvx v15,0,r9 |
474 | addi r10,r10,32 | |
475 | addi r9,r9,32 | |
afdca0f2 UD |
476 | |
477 | stvx v16,0,r10 | |
5ef6ae4b UD |
478 | stvx v17,0,r9 |
479 | addi r10,r10,32 | |
480 | addi r9,r9,32 | |
afdca0f2 UD |
481 | |
482 | stvx v18,0,r10 | |
e1ad4c53 RM |
483 | stvx v19,0,r9 |
484 | addi r10,r10,32 | |
5ef6ae4b | 485 | addi r9,r9,32 |
afdca0f2 UD |
486 | |
487 | stvx v20,0,r10 | |
5ef6ae4b UD |
488 | stvx v21,0,r9 |
489 | addi r10,r10,32 | |
490 | addi r9,r9,32 | |
afdca0f2 UD |
491 | |
492 | stvx v22,0,r10 | |
5ef6ae4b UD |
493 | stvx v23,0,r9 |
494 | addi r10,r10,32 | |
495 | addi r9,r9,32 | |
afdca0f2 UD |
496 | |
497 | stvx v24,0,r10 | |
5ef6ae4b UD |
498 | stvx v25,0,r9 |
499 | addi r10,r10,32 | |
500 | addi r9,r9,32 | |
afdca0f2 UD |
501 | |
502 | stvx v26,0,r10 | |
5ef6ae4b UD |
503 | stvx v27,0,r9 |
504 | addi r10,r10,32 | |
505 | addi r9,r9,32 | |
afdca0f2 UD |
506 | |
507 | stvx v28,0,r10 | |
5ef6ae4b UD |
508 | stvx v29,0,r9 |
509 | addi r10,r10,32 | |
510 | addi r9,r9,32 | |
afdca0f2 UD |
511 | |
512 | stvx v30,0,r10 | |
5ef6ae4b UD |
513 | stvx v31,0,r9 |
514 | addi r10,r10,32 | |
515 | addi r9,r9,32 | |
afdca0f2 | 516 | |
5ef6ae4b UD |
517 | mfvscr v0 |
518 | mfspr r0,VRSAVE | |
519 | stvx v0,0,r10 | |
fb9d5c73 | 520 | stw r0,0(r9) |
afdca0f2 | 521 | |
5ef6ae4b | 522 | L(has_no_vec): |
afdca0f2 | 523 | /* |
5ef6ae4b UD |
524 | Store either a NULL or a quadword aligned pointer to the Vector register |
525 | array into *v_regs. | |
526 | */ | |
e1ad4c53 | 527 | std r8,(SIGCONTEXT_V_REGS_PTR)(r3) |
609b4783 UD |
528 | |
529 | mr r31,r4 | |
530 | addi r5,r3,UCONTEXT_SIGMASK | |
531 | addi r4,r4,UCONTEXT_SIGMASK | |
532 | li r3,SIG_SETMASK | |
d980f41a | 533 | bl JUMPTARGET(__sigprocmask) |
609b4783 UD |
534 | nop |
535 | cmpdi r3,0 | |
536 | bne L(error_exit) | |
537 | ||
538 | /* | |
539 | * If this new ucontext refers to the point where we were interrupted | |
540 | * by a signal, we have to use the rt_sigreturn system call to | |
541 | * return to the context so we get both LR and CTR restored. | |
542 | * | |
543 | * Otherwise, the context we are restoring is either just after | |
544 | * a procedure call (getcontext/swapcontext) or at the beginning | |
545 | * of a procedure call (makecontext), so we don't need to restore | |
546 | * msr and ctr. We don't restore r13 since it will be used as | |
547 | * the TLS pointer. */ | |
16cc1800 | 548 | ld r0,(SIGCONTEXT_GP_REGS+(PT_MSR*8))(r31) |
609b4783 UD |
549 | cmpdi r0,0 |
550 | bne L(do_sigret) | |
afdca0f2 | 551 | |
5ef6ae4b UD |
552 | ld r8,.LC__dl_hwcap@toc(r2) |
553 | ld r10,(SIGCONTEXT_V_REGS_PTR)(r31) | |
ef690add | 554 | # ifdef SHARED |
5ef6ae4b | 555 | /* Load _rtld-global._dl_hwcap. */ |
ef690add UD |
556 | ld r8,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r8) |
557 | # else | |
5ef6ae4b | 558 | ld r8,0(r8) /* Load extern _dl_hwcap. */ |
ef690add | 559 | # endif |
edba7a54 | 560 | andis. r6,r8,(PPC_FEATURE_HAS_ALTIVEC >> 16) |
5ef6ae4b | 561 | beq L(has_no_vec2) |
afdca0f2 | 562 | |
5ef6ae4b UD |
563 | cmpdi r10,0 |
564 | beq L(has_no_vec2) | |
565 | lwz r0,(33*16)(r10) | |
afdca0f2 | 566 | |
5ef6ae4b UD |
567 | li r9,(16*32) |
568 | mtspr VRSAVE,r0 | |
569 | cmpwi r0,0 | |
afdca0f2 UD |
570 | beq L(has_no_vec2) |
571 | ||
5ef6ae4b UD |
572 | lvx v19,r9,r10 |
573 | la r9,(16)(r10) | |
afdca0f2 UD |
574 | |
575 | lvx v0,0,r10 | |
5ef6ae4b UD |
576 | lvx v1,0,r9 |
577 | addi r10,r10,32 | |
578 | addi r9,r9,32 | |
afdca0f2 | 579 | |
5ef6ae4b | 580 | mtvscr v19 |
afdca0f2 | 581 | lvx v2,0,r10 |
5ef6ae4b UD |
582 | lvx v3,0,r9 |
583 | addi r10,r10,32 | |
584 | addi r9,r9,32 | |
afdca0f2 UD |
585 | |
586 | lvx v4,0,r10 | |
5ef6ae4b UD |
587 | lvx v5,0,r9 |
588 | addi r10,r10,32 | |
589 | addi r9,r9,32 | |
afdca0f2 UD |
590 | |
591 | lvx v6,0,r10 | |
5ef6ae4b UD |
592 | lvx v7,0,r9 |
593 | addi r10,r10,32 | |
594 | addi r9,r9,32 | |
afdca0f2 UD |
595 | |
596 | lvx v8,0,r10 | |
5ef6ae4b UD |
597 | lvx v9,0,r9 |
598 | addi r10,r10,32 | |
599 | addi r9,r9,32 | |
afdca0f2 UD |
600 | |
601 | lvx v10,0,r10 | |
5ef6ae4b UD |
602 | lvx v11,0,r9 |
603 | addi r10,r10,32 | |
604 | addi r9,r9,32 | |
afdca0f2 UD |
605 | |
606 | lvx v12,0,r10 | |
5ef6ae4b UD |
607 | lvx v13,0,r9 |
608 | addi r10,r10,32 | |
609 | addi r9,r9,32 | |
afdca0f2 UD |
610 | |
611 | lvx v14,0,r10 | |
5ef6ae4b UD |
612 | lvx v15,0,r9 |
613 | addi r10,r10,32 | |
614 | addi r9,r9,32 | |
afdca0f2 UD |
615 | |
616 | lvx v16,0,r10 | |
5ef6ae4b UD |
617 | lvx v17,0,r9 |
618 | addi r10,r10,32 | |
619 | addi r9,r9,32 | |
afdca0f2 UD |
620 | |
621 | lvx v18,0,r10 | |
e1ad4c53 RM |
622 | lvx v19,0,r9 |
623 | addi r10,r10,32 | |
5ef6ae4b | 624 | addi r9,r9,32 |
afdca0f2 UD |
625 | |
626 | lvx v20,0,r10 | |
5ef6ae4b UD |
627 | lvx v21,0,r9 |
628 | addi r10,r10,32 | |
629 | addi r9,r9,32 | |
afdca0f2 UD |
630 | |
631 | lvx v22,0,r10 | |
5ef6ae4b UD |
632 | lvx v23,0,r9 |
633 | addi r10,r10,32 | |
634 | addi r9,r9,32 | |
afdca0f2 UD |
635 | |
636 | lvx v24,0,r10 | |
5ef6ae4b UD |
637 | lvx v25,0,r9 |
638 | addi r10,r10,32 | |
639 | addi r9,r9,32 | |
afdca0f2 UD |
640 | |
641 | lvx v26,0,r10 | |
5ef6ae4b UD |
642 | lvx v27,0,r9 |
643 | addi r10,r10,32 | |
644 | addi r9,r9,32 | |
afdca0f2 UD |
645 | |
646 | lvx v28,0,r10 | |
5ef6ae4b UD |
647 | lvx v29,0,r9 |
648 | addi r10,r10,32 | |
649 | addi r9,r9,32 | |
afdca0f2 UD |
650 | |
651 | lvx v30,0,r10 | |
5ef6ae4b UD |
652 | lvx v31,0,r9 |
653 | addi r10,r10,32 | |
654 | addi r9,r9,32 | |
afdca0f2 UD |
655 | |
656 | lvx v10,0,r10 | |
5ef6ae4b UD |
657 | lvx v11,0,r9 |
658 | addi r10,r10,32 | |
659 | addi r9,r9,32 | |
afdca0f2 | 660 | |
5ef6ae4b | 661 | L(has_no_vec2): |
609b4783 UD |
662 | |
663 | lfd fp0,(SIGCONTEXT_FP_REGS+(32*8))(r31) | |
afdca0f2 | 664 | lfd fp31,(SIGCONTEXT_FP_REGS+(PT_R31*8))(r31) |
609b4783 | 665 | lfd fp30,(SIGCONTEXT_FP_REGS+(PT_R30*8))(r31) |
db8fed87 | 666 | |
edba7a54 UD |
667 | # ifdef _ARCH_PWR6 |
668 | /* Use the extended four-operand version of the mtfsf insn. */ | |
bddec78c UD |
669 | .machine push |
670 | .machine "power6" | |
db8fed87 MS |
671 | |
672 | mtfsf 0xff,fp0,1,0 | |
673 | ||
674 | .machine pop | |
675 | # else | |
edba7a54 UD |
676 | /* Availability of DFP indicates a 64-bit FPSCR. */ |
677 | andi. r6,r8,PPC_FEATURE_HAS_DFP | |
678 | beq 7f | |
db8fed87 MS |
679 | |
680 | .machine push | |
681 | .machine "power6" | |
682 | ||
edba7a54 | 683 | mtfsf 0xff,fp0,1,0 |
db8fed87 MS |
684 | |
685 | .machine pop | |
686 | ||
edba7a54 UD |
687 | b 8f |
688 | /* Continue to operate on the FPSCR as if it were 32-bits. */ | |
689 | 7: | |
609b4783 | 690 | mtfsf 0xff,fp0 |
edba7a54 UD |
691 | 8: |
692 | #endif /* _ARCH_PWR6 */ | |
db8fed87 | 693 | |
afdca0f2 | 694 | lfd fp29,(SIGCONTEXT_FP_REGS+(PT_R29*8))(r31) |
609b4783 | 695 | lfd fp28,(SIGCONTEXT_FP_REGS+(PT_R28*8))(r31) |
afdca0f2 | 696 | lfd fp27,(SIGCONTEXT_FP_REGS+(PT_R27*8))(r31) |
609b4783 | 697 | lfd fp26,(SIGCONTEXT_FP_REGS+(PT_R26*8))(r31) |
afdca0f2 | 698 | lfd fp25,(SIGCONTEXT_FP_REGS+(PT_R25*8))(r31) |
609b4783 | 699 | lfd fp24,(SIGCONTEXT_FP_REGS+(PT_R24*8))(r31) |
afdca0f2 | 700 | lfd fp23,(SIGCONTEXT_FP_REGS+(PT_R23*8))(r31) |
609b4783 | 701 | lfd fp22,(SIGCONTEXT_FP_REGS+(PT_R22*8))(r31) |
afdca0f2 | 702 | lfd fp21,(SIGCONTEXT_FP_REGS+(PT_R21*8))(r31) |
609b4783 | 703 | lfd fp20,(SIGCONTEXT_FP_REGS+(PT_R20*8))(r31) |
afdca0f2 | 704 | lfd fp19,(SIGCONTEXT_FP_REGS+(PT_R19*8))(r31) |
609b4783 | 705 | lfd fp18,(SIGCONTEXT_FP_REGS+(PT_R18*8))(r31) |
afdca0f2 | 706 | lfd fp17,(SIGCONTEXT_FP_REGS+(PT_R17*8))(r31) |
609b4783 | 707 | lfd fp16,(SIGCONTEXT_FP_REGS+(PT_R16*8))(r31) |
afdca0f2 | 708 | lfd fp15,(SIGCONTEXT_FP_REGS+(PT_R15*8))(r31) |
609b4783 | 709 | lfd fp14,(SIGCONTEXT_FP_REGS+(PT_R14*8))(r31) |
afdca0f2 | 710 | lfd fp13,(SIGCONTEXT_FP_REGS+(PT_R13*8))(r31) |
609b4783 | 711 | lfd fp12,(SIGCONTEXT_FP_REGS+(PT_R12*8))(r31) |
afdca0f2 | 712 | lfd fp11,(SIGCONTEXT_FP_REGS+(PT_R11*8))(r31) |
609b4783 | 713 | lfd fp10,(SIGCONTEXT_FP_REGS+(PT_R10*8))(r31) |
afdca0f2 | 714 | lfd fp9,(SIGCONTEXT_FP_REGS+(PT_R9*8))(r31) |
609b4783 | 715 | lfd fp8,(SIGCONTEXT_FP_REGS+(PT_R8*8))(r31) |
afdca0f2 | 716 | lfd fp7,(SIGCONTEXT_FP_REGS+(PT_R7*8))(r31) |
609b4783 | 717 | lfd fp6,(SIGCONTEXT_FP_REGS+(PT_R6*8))(r31) |
afdca0f2 | 718 | lfd fp5,(SIGCONTEXT_FP_REGS+(PT_R5*8))(r31) |
609b4783 | 719 | lfd fp4,(SIGCONTEXT_FP_REGS+(PT_R4*8))(r31) |
afdca0f2 | 720 | lfd fp3,(SIGCONTEXT_FP_REGS+(PT_R3*8))(r31) |
609b4783 | 721 | lfd fp2,(SIGCONTEXT_FP_REGS+(PT_R2*8))(r31) |
afdca0f2 | 722 | lfd fp1,(SIGCONTEXT_FP_REGS+(PT_R1*8))(r31) |
609b4783 | 723 | lfd fp0,(SIGCONTEXT_FP_REGS+(PT_R0*8))(r31) |
afdca0f2 UD |
724 | |
725 | ld r0,(SIGCONTEXT_GP_REGS+(PT_LNK*8))(r31) | |
609b4783 UD |
726 | ld r1,(SIGCONTEXT_GP_REGS+(PT_R1*8))(r31) |
727 | mtlr r0 | |
728 | ld r2,(SIGCONTEXT_GP_REGS+(PT_R2*8))(r31) | |
729 | ld r0,(SIGCONTEXT_GP_REGS+(PT_XER*8))(r31) | |
730 | ld r3,(SIGCONTEXT_GP_REGS+(PT_R3*8))(r31) | |
731 | mtxer r0 | |
732 | ld r4,(SIGCONTEXT_GP_REGS+(PT_R4*8))(r31) | |
733 | ld r0,(SIGCONTEXT_GP_REGS+(PT_CCR*8))(r31) | |
734 | ld r5,(SIGCONTEXT_GP_REGS+(PT_R5*8))(r31) | |
609b4783 UD |
735 | ld r6,(SIGCONTEXT_GP_REGS+(PT_R6*8))(r31) |
736 | ld r7,(SIGCONTEXT_GP_REGS+(PT_R7*8))(r31) | |
737 | ld r8,(SIGCONTEXT_GP_REGS+(PT_R8*8))(r31) | |
738 | ld r9,(SIGCONTEXT_GP_REGS+(PT_R9*8))(r31) | |
16cc1800 | 739 | mtcr r0 |
609b4783 UD |
740 | ld r10,(SIGCONTEXT_GP_REGS+(PT_R10*8))(r31) |
741 | ld r11,(SIGCONTEXT_GP_REGS+(PT_R11*8))(r31) | |
742 | ld r12,(SIGCONTEXT_GP_REGS+(PT_R12*8))(r31) | |
743 | /* Don't reload the thread ID or TLS pointer (r13). */ | |
744 | ld r14,(SIGCONTEXT_GP_REGS+(PT_R14*8))(r31) | |
745 | ld r15,(SIGCONTEXT_GP_REGS+(PT_R15*8))(r31) | |
746 | ld r16,(SIGCONTEXT_GP_REGS+(PT_R16*8))(r31) | |
747 | ld r17,(SIGCONTEXT_GP_REGS+(PT_R17*8))(r31) | |
748 | ld r18,(SIGCONTEXT_GP_REGS+(PT_R18*8))(r31) | |
749 | ld r19,(SIGCONTEXT_GP_REGS+(PT_R19*8))(r31) | |
750 | ld r20,(SIGCONTEXT_GP_REGS+(PT_R20*8))(r31) | |
751 | ld r21,(SIGCONTEXT_GP_REGS+(PT_R21*8))(r31) | |
752 | ld r22,(SIGCONTEXT_GP_REGS+(PT_R22*8))(r31) | |
753 | ld r23,(SIGCONTEXT_GP_REGS+(PT_R23*8))(r31) | |
754 | ld r24,(SIGCONTEXT_GP_REGS+(PT_R24*8))(r31) | |
755 | ld r25,(SIGCONTEXT_GP_REGS+(PT_R25*8))(r31) | |
756 | ld r26,(SIGCONTEXT_GP_REGS+(PT_R26*8))(r31) | |
757 | ld r27,(SIGCONTEXT_GP_REGS+(PT_R27*8))(r31) | |
758 | ld r28,(SIGCONTEXT_GP_REGS+(PT_R28*8))(r31) | |
759 | ld r29,(SIGCONTEXT_GP_REGS+(PT_R29*8))(r31) | |
760 | ld r30,(SIGCONTEXT_GP_REGS+(PT_R30*8))(r31) | |
afdca0f2 | 761 | |
609b4783 | 762 | /* Now we branch to the "Next Instruction Pointer" from the saved |
afdca0f2 | 763 | context. With the powerpc64 instruction set there is no good way to |
609b4783 | 764 | do this (from user state) without clobbering either the LR or CTR. |
afdca0f2 | 765 | The makecontext and swapcontext functions depend on the callers |
609b4783 UD |
766 | LR being preserved so we use the CTR. */ |
767 | ld r0,(SIGCONTEXT_GP_REGS+(PT_NIP*8))(r31) | |
768 | mtctr r0 | |
769 | ld r0,(SIGCONTEXT_GP_REGS+(PT_R0*8))(r31) | |
770 | ld r31,(SIGCONTEXT_GP_REGS+(PT_R31*8))(r31) | |
771 | bctr | |
afdca0f2 | 772 | |
609b4783 | 773 | L(error_exit): |
afdca0f2 | 774 | ld r0,128+FRAME_LR_SAVE(r1) |
609b4783 UD |
775 | addi r1,r1,128 |
776 | mtlr r0 | |
777 | ld r31,-8(r1) | |
778 | blr | |
779 | ||
afdca0f2 UD |
780 | /* At this point we assume that the ucontext was created by a |
781 | rt_signal and we should use rt_sigreturn to restore the original | |
782 | state. As of the 2.4.21 kernel the ucontext is the first thing | |
783 | (offset 0) in the rt_signal frame and rt_sigreturn expects the | |
784 | ucontext address in R1. Normally the rt-signal trampoline handles | |
785 | this by popping dummy frame before the rt_signal syscall. In our | |
786 | case the stack may not be in its original (signal handler return with | |
787 | R1 pointing at the dummy frame) state. We do have the ucontext | |
609b4783 UD |
788 | address in R3, so simply copy R3 to R1 before the syscall. */ |
789 | L(do_sigret): | |
790 | mr r1,r3, | |
791 | li r0,SYS_ify(rt_sigreturn) | |
792 | sc | |
793 | /* No return. */ | |
794 | ||
795 | PSEUDO_END(__swapcontext) | |
796 | ||
5ef6ae4b | 797 | versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4) |