OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [config/] [arm/] [libunwind.S] - Blame information for rev 734

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 734 jeremybenn
/* Support functions for the unwinder.
2
   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
3
   Free Software Foundation, Inc.
4
   Contributed by Paul Brook
5
 
6
   This file is free software; you can redistribute it and/or modify it
7
   under the terms of the GNU General Public License as published by the
8
   Free Software Foundation; either version 3, or (at your option) any
9
   later version.
10
 
11
   This file is distributed in the hope that it will be useful, but
12
   WITHOUT ANY WARRANTY; without even the implied warranty of
13
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
   General Public License for more details.
15
 
16
   Under Section 7 of GPL version 3, you are granted additional
17
   permissions described in the GCC Runtime Library Exception, version
18
   3.1, as published by the Free Software Foundation.
19
 
20
   You should have received a copy of the GNU General Public License and
21
   a copy of the GCC Runtime Library Exception along with this program;
22
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23
   .  */
24
 
25
/* An executable stack is *not* required for these functions.  */
26
#if defined(__ELF__) && defined(__linux__)
27
.section .note.GNU-stack,"",%progbits
28
.previous
29
#endif
30
 
31
#ifdef __ARM_EABI__
32
/* Some attributes that are common to all routines in this file.  */
33
        /* Tag_ABI_align_needed: This code does not require 8-byte
34
           alignment from the caller.  */
35
        /* .eabi_attribute 24, 0  -- default setting.  */
36
        /* Tag_ABI_align_preserved: This code preserves 8-byte
37
           alignment in any callee.  */
38
        .eabi_attribute 25, 1
39
#endif /* __ARM_EABI__ */
40
 
41
#ifndef __symbian__
42
 
43
#include "lib1funcs.S"
44
 
45
.macro UNPREFIX name
46
        .global SYM (\name)
47
        EQUIV SYM (\name), SYM (__\name)
48
.endm
49
 
50
#if (__ARM_ARCH__ == 4)
51
/* Some coprocessors require armv5.  We know this code will never be run on
52
   other cpus.  Tell gas to allow armv5, but only mark the objects as armv4.
53
 */
54
.arch armv5t
55
#ifdef __ARM_ARCH_4T__
56
.object_arch armv4t
57
#else
58
.object_arch armv4
59
#endif
60
#endif
61
 
62
#ifdef __ARM_ARCH_6M__
63
 
64
/* r0 points to a 16-word block.  Upload these values to the actual core
65
   state.  */
66
FUNC_START restore_core_regs
67
        mov r1, r0
68
        add r1, r1, #52
69
        ldmia r1!, {r3, r4, r5}
70
        sub r3, r3, #4
71
        mov ip, r3
72
        str r5, [r3]
73
        mov lr, r4
74
        /* Restore r8-r11.  */
75
        mov r1, r0
76
        add r1, r1, #32
77
        ldmia r1!, {r2, r3, r4, r5}
78
        mov r8, r2
79
        mov r9, r3
80
        mov sl, r4
81
        mov fp, r5
82
        mov r1, r0
83
        add r1, r1, #8
84
        ldmia r1!, {r2, r3, r4, r5, r6, r7}
85
        ldr r1, [r0, #4]
86
        ldr r0, [r0]
87
        mov sp, ip
88
        pop {pc}
89
        FUNC_END restore_core_regs
90
        UNPREFIX restore_core_regs
91
 
92
/* ARMV6M does not have coprocessors, so these should never be used.  */
93
FUNC_START gnu_Unwind_Restore_VFP
94
        RET
95
 
96
/* Store VFR regsters d0-d15 to the address in r0.  */
97
FUNC_START gnu_Unwind_Save_VFP
98
        RET
99
 
100
/* Load VFP registers d0-d15 from the address in r0.
101
   Use this to load from FSTMD format.  */
102
FUNC_START gnu_Unwind_Restore_VFP_D
103
        RET
104
 
105
/* Store VFP registers d0-d15 to the address in r0.
106
   Use this to store in FLDMD format.  */
107
FUNC_START gnu_Unwind_Save_VFP_D
108
        RET
109
 
110
/* Load VFP registers d16-d31 from the address in r0.
111
   Use this to load from FSTMD (=VSTM) format.  Needs VFPv3.  */
112
FUNC_START gnu_Unwind_Restore_VFP_D_16_to_31
113
        RET
114
 
115
/* Store VFP registers d16-d31 to the address in r0.
116
   Use this to store in FLDMD (=VLDM) format.  Needs VFPv3.  */
117
FUNC_START gnu_Unwind_Save_VFP_D_16_to_31
118
        RET
119
 
120
FUNC_START gnu_Unwind_Restore_WMMXD
121
        RET
122
 
123
FUNC_START gnu_Unwind_Save_WMMXD
124
        RET
125
 
126
FUNC_START gnu_Unwind_Restore_WMMXC
127
        RET
128
 
129
FUNC_START gnu_Unwind_Save_WMMXC
130
        RET
131
 
132
.macro  UNWIND_WRAPPER name nargs
133
        FUNC_START \name
134
        /* Create a phase2_vrs structure.  */
135
        /* Save r0 in the PC slot so we can use it as a scratch register.  */
136
        push {r0}
137
        add r0, sp, #4
138
        push {r0, lr} /* Push original SP and LR.  */
139
        /* Make space for r8-r12.  */
140
        sub sp, sp, #20
141
        /* Save low registers.  */
142
        push {r0, r1, r2, r3, r4, r5, r6, r7}
143
        /* Save high registers.  */
144
        add r0, sp, #32
145
        mov r1, r8
146
        mov r2, r9
147
        mov r3, sl
148
        mov r4, fp
149
        mov r5, ip
150
        stmia r0!, {r1, r2, r3, r4, r5}
151
        /* Restore original low register values.  */
152
        add r0, sp, #4
153
        ldmia r0!, {r1, r2, r3, r4, r5}
154
        /* Restore orginial r0.  */
155
        ldr r0, [sp, #60]
156
        str r0, [sp]
157
        /* Demand-save flags, plus an extra word for alignment.  */
158
        mov r3, #0
159
        push {r2, r3}
160
        /* Point r1 at the block.  Pass r[0..nargs) unchanged.  */
161
        add r\nargs, sp, #4
162
 
163
        bl SYM (__gnu\name)
164
 
165
        ldr r3, [sp, #64]
166
        add sp, sp, #72
167
        bx r3
168
 
169
        FUNC_END \name
170
        UNPREFIX \name
171
.endm
172
 
173
#else /* !__ARM_ARCH_6M__ */
174
 
175
/* r0 points to a 16-word block.  Upload these values to the actual core
176
   state.  */
177
ARM_FUNC_START restore_core_regs
178
        /* We must use sp as the base register when restoring sp.  Push the
179
           last 3 registers onto the top of the current stack to achieve
180
           this.  */
181
        add r1, r0, #52
182
        ldmia r1, {r3, r4, r5}  /* {sp, lr, pc}.  */
183
#if defined(__thumb2__)
184
        /* Thumb-2 doesn't allow sp in a load-multiple instruction, so push
185
           the target address onto the target stack.  This is safe as
186
           we're always returning to somewhere further up the call stack.  */
187
        mov ip, r3
188
        mov lr, r4
189
        str r5, [ip, #-4]!
190
#elif defined(__INTERWORKING__)
191
        /* Restore pc into ip.  */
192
        mov r2, r5
193
        stmfd sp!, {r2, r3, r4}
194
#else
195
        stmfd sp!, {r3, r4, r5}
196
#endif
197
        /* Don't bother restoring ip.  */
198
        ldmia r0, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp}
199
#if defined(__thumb2__)
200
        /* Pop the return address off the target stack.  */
201
        mov sp, ip
202
        pop {pc}
203
#elif defined(__INTERWORKING__)
204
        /* Pop the three registers we pushed earlier.  */
205
        ldmfd sp, {ip, sp, lr}
206
        bx ip
207
#else
208
        ldmfd sp, {sp, lr, pc}
209
#endif
210
        FUNC_END restore_core_regs
211
        UNPREFIX restore_core_regs
212
 
213
/* Load VFP registers d0-d15 from the address in r0.
214
   Use this to load from FSTMX format.  */
215
ARM_FUNC_START gnu_Unwind_Restore_VFP
216
        /* Use the generic coprocessor form so that gas doesn't complain
217
           on soft-float targets.  */
218
        ldc   p11,cr0,[r0],{0x21} /* fldmiax r0, {d0-d15} */
219
        RET
220
 
221
/* Store VFP registers d0-d15 to the address in r0.
222
   Use this to store in FSTMX format.  */
223
ARM_FUNC_START gnu_Unwind_Save_VFP
224
        /* Use the generic coprocessor form so that gas doesn't complain
225
           on soft-float targets.  */
226
        stc   p11,cr0,[r0],{0x21} /* fstmiax r0, {d0-d15} */
227
        RET
228
 
229
/* Load VFP registers d0-d15 from the address in r0.
230
   Use this to load from FSTMD format.  */
231
ARM_FUNC_START gnu_Unwind_Restore_VFP_D
232
        ldc   p11,cr0,[r0],{0x20} /* fldmiad r0, {d0-d15} */
233
        RET
234
 
235
/* Store VFP registers d0-d15 to the address in r0.
236
   Use this to store in FLDMD format.  */
237
ARM_FUNC_START gnu_Unwind_Save_VFP_D
238
        stc   p11,cr0,[r0],{0x20} /* fstmiad r0, {d0-d15} */
239
        RET
240
 
241
/* Load VFP registers d16-d31 from the address in r0.
242
   Use this to load from FSTMD (=VSTM) format.  Needs VFPv3.  */
243
ARM_FUNC_START gnu_Unwind_Restore_VFP_D_16_to_31
244
        ldcl  p11,cr0,[r0],{0x20} /* vldm r0, {d16-d31} */
245
        RET
246
 
247
/* Store VFP registers d16-d31 to the address in r0.
248
   Use this to store in FLDMD (=VLDM) format.  Needs VFPv3.  */
249
ARM_FUNC_START gnu_Unwind_Save_VFP_D_16_to_31
250
        stcl  p11,cr0,[r0],{0x20} /* vstm r0, {d16-d31} */
251
        RET
252
 
253
ARM_FUNC_START gnu_Unwind_Restore_WMMXD
254
        /* Use the generic coprocessor form so that gas doesn't complain
255
           on non-iWMMXt targets.  */
256
        ldcl  p1, cr0, [r0], #8 /* wldrd wr0, [r0], #8 */
257
        ldcl  p1, cr1, [r0], #8 /* wldrd wr1, [r0], #8 */
258
        ldcl  p1, cr2, [r0], #8 /* wldrd wr2, [r0], #8 */
259
        ldcl  p1, cr3, [r0], #8 /* wldrd wr3, [r0], #8 */
260
        ldcl  p1, cr4, [r0], #8 /* wldrd wr4, [r0], #8 */
261
        ldcl  p1, cr5, [r0], #8 /* wldrd wr5, [r0], #8 */
262
        ldcl  p1, cr6, [r0], #8 /* wldrd wr6, [r0], #8 */
263
        ldcl  p1, cr7, [r0], #8 /* wldrd wr7, [r0], #8 */
264
        ldcl  p1, cr8, [r0], #8 /* wldrd wr8, [r0], #8 */
265
        ldcl  p1, cr9, [r0], #8 /* wldrd wr9, [r0], #8 */
266
        ldcl  p1, cr10, [r0], #8 /* wldrd wr10, [r0], #8 */
267
        ldcl  p1, cr11, [r0], #8 /* wldrd wr11, [r0], #8 */
268
        ldcl  p1, cr12, [r0], #8 /* wldrd wr12, [r0], #8 */
269
        ldcl  p1, cr13, [r0], #8 /* wldrd wr13, [r0], #8 */
270
        ldcl  p1, cr14, [r0], #8 /* wldrd wr14, [r0], #8 */
271
        ldcl  p1, cr15, [r0], #8 /* wldrd wr15, [r0], #8 */
272
        RET
273
 
274
ARM_FUNC_START gnu_Unwind_Save_WMMXD
275
        /* Use the generic coprocessor form so that gas doesn't complain
276
           on non-iWMMXt targets.  */
277
        stcl  p1, cr0, [r0], #8 /* wstrd wr0, [r0], #8 */
278
        stcl  p1, cr1, [r0], #8 /* wstrd wr1, [r0], #8 */
279
        stcl  p1, cr2, [r0], #8 /* wstrd wr2, [r0], #8 */
280
        stcl  p1, cr3, [r0], #8 /* wstrd wr3, [r0], #8 */
281
        stcl  p1, cr4, [r0], #8 /* wstrd wr4, [r0], #8 */
282
        stcl  p1, cr5, [r0], #8 /* wstrd wr5, [r0], #8 */
283
        stcl  p1, cr6, [r0], #8 /* wstrd wr6, [r0], #8 */
284
        stcl  p1, cr7, [r0], #8 /* wstrd wr7, [r0], #8 */
285
        stcl  p1, cr8, [r0], #8 /* wstrd wr8, [r0], #8 */
286
        stcl  p1, cr9, [r0], #8 /* wstrd wr9, [r0], #8 */
287
        stcl  p1, cr10, [r0], #8 /* wstrd wr10, [r0], #8 */
288
        stcl  p1, cr11, [r0], #8 /* wstrd wr11, [r0], #8 */
289
        stcl  p1, cr12, [r0], #8 /* wstrd wr12, [r0], #8 */
290
        stcl  p1, cr13, [r0], #8 /* wstrd wr13, [r0], #8 */
291
        stcl  p1, cr14, [r0], #8 /* wstrd wr14, [r0], #8 */
292
        stcl  p1, cr15, [r0], #8 /* wstrd wr15, [r0], #8 */
293
        RET
294
 
295
ARM_FUNC_START gnu_Unwind_Restore_WMMXC
296
        /* Use the generic coprocessor form so that gas doesn't complain
297
           on non-iWMMXt targets.  */
298
        ldc2  p1, cr8, [r0], #4 /* wldrw wcgr0, [r0], #4 */
299
        ldc2  p1, cr9, [r0], #4 /* wldrw wcgr1, [r0], #4 */
300
        ldc2  p1, cr10, [r0], #4 /* wldrw wcgr2, [r0], #4 */
301
        ldc2  p1, cr11, [r0], #4 /* wldrw wcgr3, [r0], #4 */
302
        RET
303
 
304
ARM_FUNC_START gnu_Unwind_Save_WMMXC
305
        /* Use the generic coprocessor form so that gas doesn't complain
306
           on non-iWMMXt targets.  */
307
        stc2  p1, cr8, [r0], #4 /* wstrw wcgr0, [r0], #4 */
308
        stc2  p1, cr9, [r0], #4 /* wstrw wcgr1, [r0], #4 */
309
        stc2  p1, cr10, [r0], #4 /* wstrw wcgr2, [r0], #4 */
310
        stc2  p1, cr11, [r0], #4 /* wstrw wcgr3, [r0], #4 */
311
        RET
312
 
313
/* Wrappers to save core registers, then call the real routine.   */
314
 
315
.macro  UNWIND_WRAPPER name nargs
316
        ARM_FUNC_START \name
317
        /* Create a phase2_vrs structure.  */
318
        /* Split reg push in two to ensure the correct value for sp.  */
319
#if defined(__thumb2__)
320
        mov ip, sp
321
        push {lr} /* PC is ignored.  */
322
        push {ip, lr} /* Push original SP and LR.  */
323
#else
324
        stmfd sp!, {sp, lr, pc}
325
#endif
326
        stmfd sp!, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp, ip}
327
 
328
        /* Demand-save flags, plus an extra word for alignment.  */
329
        mov r3, #0
330
        stmfd sp!, {r2, r3}
331
 
332
        /* Point r1 at the block.  Pass r[0..nargs) unchanged.  */
333
        add r\nargs, sp, #4
334
#if defined(__thumb__) && !defined(__thumb2__)
335
        /* Switch back to thumb mode to avoid interworking hassle.  */
336
        adr ip, .L1_\name
337
        orr ip, ip, #1
338
        bx ip
339
        .thumb
340
.L1_\name:
341
        bl SYM (__gnu\name) __PLT__
342
        ldr r3, [sp, #64]
343
        add sp, #72
344
        bx r3
345
#else
346
        bl SYM (__gnu\name) __PLT__
347
        ldr lr, [sp, #64]
348
        add sp, sp, #72
349
        RET
350
#endif
351
        FUNC_END \name
352
        UNPREFIX \name
353
.endm
354
 
355
#endif /* !__ARM_ARCH_6M__ */
356
 
357
UNWIND_WRAPPER _Unwind_RaiseException 1
358
UNWIND_WRAPPER _Unwind_Resume 1
359
UNWIND_WRAPPER _Unwind_Resume_or_Rethrow 1
360
UNWIND_WRAPPER _Unwind_ForcedUnwind 3
361
UNWIND_WRAPPER _Unwind_Backtrace 2
362
 
363
#endif  /* ndef __symbian__ */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.