Mercurial > pub > dyncall > dyncall
annotate dyncallback/dyncall_callback_arm32_arm_gas.S @ 255:704c28fd9428
- added "Unknown" type as executable format #define next to PE, Mach and ELF ones for cases like Minix < 3.2.0
- allow builds on platforms missing mprotect() (e.g. Minix)
| author | Tassilo Philipp |
|---|---|
| date | Wed, 17 May 2017 02:39:41 +0200 |
| parents | 91db39538e78 |
| children | f5577f6bf97a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 | |
| 3 Package: dyncall | |
| 4 Library: dyncallback | |
| 38 | 5 File: dyncallback/dyncall_callback_arm32_arm_gas.S |
| 0 | 6 Description: Callback Thunk - Implementation for ARM32 (ARM mode) |
| 7 License: | |
| 8 | |
| 9 Copyright (c) 2007-2011 Daniel Adler <dadler@uni-goettingen.de>, | |
| 10 Tassilo Philipp <tphilipp@potion-studios.com> | |
| 11 | |
| 12 Permission to use, copy, modify, and distribute this software for any | |
| 13 purpose with or without fee is hereby granted, provided that the above | |
| 14 copyright notice and this permission notice appear in all copies. | |
| 15 | |
| 16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 23 | |
| 24 */ | |
| 25 | |
| 38 | 26 #include "../dyncall/dyncall_macros.h" |
| 0 | 27 |
| 28 .text | |
| 29 .code 32 /* ARM mode */ | |
| 30 | |
| 31 .globl dcCallbackThunkEntry | |
| 32 | |
| 33 /* sizes */ | |
|
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
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34 /* DCThunk_size = 8 */ |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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35 /* DCArgs_size = 24 */ /* for EABI/ATPCS/... */ |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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36 /* DCArgs_size = 96 */ /* for armhf */ |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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37 /* DCCallback_size = 20 */ |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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38 DCValue_size = 8 |
| 0 | 39 |
| 40 /* struct DCCallback offsets and size */ | |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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41 /* CTX_thunk = 0 */ |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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42 CTX_handler = 12 |
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91db39538e78
- replaced `.set' directives used to set symbol values in assembly files with (seemingly) more portable `=' syntax (e.g. older versions of Sun's `as' don't handle `.set')
Tassilo Philipp
parents:
50
diff
changeset
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43 CTX_userdata = 16 |
| 0 | 44 |
| 45 | |
| 46 /* Called by thunk - thunk stores pointer to DCCallback in r12 */ | |
| 47 dcCallbackThunkEntry: | |
| 48 | |
| 49 /* Prolog. This function never needs to spill inside its prolog, so just store the permanent registers. */ | |
| 50 stmdb %r13, {%r4-%r11, %r13, %r14} /* Permanent registers and stack pointer, etc... -> save area on stack (except counter). */ | |
| 51 mov %r11, %r13 /* Set frame pointer. */ | |
| 52 sub %r13, %r13, #40 /* Adjust stack pointer. */ | |
| 53 | |
| 54 /* Grab arguments. */ | |
| 55 mov %r4, #0 | |
| 38 | 56 #if defined(DC__ABI_ARM_HF) |
| 57 stmdb %r13!, {%r4} /* Init freg_count and dreg_count to 0 */ | |
| 58 stmdb %r13!, {%r4} | |
| 59 fstmdbd %r13!, {d0-d7} /* Store all fp-registers in DCArgs' f[16] */ | |
| 60 #endif | |
| 61 stmdb %r13!, {%r0-%r4, %r11} /* Spill first 4 args to DCArgs, along with reg_count (init to 0) and (stack) pointer to remaining args. */ | |
| 0 | 62 |
| 63 /* Prepare callback handler call. */ | |
| 64 mov %r0, %r12 /* Parameter 0 (r0) = DCCallback pointer (r12, pointer to thunk). */ | |
| 65 mov %r1, %r13 /* Parameter 1 (r1) = DCArgs pointer (r13, stack pointer). */ | |
| 66 sub %r13, %r13, #DCValue_size /* Make room for return value. */ | |
| 67 mov %r2, %r13 /* Parameter 2 (r2) = results pointer. */ | |
| 68 ldr %r3, [%r12, #CTX_userdata] /* Parameter 3 (r3) = userdata pointer. */ | |
| 69 | |
| 70 /* Call. */ | |
| 71 ldr %r4, [%r12, #CTX_handler] /* Load callback handler pointer into r4. */ | |
| 38 | 72 mov %r14, %r15 /* Branch return address(r15) -> link register (r14) -- r15 always points to address of current + 2 instructions (= Epilog code). */ |
| 0 | 73 bx %r4 /* Call. */ |
| 74 | |
| 75 /* Return value. */ | |
| 76 ldmia %r13, {%r0, %r1} /* Load return value in r0 and r1. */ | |
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ecc9403e214a
- final touch for complete armhf callback support, yay
cslag
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77 #if defined(DC__ABI_ARM_HF) |
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ecc9403e214a
- final touch for complete armhf callback support, yay
cslag
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78 fldmiad %r13, {%d0} /* Same for floating point return value (if any). */ |
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ecc9403e214a
- final touch for complete armhf callback support, yay
cslag
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79 #endif |
| 0 | 80 |
| 81 /* Epilog. */ | |
| 82 ldmdb %r11, {%r4-%r11, %r13, %r15} /* Restore permanent registers (restore stack ptr and program counter).@@@db not needed since we rewrite r13? */ | |
| 83 |