Mercurial > pub > dyncall > dyncall
annotate dyncallback/dyncall_callback_arm32_arm_gas.S @ 407:7364f285cac8
- use UAL syntax for some arm instructions for armhf targets, as clang's integrated as disallows pre-UAL syntax
| author | Tassilo Philipp |
|---|---|
| date | Sun, 03 Oct 2021 10:41:46 +0200 |
| parents | 351bb41d3bb1 |
| children |
| 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 | |
|
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351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
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9 Copyright (c) 2007-2021 Daniel Adler <dadler@uni-goettingen.de>, |
| 0 | 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 */ |
|
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:
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35 /* DCArgs_size = 24 */ /* for EABI/ATPCS/... */ |
|
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 */ |
|
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 */ |
|
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 */ | |
|
249
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 */ |
|
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 |
|
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. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
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changeset
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50 stmdb r13, {r4-r11, r13, r14} /* Permanent registers and stack pointer, etc... -> save area on stack (except counter). */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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51 mov r11, r13 /* Set frame pointer. */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
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52 sub r13, r13, #40 /* Adjust stack pointer. */ |
| 0 | 53 |
| 54 /* Grab arguments. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
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55 mov r4, #0 |
| 38 | 56 #if defined(DC__ABI_ARM_HF) |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
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57 stmdb r13!, {r4} /* Init freg_count and dreg_count to 0 */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
58 stmdb r13!, {r4} |
|
407
7364f285cac8
- use UAL syntax for some arm instructions for armhf targets, as clang's integrated as disallows pre-UAL syntax
Tassilo Philipp
parents:
406
diff
changeset
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59 vstmdb r13!, {d0-d7} /* Store all fp-registers in DCArgs' f[16] */ |
| 38 | 60 #endif |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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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. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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64 mov r0, r12 /* Parameter 0 (r0) = DCCallback pointer (r12, pointer to thunk). */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
65 mov r1, r13 /* Parameter 1 (r1) = DCArgs pointer (r13, stack pointer). */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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66 sub r13, r13, #DCValue_size /* Make room for return value. */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
67 mov r2, r13 /* Parameter 2 (r2) = results pointer. */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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68 ldr r3, [r12, #CTX_userdata] /* Parameter 3 (r3) = userdata pointer. */ |
| 0 | 69 |
| 70 /* Call. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
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71 ldr r4, [r12, #CTX_handler] /* Load callback handler pointer into r4. */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
72 mov r14, r15 /* Branch return address(r15) -> link register (r14) -- r15 always points to address of current + 2 instructions (= Epilog code). */ |
|
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
73 bx r4 /* Call. */ |
| 0 | 74 |
| 75 /* Return value. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
76 ldmia r13, {r0, r1} /* Load return value in r0 and r1. */ |
|
42
ecc9403e214a
- final touch for complete armhf callback support, yay
cslag
parents:
38
diff
changeset
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77 #if defined(DC__ABI_ARM_HF) |
|
407
7364f285cac8
- use UAL syntax for some arm instructions for armhf targets, as clang's integrated as disallows pre-UAL syntax
Tassilo Philipp
parents:
406
diff
changeset
|
78 vldmia r13, {d0} /* Same for floating point return value (if any). */ |
|
42
ecc9403e214a
- final touch for complete armhf callback support, yay
cslag
parents:
38
diff
changeset
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79 #endif |
| 0 | 80 |
| 81 /* Epilog. */ | |
|
406
351bb41d3bb1
- removed %-prefixes for register names from arm assembly files (was wrong to begin with, gas accepted them but the clang integrated assembler does not)
Tassilo Philipp
parents:
281
diff
changeset
|
82 ldmdb r11, {r4-r11, r13, r15} /* Restore permanent registers (restore stack ptr and program counter).@@@db not needed since we rewrite r13? */ |
| 0 | 83 |