Mercurial > pub > dyncall > dyncall
annotate dyncallback/dyncall_callback_ppc64.c @ 202:030fbb70aa1b
- changed allocwx code:
* to introduce a call allowing to switch the written page to be executable (e.g. using mprotect)
* changed mmap based code so page is always W^X
| author | Tassilo Philipp |
|---|---|
| date | Mon, 20 Mar 2017 23:12:58 +0100 |
| parents | d48a8b8d2ef9 |
| children | 71c884e610f0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 | |
| 3 Package: dyncall | |
| 4 Library: dyncallback | |
| 5 File: dyncallback/dyncall_callback_ppc64.c | |
| 6 Description: Callback - Implementation Header for ppc64 | |
| 7 License: | |
| 8 | |
|
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9 Copyright (c) 2014-2016 Masanori Mitsugi <mitsugi@linux.vnet.ibm.com> |
| 0 | 10 |
| 11 Permission to use, copy, modify, and distribute this software for any | |
| 12 purpose with or without fee is hereby granted, provided that the above | |
| 13 copyright notice and this permission notice appear in all copies. | |
| 14 | |
| 15 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 16 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 17 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 18 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 */ | |
| 24 | |
| 25 | |
| 26 #include "dyncall_callback.h" | |
|
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27 #include "dyncall_alloc_wx.h" |
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28 #include "dyncall_thunk.h" |
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29 |
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30 /* Callback symbol. */ |
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31 extern void dcCallbackThunkEntry(); |
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32 |
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33 struct DCCallback /* ELF v1 | ELF v2 */ |
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34 { /* ------------------+------------------ */ |
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35 DCThunk thunk; /* offset 0 size 64 | offset 0 size 48 */ |
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36 DCCallbackHandler* handler; /* offset 64 size 8 | offset 48 size 8 */ |
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37 size_t stack_cleanup; /* offset 72 size 8 | offset 56 size 8 */ |
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38 void* userdata; /* offset 80 size 8 | offset 64 size 8 */ |
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39 }; |
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40 |
| 0 | 41 |
| 42 void dcbInitCallback(DCCallback* pcb, const char* signature, DCCallbackHandler* handler, void* userdata) | |
| 43 { | |
| 44 const char* ptr; | |
| 45 char ch; | |
| 46 | |
| 47 pcb->handler = handler; | |
| 48 pcb->userdata = userdata; | |
| 49 } | |
| 50 | |
| 51 DCCallback* dcbNewCallback(const char* signature, DCCallbackHandler* handler, void* userdata) | |
| 52 { | |
| 53 DCCallback* pcb; | |
| 54 int err = dcAllocWX(sizeof(DCCallback), (void**) &pcb); | |
| 202 | 55 if(err) |
| 56 return NULL; | |
| 0 | 57 |
| 58 dcbInitThunk(&pcb->thunk, dcCallbackThunkEntry); | |
| 59 dcbInitCallback(pcb, signature, handler, userdata); | |
| 60 | |
| 202 | 61 err = dcInitExecWX(pcb, sizeof(DCCallback)); |
| 62 if(err) { | |
| 63 dcFreeWX(pcb, sizeof(DCCallback)); | |
| 64 return NULL; | |
| 65 } | |
| 66 | |
| 0 | 67 return pcb; |
| 68 } | |
| 69 | |
| 70 void dcbFreeCallback(DCCallback* pcb) | |
| 71 { | |
| 72 dcFreeWX(pcb, sizeof(DCCallback)); | |
| 73 } | |
| 74 | |
| 75 void* dcbGetUserData(DCCallback* pcb) | |
| 76 { | |
| 77 return pcb->userdata; | |
| 78 } |