92 lines
4.2 KiB
C
92 lines
4.2 KiB
C
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/**********
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* Copyright (c) 2004 Greg Parker. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY GREG PARKER ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**********/
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#ifndef PEAL_H
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#define PEAL_H
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#include <stdint.h>
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/*
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PealModule *PealLoad(void *mem)
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Loads ARM code and data from mem.
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If mem points into a relocatable block, that block must be locked before
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calling PealLoad() and must remain locked until after PealUnload().
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Note that PealLoad() may modify *mem. If mem points into a resource
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or feature memory block, then mem must point to the beginning of
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the block and the memory must be writeable with DmWrite().
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Returns NULL if the load fails for any reason.
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Warning: if you do not call PealUnload() before your program exits,
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your program may crash with a handle lock overflow error when run
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more than 16 times.
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PealModule *PealLoadFromResources(DmTypeID type, DmResID baseID)
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Loads ARM code and data from resources of the given type, starting
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with the given resource ID.
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The resources should be numbered sequentially starting with baseID,
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one for the ELF header and section list plus one for each ELF section.
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This is the output format generated by `peal-postlink -s ...`.
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DmGetResource() is used to load the resources. Some sections with
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no contents may have no resource, but still occupy a slot in the
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resource ID sequence. Some of the resources are kept open and
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locked until PealUnload() is called.
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Note that some of the resources may be modified using DmWrite().
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Returns NULL if the load fails for any reason.
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Warning: if you do not call PealUnload() before your program exits,
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your program may crash with a handle lock overflow error when run
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more than 16 times.
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void PealUnload(PealModule *m)
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Unloads ARM code and data previously loaded by PealLoad().
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The module must not be used after this call.
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Warning: if you do not call PealUnload() before your program exits,
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your program may crash with a handle lock overflow error when run
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more than 16 times.
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void *PealLookupSymbol(PealModule *m, char *query)
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Returns the address of a named ARM function or variable in module m.
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Returns NULL if the module contains no such function or variable.
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A function can be called by passing this address to PealCall().
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A variable can be read or written by dereferencing this address.
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uint32_t PealCall(PealModule *m, void *addr, void *arg)
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Calls the function at addr in ARM module m, passing it the given arg.
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Returns the value returned by that function.
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The ARM function PealArmStub() is used to prepare ARM global state.
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The called function should take zero or one arguments.
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*/
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typedef struct PealModule PealModule;
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PealModule *PealLoad(void *elf);
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PealModule *PealLoadFromResources(DmResType type, DmResID baseID);
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void PealUnload(PealModule *m);
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void *PealLookupSymbol(PealModule *m, char *query);
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uint32_t PealCall(PealModule *m, void *addr, void *arg);
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#endif
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