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https://github.com/alliedmodders/amxmodx.git
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101 lines
2.3 KiB
NASM
Executable File
101 lines
2.3 KiB
NASM
Executable File
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; (C)2005 by David "BAILOPAN" Anderson ;
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; register_native functions for x86 ;;;;;;
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; Based on the concept by Julien "dJeyL" Laurent ;
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; Thanks to T(+)rget for pushing me to implement this ;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;Licensed under the GNU General Public License, version 2
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;;This is a portion of AMX Mod X
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;; and is maintained by the AMX Mod X development team.
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;;Initializes the global variable
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section .text
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global amxx_DynaInit, _amxx_DynaInit
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;void amxx_DynaInit(void *ptr);
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amxx_DynaInit:
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_amxx_DynaInit:
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push ebp
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mov ebp, esp
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mov eax, [ebp+8] ;get pointer
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mov [GLOBAL_GATE], eax ;store
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mov eax, 1
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pop ebp
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ret
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;;Assembles the gateway function
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global amxx_DynaMake, _amxx_DynaMake
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;int amxx_DynaMake(char *buffer, int id);
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amxx_DynaMake:
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_amxx_DynaMake:
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push ebp
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mov ebp, esp
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push edi
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push esi
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mov edi, [ebp+8] ;buffer
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mov esi, _amxx_DynaFuncStart
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mov ecx, _amxx_DynaFuncEnd - _amxx_DynaFuncStart
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cld ;clear direction flag (just in case)
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rep movsb
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mov edi, [ebp+8] ;get buffer again
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;align us to mov eax, 1234 - on x86 this is 4 bytes
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add edi, (_amxx_DynaMoveOffset-_amxx_DynaFuncStart) + 1
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mov eax, [ebp+12]
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mov [edi], eax
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pop esi
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pop edi
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mov eax, 1
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pop ebp
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ret
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;;The gateway function we will re-assemble
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;; This is similar to dJeyL's but a tad more elegant, as it's written in pure assembly
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;; and NASM > GAS :')
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global amxx_DynaFunc, _amxx_DynaFunc
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;int amxx_DynaFunc(AMX *amx, cell *params);
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amxx_DynaFunc:
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_amxx_DynaFunc:
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_amxx_DynaFuncStart:
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push ebp
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mov ebp, esp
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;we're given an amx and params... we're also hardcoded for this though:
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_amxx_DynaMoveOffset:
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mov eax, 12345678h ;this old trick, we'll move in the real pointer in a bit.
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push dword [ebp+12] ;push params
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push dword [ebp+8] ;push amx
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push eax ;push the id
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call [GLOBAL_GATE] ;pass through teh global gateway.
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add esp, 12 ;reset stack oops
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pop ebp
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ret
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_amxx_DynaFuncEnd:
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;;Just returns the buffer size required
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global _amxx_DynaCodesize, amxx_DynaCodesize
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;int amxx_DynaCodesize()
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amxx_DynaCodesize:
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_amxx_DynaCodesize:
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push ebp
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mov ebp, esp
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; on x86 is this 17 bytes
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mov eax, _amxx_DynaFuncEnd - _amxx_DynaFuncStart
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pop ebp
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ret
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section .data
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GLOBAL_GATE DD 0
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