Committed new register_native system

amxmodx/natives-amd64.asm

@@ -0,0 +1,85 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; (C)2005 by David "BAILOPAN" Anderson			 ;
+; register_native functions for amd64			 ;;;;;;
+; Based on the concept by Julien "dJeyL" Laurent	  ;
+; Thanks to T(+)rget for pushing me to implement this ;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;Licensed under the GNU General Public License, version 2
+;;This is a portion of AMX Mod X 
+;; and is maintained by the AMX Mod X development team.
+
+;;Initializes the global variable
+
+BITS 64
+
+section .text
+
+global amxx_DynaInit, _amxx_DynaInit
+;void amxx_DynaInit(void *ptr);
+amxx_DynaInit:
+_amxx_DynaInit:
+	mov		rax, rdi			;get pointer, first param is in rdi
+	mov		[GLOBAL_GATE], rax	;store
+	
+	mov		rax, 1
+	ret
+	
+;;Assembles the gateway function
+global amxx_DynaMake, _amxx_DynaMake
+;int amxx_DynaMake(char *buffer, int id);
+amxx_DynaMake:
+_amxx_DynaMake:
+	;we're not damaging the stack I think so we should be safe with no prologue
+	
+	;save these two we're about to destroy them
+	push	rsi		;push id
+	push	rdi		;push buffer
+	
+	mov		rsi, _amxx_DynaFuncStart
+	mov		rcx, _amxx_DynaFuncEnd - _amxx_DynaFuncStart
+	cld		;clear direction flag (just in case)
+	rep		movsb
+	
+	pop		rdi		;get buffer as destination
+	pop		rax		;get id
+	;align us to mov rsi, 1234... - on x86-64 this is 2 bytes after the differential
+	add		rdi, (_amxx_DynaMoveOffset-_amxx_DynaFuncStart) + 2
+	mov		[rdi], qword rax
+	
+	mov		rax, 1
+	ret
+
+;;The gateway function we will re-assemble
+;; This is similar to dJeyL's but a tad more elegant, as it's written in pure assembly
+;; and NASM > GAS :')
+global amxx_DynaFunc, _amxx_DynaFunc
+;int amxx_DynaFunc(AMX *amx, cell *params);
+amxx_DynaFunc:
+_amxx_DynaFunc:
+_amxx_DynaFuncStart:
+	push	rbp
+	mov		rbp, rsp
+	
+	;we're given an amx and params... we're also hardcoded for this though:
+	mov		rdx, rsi	;move 2nd param to 3rd 
+	mov		rsi, rdi	;move 1st param to 2nd
+	;this old trick, we'll move in the real pointer in a bit.
+_amxx_DynaMoveOffset:
+	mov		rsi, qword 1234567812345678h
+	call	[GLOBAL_GATE]		;pass through teh global gateway.
+	
+	pop		rbp
+	ret
+_amxx_DynaFuncEnd:
+
+;;Just returns the buffer size required
+global _amxx_DynaCodesize, amxx_DynaCodesize
+;int amxx_DynaCodesize()
+amxx_DynaCodesize:
+_amxx_DynaCodesize:
+	; on x86 is this 17 bytes
+	mov		rax, _amxx_DynaFuncEnd - _amxx_DynaFuncStart
+	ret
+	
+GLOBAL_GATE		DQ		0