Changes in v1.8.3 (3/18/2003) (brianp)

- Added _alloca() function because Mingw32 generates code that needs it
- Defined _mainCRTStartup in fathelp.asm because Mingw32 looks for that symbol

svn path=/trunk/; revision=4342

freeldr/freeldr/CHANGELOG

@@ -1,3 +1,8 @@
+Changes in v1.8.3 (3/18/2003) (brianp)
+
+- Added _alloca() function because Mingw32 generates code that needs it
+- Defined _mainCRTStartup in fathelp.asm because Mingw32 looks for that symbol
+
 Changes in v1.8.2 (1/24/2003) (ekohl)
 
 - Relaxed check for Int13-Extension support.

freeldr/freeldr/Makefile

@@ -205,7 +205,8 @@ ARCH_OBJS	=	fathelp.o	\
 				drvmap.o	\
 				int386.o	\
 				i386disk.o	\
-				portio.o
+				portio.o	\
+				_alloca.o		# For Mingw32 builds
 
 RTL_OBJS	=	print.o		\
 				stdlib.o	\

freeldr/freeldr/arch/i386/_alloca.S

@@ -0,0 +1,32 @@
+/* stuff needed for libgcc on win32.  */
+
+//#ifdef L_chkstk
+
+	.global ___chkstk
+	.global	__alloca
+___chkstk:
+__alloca:
+	pushl  %ecx		/* save temp */
+	movl   %esp,%ecx	/* get sp */
+	addl   $0x8,%ecx	/* and point to return addr */
+
+probe: 	cmpl   $0x1000,%eax	/* > 4k ?*/
+	jb    done		
+
+	subl   $0x1000,%ecx  		/* yes, move pointer down 4k*/
+	orl    $0x0,(%ecx)   		/* probe there */
+	subl   $0x1000,%eax  	 	/* decrement count */
+	jmp    probe           	 	/* and do it again */
+
+done: 	subl   %eax,%ecx	   
+	orl    $0x0,(%ecx)	/* less that 4k, just peek here */
+
+	movl   %esp,%eax
+	movl   %ecx,%esp	/* decrement stack */
+
+	movl   (%eax),%ecx	/* recover saved temp */
+	movl   4(%eax),%eax	/* get return address */
+	jmp    *%eax	
+
+
+//#endif

freeldr/freeldr/arch/i386/fathelp.asm

@@ -52,6 +52,8 @@ BootPartition			equ		0x7dfd
 ; This code is loaded at 0000:8000 so we have to
 ; encode a jmp instruction to jump to 0000:8200
 
+global _mainCRTStartup	; For Mingw32 builds where the linker looks for this symbol
+_mainCRTStartup:
 global start
 start:
         db	0xe9

freeldr/freeldr/include/version.h

@@ -22,7 +22,7 @@
 
 
 /* just some stuff */
-#define VERSION			"FreeLoader v1.8.2"
+#define VERSION			"FreeLoader v1.8.3"
 #define COPYRIGHT		"Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>"
 #define AUTHOR_EMAIL	"<brianp@sginet.com>"
 #define BY_AUTHOR		"by Brian Palmer"
@@ -36,7 +36,7 @@
 //
 #define FREELOADER_MAJOR_VERSION	1
 #define FREELOADER_MINOR_VERSION	8
-#define FREELOADER_PATCH_VERSION	2
+#define FREELOADER_PATCH_VERSION	3
 
 
 PUCHAR	GetFreeLoaderVersionString(VOID);