20000317 sourceware import

libgloss/mcore/syscalls.S

@@ -0,0 +1,64 @@
+.macro FUNC_START name
+	.text
+	.globl \name
+	.globl _\name
+\name:
+_\name:
+.endm
+	
+FUNC_START _sbrk
+	mov	r4, r2			// save increment
+	lrw	r3, brkval
+	ldw	r2, (r3)		// get next spot
+
+	movi	r5, 7
+	addi	r2, 7			// round up to 8 bytes
+	andn	r2, r5
+
+	addu	r4, r2			// save updated pointer
+	stw	r4, (r3)
+	jmp	r15
+
+// brk() could go in here too...
+
+	.data
+	.import	_end
+brkval:	.long	_end
+
+	
+FUNC_START _exit
+	mov	r1, r1		// accomodate simulator glitch...
+	.short	0x5000
+	br	_exit		// hard loop here
+
+// 0x5001 - printf
+// 0x5002 - scanf
+	
+FUNC_START utime
+	.short	0x5003
+	jmp	r15
+
+
+.macro stub name value
+FUNC_START \name
+	movi	r1, \value
+	.short  0x50FF
+	jmp	r15
+.endm
+
+stub _close   6
+stub _lseek  19
+stub _open    5	
+stub _read    3
+stub _times  43
+stub _unlink 10
+stub _write   4
+	
+//stub access  33
+//stub creat    8
+//stub link     9
+//stub time    13
+
+//stub profil 98  // movi r6, 2
+//stub lprofil 98 // movi r6, 4
+