import newlib-2000-02-17 snapshot

1 files changed, 65 insertions, 0 deletions

diff --git a/newlib/libc/sys/sysmec/crt0.S b/newlib/libc/sys/sysmec/crt0.S
new file mode 100644
index 000000000..ca7c88fe6
--- /dev/null
+++ b/newlib/libc/sys/sysmec/crt0.S
@@ -0,0 +1,65 @@
+#ifdef __mn10300__
+	.section .text
+	.global	_start
+_start:
+	mov _stack-8,a0		# Load up the stack pointer
+	mov a0,sp
+
+	mov _edata,a0		# Get the start/end of bss
+	mov _end,a1
+
+	cmp a0,a1		# If no bss, then do nothing
+	beq .L0
+
+	clr d0			# clear d0
+
+.L1:
+	movbu d0,(a0)		# Clear a byte and bump pointer
+	inc a0
+	cmp a0,a1
+	bne .L1
+
+.L0:
+	call ___main,[],0	# Call __main to run ctors/dtors
+	clr d0
+	clr d1
+	mov d0,(4,sp)
+	call _main,[],0		# Call main program
+	call _exit,[],0		# All done, no need to return or
+				# deallocate our stack.
+
+	.section ._stack
+_stack:	.long 	1
+#else
+	.section .text
+	.global	_start
+_start:
+	mov _stack-4,a3		# Load up the stack pointer and allocate
+				# our current frame.
+
+	mov _edata,a0		# Get the start/end of bss
+	mov _end,a1
+
+	cmp a0,a1		# If no bss, then do nothing
+	beqx .L0
+
+	sub d0,d0		# clear d0
+
+.L1:
+	movb d0,(a0)		# Clear a byte and bump pointer
+	add 1,a0
+	cmp a0,a1
+	bnex .L1
+
+.L0:
+	jsr ___main
+	sub d0,d0
+	mov d0,d1
+	mov d0,(a3)
+	jsr _main		# Call main program
+	jmp _exit		# All done, no need to return or
+				# deallocate our stack.
+
+	.section ._stack
+_stack:	.long 	1
+#endif