First commit

1 files changed, 39 insertions, 0 deletions

diff --git a/libpsn00b/libc/start.s b/libpsn00b/libc/start.s
new file mode 100644
index 0000000..c9b529b
--- /dev/null
+++ b/libpsn00b/libc/start.s
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+# Start function!
+# This is essentially the entrypoint of the PS-EXE
+
+.set noreorder
+
+.section .text
+
+.global _start
+.type _start, @function
+_start:
+
+	addiu	$sp, -32
+	sw		$ra, 28($sp)
+	
+	la		$gp, _gp		# Very important to set!
+	
+	la		$a0, .bss		# What are the CORRECT symbols for BSS start and end?
+	la		$a1, _end
+.clear_bss:
+	sb		$0 , 0($a0)
+	blt		$a0, $a1, .clear_bss
+	addiu	$a0, 1
+	
+	la		$a0, _end+4		# Initialize heap for malloc (does not use BIOS maalloc)
+	li		$a1, 1572864
+	jal		InitHeap
+	nop
+	
+	move	$a0, $0			# No support for arguments for now
+	move	$a1, $0
+	
+	jal		main
+	nop
+	
+	lw		$ra, 28($sp)
+	addiu	$sp, 32
+	jr		$ra
+	nop
+	
\ No newline at end of file