1 files changed, 50 insertions, 0 deletions
diff --git a/libpsn00b/libc/setjmp.S b/libpsn00b/libc/setjmp.S
new file mode 100644
index 0000000..fb0dc6b
--- /dev/null
+++ b/libpsn00b/libc/setjmp.S
@@ -0,0 +1,50 @@
+# PSn00bSDK setjmp/longjmp
+# (C) 2023 spicyjpeg - MPL licensed
+#
+# This is not a "proper" implementation of setjmp/longjmp as it does not save
+# COP0 and GTE registers, but it is fully compatible with the version found in
+# the BIOS.
+
+.set noreorder
+
+.section .text.setjmp, "ax", @progbits
+.global setjmp
+.type setjmp, @function
+
+setjmp:
+	sw   $ra, 0x00($a0)
+	sw   $sp, 0x04($a0)
+	sw   $fp, 0x08($a0)
+	sw   $s0, 0x0c($a0)
+	sw   $s1, 0x10($a0)
+	sw   $s2, 0x14($a0)
+	sw   $s3, 0x18($a0)
+	sw   $s4, 0x1c($a0)
+	sw   $s5, 0x20($a0)
+	sw   $s6, 0x24($a0)
+	sw   $s7, 0x28($a0)
+	sw   $gp, 0x2c($a0)
+
+	jr   $ra
+	li   $v0, 0
+
+.section .text.longjmp, "ax", @progbits
+.global longjmp
+.type longjmp, @function
+
+longjmp:
+	lw   $ra, 0x00($a0)
+	lw   $sp, 0x04($a0)
+	lw   $fp, 0x08($a0)
+	lw   $s0, 0x0c($a0)
+	lw   $s1, 0x10($a0)
+	lw   $s2, 0x14($a0)
+	lw   $s3, 0x18($a0)
+	lw   $s4, 0x1c($a0)
+	lw   $s5, 0x20($a0)
+	lw   $s6, 0x24($a0)
+	lw   $s7, 0x28($a0)
+	lw   $gp, 0x2c($a0)
+
+	jr   $ra
+	move $v0, $a1