From e3a9601cdc0ea5cb5d2a43ea7e8f0f4bf8afdbbf Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Thu, 22 Sep 2016 00:19:02 -0400
Subject: nt32: implemented setjmp(), longjmp().

---
 src/setjmp/nt32/longjmp.s | 18 +++++++++++++++++-
 src/setjmp/nt32/setjmp.s  | 14 ++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/setjmp/nt32/longjmp.s b/src/setjmp/nt32/longjmp.s
index 73b2e61..045b93d 100644
--- a/src/setjmp/nt32/longjmp.s
+++ b/src/setjmp/nt32/longjmp.s
@@ -10,7 +10,23 @@
 ___longjmp:
 __longjmp:
 _longjmp:
-	test %edx, %edx		# is val zero?
+	movl 4(%esp), %ecx	# jump buffer
+	movl 8(%esp), %eax	# val
+
+	test %eax, %eax		# is val zero?
+	jne  1f			# no:  return val
+	xor  $1,   %eax		# yes: return one
+
+1:
+	movl 20(%ecx), %esi	# restore regs
+	movl 16(%ecx), %edi
+	movl 12(%ecx), %ebp
+	movl 8(%ecx),  %ebx
+
+	movl 4(%ecx),  %esp	# original stack pointer
+
+	movl (%ecx),   %edx	# original return address
+	jmp  *%edx
 
 	.section .got$longjmp
 	.global __imp__longjmp
diff --git a/src/setjmp/nt32/setjmp.s b/src/setjmp/nt32/setjmp.s
index 7ef6485..d00fba0 100644
--- a/src/setjmp/nt32/setjmp.s
+++ b/src/setjmp/nt32/setjmp.s
@@ -10,6 +10,20 @@
 ___setjmp:
 __setjmp:
 _setjmp:
+	movl 4(%esp), %edx	# jump buffer
+
+	movl (%esp),  %eax	# return address
+	movl %eax,    (%edx)
+
+	leal 4(%esp), %ecx	# caller's stack pointer
+	movl %ecx,    4(%edx)
+
+	movl %ebx,    8(%edx)
+	movl %ebp,    12(%edx)
+	movl %edi,    16(%edx)
+	movl %esi,    20(%edx)
+
+	xor  %eax,%eax
 	ret
 
 	.section .got$setjmp,"r"
-- 
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