From be8c406f9fea929e2eac4006c446f164ad25ba91 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Thu, 22 Sep 2016 19:56:41 -0400
Subject: nt32: implemented sigsetjmp().

---
 src/signal/nt32/sigsetjmp.s | 51 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/signal/nt32/sigsetjmp.s

(limited to 'src/signal')

diff --git a/src/signal/nt32/sigsetjmp.s b/src/signal/nt32/sigsetjmp.s
new file mode 100644
index 0000000..82e160e
--- /dev/null
+++ b/src/signal/nt32/sigsetjmp.s
@@ -0,0 +1,51 @@
+.text
+.globl	___sigsetjmp
+.globl	_sigsetjmp
+
+.def __sigsetjmp; .scl 2; .type 32; .endef
+.def sigsetjmp; .scl 2; .type 32; .endef
+
+___sigsetjmp:
+_sigsetjmp:
+				# int sigsetjmp(sigjmp_buf jmp_buf, int save_mask);
+				#
+				# 8(%esp): save_mask
+				# 4(%esp): jmp_buf
+				# 0(%esp): return address
+
+	movl  8(%esp),%edx	# edx  <-- save_mask
+	test  %edx,%edx 	# save signal mask?
+	jnz   1f		# yes: save mask
+	jmp   ___setjmp		# no:  setjmp
+
+1:
+				# typedef unsigned long __jmp_buf[6];
+				#
+				# typedef struct __jmp_buf_tag {
+				#	__jmp_buf __jb;
+				#	unsigned long __fl;
+				# 	unsigned long __ss[16];
+				# }
+				#
+
+	movl  4(%esp),%ecx	# ecx  <-- jmp_buf
+	popl  36(%ecx) 		# save return address to .__ss[2]
+	movl  %ebx,40(%ecx)	# save ebx (arbitrary choice) to .__ss[3]
+	movl  %ecx,%ebx		# save pointer to __jmp_buf to ebx
+
+	call  ___setjmp
+
+	pushl 36(%ebx) 		# push previously saved return address
+	movl  %ebx,4(%esp) 	# save pointer to __jmp_buf to 4(%esp) (arg 0)
+	movl  %eax,8(%esp)	# save setjmp return value to 8(%esp) (arg 1)
+	movl  40(%ebx),%ebx	# restore ebx from .__ss[3]
+
+
+	jmp ___sigsetjmp_tail	# defer to __sigsetjmp_tail
+
+
+	.section .got$sigsetjmp,"r"
+	.global __imp__sigsetjmp
+__imp__sigsetjmp:
+	.long _sigsetjmp
+	.linkonce discard
-- 
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