From 818fc0125e7d73fdf4f1a94f178254e5d05c9831 Mon Sep 17 00:00:00 2001
From: rsc <rsc>
Date: Tue, 28 Aug 2007 12:48:33 +0000
Subject: replace setjmp/longjmp with swtch

---
 setjmp.S | 49 -------------------------------------------------
 1 file changed, 49 deletions(-)
 delete mode 100644 setjmp.S

(limited to 'setjmp.S')

diff --git a/setjmp.S b/setjmp.S
deleted file mode 100644
index 3fe23c5..0000000
--- a/setjmp.S
+++ /dev/null
@@ -1,49 +0,0 @@
-#   int  setjmp(struct jmpbuf *jmp);
-#   void longjmp(struct jmpbuf *jmp);
-# 
-# Setjmp saves its stack environment in jmp for later use by longjmp.
-# It returns 0.
-# 
-# Longjmp restores the environment saved by the last call of setjmp.
-# It then causes execution to continue as if the call of setjmp
-# had just returned 1.
-# 
-# The caller of setjmp must not itself have returned in the interim.
-# All accessible data have values as of the time longjmp was called.
-#
-#    [Description, but not code, borrowed from Plan 9.]
-
-.globl setjmp
-setjmp:
-  movl 4(%esp), %eax
-
-  movl %ebx, 0(%eax)
-  movl %ecx, 4(%eax)
-  movl %edx, 8(%eax)
-  movl %esi, 12(%eax)
-  movl %edi, 16(%eax)
-  movl %esp, 20(%eax)
-  movl %ebp, 24(%eax)
-  pushl 0(%esp)   # %eip
-  popl 28(%eax)
-
-  movl $0, %eax   # return value
-  ret
-
-.globl longjmp
-longjmp:
-  movl 4(%esp), %eax
-
-  movl 0(%eax), %ebx
-  movl 4(%eax), %ecx
-  movl 8(%eax), %edx
-  movl 12(%eax), %esi
-  movl 16(%eax), %edi
-  movl 20(%eax), %esp
-  movl 24(%eax), %ebp
-
-  addl $4, %esp   # pop and discard %eip
-  pushl 28(%eax)  # push new %eip
-
-  movl $1, %eax   # return value (appears to come from setjmp!)
-  ret
-- 
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