Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

I have no idea why this syscall wrapper does some very un-unix-like 

argument prefrobbing, in particular, it computes max(addr, __minbrk)
and uses that. The code is like this even in the ancient libc/i386 tree,
back to the earliest rev 1.2. I did not see it Lite 1, but I'm not totally
sure what the random site I found was serving up.
*
* However, I do know that it should use jb and not jl.
*
This commit is contained in:
ross 2001-05-06 19:27:07 +00:00
parent 573ce64c6b
commit b25c2304f3
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/libc/arch/i386/sys/brk.S
View File

@ -1,4 +1,4 @@
/* $NetBSD: brk.S,v 1.17 2000/12/08 22:57:57 mycroft Exp $ */
/* $NetBSD: brk.S,v 1.18 2001/05/06 19:27:07 ross Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@ -40,7 +40,7 @@
#include <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: brk.S,v 1.17 2000/12/08 22:57:57 mycroft Exp $")
RCSID("$NetBSD: brk.S,v 1.18 2001/05/06 19:27:07 ross Exp $")
#endif /* SYSLIBC_SCCS and not lint */
#include "SYS.h"
@ -65,7 +65,7 @@ ENTRY(_brk)
movl PIC_GOT(_C_LABEL(__minbrk)),%edx
PIC_EPILOGUE
cmpl %ecx,(%edx)
jl 1f
jb 1f
movl (%edx),%ecx
movl %ecx,4(%esp)
1:
@ -85,7 +85,7 @@ err:
#else
movl 4(%esp),%ecx
cmpl %ecx,_C_LABEL(__minbrk)
jl 1f
jb 1f
movl _C_LABEL(__minbrk),%ecx
movl %ecx,4(%esp)
1: