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HEAD
do not allow brk() below _end
[unix-history]
/
usr
/
src
/
lib
/
libc
/
vax
/
sys
/
brk.s
/* brk.s 4.2 83/07/26 */
#include "SYS.h"
#define SYS_brk 17
.globl curbrk
.globl minbrk
ENTRY(brk)
cmpl 4(ap),minbrk
bgeq ok
movl minbrk,4(ap)
ok:
chmk $SYS_brk
jcs err
movl 4(ap),curbrk
clrl r0
ret
err:
jmp cerror