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HEAD
Bell 32V development
[unix-history]
/
usr
/
src
/
libc
/
sys
/
alloca.s
# like alloc, but automatic
# automatic free in return
.globl _alloca
_alloca:
.word 0x0000
subl2 4(ap),sp # crude allocation
movl 16(fp),r1 # pc
movq 8(fp),ap # new (old) ap and fp
bicl2 $3,sp # 4-byte align
addl2 $7*4,sp # reuse space of mscp
movl sp,r0 # return value
jmp (r1) # funny return