1998-11-24 14:14:54 +03:00
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/* $NetBSD: brk.S,v 1.4 1998/11/24 11:14:54 tsubai Exp $ */
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1997-03-29 23:55:50 +03:00
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#include "SYS.h"
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1998-05-25 19:35:06 +04:00
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.globl _ASM_LABEL(curbrk)
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1998-11-24 14:14:54 +03:00
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.globl minbrk
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.data
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minbrk: .long _C_LABEL(end) # XXX not used yet
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1997-03-29 23:55:50 +03:00
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.text
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1998-11-24 14:14:54 +03:00
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ENTRY(brk)
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1997-03-29 23:55:50 +03:00
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#ifdef PIC
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1998-11-24 14:14:54 +03:00
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mflr 10
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bl _GLOBAL_OFFSET_TABLE_@local-4
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mflr 9
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mtlr 10
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lwz 5,_C_LABEL(end)@got(9)
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1997-03-29 23:55:50 +03:00
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#else
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1998-05-25 19:35:06 +04:00
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lis 5,_C_LABEL(end)@ha # r5 = &_end
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addi 5,5,_C_LABEL(end)@l
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1998-11-24 14:14:54 +03:00
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#endif
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1997-03-29 23:55:50 +03:00
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cmplw 5,3 # if (&_end <= r3)
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bgt 0f
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mr 5,3 # r5 = r3
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0:
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mr 3,5 # new break value
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li 0,SYS_break
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sc # assume, that r5 is kept
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bso 1f
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1998-11-24 14:14:54 +03:00
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#ifdef PIC
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lwz 6,_ASM_LABEL(curbrk)@got(9)
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stw 5,0(6)
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#else
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1998-05-25 19:35:06 +04:00
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lis 6,_ASM_LABEL(curbrk)@ha # record new break
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stw 5,_ASM_LABEL(curbrk)@l(6)
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1998-11-24 14:14:54 +03:00
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#endif
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1997-03-29 23:55:50 +03:00
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blr # return 0
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1:
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1998-11-24 14:14:54 +03:00
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b PIC_PLT(_ASM_LABEL(cerror))
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