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NetBSD/lib/libc/arch/powerpc/sys/brk.S

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Thinko in previous: we do always use an internal name.
2000-06-26 10:25:36 +04:00
/* $NetBSD: brk.S,v 1.9 2000/06/26 06:25:43 kleink Exp $ */
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
#include "SYS.h"
* On architectures using ELF, and conditionally on those in transition, rename _ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and _C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to avoid possible name clashes with identifiers used in user applications. * Do the same for minbrk on all architectures to avoid a GCC-specific (and on ELF architectures effectively useless) symbol reference renaming in MI code.
1999-01-15 01:48:18 +03:00
.globl _C_LABEL(__curbrk)
.globl _C_LABEL(__minbrk)
Change references to `end' to `_end' as not to invade (or being invaded by) the user's name space.
1999-03-31 15:53:07 +04:00
.globl _C_LABEL(_end)
Add PIC version.
1998-11-24 14:14:54 +03:00
Add internal names for brk() and sbrk().
2000-06-23 19:40:36 +04:00
#ifdef WEAK_ALIAS
WEAK_ALIAS(brk, _brk)
#endif
Add PIC version.
1998-11-24 14:14:54 +03:00
.data
* On architectures using ELF, and conditionally on those in transition, rename _ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and _C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to avoid possible name clashes with identifiers used in user applications. * Do the same for minbrk on all architectures to avoid a GCC-specific (and on ELF architectures effectively useless) symbol reference renaming in MI code.
1999-01-15 01:48:18 +03:00
_C_LABEL(__minbrk):
Change references to `end' to `_end' as not to invade (or being invaded by) the user's name space.
1999-03-31 15:53:07 +04:00
.long _C_LABEL(_end) # XXX not used yet
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
.text
Add internal names for brk() and sbrk().
2000-06-23 19:40:36 +04:00
ENTRY(_brk)
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
#ifdef PIC
Add PIC version.
1998-11-24 14:14:54 +03:00
mflr 10
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr 9
mtlr 10
Missed in end -> _end cleanup.
2000-02-24 18:37:34 +03:00
lwz 5,_C_LABEL(_end)@got(9)
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
#else
Missed in end -> _end cleanup.
2000-02-24 18:37:34 +03:00
lis 5,_C_LABEL(_end)@ha # r5 = &_end
addi 5,5,_C_LABEL(_end)@l
Add PIC version.
1998-11-24 14:14:54 +03:00
#endif
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
cmplw 5,3 # if (&_end <= r3)
bgt 0f
mr 5,3 # r5 = r3
0:
mr 3,5 # new break value
li 0,SYS_break
sc # assume, that r5 is kept
bso 1f
Add PIC version.
1998-11-24 14:14:54 +03:00
#ifdef PIC
* On architectures using ELF, and conditionally on those in transition, rename _ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and _C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to avoid possible name clashes with identifiers used in user applications. * Do the same for minbrk on all architectures to avoid a GCC-specific (and on ELF architectures effectively useless) symbol reference renaming in MI code.
1999-01-15 01:48:18 +03:00
lwz 6,_C_LABEL(__curbrk)@got(9)
Add PIC version.
1998-11-24 14:14:54 +03:00
stw 5,0(6)
#else
* On architectures using ELF, and conditionally on those in transition, rename _ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and _C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to avoid possible name clashes with identifiers used in user applications. * Do the same for minbrk on all architectures to avoid a GCC-specific (and on ELF architectures effectively useless) symbol reference renaming in MI code.
1999-01-15 01:48:18 +03:00
lis 6,_C_LABEL(__curbrk)@ha # record new break
stw 5,_C_LABEL(__curbrk)@l(6)
Add PIC version.
1998-11-24 14:14:54 +03:00
#endif
Architecture-specific bits for libc on the PowerPC. From Wolfgang Solfrank <ws@tools.de>
1997-03-29 23:55:50 +03:00
blr # return 0
1:
* On architectures using ELF, and conditionally on those in transition, rename _ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and _C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to avoid possible name clashes with identifiers used in user applications. * Do the same for minbrk on all architectures to avoid a GCC-specific (and on ELF architectures effectively useless) symbol reference renaming in MI code.
1999-01-15 01:48:18 +03:00
b PIC_PLT(_C_LABEL(__cerror))