diff options
| author | Dale S. Rahn <rahnds@cvs.openbsd.org> | 1996-12-21 20:42:25 +0000 |
|---|---|---|
| committer | Dale S. Rahn <rahnds@cvs.openbsd.org> | 1996-12-21 20:42:25 +0000 |
| commit | 18bfa0d968e3c3bb24239eaf982fb33bb185bf19 (patch) | |
| tree | 0e19e42e1017544442510644e798db671db46527 /lib/libc/arch/powerpc/sys/sbrk.S | |
| parent | 3a2ca69baba476e6254a1a232cab2d0981b68db3 (diff) | |
Check-in of powerpc library support.
NOTE: This will not work until the other pieces are checked in.
This is primarily the NetBSD powerpc port, with modifications
to support ELF.
Diffstat (limited to 'lib/libc/arch/powerpc/sys/sbrk.S')
| -rw-r--r-- | lib/libc/arch/powerpc/sys/sbrk.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/libc/arch/powerpc/sys/sbrk.S b/lib/libc/arch/powerpc/sys/sbrk.S new file mode 100644 index 00000000000..c54fa839e8a --- /dev/null +++ b/lib/libc/arch/powerpc/sys/sbrk.S @@ -0,0 +1,32 @@ +#include "SYS.h" + + .data + .globl _end + .globl curbrk + .globl minbrk +curbrk: .long _end +minbrk: .long _end + + + .text +PSEUDO_PREFIX(sbrk,break) + + /* call break(curbrk + size) */ + addis 6,0,curbrk@h + ori 6,6,curbrk@l /* # 6 = &curbrk */ + lwz 5, 0(6) /* # 5 = *6 (old_curbrk) */ + add 3, 5, 3 /* # 3 = new_curbrk */ + mr 7, 3 + + sc + + /* check for error */ + cmpwi 0, 0 + beq+ sbrk_ok /* OK so this is stupid but I haven't read b */ + b cerror + + /* update, curbrk and return */ +sbrk_ok: + stw 7, 0(6) /* # remember, 6=&curbrk, 7=new_curbrk */ + mr 3, 5 /* # remember, 5=old_curbrk */ + blr |