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| author | Jeff Johnston <jjohnstn@redhat.com> | 2007-10-01 18:22:50 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2007-10-01 18:22:50 +0000 |
| commit | eae493d8a860ae720ade4ceabfb96b42859750d1 (patch) | |
| tree | c9b2fa79c0f46cfdd800746d28a3eb9331e6048b /libgloss/spu/sbrk.c | |
| parent | 571685454909cbe5af908b4a85a6fab6eb682216 (diff) | |
| download | cygnal-eae493d8a860ae720ade4ceabfb96b42859750d1.tar.gz cygnal-eae493d8a860ae720ade4ceabfb96b42859750d1.tar.bz2 cygnal-eae493d8a860ae720ade4ceabfb96b42859750d1.zip | |
2007-10-01 Patrick Mansfield <patmans@us.ibm.com>
* spu/sbrk.c: Use the current stack pointer value rather than the
maximum available memory to determine the amount of heap space
left. Without this change calling sbrk() can allocate space that
is currently in use on the stack.
Diffstat (limited to 'libgloss/spu/sbrk.c')
| -rw-r--r-- | libgloss/spu/sbrk.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libgloss/spu/sbrk.c b/libgloss/spu/sbrk.c index b0528c395..6f21b0379 100644 --- a/libgloss/spu/sbrk.c +++ b/libgloss/spu/sbrk.c @@ -37,7 +37,6 @@ Author: Andreas Neukoetter (ti95neuk@de.ibm.com) extern int errno; extern caddr_t _end; -#define RAMSIZE 262144 #define STACKSIZE 4096 void * @@ -47,6 +46,7 @@ sbrk (ptrdiff_t increment) caddr_t base; vector unsigned int sp_reg, sp_delta; vector unsigned int *sp_ptr; + caddr_t sps; /* The stack pointer register. */ volatile register vector unsigned int sp_r1 __asm__("1"); @@ -54,7 +54,8 @@ sbrk (ptrdiff_t increment) if (heap_ptr == NULL) heap_ptr = (caddr_t) & _end; - if (((RAMSIZE - STACKSIZE) - (int) heap_ptr) >= increment) + sps = (caddr_t) spu_extract (sp_r1, 0); + if (((int) sps - STACKSIZE - (int) heap_ptr) >= increment) { base = heap_ptr; heap_ptr += increment; |