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* arm/crt0.S: Initialise __heap_limit when ARM_RDI_MONITOR is defined. 

* arm/syscalls.c: define __heap_limit global symbol.
	* arm/syscalls.c (_sbrk): Honour __heap_limit.
This commit is contained in:
Corinna Vinschen 2015-02-17 09:30:52 +00:00
parent 72ba8b107a
commit 8d98f956cc
3 changed files with 17 additions and 1 deletions
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6
libgloss/ChangeLog
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@ -1,3 +1,9 @@
2015-02-17 Renlin Li <renlin.li@arm.com>
* arm/crt0.S: Initialise __heap_limit when ARM_RDI_MONITOR is defined.
* arm/syscalls.c: define __heap_limit global symbol.
* arm/syscalls.c (_sbrk): Honour __heap_limit.
2015-02-11 Stefan Wallentowitz <stefan.wallentowitz@tum.de>
* or1k/or1k_uart.c: Write bugfix and cleanup/documentation.

5
libgloss/arm/crt0.S
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@ -123,6 +123,11 @@
#endif
ldr r0, .LC0 /* point at values read */
/* Set __heap_limit. */
ldr r1, [r0, #4]
ldr r2, =__heap_limit
str r1, [r2]
ldr r1, [r0, #0]
cmp r1, #0
bne .LC32

7
libgloss/arm/syscalls.c
View File

@ -587,6 +587,9 @@ _getpid (int n __attribute__ ((unused)))
return 1;
}
/* Heap limit returned from SYS_HEAPINFO Angel semihost call. */
uint __heap_limit = 0xcafedead;
caddr_t __attribute__((weak))
_sbrk (int incr)
{
@ -599,7 +602,9 @@ _sbrk (int incr)
prev_heap_end = heap_end;
if (heap_end + incr > stack_ptr)
if ((heap_end + incr > stack_ptr)
/* Honour heap limit if it's valid. */
|| (__heap_limit != 0xcafedead && heap_end + incr > __heap_limit))
{
/* Some of the libstdc++-v3 tests rely upon detecting
out of memory errors, so do not abort here. */