diff options
| author | Alexander Fedotov <alfedotov@gmail.com> | 2019-08-02 15:33:44 +0300 |
|---|---|---|
| committer | Richard Earnshaw <Richard.Earnshaw@arm.com> | 2019-08-05 15:00:53 +0300 |
| commit | dfffe683038357d106893ef1ba30462b31e7b589 (patch) | |
| tree | 1f567eeb4bd7b78b543d59d4862f40bc45d11764 /newlib/libc/sys | |
| parent | 37e80fbb1c329ab39d154a78fa6d99f28d220dfe (diff) | |
Align libgloss/arm and libc/sys/arm sources: HeapInfo and __heap_limit
Applied changes from commit 8d98f95:
* 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.
Applied changes from commit 8d98f95:
Fixed semihosting for ARM when heapinfo not provided by debugger
Diffstat (limited to 'newlib/libc/sys')
| -rw-r--r-- | newlib/libc/sys/arm/crt0.S | 7 | ||||
| -rw-r--r-- | newlib/libc/sys/arm/syscalls.c | 9 |
2 files changed, 14 insertions, 2 deletions
diff --git a/newlib/libc/sys/arm/crt0.S b/newlib/libc/sys/arm/crt0.S index 40bbc3d69..a55aa365b 100644 --- a/newlib/libc/sys/arm/crt0.S +++ b/newlib/libc/sys/arm/crt0.S @@ -282,6 +282,13 @@ #endif ldr r0, .LC0 /* Point at values read. */ + /* Set __heap_limit. */ + ldr r1, [r0, #4] + cmp r1, #0 + beq .LC33 + ldr r2, =__heap_limit + str r1, [r2] +.LC33: ldr r1, [r0, #0] cmp r1, #0 bne .LC32 diff --git a/newlib/libc/sys/arm/syscalls.c b/newlib/libc/sys/arm/syscalls.c index b52107491..a2997b44c 100644 --- a/newlib/libc/sys/arm/syscalls.c +++ b/newlib/libc/sys/arm/syscalls.c @@ -487,10 +487,13 @@ _getpid (void) return (pid_t)1; } +/* Heap limit returned from SYS_HEAPINFO Angel semihost call. */ +uint __heap_limit = 0xcafedead; + void * __attribute__((weak)) _sbrk (ptrdiff_t incr) { - extern char end asm ("end"); /* Defined by the linker. */ + extern char end asm ("end"); /* Defined by the linker. */ static char * heap_end; char * prev_heap_end; @@ -499,7 +502,9 @@ _sbrk (ptrdiff_t 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 > (char *)__heap_limit)) { /* Some of the libstdc++-v3 tests rely upon detecting out of memory errors, so do not abort here. */ |