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ARM toolchain: heap setup micro-optimisation #11701

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Merged
merged 1 commit into from
Oct 18, 2019
Merged

ARM toolchain: heap setup micro-optimisation #11701

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5 changes: 2 additions & 3 deletions platform/source/mbed_retarget.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -927,7 +927,6 @@ __asm(".global __use_no_semihosting\n\t");
// Through weak-reference, we can check if ARM_LIB_HEAP is defined at run-time.
// If ARM_LIB_HEAP is defined, we can fix heap allocation.
extern MBED_WEAK uint32_t Image$$ARM_LIB_HEAP$$ZI$$Base[];
extern MBED_WEAK uint32_t Image$$ARM_LIB_HEAP$$ZI$$Length[];
extern MBED_WEAK uint32_t Image$$ARM_LIB_HEAP$$ZI$$Limit[];

// Heap here is considered starting after ZI ends to Stack start
Expand All @@ -942,7 +941,7 @@ extern "C" MBED_WEAK __value_in_regs struct __initial_stackheap _mbed_user_setup
struct __initial_stackheap r;

// Fix heap if ARM_LIB_HEAP is defined
if (Image$$ARM_LIB_HEAP$$ZI$$Length) {
if (Image$$ARM_LIB_HEAP$$ZI$$Base != Image$$ARM_LIB_HEAP$$ZI$$Limit) {
heap_base = (uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Base;
heap_limit = (uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Limit;
}
Expand All @@ -965,7 +964,7 @@ extern "C" __value_in_regs struct __argc_argv $Sub$$__rt_lib_init(unsigned heapb
uint32_t heap_limit = (uint32_t)Image$$ARM_LIB_STACK$$ZI$$Base;

// Fix heap if ARM_LIB_HEAP is defined
if (Image$$ARM_LIB_HEAP$$ZI$$Length) {
if (Image$$ARM_LIB_HEAP$$ZI$$Base != Image$$ARM_LIB_HEAP$$ZI$$Limit) {
heap_base = (uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Base;
heap_limit = (uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Limit;
}
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