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Code Issues Releases Activity

irq_stack: correct one word overlap of _irq_stack_top

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The previous fix in r652 was _almost_ right.  There was
still a one word (4-byte) overlap between _irq_stack_top
and the start of the data segment.

_irq_stack_end + _irq_stack_size leaves the '.' pointer at
the word immediatly after the stack.  This commit corrects
this error and places _irq_stack_top on the last word
_inside_ the reserved space for the irq stack.

[Before]
  $ ./tools/arm-2009q3/bin/arm-none-eabi-nm -n ./build/openpilot/OpenPilot.elf
  ...
  20000000 A SRAM_BASE
  20000000 B _irq_stack_end
  20000400 d LED_GPIO_PORT   <--- overlap
  20000400 B _irq_stack_top  <--- overlap
  20000400 D _sdata
  20000408 d ADC_GPIO_PORT
  ...

[After]
  $ ./tools/arm-2009q3/bin/arm-none-eabi-nm -n ./build/openpilot/OpenPilot.elf
  ...
  20000000 A SRAM_BASE
  20000000 B _irq_stack_end
  200003fc B _irq_stack_top
  20000400 d LED_GPIO_PORT
  20000400 D _sdata
  20000408 d ADC_GPIO_PORT
  ...

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@668 ebee16cc-31ac-478f-84a7-5cbb03baadba
This commit is contained in:
stac 2010-05-27 01:37:40 +00:00 committed by stac
parent ac80771774
commit 918250868b
1 changed files with 2 additions and 1 deletions
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3
flight/PiOS/STM32F10x/link_stm32f10x_HD_NB.ld
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@ -275,7 +275,8 @@ SECTIONS
_irq_stack_end = . ;
. = . + _irq_stack_size ;
. = ALIGN(4);
_irq_stack_top = . ;
_irq_stack_top = . - 4 ;
. = ALIGN(4);
} >RAM