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Add a check that the data area does not overrun the stack.

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* msp430/msp430-sim.ld (.stack): Add an assertion to make sure
	that the data area does not overrun the stack.  PROVIDE a new
	symbol __stack_size to allow the user to set the limit.
	* msp430/msp430xl-sim.ld (.stack): Likewise.
	* rl78/rl78-sim.ld (.stack): Likewise.
	* rl78/rl78.ld (.stack): Likewise.
	* rx/rx-sim.ld (.stack): Likewise.
	* rx/rx.ld (.stack): Likewise.
This commit is contained in:
Nick Clifton
2015-05-18 14:14:28 +01:00
parent d958183ba4
commit 068f669e49
7 changed files with 110 additions and 3 deletions
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16
libgloss/msp430/msp430-sim.ld
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@ -175,10 +175,26 @@ SECTIONS
_end = .;
PROVIDE (end = .);
/* The __stack_size value of 0x100 is just a guess, but since it is
PROVIDEd the user can override it on the command line. It has to be
set here, rather than inside the .stack section, as symbols defined
inside sections are only evaluated during the final phase of the link,
long after the ASSERT is checked. An ASSERT referencing a PROVIDED but
not yet evaluated symbol will automatically fail.
FIXME: It would be nice if this value could be automatically set via
gcc's -fstack-usage command line option somehow. */
PROVIDE (__stack_size = 0x100);
.stack (ORIGIN (RAM) + LENGTH(RAM)) :
{
PROVIDE (__stack = .);
*(.stack)
/* Linker section checking ignores empty sections like
this one so we have to have our own test here. */
ASSERT ((__stack > (_end + __stack_size)),
"Error: Too much data - no room left for the stack");
}
/* Make sure that .upper sections are not used without -mlarge support. */

18
libgloss/msp430/msp430xl-sim.ld
View File

@ -61,7 +61,7 @@ SECTIONS
The same reasoning applies to the absence of definitions for the
.either.text, .either.data and .either.bss sections as well. */
. = ALIGN(2);
*(.rodata .rodata.* .gnu.linkonce.r.* .const .const:*)
*(.rodata1)
@ -318,6 +318,17 @@ SECTIONS
LONG(0);
} > HIFRAM
/* The __stack_size value of 0x100 is just a guess, but since it is
PROVIDEd the user can override it on the command line. It has to be
set here, rather than inside the .stack section, as symbols defined
inside sections are only evaluated during the final phase of the link,
long after the ASSERT is checked. An ASSERT referencing a PROVIDED but
not yet evaluated symbol will automatically fail.
FIXME: It would be nice if this value could be automatically set via
gcc's -fstack-usage command line option somehow. */
PROVIDE (__stack_size = 0x100);
/* Note: We place the stack in HIFRAM because then there is less
chance that it will collide with allocated data in the RAM region.
In scripts targeted at real MCUs however it may be better to place
@ -329,6 +340,11 @@ SECTIONS
.stack (ORIGIN (HIFRAM) + LENGTH (HIFRAM)) :
{
PROVIDE (__stack = .);
/* Linker section checking ignores empty sections like
this one so we have to have our own test here. */
ASSERT ((__stack > (_end + __stack_size)),
"Error: Too much data - no room left for the stack");
}
.text :