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PR31177: Let region text start at __TEXT_REGION_ORIGIN___

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The start of MEMORY region text currently starts hard-coded at 0.

The linker can produce more exact diagnostics when it knows the exact placements of the memory regions.

For some old devices, program memory starts at 0x8000, so allow to specify program memory start at __TEXT_REGION_ORIGIN__ similar to how the data region is described.

If ok, please apply to master.
This one is also fine to back-port.

Johann

--

AVR: Use __TEXT_REGION_ORIGIN__ as start for MEMORY region text.

ld/
	PR 31177
	* scripttempl/avr.sc (__TEXT_REGION_ORIGIN__): New symbol.
	(MEMORY): Use as start address for the text region.
This commit is contained in:
Georg-Johann Lay
2023-12-17 19:20:54 +01:00
committed by Nick Clifton
parent c4fb39bb31
commit d51cd0f64c
1 changed files with 2 additions and 1 deletions
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3
ld/scripttempl/avr.sc
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@@ -92,6 +92,7 @@ OUTPUT_ARCH(${ARCH})
EOF
test -n "${RELOCATING}" && cat <<EOF
__TEXT_REGION_ORIGIN__ = DEFINED(__TEXT_REGION_ORIGIN__) ? __TEXT_REGION_ORIGIN__ : 0;
__TEXT_REGION_LENGTH__ = DEFINED(__TEXT_REGION_LENGTH__) ? __TEXT_REGION_LENGTH__ : $TEXT_LENGTH;
__DATA_REGION_ORIGIN__ = DEFINED(__DATA_REGION_ORIGIN__) ? __DATA_REGION_ORIGIN__ : $DATA_ORIGIN;
__DATA_REGION_LENGTH__ = DEFINED(__DATA_REGION_LENGTH__) ? __DATA_REGION_LENGTH__ : $DATA_LENGTH;
@@ -108,7 +109,7 @@ ${HAVE_FLMAP+__RODATA_REGION_LENGTH__ = DEFINED(__RODATA_REGION_LENGTH__) ? __RO
${HAVE_FLMAP+__RODATA_ORIGIN__ = __RODATA_VMA__ + __RODATA_LDS_OFFSET__;}
MEMORY
{
text (rx) : ORIGIN = 0, LENGTH = __TEXT_REGION_LENGTH__
text (rx) : ORIGIN = __TEXT_REGION_ORIGIN__, LENGTH = __TEXT_REGION_LENGTH__
data (rw!x) : ORIGIN = __DATA_REGION_ORIGIN__, LENGTH = __DATA_REGION_LENGTH__
${EEPROM_LENGTH+ eeprom (rw!x) : ORIGIN = 0x810000, LENGTH = __EEPROM_REGION_LENGTH__}
$FUSE_NAME (rw!x) : ORIGIN = 0x820000, LENGTH = __FUSE_REGION_LENGTH__