Cleanup and preparation commit for linker script generator.
Zephyr linker scripts provides start and end symbols for each section,
and sometimes even size and LMA start symbols.
Generally, start and end symbols uses the following pattern, as:
Section name: foo
Section start symbol: __foo_start
Section end symbol: __foo_end
However, this pattern is not followed consistently.
To allow for linker script generation and ensure consistent naming of
symbols then the following pattern is introduced consistently to allow
for cleaner linker script generation.
Section name: foo
Section start symbol: __foo_start
Section end symbol: __foo_end
Section size symbol: __foo_size
Section LMA start symbol: __foo_load_start
This commit aligns the symbols for _data_ram/rom to other symbols and in
such a way they follow consistent pattern which allows for linker script
and scatter file generation.
The symbols are named according to the section name they describe.
Section name is `data`
A new group named data_region is introduced which instead spans all the
input and output sections that was previously covered by
__data_ram_start, __data_ram_end, and __data_rom_start.
The following symbols are aligned in this commit:
- __data_ram_start -> __data_region_start
- __data_ram_end -> __data_region_end
- __data_rom_start -> __data_region_load_start
The following new symbols are introduced so that the data section is
aligned with other sections:
- __data_end
- __data_start
value identical to __data_region_start but describes start of
the section.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Commit 6b3c5e8bb2 removed the use of
_DATA_IN_ROM but kept the now unused define.
This commit removes the corresponding define which is no longer used.
Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
Move the IDT_LIST memory region to the location recommended by
`intlist.ld`. The documentation specifies that this region should not
overlap other regions, and there is no guarantee that the area after the
`SRAM` region is not used. The end of the address space is much less
likely to be a valid RAM address.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Current location options for linker source files includes init and
noinit ram data, but only a noinit ram section. This makes it impossible
for application code to define an initialized RAM output section,
such as with the Z_ITERABLE_SECTION_RAM() helpers.
Adding a DATA_SECTIONS linker source option for this use case.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Due to the use of gperf to generate hash table for kobjects,
the addresses of these kobjects cannot change during the last
few phases of linking (especially between zephyr_prebuilt.elf
and zephyr.elf). Because of this, the gperf generated data
needs to be placed at the end of memory to avoid pushing symbols
around in memory. This prevents moving these generated blocks
to earlier sections, for example, pinned data section needed
for demand paging. So create placeholders for use in
intermediate linking to reserve space for these generated blocks.
Due to uncertainty on the size of these blocks, more space is
being reserved which could result in wasted space. Though, this
retains the use of hash table for faster lookup.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
When MPU is enabled, the sections need to be 64 bytes aligned.
In the case of MMU, BSS section will be 4k aligned, because the first
variable in BSS section 'base_xlat_table' is explicitly aligned by
'__aligned(NUM_BASE_LEVEL_ENTRIES * sizeof(uint64_t))'.
However, with MPU, we do not have such a variable. So it's necessary
to fix the alignment of the BSS section in the linker.ld
Signed-off-by: Jaxson Han <jaxson.han@arm.com>
Split ARM and ARM64 architectures.
Details:
- CONFIG_ARM64 is decoupled from CONFIG_ARM (not a subset anymore)
- Arch and include AArch64 files are in a dedicated directory
(arch/arm64 and include/arch/arm64)
- AArch64 boards and SoC are moved to soc/arm64 and boards/arm64
- AArch64-specific DTS files are moved to dts/arm64
- The A72 support for the bcm_vk/viper board is moved in the
boards/bcm_vk/viper directory
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
2021-03-31 10:34:33 -05:00
Renamed from include/arch/arm/aarch64/scripts/linker.ld (Browse further)
