| Commit message (Collapse) | Author | Age | Files | Lines |
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Some linkers verify that sections have a start address that is aligned
with the minimum alignment of that section. Add extra padding to the
".text" section to ensure it is always aligned with the maximum
alignment of any section placed in ".text".
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reported by: Ed Maste <emaste@FreeBSD.org>
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I've been successfully using SeaBIOS as secondary bootloader. In more details
I have GRUB2-as-payload in flash together with coreboot. SeaBIOS binary is on
the HDD and loaded by GRUB when needed. This has an unfortunate consequence
that I have to keep vga oprom in flash even if usually I boot without it. This
patches makes bios.bin.elf multiboot executable with files passed as modules.
Example:
menuentry "SeaBIOS (mb)" --unrestricted {
root=ahci0,2
multiboot /bios.bin.elf
module /vgabios_x230.rom name=pci8086,0166.rom
}
the parameter name= specifies under which name SeaBIOS will see it.
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Add support for a FUNCFSEG macro that will force a "32bit flat" C
function to be located in the f-segment. This is useful for 32bit
code with inline assembler that thunks to 16bit mode.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Update the layoutrom.py build script so that fixed address sections
can come from the 32bit compiled C code. Update the C code so that
all VAR16FIXED variables instead use the new VARFSEGFIXED which is
defined in 32bit mode.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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A number of fields were exported from the layout info that weren't
used. Don't bother exporting them.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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The 'category' really determines the memory location while the
'fileid' determines which link stage the section is in. So, use
'fileid' when writing the linker scripts.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Push findInit() into main() and unify the category setting code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Set an appropriate elf entry point (entry_elf, entry_csm,
reset_vector) for each type of build (coreboot, csm, qemu). Use that
entry point when determining which sections to keep.
Also, remove the '.export.' mechanism to keep a section in the final
binary - it is no longer used.
This allows the build to slightly reduce the overall size as entry_elf
is no longer needed on non-coreboot builds and entry_csm is no longer
needed on non-csm builds.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Eliminate the per-section 'keep' variable - the list of sections that
will be emitted is sufficient to track that state.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Extract out the logic that visits all reachable sections into new
function findReachable().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Johannes Krampf <johannes.krampf@googlemail.com>
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Signed-off-by: Johannes Krampf <johannes.krampf@googlemail.com>
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Signed-off-by: Johannes Krampf <johannes.krampf@googlemail.com>
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Signed-off-by: Johannes Krampf <johannes.krampf@googlemail.com>
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The current code does not boot on QEMU with 256K roms when code
relocation is disabled, because QEMU only maps the last 128K of the
rom to low memory. The seabios make_bios_writable() call copies the
full rom to low memory.
This patch separates out the init sections even if code relocations
are disabled. This effectively ensures that make_bios_writable() code
is in the last 128K of the rom.
This also introduces a new build symbol (final_readonly_start) which
stores the address of where the final runtime read-only memory begins.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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It's common for other projects (eg, QEMU, Linux) to put build scripts
into a "scripts/" directory. There's no reason for SeaBIOS to be
different, so rename the "tools/" directory to "scripts/".
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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