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Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Part of the barebox code and variables are put in separate sections
(.barebox* and .initcall*). When this code is compiled as position
independent code then the compiler creates corresponding .rela.barebox* and
.rela.initcall* sections with the relocation table entries.
These sections don't match the .rela.data* wildcard in the linker script.
As a result, they are not added to the .rela section during linking but are
added individually after it instead. And when the EFI binary is created
from the ELF binary, these sections are not copied.
This has two side effects:
1. The corresponding relocations are not handled by the generic relocation
code. 'fixup_tables()' was added to do these relocations manually.
2. In the DYNAMIC section, the RELASZ entry contains the total size of
relocations in bytes. This includes the .rela.barebox* and .rela.initcall*
sections. This value is not modified when the EFI binary is created. So the
value is too large.
The generic relocation code in _relocate() used this value when iterating
over all relocation entries. With the wrong RELASZ value it iterates beyond
the end of the .rela section into uninitialized memory. After power-on this
memory is zero and the relocation code interprets this as 'nothing to do',
so there is no visible effect. After a soft reset, random data in that area
may produce a seemingly valid relocation entry, a random address is
modified and barebox crashes.
This patch adds the .rela.barebox* and .rela.initcall* sections to the
normal .rela section. The RELASZ now contains the correct size and the
generic relocation code works correctly. 'fixup_tables()' must be removed
at the same time to avoid relocating these entries twice.
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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exitcall infrastructure is based on initcall infrastructure.
It allows to have and use exit call hooks on barebox shutdown.
Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Currently, MIPS is the only architecture that needs
include/generated/asm-offsets.h, but we have got ./Kbuild file now.
It is a good reason to move asm-offsets.h rule from arch/mips/Makefile
to ./Kbuild and add dummy asm-offsets.c for the other architectures.
asm-offsets.h would be useful for all the architectures.
This commit does not implement include/generated/bounds.h,
but if necessary, it is easy to implement it.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This adds support for running barebox in an EFI environment
on X86 PC hardware.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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