On 2/24/24 10:16, Heinrich Schuchardt wrote:
On 2/16/24 11:35, Ilias Apalodimas wrote:
Hi Heinrich,
[...]
}
+ .rela.dyn : { *(.rela.dyn) }
+ .rela.plt : { *(.rela.plt) }
+ .rela.got : { *(.rela.got) }
+ .rela.data : { *(.rela.data) *(.rela.data*) }
Why are we switching from Rel to Rela?
This was wrong.
Looking at the u-boot ELF binary we see these relocation sections:
arm: .rel.dyn
arm64: .rela.dyn
riscv64: .rela.dyn
In our EFI object files we currently have no relocations. This is why
tests did not complain.
In arch/arm/lib/reloc_arm_efi.c we handle DT_REL.
In arch/arm/lib/reloc_aarch64_efi.c we handle DT_RELA.
In arch/riscv/lib/reloc_riscv_efi.c we handle DT_RELA.
To be truthful our generated binaries are only usable because we have no
relocations.
If we had relocations, copying these to the .text or .data section would
would not work. We would have to translate them to the relocation format
of PE files and put them into the .reloc section like EDK II does in
BaseTools/Source/C/GenFw/Elf32Convert.c.
Best regards
Heinrich
Best regards
Heinrich
_etext = .;
_text_size = . - _text;
- .dynamic : { *(.dynamic) }
+ . = ALIGN(4096);
.data : {
_data = .;
*(.sdata)
@@ -47,20 +59,19 @@ SECTIONS
. = ALIGN(512);
_bss_end = .;
_edata = .;
- }
- .rel.dyn : { *(.rel.dyn) }
- .rel.plt : { *(.rel.plt) }
- .rel.got : { *(.rel.got) }
- .rel.data : { *(.rel.data) *(.rel.data*) }
- _data_size = . - _etext;
+ } :data
+ _data_size = _edata - _data;
+ . = ALIGN(4096);
+ .dynsym : { *(.dynsym) }
+ . = ALIGN(4096);
+ .dynstr : { *(.dynstr) }
+ . = ALIGN(4096);
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
/DISCARD/ : {
*(.rel.reloc)
*(.eh_frame)
*(.note.GNU-stack)
- *(.dynsym)
- *(.dynstr)
- *(.note.gnu.build-id)
- *(.comment)
}
+ .comment 0 : { *(.comment) }
}
--
2.43.0
Cheers
/Ilias
