u-boot.git/tools/relocate-rela.c, branch master

tools: relocate-rela: Add M68K support

2023-09-06T11:28:29+00:00

Add M68K ELF32 support into this tool, so it can patch static rela
into M68K u-boot-nodtb.bin . This is the first step toward M68K
relocation support, and in turn, removal of NEEDS_MANUAL_RELOC
from the codebase altogether.

Tested-by: Michal Simek  # microblaze, arm64
Signed-off-by: Marek Vasut

tools: relocate-rela: Fix BE symtab handling

2023-09-06T11:28:19+00:00

The symtab contains data in target endianness, convert the data to
native endianness before doing any operations and on them, and back
to target endianness before updating the bin file.

Signed-off-by: Marek Vasut 
Tested-by: Michal Simek  # microblaze, arm64
Reviewed-by: Angelo Dureghello

tools: relocate-rela: Fix typo

2023-06-12T11:24:31+00:00

Position is written with one s, fix typo.

Signed-off-by: Marek Vasut 
Link: https://lore.kernel.org/r/20230530225319.949968-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Michal Simek

tools: relocate-rela: add support for handling 32-bit big endian files

2023-03-13T10:46:17+00:00

Currently, a microblaze build with CONFIG_SYS_BIG_ENDIAN=y and
CONFIG_STATIC_RELA=y fails with:
tools/relocate-rela: Not supported machine type
ELF decoding failed
make[2]: *** [u-boot/Makefile:1306: u-boot-nodtb.bin] Error 1

To fix this, convert the 32-bit codepath to use the previously added
elf{16,32}_to_cpu() functions. The aarch64 codepath is left untouched.

This commit ensures that CI doesn't fail for the next patches which enable
runtime relocation by default for microblaze.

Reviewed-by: Michal Simek 
Signed-off-by: Ovidiu Panait 
Link: https://lore.kernel.org/r/20230311173838.521804-3-ovpanait@gmail.com
Signed-off-by: Michal Simek

tools: relocate-rela: introduce elf16_to_cpu() and elf32_to_cpu()

2023-03-13T10:46:17+00:00

Add elf16_to_cpu() and elf32_to_cpu() functions that allow to read data in
both big-endian and little-endian formats.

Reviewed-by: Michal Simek 
Signed-off-by: Ovidiu Panait 
Link: https://lore.kernel.org/r/20230311173838.521804-2-ovpanait@gmail.com
Signed-off-by: Michal Simek

tools: relocate-rela: adjust le64_to_cpu -> le32_to_cpu in decode_elf32()

2023-03-13T10:46:17+00:00

The sh_addr/sh_offset/sh_size fields in Elf32_Shdr are 32-bits wide, so
use le32_to_cpu() instead of the 64-bit variant.

Fixes: 5e0e1a86d327 ("tools: relocate-rela: Fix ELF decoding on big-endian hosts")
Reviewed-by: Michal Simek 
Signed-off-by: Ovidiu Panait 
Link: https://lore.kernel.org/r/20230311173838.521804-1-ovpanait@gmail.com
Signed-off-by: Michal Simek

tools: relocate-rela: Define all macros for e_machine and reloc types

2022-07-26T06:23:55+00:00

With some old toolchain not all values should be available that's why
better to define all of them to avoid compilation issues.

Signed-off-by: Michal Simek 
Link: https://lore.kernel.org/r/e2a66854c5506100eb82b5b33cec7f0b5fca1008.1657260903.git.michal.simek@amd.com

tools: relocate-rela: Remove guard around R_AARCH64_RELATIVE

2022-07-26T06:23:55+00:00

In code you can find out this fragment:
 19 #ifndef R_AARCH64_RELATIVE
 20 #define R_AARCH64_RELATIVE      1027
 21 #endif

which means that R_AARCH64_RELATIVE is defined all the time that's why
ifdef is not needed.

Signed-off-by: Michal Simek 
Link: https://lore.kernel.org/r/0d40a09ab6edcd88ba3059f7a0b63a819b71256a.1657260903.git.michal.simek@amd.com

tools: relocate-rela: Fix ELF decoding on big-endian hosts

2022-07-26T06:23:54+00:00

The new ELF decoding logic assumed that the target binary has the same
endianness as the host, which broke building ARM64 firmware binaries on
big-endian machines.

This commit fixes the ELF64 decoding to be host-endianness-neutral, and
applies the same changes to the ELF32 decoding. It does not fix the
microblaze-specific dynamic symbol decoding.

It also corrects the functions used for byte swapping in rela_elf64()
and rela_elf32(). The result is the same, but semantically the code is
converting bytes read from a foreign-endianness file to host byte order.

Fixes: 4c9e2d643460 ("tools: relocate-rela: Read rela start/end directly from ELF")
Fixes: a1405d9cfedb ("tools: relocate-rela: Check that relocation works only for EM_AARCH64")
Signed-off-by: Samuel Holland 
Link: https://lore.kernel.org/r/20220715064026.54551-1-samuel@sholland.org
Signed-off-by: Michal Simek

tools: relocate-rela: Add support for 32bit Microblaze relocation

2022-06-24T12:15:00+00:00

Microblaze is 32bit that's why it is using elf32 format. Relocation code
requires to get information about rela and dynsym senctions and also text
base which was used for compilation.
Code build with -fPIC and linked with -pic generates 4 relocation types.
R_MICROBLAZE_NONE is the easiest one which doesn't require any action.
R_MICROBLAZE_REL only requires write addend to r_offset address.
R_MICROBLAZE_32/R_MICROBLAZE_GLOB_DAT are the most complicated. There is a
need to find out symbol value with adding symbol value and write it to
address pointed by r_offset. Calculation with addend is also added but
only 0 addend values are generated now.

Signed-off-by: Michal Simek 
Link: https://lore.kernel.org/r/9912c3d76933bdf75e1ebb6aab43726cd32cafb5.1655299267.git.michal.simek@amd.com