Lncvrt/grub
1
0 Fork 0
mirror of https://git.savannah.gnu.org/git/grub.git synced 2026-10-21 06:49:35 +00:00
Code Issues Packages Projects Releases Wiki Activity
11,288 Commits 28 Branches 23 Tags
a33754979725746d7d5b3809089e519006d0d4c3
Commit Graph
6 Commits
Author SHA1 Message Date
Xiaotian Wu 857af0e17b loongarch: Add ELF relocation types documentation and comments 
See https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc#relocations

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-06-13 16:00:39 +02:00
Xiaotian Wu 22a6f8a482 loongarch: Rename function names 
According to the relocation documentation, the following function names are
renamed to show their exact meaning:
  - from grub_loongarch64_xxx64_hi12() to grub_loongarch64_abs64_hi12(),
  - from grub_loongarch64_xxx64_hi12() to grub_loongarch64_abs64_lo20().

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-06-13 16:00:39 +02:00
Xiaotian Wu 985631c3d9 kern/{arm64,loongarch64}/dl_helper: Use the correct format specifier for formatted output 
Use PRIxGRUB_INT64_T format specifier for grub_int64_t type
and drop redundant casts.

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-06-13 16:00:39 +02:00
WANG Xuerui 1c0df7c142 kern/loongarch64/dl_helper: Avoid undefined behavior when popping from an empty reloc stack 
The return value of grub_loongarch64_stack_pop() is unsigned, so -1 should
not be used in the first place. Replacing with 0 is enough to avoid the
UB in this edge case.

Technically though, proper error handling is needed throughout the
management of the reloc stack, so no unexpected behavior will happen
even in case of malformed object code input (right now, pushes become
no-ops when the stack is full, and garbage results if the stack does not
contain enough operands for an op). The refactor would touch some more
places so would be best done in a separate series.

Fixes: CID 407777
Fixes: CID 407778

Signed-off-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-05-25 16:47:59 +02:00
Xiaotian Wu 0b4693e32c loongarch: Add support for ELF psABI v2.00 relocations 
A new set of relocation types was added in the LoongArch ELF psABI v2.00
spec [1], [2] to replace the stack-based scheme in v1.00. Toolchain
support is available from binutils 2.40 and gcc 13 onwards.

This patch adds support for the new relocation types, that are simpler
to handle (in particular, stack operations are gone). Support for the
v1.00 relocs are kept for now, for compatibility with older toolchains.

[1] https://github.com/loongson/LoongArch-Documentation/pull/57
[2] https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_appendix_revision_history

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-05-17 13:18:36 +02:00
Xiaotian Wu b264f098be loongarch: Add support for ELF psABI v1.00 relocations 
This patch adds support of the stack-based LoongArch relocations
throughout GRUB, including tools, dynamic linkage, and support for
conversion of ELF relocations into PE ones. A stack machine is required
to handle these per the spec [1] (see the R_LARCH_SOP types), of which
a simple implementation is included.

These relocations are produced by binutils 2.38 and 2.39, while the newer
v2.00 relocs require more recent toolchain (binutils 2.40+ & gcc 13+, or
LLVM 16+). GCC 13 has not been officially released as of early 2023, so
support for v1.00 relocs are expected to stay relevant for a while.

[1] https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_relocations

Signed-off-by: Zhou Yang <zhouyang@loongson.cn>
Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
 2023-05-17 12:59:08 +02:00