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| author | Mikhail Maltsev <mikhail.maltsev@arm.com> | 2023-04-28 18:30:49 +0100 |
|---|---|---|
| committer | Mikhail Maltsev <mikhail.maltsev@arm.com> | 2023-04-28 18:30:49 +0100 |
| commit | 024bb62ffd072e9a90343e88c92e40b5849c2632 (patch) | |
| tree | c468c7de5918c692b389aa193c363907c58b1137 /llvm/lib/Transforms/Utils/BasicBlockUtils.cpp | |
| parent | 15f0491d3963d91202aef659acc20f59aa83fae7 (diff) | |
| download | llvm-024bb62ffd072e9a90343e88c92e40b5849c2632.zip llvm-024bb62ffd072e9a90343e88c92e40b5849c2632.tar.gz llvm-024bb62ffd072e9a90343e88c92e40b5849c2632.tar.bz2 | |
[Driver] Pass --target2= to linker from baremetal toolchain
According to the GNU ld manual
https://sourceware.org/binutils/docs/ld/ARM.html#ARM the R_ARM_TARGET2
relocation (used in exception handling tables) is treated differently
depending on the target. By default, LLD treats R_ARM_TARGET2 as
R_ARM_GOT_PREL (--target2=got-rel), which is correct for Linux but not
for embedded targets.
This patch adds --target2=rel to linker options in the baremetal
toolchain driver so that on baremetal targets, R_ARM_TARGET2 is
treated as R_ARM_REL32. Such behavior is compatible with GNU ld and
unwinding libraries (e.g., libuwind).
Reviewed By: peter.smith, phosek
Differential Revision: https://reviews.llvm.org/D149458
Diffstat (limited to 'llvm/lib/Transforms/Utils/BasicBlockUtils.cpp')
0 files changed, 0 insertions, 0 deletions