diff options
| author | YunQiang Su <wzssyqa@gmail.com> | 2024-01-17 12:11:50 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-01-16 23:11:50 -0500 |
| commit | 0a64367a72f1634321f5051221f05f2f364bd882 (patch) | |
| tree | 9aa17384aa5de6cd8171ecd944a1427b41358bd1 /lldb/source/Commands/CommandObjectSource.cpp | |
| parent | 8371cdca12b1510d9ac6a1d13d573ced6c05402f (diff) | |
| download | llvm-0a64367a72f1634321f5051221f05f2f364bd882.zip llvm-0a64367a72f1634321f5051221f05f2f364bd882.tar.gz llvm-0a64367a72f1634321f5051221f05f2f364bd882.tar.bz2 | |
Sanitizer/MIPS: Use $t9 for preemptible function call (#76894)
Currently, almost all of the shared libraries of MIPS, rely on $t9
to get the address of current function, instead of PCREL instructions,
even on MIPSr6. So we have to set $t9 properly.
To get the address of preemptible function, we need the help of GOT.
MIPS/O32 has .cpload, which can help to generate 3 instructions to get GOT.
For __mips64, we can get GOT by:
lui $t8, %hi(%neg(%gp_rel(SANITIZER_STRINGIFY(TRAMPOLINE(func)))))
daddu $t8, $t8, $t9
daddiu $t8, $t8, %hi(%neg(%gp_rel(SANITIZER_STRINGIFY(TRAMPOLINE(func)))))
And then get the address of __interceptor_func, and jump to it
ld $t9, %got_disp(_interceptor" SANITIZER_STRINGIFY(func) ")($t8)
jr $t9
Fixes #74047
Co-authored-by: YunQiang Su <yunqiang.su@cipunited.com>
Diffstat (limited to 'lldb/source/Commands/CommandObjectSource.cpp')
0 files changed, 0 insertions, 0 deletions