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| author | Fangrui Song <maskray@google.com> | 2022-05-27 12:34:49 -0700 |
|---|---|---|
| committer | Fangrui Song <maskray@google.com> | 2022-05-27 12:34:49 -0700 |
| commit | efa7936e4c91b1c260d03614bb26858fbb8a0204 (patch) | |
| tree | 185200d244eb184a647b7b76d2cc7465d15f2f41 /elf/nextmod3.map | |
| parent | f8587a61892cbafd98ce599131bf4f103466f084 (diff) | |
| download | glibc-efa7936e4c91b1c260d03614bb26858fbb8a0204.zip glibc-efa7936e4c91b1c260d03614bb26858fbb8a0204.tar.gz glibc-efa7936e4c91b1c260d03614bb26858fbb8a0204.tar.bz2 | |
dlsym: Make RTLD_NEXT prefer default version definition [BZ #14932]
When the first object providing foo defines both foo@v1 and foo@@v2,
dlsym(RTLD_NEXT, "foo") returns foo@v1 while dlsym(RTLD_DEFAULT, "foo")
returns foo@@v2. The issue is that RTLD_DEFAULT uses the
DL_LOOKUP_RETURN_NEWEST flag while RTLD_NEXT doesn't. Fix the RTLD_NEXT
branch to use DL_LOOKUP_RETURN_NEWEST.
Note: the new behavior matches FreeBSD rtld. Future sanitizers will not
need to add versioned interceptors like https://reviews.llvm.org/D96348
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'elf/nextmod3.map')
| -rw-r--r-- | elf/nextmod3.map | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/elf/nextmod3.map b/elf/nextmod3.map new file mode 100644 index 0000000..eb0e7d7 --- /dev/null +++ b/elf/nextmod3.map @@ -0,0 +1,3 @@ +v1 { }; +v2 { } v1; +v3 { foo; } v2; |