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author | Florian Weimer <fweimer@redhat.com> | 2020-02-08 19:58:43 +0100 |
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committer | Florian Weimer <fweimer@redhat.com> | 2020-02-15 11:01:23 +0100 |
commit | 3a0ecccb599a6b1ad4b149dc569c0080e92d057b (patch) | |
tree | e1c4c0e5f2e80221054d6bb6260b4038e27567b4 /sysdeps/unix/sysv/linux/microblaze | |
parent | 2efa52c880d46ee89523c8ed8102ceeb02043926 (diff) | |
download | glibc-3a0ecccb599a6b1ad4b149dc569c0080e92d057b.tar.gz glibc-3a0ecccb599a6b1ad4b149dc569c0080e92d057b.tar.xz glibc-3a0ecccb599a6b1ad4b149dc569c0080e92d057b.zip |
ld.so: Do not export free/calloc/malloc/realloc functions [BZ #25486]
Exporting functions and relying on symbol interposition from libc.so makes the choice of implementation dependent on DT_NEEDED order, which is not what some compiler drivers expect. This commit replaces one magic mechanism (symbol interposition) with another one (preprocessor-/compiler-based redirection). This makes the hand-over from the minimal malloc to the full malloc more explicit. Removing the ABI symbols is backwards-compatible because libc.so is always in scope, and the dynamic loader will find the malloc-related symbols there since commit f0b2132b35248c1f4a80f62a2c38cddcc802aa8c ("ld.so: Support moving versioned symbols between sonames [BZ #24741]"). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/microblaze')
-rw-r--r-- | sysdeps/unix/sysv/linux/microblaze/ld.abilist | 4 | ||||
-rw-r--r-- | sysdeps/unix/sysv/linux/microblaze/localplt.data | 6 |
2 files changed, 0 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/microblaze/ld.abilist b/sysdeps/unix/sysv/linux/microblaze/ld.abilist index aa0d71150a..a4933c3541 100644 --- a/sysdeps/unix/sysv/linux/microblaze/ld.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/ld.abilist @@ -3,7 +3,3 @@ GLIBC_2.18 __stack_chk_guard D 0x4 GLIBC_2.18 __tls_get_addr F GLIBC_2.18 _dl_mcount F GLIBC_2.18 _r_debug D 0x14 -GLIBC_2.18 calloc F -GLIBC_2.18 free F -GLIBC_2.18 malloc F -GLIBC_2.18 realloc F diff --git a/sysdeps/unix/sysv/linux/microblaze/localplt.data b/sysdeps/unix/sysv/linux/microblaze/localplt.data index 8ca23897df..0e98d5251e 100644 --- a/sysdeps/unix/sysv/linux/microblaze/localplt.data +++ b/sysdeps/unix/sysv/linux/microblaze/localplt.data @@ -7,12 +7,6 @@ libc.so: realloc libm.so: matherr # The dynamic loader needs __tls_get_addr for TLS. ld.so: __tls_get_addr ? -# The main malloc is interposed into the dynamic linker, for -# allocations after the initial link (when dlopen is used). -ld.so: malloc -ld.so: calloc -ld.so: realloc -ld.so: free # The TLS-enabled version of these functions is interposed from libc.so. ld.so: _dl_signal_error ld.so: _dl_catch_error |