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authorFlorian Weimer <fweimer@redhat.com>2016-11-30 15:59:57 +0100
committerFlorian Weimer <fweimer@redhat.com>2016-11-30 15:59:57 +0100
commit9e78f6f6e7134a5f299cc8de77370218f8019237 (patch)
tree04aa339daf9901b8fc1851353c697528659e7afe /sysdeps/unix/sysv/linux/arm
parent705a79f82560ff6472cebed86aa5db04cdea3bce (diff)
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Implement _dl_catch_error, _dl_signal_error in libc.so [BZ #16628]
This change moves the main implementation of _dl_catch_error,
_dl_signal_error to libc.so, where TLS variables can be used
directly.  This removes a writable function pointer from the
rtld_global variable.

For use during initial relocation, minimal implementations of these
functions are provided in ld.so.  These are eventually interposed
by the libc.so implementations.  This is implemented by compiling
elf/dl-error-skeleton.c twice, via elf/dl-error.c and
elf/dl-error-minimal.c.

As a side effect of this change, the static version of dl-error.c
no longer includes support for the
_dl_signal_cerror/_dl_receive_error mechanism because it is only
used in ld.so.
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm')
-rw-r--r--sysdeps/unix/sysv/linux/arm/localplt.data3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/localplt.data b/sysdeps/unix/sysv/linux/arm/localplt.data
index 4301703553..a5ccd7fa58 100644
--- a/sysdeps/unix/sysv/linux/arm/localplt.data
+++ b/sysdeps/unix/sysv/linux/arm/localplt.data
@@ -16,3 +16,6 @@ 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