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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 /elf/Versions
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 'elf/Versions')
-rw-r--r--elf/Versions6
1 files changed, 6 insertions, 0 deletions
diff --git a/elf/Versions b/elf/Versions
index 23deda984f..05e5449f4d 100644
--- a/elf/Versions
+++ b/elf/Versions
@@ -26,6 +26,9 @@ libc {
_dl_open_hook;
_dl_sym; _dl_vsym;
__libc_dlclose; __libc_dlopen_mode; __libc_dlsym;
+
+ # Internal error handling support. Interposes the functions in ld.so.
+ _dl_signal_error; _dl_catch_error;
}
}
@@ -64,5 +67,8 @@ ld {
# Pointer protection.
__pointer_chk_guard;
+
+ # Internal error handling support. Interposed by libc.so.
+ _dl_signal_error; _dl_catch_error;
}
}