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| author | Sergey Bugaev <bugaevc@gmail.com> | 2023-03-19 18:09:54 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-04-03 01:02:44 +0200 |
| commit | af2942cc622809650b3158fe61d73a0de952a10a (patch) | |
| tree | b2439eae3693f279ee90932e963d4247ddd6962a | |
| parent | 589bcfdeefeba493fd0f90fbdcbd285ec1ed313d (diff) | |
| download | glibc-af2942cc622809650b3158fe61d73a0de952a10a.tar glibc-af2942cc622809650b3158fe61d73a0de952a10a.tar.gz glibc-af2942cc622809650b3158fe61d73a0de952a10a.tar.bz2 glibc-af2942cc622809650b3158fe61d73a0de952a10a.zip | |
mach, hurd: Drop __libc_lock_self0
This was used for the value of libc-lock's owner when TLS is not yet set
up, so THREAD_SELF can not be used. Since the value need not be anything
specific -- it just has to be non-NULL -- we can just use a plain
constant, such as (void *) 1, for this. This avoids accessing the symbol
through GOT, and exporting it from libc.so in the first place.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230319151017.531737-12-bugaevc@gmail.com>
| -rw-r--r-- | sysdeps/mach/hurd/Versions | 4 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/cthreads.c | 4 | ||||
| -rw-r--r-- | sysdeps/mach/libc-lock.h | 3 |
3 files changed, 3 insertions, 8 deletions
diff --git a/sysdeps/mach/hurd/Versions b/sysdeps/mach/hurd/Versions index bf2e870a2a..20ac0067c7 100644 --- a/sysdeps/mach/hurd/Versions +++ b/sysdeps/mach/hurd/Versions @@ -20,7 +20,7 @@ libc { __open_nocancel; __read_nocancel; __pread64_nocancel; __write_nocancel; - __libc_lock_self0; __getcwd; + __getcwd; __stat64; _dl_init_first; @@ -61,7 +61,7 @@ ld { __open_nocancel; __read_nocancel; __pread64_nocancel; __write_nocancel; - __libc_lock_self0; __getcwd; + __getcwd; __stat64; __fstat64; } } diff --git a/sysdeps/mach/hurd/cthreads.c b/sysdeps/mach/hurd/cthreads.c index 9f17cfe489..87b6c06b67 100644 --- a/sysdeps/mach/hurd/cthreads.c +++ b/sysdeps/mach/hurd/cthreads.c @@ -20,10 +20,6 @@ #include <stdlib.h> #include <pthreadP.h> -/* This serves as stub "self" pointer for libc locks when TLS is not initialized - yet. */ -char __libc_lock_self0[0]; - /* Placeholder for key creation routine from Hurd cthreads library. */ int weak_function diff --git a/sysdeps/mach/libc-lock.h b/sysdeps/mach/libc-lock.h index 14248a0538..c5c2553c7b 100644 --- a/sysdeps/mach/libc-lock.h +++ b/sysdeps/mach/libc-lock.h @@ -34,9 +34,8 @@ typedef struct typedef __libc_lock_recursive_t __rtld_lock_recursive_t; -extern char __libc_lock_self0[0]; #define __libc_lock_owner_self() \ - (__LIBC_NO_TLS () ? (void *)&__libc_lock_self0 : THREAD_SELF) + (__LIBC_NO_TLS () ? (void *) 1 : THREAD_SELF) #else typedef struct __libc_lock_opaque__ __libc_lock_t; |