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Mark internal unistd functions with attribute_hidden [BZ #18822]
Mark internal unistd functions with attribute_hidden to allow direct access to them within libc.so and libc.a without using GOT nor PLT. [BZ #18822] * include/unistd.h (__access): Add attribute_hidden. (__lseek64): Likewise. (__libc_pread64): Likewise. (__pipe2): Likewise. (__sleep): Likewise. (__chdir): Likewise. (__fchdir): Likewise. (__getcwd): Likewise. (__rmdir): Likewise. (__execvpe): Likewise. (__execve): Likewise. (__setsid): Likewise. (__getuid): Likewise. (__geteuid): Likewise. (__getgid): Likewise. (__getegid): Likewise. (__getgroups): Likewise. (__group_member): Likewise. (__ttyname_r): Likewise. (__isatty): Likewise. (__readlink): Likewise. (__unlink): Likewise. (__gethostname): Likewise. (__profil): Likewise. (__getdtablesize): Likewise. (__brk): Likewise. (__ftruncate): Likewise. (__ftruncate64): Likewise.
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H.J. Lu
parent
8345a76018
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7ec4b39ac4
32
ChangeLog
32
ChangeLog
@ -1,3 +1,35 @@
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2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
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[BZ #18822]
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* include/unistd.h (__access): Add attribute_hidden.
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(__lseek64): Likewise.
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(__libc_pread64): Likewise.
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(__pipe2): Likewise.
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(__sleep): Likewise.
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(__chdir): Likewise.
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(__fchdir): Likewise.
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(__getcwd): Likewise.
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(__rmdir): Likewise.
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(__execvpe): Likewise.
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(__execve): Likewise.
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(__setsid): Likewise.
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(__getuid): Likewise.
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(__geteuid): Likewise.
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(__getgid): Likewise.
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(__getegid): Likewise.
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(__getgroups): Likewise.
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(__group_member): Likewise.
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(__ttyname_r): Likewise.
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(__isatty): Likewise.
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(__readlink): Likewise.
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(__unlink): Likewise.
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(__gethostname): Likewise.
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(__profil): Likewise.
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(__getdtablesize): Likewise.
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(__brk): Likewise.
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(__ftruncate): Likewise.
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(__ftruncate64): Likewise.
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2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
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[BZ #18822]
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@ -23,9 +23,10 @@ libc_hidden_proto (tcgetpgrp)
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libc_hidden_proto (readlinkat)
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/* Now define the internal interfaces. */
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extern int __access (const char *__name, int __type);
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extern int __access (const char *__name, int __type) attribute_hidden;
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extern int __euidaccess (const char *__name, int __type);
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extern __off64_t __lseek64 (int __fd, __off64_t __offset, int __whence);
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extern __off64_t __lseek64 (int __fd, __off64_t __offset, int __whence)
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attribute_hidden;
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extern __off_t __lseek (int __fd, __off_t __offset, int __whence);
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libc_hidden_proto (__lseek)
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extern __off_t __libc_lseek (int __fd, __off_t __offset, int __whence);
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@ -39,7 +40,7 @@ extern ssize_t __pread64 (int __fd, void *__buf, size_t __nbytes,
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__off64_t __offset);
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libc_hidden_proto (__pread64);
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extern ssize_t __libc_pread64 (int __fd, void *__buf, size_t __nbytes,
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__off64_t __offset);
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__off64_t __offset) attribute_hidden;
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extern ssize_t __pwrite (int __fd, const void *__buf, size_t __n,
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__off_t __offset);
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libc_hidden_proto (__pwrite)
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@ -58,8 +59,8 @@ libc_hidden_proto (__libc_write)
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libc_hidden_proto (write)
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extern int __pipe (int __pipedes[2]);
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libc_hidden_proto (__pipe)
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extern int __pipe2 (int __pipedes[2], int __flags);
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extern unsigned int __sleep (unsigned int __seconds);
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extern int __pipe2 (int __pipedes[2], int __flags) attribute_hidden;
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extern unsigned int __sleep (unsigned int __seconds) attribute_hidden;
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extern int __chown (const char *__file,
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__uid_t __owner, __gid_t __group);
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libc_hidden_proto (__chown)
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@ -67,12 +68,12 @@ extern int __fchown (int __fd,
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__uid_t __owner, __gid_t __group);
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extern int __lchown (const char *__file, __uid_t __owner,
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__gid_t __group);
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extern int __chdir (const char *__path);
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extern int __fchdir (int __fd);
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extern char *__getcwd (char *__buf, size_t __size);
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extern int __rmdir (const char *__path);
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extern int __chdir (const char *__path) attribute_hidden;
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extern int __fchdir (int __fd) attribute_hidden;
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extern char *__getcwd (char *__buf, size_t __size) attribute_hidden;
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extern int __rmdir (const char *__path) attribute_hidden;
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extern int __execvpe (const char *file, char *const argv[],
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char *const envp[]);
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char *const envp[]) attribute_hidden;
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/* Get the canonical absolute name of the named directory, and put it in SIZE
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bytes of BUF. Returns NULL if the directory couldn't be determined or
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@ -91,7 +92,7 @@ libc_hidden_proto (__dup2)
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extern int __dup3 (int __fd, int __fd2, int flags);
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libc_hidden_proto (__dup3)
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extern int __execve (const char *__path, char *const __argv[],
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char *const __envp[]);
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char *const __envp[]) attribute_hidden;
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extern long int __pathconf (const char *__path, int __name);
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extern long int __fpathconf (int __fd, int __name);
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extern long int __sysconf (int __name);
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@ -99,14 +100,14 @@ libc_hidden_proto (__sysconf)
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extern __pid_t __getpid (void);
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libc_hidden_proto (__getpid)
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extern __pid_t __getppid (void);
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extern __pid_t __setsid (void);
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extern __uid_t __getuid (void);
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extern __uid_t __geteuid (void);
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extern __gid_t __getgid (void);
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extern __gid_t __getegid (void);
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extern int __getgroups (int __size, __gid_t __list[]);
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extern __pid_t __setsid (void) attribute_hidden;
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extern __uid_t __getuid (void) attribute_hidden;
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extern __uid_t __geteuid (void) attribute_hidden;
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extern __gid_t __getgid (void) attribute_hidden;
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extern __gid_t __getegid (void) attribute_hidden;
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extern int __getgroups (int __size, __gid_t __list[]) attribute_hidden;
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libc_hidden_proto (__getpgid)
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extern int __group_member (__gid_t __gid);
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extern int __group_member (__gid_t __gid) attribute_hidden;
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extern int __setuid (__uid_t __uid);
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extern int __setreuid (__uid_t __ruid, __uid_t __euid);
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extern int __setgid (__gid_t __gid);
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@ -123,18 +124,21 @@ libc_hidden_proto (__setresuid)
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libc_hidden_proto (__setresgid)
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extern __pid_t __vfork (void);
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libc_hidden_proto (__vfork)
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extern int __ttyname_r (int __fd, char *__buf, size_t __buflen);
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extern int __isatty (int __fd);
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extern int __ttyname_r (int __fd, char *__buf, size_t __buflen)
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attribute_hidden;
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extern int __isatty (int __fd) attribute_hidden;
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extern int __link (const char *__from, const char *__to);
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extern int __symlink (const char *__from, const char *__to);
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extern ssize_t __readlink (const char *__path, char *__buf, size_t __len);
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extern int __unlink (const char *__name);
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extern int __gethostname (char *__name, size_t __len);
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extern ssize_t __readlink (const char *__path, char *__buf, size_t __len)
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attribute_hidden;
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extern int __unlink (const char *__name) attribute_hidden;
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extern int __gethostname (char *__name, size_t __len) attribute_hidden;
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extern int __revoke (const char *__file);
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extern int __profil (unsigned short int *__sample_buffer, size_t __size,
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size_t __offset, unsigned int __scale);
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extern int __getdtablesize (void);
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extern int __brk (void *__addr);
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size_t __offset, unsigned int __scale)
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attribute_hidden;
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extern int __getdtablesize (void) attribute_hidden;
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extern int __brk (void *__addr) attribute_hidden;
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extern int __close (int __fd);
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libc_hidden_proto (__close)
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extern int __libc_close (int __fd);
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@ -146,8 +150,8 @@ extern __pid_t __fork (void);
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libc_hidden_proto (__fork)
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extern int __getpagesize (void) __attribute__ ((__const__));
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libc_hidden_proto (__getpagesize)
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extern int __ftruncate (int __fd, __off_t __length);
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extern int __ftruncate64 (int __fd, __off64_t __length);
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extern int __ftruncate (int __fd, __off_t __length) attribute_hidden;
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extern int __ftruncate64 (int __fd, __off64_t __length) attribute_hidden;
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extern int __truncate (const char *path, __off_t __length);
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extern void *__sbrk (intptr_t __delta);
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libc_hidden_proto (__sbrk)
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