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authorH.J. Lu <hjl.tools@gmail.com>2017-10-01 15:11:40 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-10-01 15:12:04 -0700
commit7ec4b39ac484ba65e011dde4e8ff0b7f478efc7c (patch)
treeefaa7b0f669fef980f785bff6cca6f8b3ef6131b /include
parent8345a76018851ba52e05216e3d7c772e24d5da44 (diff)
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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.
Diffstat (limited to 'include')
-rw-r--r--include/unistd.h60
1 files changed, 32 insertions, 28 deletions
diff --git a/include/unistd.h b/include/unistd.h
index bfe0e4d..f884fda 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -23,9 +23,10 @@ libc_hidden_proto (tcgetpgrp)
libc_hidden_proto (readlinkat)
/* Now define the internal interfaces. */
-extern int __access (const char *__name, int __type);
+extern int __access (const char *__name, int __type) attribute_hidden;
extern int __euidaccess (const char *__name, int __type);
-extern __off64_t __lseek64 (int __fd, __off64_t __offset, int __whence);
+extern __off64_t __lseek64 (int __fd, __off64_t __offset, int __whence)
+ attribute_hidden;
extern __off_t __lseek (int __fd, __off_t __offset, int __whence);
libc_hidden_proto (__lseek)
extern __off_t __libc_lseek (int __fd, __off_t __offset, int __whence);
@@ -39,7 +40,7 @@ extern ssize_t __pread64 (int __fd, void *__buf, size_t __nbytes,
__off64_t __offset);
libc_hidden_proto (__pread64);
extern ssize_t __libc_pread64 (int __fd, void *__buf, size_t __nbytes,
- __off64_t __offset);
+ __off64_t __offset) attribute_hidden;
extern ssize_t __pwrite (int __fd, const void *__buf, size_t __n,
__off_t __offset);
libc_hidden_proto (__pwrite)
@@ -58,8 +59,8 @@ libc_hidden_proto (__libc_write)
libc_hidden_proto (write)
extern int __pipe (int __pipedes[2]);
libc_hidden_proto (__pipe)
-extern int __pipe2 (int __pipedes[2], int __flags);
-extern unsigned int __sleep (unsigned int __seconds);
+extern int __pipe2 (int __pipedes[2], int __flags) attribute_hidden;
+extern unsigned int __sleep (unsigned int __seconds) attribute_hidden;
extern int __chown (const char *__file,
__uid_t __owner, __gid_t __group);
libc_hidden_proto (__chown)
@@ -67,12 +68,12 @@ extern int __fchown (int __fd,
__uid_t __owner, __gid_t __group);
extern int __lchown (const char *__file, __uid_t __owner,
__gid_t __group);
-extern int __chdir (const char *__path);
-extern int __fchdir (int __fd);
-extern char *__getcwd (char *__buf, size_t __size);
-extern int __rmdir (const char *__path);
+extern int __chdir (const char *__path) attribute_hidden;
+extern int __fchdir (int __fd) attribute_hidden;
+extern char *__getcwd (char *__buf, size_t __size) attribute_hidden;
+extern int __rmdir (const char *__path) attribute_hidden;
extern int __execvpe (const char *file, char *const argv[],
- char *const envp[]);
+ char *const envp[]) attribute_hidden;
/* Get the canonical absolute name of the named directory, and put it in SIZE
bytes of BUF. Returns NULL if the directory couldn't be determined or
@@ -91,7 +92,7 @@ libc_hidden_proto (__dup2)
extern int __dup3 (int __fd, int __fd2, int flags);
libc_hidden_proto (__dup3)
extern int __execve (const char *__path, char *const __argv[],
- char *const __envp[]);
+ char *const __envp[]) attribute_hidden;
extern long int __pathconf (const char *__path, int __name);
extern long int __fpathconf (int __fd, int __name);
extern long int __sysconf (int __name);
@@ -99,14 +100,14 @@ libc_hidden_proto (__sysconf)
extern __pid_t __getpid (void);
libc_hidden_proto (__getpid)
extern __pid_t __getppid (void);
-extern __pid_t __setsid (void);
-extern __uid_t __getuid (void);
-extern __uid_t __geteuid (void);
-extern __gid_t __getgid (void);
-extern __gid_t __getegid (void);
-extern int __getgroups (int __size, __gid_t __list[]);
+extern __pid_t __setsid (void) attribute_hidden;
+extern __uid_t __getuid (void) attribute_hidden;
+extern __uid_t __geteuid (void) attribute_hidden;
+extern __gid_t __getgid (void) attribute_hidden;
+extern __gid_t __getegid (void) attribute_hidden;
+extern int __getgroups (int __size, __gid_t __list[]) attribute_hidden;
libc_hidden_proto (__getpgid)
-extern int __group_member (__gid_t __gid);
+extern int __group_member (__gid_t __gid) attribute_hidden;
extern int __setuid (__uid_t __uid);
extern int __setreuid (__uid_t __ruid, __uid_t __euid);
extern int __setgid (__gid_t __gid);
@@ -123,18 +124,21 @@ libc_hidden_proto (__setresuid)
libc_hidden_proto (__setresgid)
extern __pid_t __vfork (void);
libc_hidden_proto (__vfork)
-extern int __ttyname_r (int __fd, char *__buf, size_t __buflen);
-extern int __isatty (int __fd);
+extern int __ttyname_r (int __fd, char *__buf, size_t __buflen)
+ attribute_hidden;
+extern int __isatty (int __fd) attribute_hidden;
extern int __link (const char *__from, const char *__to);
extern int __symlink (const char *__from, const char *__to);
-extern ssize_t __readlink (const char *__path, char *__buf, size_t __len);
-extern int __unlink (const char *__name);
-extern int __gethostname (char *__name, size_t __len);
+extern ssize_t __readlink (const char *__path, char *__buf, size_t __len)
+ attribute_hidden;
+extern int __unlink (const char *__name) attribute_hidden;
+extern int __gethostname (char *__name, size_t __len) attribute_hidden;
extern int __revoke (const char *__file);
extern int __profil (unsigned short int *__sample_buffer, size_t __size,
- size_t __offset, unsigned int __scale);
-extern int __getdtablesize (void);
-extern int __brk (void *__addr);
+ size_t __offset, unsigned int __scale)
+ attribute_hidden;
+extern int __getdtablesize (void) attribute_hidden;
+extern int __brk (void *__addr) attribute_hidden;
extern int __close (int __fd);
libc_hidden_proto (__close)
extern int __libc_close (int __fd);
@@ -146,8 +150,8 @@ extern __pid_t __fork (void);
libc_hidden_proto (__fork)
extern int __getpagesize (void) __attribute__ ((__const__));
libc_hidden_proto (__getpagesize)
-extern int __ftruncate (int __fd, __off_t __length);
-extern int __ftruncate64 (int __fd, __off64_t __length);
+extern int __ftruncate (int __fd, __off_t __length) attribute_hidden;
+extern int __ftruncate64 (int __fd, __off64_t __length) attribute_hidden;
extern int __truncate (const char *path, __off_t __length);
extern void *__sbrk (intptr_t __delta);
libc_hidden_proto (__sbrk)