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[PATCH 25/58] Hide internal sysinfo functions [BZ #18822]
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: libc-alpha at sourceware dot org
- Date: Fri, 1 Sep 2017 10:59:56 -0700
- Subject: [PATCH 25/58] Hide internal sysinfo functions [BZ #18822]
- Authentication-results: sourceware.org; auth=none
- References: <20170901180029.9527-1-hjl.tools@gmail.com>
Hide internal sysinfo functions to allow direct access within libc.so
and libc.a without using GOT nor PLT.
[BZ #18822]
* include/sys/sysinfo.h (__get_nprocs_conf): Add
libc_hidden_proto.
(__get_nprocs): Likewise.
(__get_phys_pages): Likewise.
(__get_avphys_pages): Likewise.
(__get_child_max): Add attribute_hidden.
* misc/getsysstats.c (__get_nprocs_conf): Add libc_hidden_def.
(__get_nprocs): Likewise.
(__get_phys_pages): Likewise.
(__get_avphys_pages): Likewise.
* sysdeps/mach/getsysstats.c (__get_nprocs_conf): Add
libc_hidden_def.
(__get_nprocs): Likewise.
(__get_phys_pages): Likewise.
(__get_avphys_pages): Likewise.
* sysdeps/unix/sysv/linux/getsysstats.c (__get_nprocs): Add
libc_hidden_def.
(__get_nprocs_conf): Likewise.
(__get_phys_pages): Likewise.
(__get_avphys_pages): Likewise.
---
include/sys/sysinfo.h | 6 +++++-
misc/getsysstats.c | 4 ++++
sysdeps/mach/getsysstats.c | 4 ++++
sysdeps/unix/sysv/linux/getsysstats.c | 4 ++++
4 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/include/sys/sysinfo.h b/include/sys/sysinfo.h
index c33eae2883..7388356a19 100644
--- a/include/sys/sysinfo.h
+++ b/include/sys/sysinfo.h
@@ -7,18 +7,22 @@
/* Return number of configured processors. */
extern int __get_nprocs_conf (void);
+libc_hidden_proto (__get_nprocs_conf)
/* Return number of available processors. */
extern int __get_nprocs (void);
+libc_hidden_proto (__get_nprocs)
/* Return number of physical pages of memory in the system. */
extern long int __get_phys_pages (void);
+libc_hidden_proto (__get_phys_pages)
/* Return number of available physical pages of memory in the system. */
extern long int __get_avphys_pages (void);
+libc_hidden_proto (__get_avphys_pages)
/* Return maximum number of processes this real user ID can have. */
-extern long int __get_child_max (void);
+extern long int __get_child_max (void) attribute_hidden;
# endif /* !_ISOMAC */
#endif /* sys/sysinfo.h */
diff --git a/misc/getsysstats.c b/misc/getsysstats.c
index d25770ec52..cbad87a3a2 100644
--- a/misc/getsysstats.c
+++ b/misc/getsysstats.c
@@ -26,6 +26,7 @@ __get_nprocs_conf (void)
/* We don't know how to determine the number. Simply return always 1. */
return 1;
}
+libc_hidden_def (__get_nprocs_conf)
weak_alias (__get_nprocs_conf, get_nprocs_conf)
link_warning (get_nprocs_conf, "warning: get_nprocs_conf will always return 1")
@@ -38,6 +39,7 @@ __get_nprocs (void)
/* We don't know how to determine the number. Simply return always 1. */
return 1;
}
+libc_hidden_def (__get_nprocs)
weak_alias (__get_nprocs, get_nprocs)
link_warning (get_nprocs, "warning: get_nprocs will always return 1")
@@ -50,6 +52,7 @@ __get_phys_pages (void)
__set_errno (ENOSYS);
return -1;
}
+libc_hidden_def (__get_phys_pages)
weak_alias (__get_phys_pages, get_phys_pages)
stub_warning (get_phys_pages)
@@ -62,6 +65,7 @@ __get_avphys_pages (void)
__set_errno (ENOSYS);
return -1;
}
+libc_hidden_def (__get_avphys_pages)
weak_alias (__get_avphys_pages, get_avphys_pages)
stub_warning (get_avphys_pages)
diff --git a/sysdeps/mach/getsysstats.c b/sysdeps/mach/getsysstats.c
index 0dacab0300..3aabd61382 100644
--- a/sysdeps/mach/getsysstats.c
+++ b/sysdeps/mach/getsysstats.c
@@ -39,6 +39,7 @@ __get_nprocs_conf (void)
return hbi.max_cpus;
}
+libc_hidden_def (__get_nprocs_conf)
weak_alias (__get_nprocs_conf, get_nprocs_conf)
/* Return the number of processors currently available on the system. */
@@ -58,6 +59,7 @@ __get_nprocs (void)
return hbi.avail_cpus;
}
+libc_hidden_def (__get_nprocs)
weak_alias (__get_nprocs, get_nprocs)
/* Return the number of physical pages on the system. */
@@ -77,6 +79,7 @@ __get_phys_pages (void)
return hbi.memory_size / __vm_page_size;
}
+libc_hidden_def (__get_phys_pages)
weak_alias (__get_phys_pages, get_phys_pages)
/* Return the number of available physical pages */
@@ -102,4 +105,5 @@ __get_avphys_pages (void)
return vs.free_count;
}
+libc_hidden_def (__get_avphys_pages)
weak_alias (__get_avphys_pages, get_avphys_pages)
diff --git a/sysdeps/unix/sysv/linux/getsysstats.c b/sysdeps/unix/sysv/linux/getsysstats.c
index d02c86d739..c245b3c662 100644
--- a/sysdeps/unix/sysv/linux/getsysstats.c
+++ b/sysdeps/unix/sysv/linux/getsysstats.c
@@ -226,6 +226,7 @@ __get_nprocs (void)
return result;
}
+libc_hidden_def (__get_nprocs)
weak_alias (__get_nprocs, get_nprocs)
@@ -279,6 +280,7 @@ __get_nprocs_conf (void)
return result;
}
+libc_hidden_def (__get_nprocs_conf)
weak_alias (__get_nprocs_conf, get_nprocs_conf)
@@ -320,6 +322,7 @@ __get_phys_pages (void)
__sysinfo (&info);
return sysinfo_mempages (info.totalram, info.mem_unit);
}
+libc_hidden_def (__get_phys_pages)
weak_alias (__get_phys_pages, get_phys_pages)
long int
@@ -330,4 +333,5 @@ __get_avphys_pages (void)
__sysinfo (&info);
return sysinfo_mempages (info.freeram, info.mem_unit);
}
+libc_hidden_def (__get_avphys_pages)
weak_alias (__get_avphys_pages, get_avphys_pages)
--
2.13.5