[PATCH v2 2/5] Linux: Assume and consolidate getsockname wire-up syscall

Adhemerval Zanella adhemerval.zanella@linaro.org
Wed Dec 7 21:22:43 GMT 2022 

And disable if kernel does not support it.

Checked on x86_64-linux-gnu and i686-linux-gnu.
---
 sysdeps/unix/sysv/linux/generic/syscalls.list        | 1 -
 sysdeps/unix/sysv/linux/getsockname.c                | 7 +------
 sysdeps/unix/sysv/linux/i386/kernel-features.h       | 2 +-
 sysdeps/unix/sysv/linux/kernel-features.h            | 1 +
 sysdeps/unix/sysv/linux/m68k/kernel-features.h       | 2 +-
 sysdeps/unix/sysv/linux/microblaze/kernel-features.h | 1 -
 sysdeps/unix/sysv/linux/powerpc/kernel-features.h    | 1 -
 sysdeps/unix/sysv/linux/s390/kernel-features.h       | 2 +-
 sysdeps/unix/sysv/linux/sh/kernel-features.h         | 1 -
 sysdeps/unix/sysv/linux/sparc/kernel-features.h      | 6 ++++++
 10 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/generic/syscalls.list b/sysdeps/unix/sysv/linux/generic/syscalls.list
index 7dbfde0dae..e89ce91ac0 100644
--- a/sysdeps/unix/sysv/linux/generic/syscalls.list
+++ b/sysdeps/unix/sysv/linux/generic/syscalls.list
@@ -1,5 +1,4 @@
 # File name	Caller	Syscall name	# args	Strong name	Weak names
 
 # Socket APIs
-getsockname	-	getsockname	i:ipp	__getsockname	getsockname
 getpeername	-	getpeername	i:ipp	__getpeername	getpeername
diff --git a/sysdeps/unix/sysv/linux/getsockname.c b/sysdeps/unix/sysv/linux/getsockname.c
index d0718c2aaf..8350b800fe 100644
--- a/sysdeps/unix/sysv/linux/getsockname.c
+++ b/sysdeps/unix/sysv/linux/getsockname.c
@@ -15,19 +15,14 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <signal.h>
 #include <sys/socket.h>
-
 #include <socketcall.h>
-#include <kernel-features.h>
-#include <sys/syscall.h>
 
 int
 __getsockname (int fd, __SOCKADDR_ARG addr, socklen_t *len)
 {
 #ifdef __ASSUME_GETSOCKNAME_SYSCALL
-  return INLINE_SYSCALL (getsockname, 3, fd, addr.__sockaddr__, len);
+  return INLINE_SYSCALL_CALL (getsockname, fd, addr.__sockaddr__, len);
 #else
   return SOCKETCALL (getsockname, fd, addr.__sockaddr__, len);
 #endif
diff --git a/sysdeps/unix/sysv/linux/i386/kernel-features.h b/sysdeps/unix/sysv/linux/i386/kernel-features.h
index ddf9ec0e5f..0c949349e1 100644
--- a/sysdeps/unix/sysv/linux/i386/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/i386/kernel-features.h
@@ -19,7 +19,6 @@
 
 /* Direct socketcalls available with kernel 4.3.  */
 #if __LINUX_KERNEL_VERSION >= 0x040300
-# define __ASSUME_GETSOCKNAME_SYSCALL        1
 # define __ASSUME_GETPEERNAME_SYSCALL        1
 #endif
 
@@ -42,6 +41,7 @@
 # undef __ASSUME_SOCKETPAIR_SYSCALL
 # undef __ASSUME_LISTEN_SYSCALL
 # undef __ASSUME_SHUTDOWN_SYSCALL
+# undef __ASSUME_GETSOCKNAME_SYSCALL
 #endif
 
 /* i686 only supports ipc syscall before 5.1.  */
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index e63bd4b4fc..cac8708050 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -84,6 +84,7 @@
 #define __ASSUME_SOCKETPAIR_SYSCALL	1
 #define __ASSUME_LISTEN_SYSCALL		1
 #define __ASSUME_SHUTDOWN_SYSCALL	1
+#define __ASSUME_GETSOCKNAME_SYSCALL	1
 
 /* Support for SysV IPC through wired syscalls.  All supported architectures
    either support ipc syscall and/or all the ipc correspondent syscalls.  */
diff --git a/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
index 55b8958fb2..b8f8e48c8a 100644
--- a/sysdeps/unix/sysv/linux/m68k/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
@@ -19,7 +19,6 @@
 
 /* Direct socketcalls available with kernel 4.3.  */
 #if __LINUX_KERNEL_VERSION >= 0x040300
-# define __ASSUME_GETSOCKNAME_SYSCALL        1
 # define __ASSUME_GETPEERNAME_SYSCALL        1
 #endif
 
@@ -44,6 +43,7 @@
 # undef __ASSUME_SOCKETPAIR_SYSCALL
 # undef __ASSUME_LISTEN_SYSCALL
 # undef __ASSUME_SHUTDOWN_SYSCALL
+# undef __ASSUME_GETSOCKNAME_SYSCALL
 #endif
 
 /* No support for PI futexes or robust mutexes before 3.10 for m68k.  */
diff --git a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
index 9ee6c621ee..12f9a55b03 100644
--- a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
@@ -19,7 +19,6 @@
 
 /* All supported kernel versions for MicroBlaze have these syscalls.  */
 #define __ASSUME_CONNECT_SYSCALL	1
-#define __ASSUME_GETSOCKNAME_SYSCALL	1
 #define __ASSUME_GETPEERNAME_SYSCALL	1
 #define __ASSUME_SEND_SYSCALL		1
 #define __ASSUME_RECV_SYSCALL		1
diff --git a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
index ad9eb340b5..852bac0313 100644
--- a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
@@ -19,7 +19,6 @@
 
 /* New syscalls added for PowerPC in 2.6.37.  */
 #define __ASSUME_CONNECT_SYSCALL	1
-#define __ASSUME_GETSOCKNAME_SYSCALL	1
 #define __ASSUME_GETPEERNAME_SYSCALL	1
 #define __ASSUME_SEND_SYSCALL		1
 #define __ASSUME_RECV_SYSCALL		1
diff --git a/sysdeps/unix/sysv/linux/s390/kernel-features.h b/sysdeps/unix/sysv/linux/s390/kernel-features.h
index e47c628f51..3a3942fa68 100644
--- a/sysdeps/unix/sysv/linux/s390/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/s390/kernel-features.h
@@ -19,7 +19,6 @@
 
 /* Direct socketcalls available with kernel 4.3.  */
 #if __LINUX_KERNEL_VERSION >= 0x040300
-# define __ASSUME_GETSOCKNAME_SYSCALL        1
 # define __ASSUME_GETPEERNAME_SYSCALL        1
 #endif
 
@@ -44,6 +43,7 @@
 # undef __ASSUME_SOCKETPAIR_SYSCALL
 # undef __ASSUME_LISTEN_SYSCALL
 # undef __ASSUME_SHUTDOWN_SYSCALL
+# undef __ASSUME_GETSOCKNAME_SYSCALL
 #endif
 
 /* s390 only supports ipc syscall before 5.1.  */
diff --git a/sysdeps/unix/sysv/linux/sh/kernel-features.h b/sysdeps/unix/sysv/linux/sh/kernel-features.h
index 0ab656d58e..7a15569dfc 100644
--- a/sysdeps/unix/sysv/linux/sh/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sh/kernel-features.h
@@ -24,7 +24,6 @@
 
 /* These syscalls were added for SH in 2.6.37.  */
 #define __ASSUME_CONNECT_SYSCALL	1
-#define __ASSUME_GETSOCKNAME_SYSCALL	1
 #define __ASSUME_GETPEERNAME_SYSCALL	1
 #define __ASSUME_SEND_SYSCALL		1
 #define __ASSUME_RECV_SYSCALL		1
diff --git a/sysdeps/unix/sysv/linux/sparc/kernel-features.h b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
index 12e98a9f95..8ada43587b 100644
--- a/sysdeps/unix/sysv/linux/sparc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
@@ -42,6 +42,12 @@
 # undef __ASSUME_SETSOCKOPT_SYSCALL
 #endif
 
+/* There syscalls were added for 32-bit in compat syscall table only
+   in 4.20 (but present for 64-bit in all supported kernel versions).  */
+#if !defined __arch64__ && __LINUX_KERNEL_VERSION < 0x041400
+# undef __ASSUME_GETSOCKNAME_SYSCALL
+#endif
+
 /* These syscalls were added for both 32-bit and 64-bit in 4.4.  */
 #if __LINUX_KERNEL_VERSION < 0x040400
 # undef __ASSUME_BIND_SYSCALL
-- 
2.34.1

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