From a1bd5f86739926469bbe0054b93305ff5905b070 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 2 Jan 2020 10:18:22 +0100
Subject: Linux: Use system call tables during build
Use <arch-syscall.h> instead of <asm/unistd.h> to obtain the system
call numbers. A few direct includes of <asm/unistd.h> need to be
removed (if the system call numbers are already provided indirectly
by <sysdep.h>) or replaced with <sys/syscall.h>.
Current Linux headers for alpha define the required system call names,
so most of the _NR_* hacks are no longer needed. For the 32-bit arm
architecture, eliminate the INTERNAL_SYSCALL_ARM macro, now that we
have regular system call names for cacheflush and set_tls. There are
more such cleanup opportunities for other architectures, but these
cleanups are required to avoid macro redefinition errors during the
build.
For ia64, it is desirable to use <asm/break.h> directly to obtain
the break number for system calls (which is not a system call number
itself). This requires replacing __BREAK_SYSCALL with
__IA64_BREAK_SYSCALL because the former is defined as an alias in
<asm/unistd.h>, but not in <asm/break.h>.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
sysdeps/unix/sysv/linux/sys/syscall.h | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
(limited to 'sysdeps/unix/sysv/linux/sys/syscall.h')
diff --git a/sysdeps/unix/sysv/linux/sys/syscall.h b/sysdeps/unix/sysv/linux/sys/syscall.h
index 2a42f5b..aa89a74 100644
--- a/sysdeps/unix/sysv/linux/sys/syscall.h
+++ b/sysdeps/unix/sysv/linux/sys/syscall.h
@@ -23,12 +23,9 @@
from the kernel sources. */
#include <asm/unistd.h>
-#ifndef _LIBC
-/* The Linux kernel header file defines macros `__NR_<name>', but some
- programs expect the traditional form `SYS_<name>'. So in building libc
- we scan the kernel's list and produce <bits/syscall.h> with macros for
- all the `SYS_' names. */
-# include <bits/syscall.h>
-#endif
+/* The Linux kernel header file defines macros __NR_*, but some
+ programs expect the traditional form SYS_*. <bits/syscall.h>
+ defines SYS_* macros for __NR_* macros of known names. */
+#include <bits/syscall.h>
#endif
--
cgit v1.1