mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
82 lines
2.3 KiB
Awk
82 lines
2.3 KiB
Awk
# Generate SYS_* macros from a list in a text file.
|
|
# Copyright (C) 2017-2023 Free Software Foundation, Inc.
|
|
# This file is part of the GNU C Library.
|
|
#
|
|
# The GNU C Library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# The GNU C Library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with the GNU C Library; if not, see
|
|
# <https://www.gnu.org/licenses/>.
|
|
|
|
# Emit a conditional definition for SYS_NAME.
|
|
function emit(name) {
|
|
print "#ifdef __NR_" name;
|
|
print "# define SYS_" name " __NR_" name;
|
|
print "#endif";
|
|
print "";
|
|
}
|
|
|
|
# Bail out with an error.
|
|
function fatal(message) {
|
|
print FILENAME ":" FNR ": " message > "/dev/stderr";
|
|
exit 1;
|
|
}
|
|
|
|
BEGIN {
|
|
name = "";
|
|
kernel = "";
|
|
}
|
|
|
|
# Skip empty lines and comments.
|
|
/^\s*(|#.*)$/ {
|
|
next;
|
|
}
|
|
|
|
# Kernel version. Used for documentation purposes only.
|
|
/^kernel [0-9.]+$/ {
|
|
if (kernel != "") {
|
|
fatal("duplicate kernel directive");
|
|
}
|
|
kernel = $2;
|
|
print "/* Generated at libc build time from syscall list. */";
|
|
print "/* The system call list corresponds to kernel " kernel ". */";
|
|
print "";
|
|
print "#ifndef _SYSCALL_H"
|
|
print "# error \"Never use <bits/syscall.h> directly; include <sys/syscall.h> instead.\"";
|
|
print "#endif";
|
|
print "";
|
|
split($2, kernel_version, ".");
|
|
kernel_major = kernel_version[1];
|
|
kernel_minor = kernel_version[2];
|
|
kernel_version_code = kernel_major * 65536 + kernel_minor * 256;
|
|
print "#define __GLIBC_LINUX_VERSION_CODE " kernel_version_code;
|
|
print "";
|
|
next;
|
|
}
|
|
|
|
# If there is just one word, it is a system call.
|
|
/^[a-zA-Z_][a-zA-Z0-9_]+$/ {
|
|
if (kernel == "") {
|
|
fatal("expected kernel directive before this line");
|
|
}
|
|
if ($1 <= name) {
|
|
fatal("name " name " violates ordering");
|
|
}
|
|
emit($1);
|
|
name = $1;
|
|
next;
|
|
}
|
|
|
|
# The rest has to be syntax errors.
|
|
// {
|
|
fatal("unrecognized syntax");
|
|
}
|