1# 2# CDDL HEADER START 3# 4# The contents of this file are subject to the terms of the 5# Common Development and Distribution License (the "License"). 6# You may not use this file except in compliance with the License. 7# 8# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9# or http://www.opensolaris.org/os/licensing. 10# See the License for the specific language governing permissions 11# and limitations under the License. 12# 13# When distributing Covered Code, include this CDDL HEADER in each 14# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15# If applicable, add the following below this CDDL HEADER, with the 16# fields enclosed by brackets "[]" replaced with your own identifying 17# information: Portions Copyright [yyyy] [name of copyright owner] 18# 19# CDDL HEADER END 20# 21# Copyright 2008 Sun Microsystems, Inc. All rights reserved. 22# Use is subject to license terms. 23# 24# Copyright 2025 Oxide Computer Company 25# 26# Create two files from a list of input strings. 27# 28# new_list.c: 29# contains an array of characters indexed into by perror and 30# strerror and an array of strings for strerrorname_np. 31# -> _sys_nerrs, _sys_nindex and _sys_err_names 32# 33# errlst.c: 34# contains an array of pointers to strings for compatibility 35# with existing user programs that reference it directly; 36# errlst.c references the strings indirectly using a library private symbol, 37# __sys_errs[], in order to get relative relocations. 38# -> _sys_errs, _sys_index, _sys_num_err, sys_errlist[] 39# 40# Since the 64 bit ABI doesn't define the old symbols, the second file is left 41# out of 64 bit libraries. 42 43BEGIN { 44 FS = "\t" 45 46 # This is the number of entries for the legacy sys_errlist[]. 47 # This cannot change as old binaries may reference the copy 48 # relocated sys_errlist, and the data to which it points, directly. New 49 # code should always use perror(), strerror() et al., and that is the 50 # only interface available in the 64-bit library. This is not the only 51 # check to guard against unintended changes, there are also constraints 52 # in the libc mapfile that will cause a link failure if the size 53 # changes. 54 legacynum = 151 55 56 newfile = "new_list.c" 57 oldfile = "errlst.c" 58 59 print "#pragma weak _sys_errlist = sys_errlist" >oldfile 60 print "#pragma weak __sys_errs = _sys_errs" >oldfile 61 print "#include \"lint.h\"\n" >oldfile 62 # We need to include the errors strings proper in the 63 # C source for gettext; the macro C allows us to embed 64 # them as a comment. 65 print "#define\tC(x)\n" >oldfile 66 67 print "#include \"lint.h\"" >newfile 68 print "#include <sys/isa_defs.h>" >newfile 69 print "#include <errno.h>" >newfile 70 print "" >newfile 71} 72 73/^[0-9]+/ { 74 aname[$1] = $2 75 astr[$1] = $3 76 if ($1 > max) 77 max = $1 78} 79 80function genlists(outfile, v_index, v_errs, v_num) { 81 for (j = 0; j <= max; ++j) { 82 if (astr[j] == "") 83 astr[j] = sprintf("Error %d", j) 84 } 85 86 k = 0 87 printf "const int %s[%s] = {\n", v_index, max + 1 >outfile 88 for (j = 0; j <= max; ++j) { 89 printf "\t%d,\n", k >outfile 90 k += length(astr[j]) + 1 91 } 92 print "};\n" >outfile 93 94 print "/* This is one long string */" >outfile 95 printf "const char %s[%d] =\n", v_errs, k >outfile 96 for (j = 0; j <= max; ++j) 97 printf "\t\"%s\\0\"\n", astr[j] >outfile 98 print ";\n" >outfile 99 printf "const int %s = %d;\n\n", v_num, max + 1 >outfile 100} 101 102/^== End of legacy/ { 103 # 104 # Generate the legacy lists that have become part of the ABI 105 # and must not change. 106 # 107 108 # Check that the legacy sys_errlist[] is the correct size. 109 if (max != legacynum) { 110 printf "awk: ERROR! sys_errlist[] != %d entries\n", legacynum 111 printf "Please read comments in" 112 printf " usr/src/lib/libc/port/gen/errlist\n" 113 exit 1 114 } 115 116 117 genlists(oldfile, "_sys_index", "_sys_errs", "_sys_num_err") 118 print "#undef sys_nerr" >oldfile 119 print "#pragma weak _sys_nerr = _sys_num_err" >oldfile 120 print "#pragma weak sys_nerr = _sys_num_err" >oldfile 121 122 k = 0 123 print "const char *sys_errlist[] = {" >oldfile 124 for (j = 0; j <= max; ++j) { 125 printf "\t&_sys_errs[%d], C(\"%s\")\n", k, astr[j] \ 126 >oldfile 127 k += length(astr[j]) + 1 128 } 129 print "};\n" >oldfile 130} 131 132END { 133 # 134 # Generate the new lists that are used internally by libc and 135 # do not form part of the ABI. 136 # 137 138 genlists(newfile, "_sys_nindex", "_sys_nerrs", "_sys_num_nerr") 139 140 # 141 # This stanza is used to generate the array of names for mapping 142 # an errno to its constant (e.g. "ENOENT"). 143 # 144 145 printf "const char *_sys_err_names[%d] = {\n", max + 1 >newfile 146 printf "\t[0] = \"0\",\n" >newfile 147 for (j = 1; j <= max; ++j) 148 { 149 if (aname[j] == "" || aname[j] == "SKIP") 150 continue 151 printf "\t[%s] = \"%s\",\n", aname[j], aname[j] >newfile 152 } 153 print "};\n" > newfile 154} 155