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Changes of Revision 9
View file
_service:tar_scm:glibc.spec
Changed
@@ -65,7 +65,7 @@ ############################################################################## Name: glibc Version: 2.36 -Release: 13 +Release: 14 Summary: The GNU libc libraries License: %{all_license} URL: http://www.gnu.org/software/glibc/ @@ -93,6 +93,9 @@ Patch7: 0001-syslog-Remove-extra-whitespace-between-timestamp-and.patch Patch8: Makerules-fix-MAKEFLAGS-assignment-for-upcoming-make.patch Patch9: gmon-Fix-allocated-buffer-overflow-bug-29444.patch +Patch10: stdlib-strfrom-Add-copysign-to-fix-NAN-issue-on-risc.patch +Patch11: Assume-only-FLAG_ELF_LIBC6-suport.patch +Patch12: elf-Restore-ldconfig-libc6-implicit-soname-logic-BZ-.patch Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch Patch9001: locale-delete-no-hard-link-to-avoid-all_language-pac.patch @@ -1269,6 +1272,12 @@ %endif %changelog +* Mon May 08 2023 laokz <zhangkai@iscas.ac.cn> - 2.36-14 +- Backport RISC-V patches: + - stdlib/strfrom: Add copysign to fix NAN issue (from v2.37) + - Assume only FLAG_ELF_LIBC6 suport (from v2.37) + - Restore libc6 implicit soname logic (from v2.38) + * Thu Feb 23 2023 Qingqing Li <liqingqing3@huawei.com> - 2.36-13 - gmon: Fix allocated buffer overflow (bug 29444)
View file
_service:tar_scm:Assume-only-FLAG_ELF_LIBC6-suport.patch
Added
@@ -0,0 +1,658 @@ +From 8ee878592c4a642937152c8308b8faef86bcfc40 Mon Sep 17 00:00:00 2001 +From: "Lucas A. M. Magalhaes" <lamm@linux.ibm.com> +Date: Thu, 14 Jul 2022 14:37:22 -0300 +Subject: PATCH Assume only FLAG_ELF_LIBC6 suport + +The older libc versions are obsolete for over twenty years now. +This patch removes the special flags for libc5 and libc4 and assumes +that all libraries cached are libc6 compatible and use FLAG_ELF_LIBC6. + +Checked with a build for all affected architectures. + +Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> +Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> +--- + elf/cache.c | 6 +- + elf/ldconfig.c | 63 ++----------------- + elf/readelflib.c | 46 ++------------ + elf/readlib.c | 25 +------- + sysdeps/unix/sysv/linux/aarch64/ldconfig.h | 30 --------- + sysdeps/unix/sysv/linux/arc/ldconfig.h | 27 -------- + sysdeps/unix/sysv/linux/arm/ldconfig.h | 25 -------- + sysdeps/unix/sysv/linux/csky/ldconfig.h | 34 ---------- + sysdeps/unix/sysv/linux/i386/ldconfig.h | 6 -- + sysdeps/unix/sysv/linux/ia64/ldconfig.h | 24 ------- + sysdeps/unix/sysv/linux/m68k/ldconfig.h | 1 - + .../unix/sysv/linux/mips/mips64/ldconfig.h | 25 -------- + sysdeps/unix/sysv/linux/powerpc/ldconfig.h | 27 -------- + sysdeps/unix/sysv/linux/riscv/ldconfig.h | 36 ----------- + sysdeps/unix/sysv/linux/s390/ldconfig.h | 7 --- + sysdeps/unix/sysv/linux/x86_64/ldconfig.h | 26 -------- + 16 files changed, 14 insertions(+), 394 deletions(-) + delete mode 100644 sysdeps/unix/sysv/linux/aarch64/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/arc/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/arm/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/csky/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/ia64/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/m68k/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/mips/mips64/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/powerpc/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/riscv/ldconfig.h + delete mode 100644 sysdeps/unix/sysv/linux/x86_64/ldconfig.h + +diff --git a/elf/cache.c b/elf/cache.c +index 3d7d3a67bf..f5f3ef8c4d 100644 +--- a/elf/cache.c ++++ b/elf/cache.c +@@ -157,6 +157,7 @@ struct cache_entry + /* List of all cache entries. */ + static struct cache_entry *entries; + ++/* libc4, ELF and libc5 are unsupported. */ + static const char *flag_descr = + { "libc4", "ELF", "libc5", "libc6"}; + +@@ -168,14 +169,11 @@ print_entry (const char *lib, int flag, uint64_t hwcap, + printf ("\t%s (", lib); + switch (flag & FLAG_TYPE_MASK) + { +- case FLAG_LIBC4: +- case FLAG_ELF: +- case FLAG_ELF_LIBC5: + case FLAG_ELF_LIBC6: + fputs (flag_descrflag & FLAG_TYPE_MASK, stdout); + break; + default: +- fputs (_("unknown"), stdout); ++ fputs (_("unknown or unsupported flag"), stdout); + break; + } + switch (flag & FLAG_REQUIRED_MASK) +diff --git a/elf/ldconfig.c b/elf/ldconfig.c +index 9394ac6438..6f37f38f35 100644 +--- a/elf/ldconfig.c ++++ b/elf/ldconfig.c +@@ -65,19 +65,6 @@ + + #define PACKAGE _libc_intl_domainname + +-static const struct +-{ +- const char *name; +- int flag; +-} lib_types = +-{ +- {"libc4", FLAG_LIBC4}, +- {"libc5", FLAG_ELF_LIBC5}, +- {"libc6", FLAG_ELF_LIBC6}, +- {"glibc2", FLAG_ELF_LIBC6} +-}; +- +- + /* List of directories to handle. */ + struct dir_entry + { +@@ -469,27 +456,8 @@ add_dir_1 (const char *line, const char *from_file, int from_line) + entry->from_file = strdup (from_file); + entry->from_line = from_line; + +- /* Search for an '=' sign. */ + entry->path = xstrdup (line); +- char *equal_sign = strchr (entry->path, '='); +- if (equal_sign) +- { +- *equal_sign = '\0'; +- ++equal_sign; +- entry->flag = FLAG_ANY; +- for (i = 0; i < sizeof (lib_types) / sizeof (lib_types0); ++i) +- if (strcmp (equal_sign, lib_typesi.name) == 0) +- { +- entry->flag = lib_typesi.flag; +- break; +- } +- if (entry->flag == FLAG_ANY) +- error (0, 0, _("%s is not a known library type"), equal_sign); +- } +- else +- { +- entry->flag = FLAG_ANY; +- } ++ entry->flag = FLAG_ELF_LIBC6; + + /* Canonify path: for now only remove leading and trailing + whitespace and the trailing slashes. */ +@@ -1054,23 +1022,11 @@ search_dir (const struct dir_entry *entry) + soname = xstrdup (direntry->d_name); + } + +- if (flag == FLAG_ELF +- && (entry->flag == FLAG_ELF_LIBC5 +- || entry->flag == FLAG_ELF_LIBC6)) +- flag = entry->flag; +- + /* Some sanity checks to print warnings. */ + if (opt_verbose) + { +- if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5 +- && entry->flag != FLAG_ANY) +- error (0, 0, _("libc5 library %s in wrong directory"), file_name); +- if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6 +- && entry->flag != FLAG_ANY) ++ if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6) + error (0, 0, _("libc6 library %s in wrong directory"), file_name); +- if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4 +- && entry->flag != FLAG_ANY) +- error (0, 0, _("libc4 library %s in wrong directory"), file_name); + } + + /* Add library to list. */ +@@ -1089,19 +1045,8 @@ search_dir (const struct dir_entry *entry) + /* It's newer - add it. */ + /* Flag should be the same - sanity check. */ + if (dlib_ptr->flag != flag) +- { +- if (dlib_ptr->flag == FLAG_ELF +- && (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6)) +- dlib_ptr->flag = flag; +- else if ((dlib_ptr->flag == FLAG_ELF_LIBC5 +- || dlib_ptr->flag == FLAG_ELF_LIBC6) +- && flag == FLAG_ELF) +- dlib_ptr->flag = flag; +- else +- error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), +- dlib_ptr->name, direntry->d_name, +- entry->path); +- } ++ error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), ++ dlib_ptr->name, direntry->d_name, entry->path); + free (dlib_ptr->name); + dlib_ptr->name = xstrdup (direntry->d_name); + dlib_ptr->is_link = is_link; +diff --git a/elf/readelflib.c b/elf/readelflib.c +index 771182b5d0..5f43e0230d 100644 +--- a/elf/readelflib.c ++++ b/elf/readelflib.c +@@ -44,7 +44,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, + size_t file_length) + { + int i; +- unsigned int j; + unsigned int dynamic_addr; + size_t dynamic_size; + char *program_interpreter; +@@ -81,9 +80,8 @@ process_elf_file (const char *file_name, const char *lib, int *flag, + elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents); + check_ptr (elf_pheader); + +- /* The library is an elf library, now search for soname and +- libc5/libc6. */ +- *flag = FLAG_ELF; ++ /* The library is an elf library. */ ++ *flag = FLAG_ELF_LIBC6; + + /* The default ISA level is 0. */ + *isa_level = 0; +@@ -110,16 +108,6 @@ process_elf_file (const char *file_name, const char *lib, int *flag, + program_interpreter = (char *) (file_contents + segment->p_offset); + check_ptr (program_interpreter); + +- /* Check if this is enough to classify the binary. */
View file
_service:tar_scm:elf-Restore-ldconfig-libc6-implicit-soname-logic-BZ-.patch
Added
@@ -0,0 +1,214 @@ +From 1b0ea8c5d886fedabd611a569b5ec58a6f5153e6 Mon Sep 17 00:00:00 2001 +From: Joan Bruguera <joanbrugueram@gmail.com> +Date: Sat, 18 Feb 2023 21:52:15 +0000 +Subject: PATCH elf: Restore ldconfig libc6 implicit soname logic BZ #30125 + +While cleaning up old libc version support, the deprecated libc4 code was +accidentally kept in `implicit_soname`, instead of the libc6 code. + +This causes additional symlinks to be created by `ldconfig` for libraries +without a soname, e.g. a library `libsomething.123.456.789` without a soname +will create a `libsomething.123` -> `libsomething.123.456.789` symlink. + +As the libc6 version of the `implicit_soname` code is a trivial `xstrdup`, +just inline it and remove `implicit_soname` altogether. + +Some further simplification looks possible (e.g. the call to `create_links` +looks like a no-op if `soname == NULL`, other than the verbose printfs), but +logic is kept as-is for now. + +Fixes: BZ #30125 +Fixes: 8ee878592c4a ("Assume only FLAG_ELF_LIBC6 suport") +Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com> + +Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> +--- +Rebased-by: laokz <zhangkai@iscas.ac.cn> +--- + elf/Makefile | 14 ++++++ + elf/ldconfig.c | 4 +- + elf/readlib.c | 19 -------- + elf/tst-ldconfig-soname-lib-with-soname.c | 1 + + elf/tst-ldconfig-soname-lib-without-soname.c | 1 + + elf/tst-ldconfig-soname.sh | 49 ++++++++++++++++++++ + sysdeps/generic/ldconfig.h | 2 - + 7 files changed, 67 insertions(+), 23 deletions(-) + create mode 100644 elf/tst-ldconfig-soname-lib-with-soname.c + create mode 100644 elf/tst-ldconfig-soname-lib-without-soname.c + create mode 100644 elf/tst-ldconfig-soname.sh + +diff --git a/elf/Makefile b/elf/Makefile +index 2fc6391183..0d19964d42 100644 +--- a/elf/Makefile ++++ b/elf/Makefile +@@ -627,6 +627,7 @@ ifeq ($(run-built-tests),yes) + tests-special += \ + $(objpfx)noload-mem.out \ + $(objpfx)tst-ldconfig-X.out \ ++ $(objpfx)tst-ldconfig-soname.out \ + $(objpfx)tst-leaks1-mem.out \ + $(objpfx)tst-rtld-help.out \ + # tests-special +@@ -859,6 +860,8 @@ modules-names += \ + tst-initorderb2 \ + tst-latepthreadmod \ + tst-ldconfig-ld-mod \ ++ tst-ldconfig-soname-lib-with-soname \ ++ tst-ldconfig-soname-lib-without-soname \ + tst-main1mod \ + tst-nodelete2mod \ + tst-nodelete-dlclose-dso \ +@@ -2402,6 +2405,17 @@ $(objpfx)tst-ldconfig-p.out : tst-ldconfig-p.sh $(objpfx)ldconfig + '$(run-program-env)' > $@; \ + $(evaluate-test) + ++LDFLAGS-tst-ldconfig-soname-lib-with-soname.so = \ ++ -Wl,-soname,libtst-ldconfig-soname-lib-with-soname.so.1 ++ ++$(objpfx)tst-ldconfig-soname.out : tst-ldconfig-soname.sh \ ++ $(objpfx)ldconfig \ ++ $(objpfx)tst-ldconfig-soname-lib-with-soname.so \ ++ $(objpfx)tst-ldconfig-soname-lib-without-soname.so ++ $(SHELL) $< '$(common-objpfx)' '$(test-wrapper-env)' \ ++ '$(run-program-env)' > $@; \ ++ $(evaluate-test) ++ + # Test static linking of all the libraries we can possibly link + # together. Note that in some configurations this may be less than the + # complete list of libraries we build but we try to maxmimize this list. +diff --git a/elf/ldconfig.c b/elf/ldconfig.c +index 3f1b30c570..2fc45ad825 100644 +--- a/elf/ldconfig.c ++++ b/elf/ldconfig.c +@@ -616,7 +616,7 @@ manual_link (char *library) + goto out; + } + if (soname == NULL) +- soname = implicit_soname (libname, flag); ++ soname = xstrdup (libname); + create_links (real_path, path, libname, soname); + free (soname); + out: +@@ -849,7 +849,7 @@ search_dir (const struct dir_entry *entry) + } + + if (soname == NULL) +- soname = implicit_soname (direntry->d_name, flag); ++ soname = xstrdup (direntry->d_name); + + /* A link may just point to itself. */ + if (is_link) +diff --git a/elf/readlib.c b/elf/readlib.c +index c5c3591eef..bc13d9acc6 100644 +--- a/elf/readlib.c ++++ b/elf/readlib.c +@@ -166,24 +166,5 @@ process_file (const char *real_file_name, const char *file_name, + return ret; + } + +-/* Returns made up soname if lib doesn't have explicit DT_SONAME. */ +- +-char * +-implicit_soname (const char *lib, int flag) +-{ +- char *soname = xstrdup (lib); +- +- /* Aout files don't have a soname, just return the name +- including the major number. */ +- char *major = strstr (soname, ".so."); +- if (major) +- { +- char *dot = strstr (major + 4, "."); +- if (dot) +- *dot = '\0'; +- } +- return soname; +-} +- + /* Get architecture specific version of process_elf_file. */ + #include <readelflib.c> +diff --git a/elf/tst-ldconfig-soname-lib-with-soname.c b/elf/tst-ldconfig-soname-lib-with-soname.c +new file mode 100644 +index 0000000000..d1ab56ad58 +--- /dev/null ++++ b/elf/tst-ldconfig-soname-lib-with-soname.c +@@ -0,0 +1 @@ ++/* This file intentionally left blank */ +diff --git a/elf/tst-ldconfig-soname-lib-without-soname.c b/elf/tst-ldconfig-soname-lib-without-soname.c +new file mode 100644 +index 0000000000..d1ab56ad58 +--- /dev/null ++++ b/elf/tst-ldconfig-soname-lib-without-soname.c +@@ -0,0 +1 @@ ++/* This file intentionally left blank */ +diff --git a/elf/tst-ldconfig-soname.sh b/elf/tst-ldconfig-soname.sh +new file mode 100644 +index 0000000000..406f526dbf +--- /dev/null ++++ b/elf/tst-ldconfig-soname.sh +@@ -0,0 +1,49 @@ ++#!/bin/sh ++# Test that ldconfig creates symlinks according to the library's soname ++# (and in particular, does not create symlinks for libraries without a soname) ++# Copyright (C) 2000-2023 Free Software Foundation, Inc. ++# Copyright The GNU Toolchain Authors. ++# 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/>. ++ ++set -ex ++ ++common_objpfx=$1 ++test_wrapper_env=$2 ++run_program_env=$3 ++ ++testroot="${common_objpfx}elf/bug30125-test-directory" ++cleanup () { ++ rm -rf "$testroot" ++} ++trap cleanup 0 ++ ++rm -rf "$testroot" ++mkdir -p $testroot/lib ++cp "${common_objpfx}elf/tst-ldconfig-soname-lib-with-soname.so" \ ++ $testroot/lib/libtst-ldconfig-soname-lib-with-soname.so.1.2.3 ++cp "${common_objpfx}elf/tst-ldconfig-soname-lib-without-soname.so" \ ++ $testroot/lib/libtst-ldconfig-soname-lib-without-soname.so.1.2.3 ++ ++${test_wrapper_env} \ ++${run_program_env} \ ++${common_objpfx}elf/ldconfig -vn $testroot/lib ++ ++LINKS=$(cd $testroot/lib && find . -type l) ++if "$LINKS" != "./libtst-ldconfig-soname-lib-with-soname.so.1" ; then ++ echo "error: $0 - extra symlinks found" ++ exit 1 ++fi +diff --git a/sysdeps/generic/ldconfig.h b/sysdeps/generic/ldconfig.h
View file
_service:tar_scm:stdlib-strfrom-Add-copysign-to-fix-NAN-issue-on-risc.patch
Added
@@ -0,0 +1,176 @@ +From 0cc0033ef19bd3378445c2b851e53d7255cb1b1e Mon Sep 17 00:00:00 2001 +From: Letu Ren <fantasquex@gmail.com> +Date: Fri, 21 Oct 2022 22:54:50 +0800 +Subject: PATCH stdlib/strfrom: Add copysign to fix NAN issue on riscv (BZ + #29501) +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +According to the specification of ISO/IEC TS 18661-1:2014, + +The strfromd, strfromf, and strfroml functions are equivalent to +snprintf(s, n, format, fp) (7.21.6.5), except the format string contains only +the character %, an optional precision that does not contain an asterisk *, and +one of the conversion specifiers a, A, e, E, f, F, g, or G, which applies to +the type (double, float, or long double) indicated by the function suffix +(rather than by a length modifier). Use of these functions with any other 20 +format string results in undefined behavior. + +strfromf will convert the arguement with type float to double first. + +According to the latest version of IEEE754 which is published in 2019, + +Conversion of a quiet NaN from a narrower format to a wider format in the same +radix, and then back to the same narrower format, should not change the quiet +NaN payload in any way except to make it canonical. + +When either an input or result is a NaN, this standard does not interpret the +sign of a NaN. However, operations on bit strings—copy, negate, abs, +copySign—specify the sign bit of a NaN result, sometimes based upon the sign +bit of a NaN operand. The logical predicates totalOrder and isSignMinus are +also affected by the sign bit of a NaN operand. For all other operations, this +standard does not specify the sign bit of a NaN result, even when there is only +one input NaN, or when the NaN is produced from an invalid operation. + +converting NAN or -NAN with type float to double doesn't need to keep +the signbit. As a result, this test case isn't mandatory. + +The problem is that according to RISC-V ISA manual in chapter 11.3 of +riscv-isa-20191213, + +Except when otherwise stated, if the result of a floating-point operation is +NaN, it is the canonical NaN. The canonical NaN has a positive sign and all +significand bits clear except the MSB, a.k.a. the quiet bit. For +single-precision floating-point, this corresponds to the pattern 0x7fc00000. + +which means that conversion -NAN from float to double won't keep the signbit. + +Since glibc ought to be consistent here between types and architectures, this +patch adds copysign to fix this problem if the string is NAN. This patch +adds two different functions under sysdeps directory to work around the +issue. + +This patch has been tested on x86_64 and riscv64. + +Resolves: BZ #29501 + +v2: Change from macros to different inline functions. +v3: Add unlikely check to isnan. +v4: Fix wrong commit message header. +v5: Fix style: add space before parentheses. +v6: Add copyright. +Signed-off-by: Letu Ren <fantasquex@gmail.com> +Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> +--- + stdlib/strfrom-skeleton.c | 3 +- + .../generic/fix-float-double-convert-nan.h | 31 ++++++++++++++++ + .../riscv/rvd/fix-float-double-convert-nan.h | 37 +++++++++++++++++++ + 3 files changed, 70 insertions(+), 1 deletion(-) + create mode 100644 sysdeps/generic/fix-float-double-convert-nan.h + create mode 100644 sysdeps/riscv/rvd/fix-float-double-convert-nan.h + +diff --git a/stdlib/strfrom-skeleton.c b/stdlib/strfrom-skeleton.c +index 1fba04bf6a..36e9adcad5 100644 +--- a/stdlib/strfrom-skeleton.c ++++ b/stdlib/strfrom-skeleton.c +@@ -27,6 +27,7 @@ + #include <printf.h> + #include <string.h> + #include <locale/localeinfo.h> ++#include <fix-float-double-convert-nan.h> + + #define UCHAR_T char + #define L_(Str) Str +@@ -61,7 +62,7 @@ STRFROM (char *dest, size_t size, const char *format, FLOAT f) + because __printf_fp and __printf_fphex only accept double and long double + as the floating-point argument. */ + if (__builtin_types_compatible_p (FLOAT, float)) +- fpnum.flt = f; ++ fpnum.flt = keep_sign_conversion (f); + else + fpnum.value = f; + +diff --git a/sysdeps/generic/fix-float-double-convert-nan.h b/sysdeps/generic/fix-float-double-convert-nan.h +new file mode 100644 +index 0000000000..66692262fc +--- /dev/null ++++ b/sysdeps/generic/fix-float-double-convert-nan.h +@@ -0,0 +1,31 @@ ++/* Fix for conversion of float NAN to double. Generic version. ++ Copyright (C) 2022 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/>. */ ++ ++#ifndef FIX_FLOAT_DOUBLE_CONVERT_NAN_H ++#define FIX_FLOAT_DOUBLE_CONVERT_NAN_H ++ ++/* This function aims to work around conversions of float -NAN ++ to double returning NAN instead of the correct -NAN in some ++ architectures. */ ++static inline double __attribute__ ((always_inline)) ++keep_sign_conversion (float flt) ++{ ++ return flt; ++} ++ ++#endif +diff --git a/sysdeps/riscv/rvd/fix-float-double-convert-nan.h b/sysdeps/riscv/rvd/fix-float-double-convert-nan.h +new file mode 100644 +index 0000000000..cab003f3c1 +--- /dev/null ++++ b/sysdeps/riscv/rvd/fix-float-double-convert-nan.h +@@ -0,0 +1,37 @@ ++/* Fix for conversion of float NAN to double. RISC-V version.. ++ Copyright (C) 2022 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/>. */ ++ ++#ifndef FIX_FLOAT_DOUBLE_CONVERT_NAN_H ++#define FIX_FLOAT_DOUBLE_CONVERT_NAN_H ++ ++#include <math.h> ++ ++/* RISC-V rvd instructions do not preserve the signbit of NAN ++ when converting from float to double. */ ++static inline double ++keep_sign_conversion (float flt) ++{ ++ if (__glibc_unlikely (isnan (flt))) ++ { ++ float x = copysignf (1.f, flt); ++ return copysign ((double) flt, (double) x); ++ } ++ return flt; ++} ++ ++#endif +-- +2.39.2 +
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