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Sat, 17 Dec 2022 08:52:58 -0800 (PST) From: Yonggang Luo To: elfutils-devel@sourceware.org Cc: Yonggang Luo Subject: [PATCH v2 14/16] Add function sys_get_page_size to replace platform dependent sysconf (_SC_PAGESIZE) Date: Sun, 18 Dec 2022 00:52:11 +0800 Message-Id: <20221217165213.152-15-luoyonggang@gmail.com> X-Mailer: git-send-email 2.36.1.windows.1 In-Reply-To: <20221217165213.152-1-luoyonggang@gmail.com> References: <20221217165213.152-1-luoyonggang@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-11.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,GIT_PATCH_0,KAM_SHORT,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Signed-off-by: Yonggang Luo --- lib/Makefile.am | 2 +- lib/crc32_file.c | 2 +- lib/system.c | 48 ++++++++++++++++++++++++++++++++++ lib/system.h | 3 +++ libdw/dwarf_begin_elf.c | 2 +- libdwelf/dwelf_strtab.c | 2 +- libdwfl/linux-kernel-modules.c | 2 +- libdwfl/linux-proc-maps.c | 2 +- libelf/elf32_updatefile.c | 2 +- src/ar.c | 2 +- src/ranlib.c | 2 +- src/strings.c | 2 +- 12 files changed, 61 insertions(+), 10 deletions(-) create mode 100644 lib/system.c diff --git a/lib/Makefile.am b/lib/Makefile.am index 42ddf5ae..7a50085b 100644 --- a/lib/Makefile.am +++ b/lib/Makefile.am @@ -35,7 +35,7 @@ noinst_LIBRARIES =3D libeu.a =20 libeu_a_SOURCES =3D xasprintf.c xstrdup.c xstrndup.c xmalloc.c next_prime.= c \ crc32.c crc32_file.c \ - color.c error.c printversion.c + color.c error.c printversion.c system.c =20 noinst_HEADERS =3D fixedsizehash.h libeu.h system.h dynamicsizehash.h list= .h \ eu-config.h color.h printversion.h bpf.h \ diff --git a/lib/crc32_file.c b/lib/crc32_file.c index 66833702..45e1cc52 100644 --- a/lib/crc32_file.c +++ b/lib/crc32_file.c @@ -52,7 +52,7 @@ crc32_file (int fd, uint32_t *resp) void *mapped =3D mmap (NULL, mapsize, PROT_READ, MAP_PRIVATE, fd, 0); if (mapped =3D=3D MAP_FAILED && errno =3D=3D ENOMEM) { - const size_t pagesize =3D sysconf (_SC_PAGESIZE); + const size_t pagesize =3D sys_get_page_size(); mapsize =3D ((mapsize / 2) + pagesize - 1) & -pagesize; while (mapsize >=3D pagesize && (mapped =3D mmap (NULL, mapsize, PROT_READ, MAP_PRIVATE, diff --git a/lib/system.c b/lib/system.c new file mode 100644 index 00000000..bd3831f5 --- /dev/null +++ b/lib/system.c @@ -0,0 +1,48 @@ +/* Definitions for system functions.=0D + Copyright (C) 2006-2011 Red Hat, Inc.=0D + Copyright (C) 2022 Mark J. Wielaard =0D + Copyright (C) 2022 Yonggang Luo =0D + This file is part of elfutils.=0D +=0D + This file is free software; you can redistribute it and/or modify=0D + it under the terms of either=0D +=0D + * the GNU Lesser General Public License as published by the Free=0D + Software Foundation; either version 3 of the License, or (at=0D + your option) any later version=0D +=0D + or=0D +=0D + * the GNU General Public License as published by the Free=0D + Software Foundation; either version 2 of the License, or (at=0D + your option) any later version=0D +=0D + or both in parallel, as here.=0D +=0D + elfutils is distributed in the hope that it will be useful, but=0D + WITHOUT ANY WARRANTY; without even the implied warranty of=0D + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU=0D + General Public License for more details.=0D +=0D + You should have received copies of the GNU General Public License and=0D + the GNU Lesser General Public License along with this program. If=0D + not, see . */=0D +=0D +#include =0D +=0D +#include "system.h"=0D +#if defined(_WIN32)=0D +#include =0D +#endif=0D +=0D +size_t=0D +sys_get_page_size(void)=0D +{=0D +#ifdef _WIN32=0D + SYSTEM_INFO info;=0D + GetSystemInfo(&info);=0D + return info.dwPageSize;=0D +#else=0D + return sysconf (_SC_PAGESIZE);=0D +#endif=0D +}=0D diff --git a/lib/system.h b/lib/system.h index 7f9f2a91..c84c416c 100644 --- a/lib/system.h +++ b/lib/system.h @@ -200,6 +200,9 @@ pread_retry (int fd, void *buf, size_t len, off_t off) return recvd; } =20 +size_t +sys_get_page_size(void); + /* The demangler from libstdc++. */ extern char *__cxa_demangle (const char *mangled_name, char *output_buffer, size_t *length, int *status); diff --git a/libdw/dwarf_begin_elf.c b/libdw/dwarf_begin_elf.c index 8fcef335..0f13e2f5 100644 --- a/libdw/dwarf_begin_elf.c +++ b/libdw/dwarf_begin_elf.c @@ -502,7 +502,7 @@ dwarf_begin_elf (Elf *elf, Dwarf_Cmd cmd, Elf_Scn *scng= rp) =20 =20 /* Default memory allocation size. */ - size_t mem_default_size =3D sysconf (_SC_PAGESIZE) - 4 * sizeof (void *); + size_t mem_default_size =3D sys_get_page_size() - 4 * sizeof (void *); assert (sizeof (struct Dwarf) < mem_default_size); =20 /* Allocate the data structure. */ diff --git a/libdwelf/dwelf_strtab.c b/libdwelf/dwelf_strtab.c index c95f9467..293b2d93 100644 --- a/libdwelf/dwelf_strtab.c +++ b/libdwelf/dwelf_strtab.c @@ -86,7 +86,7 @@ dwelf_strtab_init (bool nullstr) { if (ps =3D=3D 0) { - ps =3D sysconf (_SC_PAGESIZE); + ps =3D sys_get_page_size(); assert (sizeof (struct memoryblock) < ps - MALLOC_OVERHEAD); } =20 diff --git a/libdwfl/linux-kernel-modules.c b/libdwfl/linux-kernel-modules.c index 58c0c417..65a58616 100644 --- a/libdwfl/linux-kernel-modules.c +++ b/libdwfl/linux-kernel-modules.c @@ -550,7 +550,7 @@ intuit_kernel_bounds (Dwarf_Addr *start, Dwarf_Addr *en= d, Dwarf_Addr *notes) *notes =3D *end; } =20 - Dwarf_Addr round_kernel =3D sysconf (_SC_PAGESIZE); + Dwarf_Addr round_kernel =3D sys_get_page_size(); *start &=3D -(Dwarf_Addr) round_kernel; *end +=3D round_kernel - 1; *end &=3D -(Dwarf_Addr) round_kernel; diff --git a/libdwfl/linux-proc-maps.c b/libdwfl/linux-proc-maps.c index 719cba68..40b8050b 100644 --- a/libdwfl/linux-proc-maps.c +++ b/libdwfl/linux-proc-maps.c @@ -422,7 +422,7 @@ dwfl_linux_proc_find_elf (Dwfl_Module *mod __attribute_= _ ((unused)), if (fd < 0) goto detach; =20 - *elfp =3D elf_from_remote_memory (base, sysconf (_SC_PAGESIZE), NULL, + *elfp =3D elf_from_remote_memory (base, sys_get_page_size(), NULL, &read_proc_memory, &fd); =20 close (fd); diff --git a/libelf/elf32_updatefile.c b/libelf/elf32_updatefile.c index 8229fd26..af4518b8 100644 --- a/libelf/elf32_updatefile.c +++ b/libelf/elf32_updatefile.c @@ -474,7 +474,7 @@ __elfw2(LIBELFBITS,updatemmap) (Elf *elf, int change_bo= , size_t shnum) =20 /* Make sure the content hits the disk. */ char *msync_start =3D ((char *) elf->map_address - + (elf->start_offset & ~(sysconf (_SC_PAGESIZE) - 1))); + + (elf->start_offset & ~(sys_get_page_size() - 1))); char *msync_end =3D ((char *) elf->map_address + elf->start_offset + ehdr->e_shoff + ehdr->e_shentsize * shnum); diff --git a/src/ar.c b/src/ar.c index 3bcb18fe..d01f8482 100644 --- a/src/ar.c +++ b/src/ar.c @@ -428,7 +428,7 @@ copy_content (Elf *elf, int newfd, off_t off, size_t n) assert (off + n <=3D len); =20 /* Tell the kernel we will read all the pages sequentially. */ - size_t ps =3D sysconf (_SC_PAGESIZE); + size_t ps =3D sys_get_page_size(); if (n > 2 * ps) posix_madvise (rawfile + (off & ~(ps - 1)), n, POSIX_MADV_SEQUENTIAL); =20 diff --git a/src/ranlib.c b/src/ranlib.c index 7838d69e..645b40ae 100644 --- a/src/ranlib.c +++ b/src/ranlib.c @@ -122,7 +122,7 @@ copy_content (Elf *elf, int newfd, off_t off, size_t n) assert (off + n <=3D len); =20 /* Tell the kernel we will read all the pages sequentially. */ - size_t ps =3D sysconf (_SC_PAGESIZE); + size_t ps =3D sys_get_page_size(); if (n > 2 * ps) posix_madvise (rawfile + (off & ~(ps - 1)), n, POSIX_MADV_SEQUENTIAL); =20 diff --git a/src/strings.c b/src/strings.c index 55b047be..3341760d 100644 --- a/src/strings.c +++ b/src/strings.c @@ -163,7 +163,7 @@ main (int argc, char *argv[]) elf_version (EV_CURRENT); =20 /* Determine the page size. We will likely need it a couple of times. = */ - ps =3D sysconf (_SC_PAGESIZE); + ps =3D sys_get_page_size(); =20 struct stat st; int result =3D 0; --=20 2.36.1.windows.1