From: Denys Vlasenko Date: Wed, 1 Sep 2010 10:01:17 +0000 (+0200) Subject: better shared strings trick X-Git-Tag: 1_18_0~287 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=0004e994934374b5695e004bbcb7b1fd67a170f2;p=oweals%2Fbusybox.git better shared strings trick text data bss dec hex filename 861980 441 7540 869961 d4649 busybox_old 861914 441 7540 869895 d4607 busybox_unstripped Signed-off-by: Denys Vlasenko --- diff --git a/include/libbb.h b/include/libbb.h index 6fb0438f5..4b69c855f 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -1573,12 +1573,22 @@ void bb_progress_update(bb_progress_t *p, const char *curfile, off_t totalsize) FAST_FUNC; extern const char *applet_name; + +/* Some older linkers don't perform string merging, we used to have common strings + * as global arrays to do it by hand. But: + * (1) newer linkers do it themselves, + * (2) however, they DONT merge string constants with global arrays, + * even if the value is the same (!). Thus global arrays actually + * increased size a bit: for example, "/etc/passwd" string from libc + * wasn't merged with bb_path_passwd_file[] array! + * Therefore now we use #defines. + */ /* "BusyBox vN.N.N (timestamp or extra_version)" */ extern const char bb_banner[]; extern const char bb_msg_memory_exhausted[]; extern const char bb_msg_invalid_date[]; -extern const char bb_msg_read_error[]; -extern const char bb_msg_write_error[]; +#define bb_msg_read_error "read error" +#define bb_msg_write_error "write error" extern const char bb_msg_unknown[]; extern const char bb_msg_can_not_create_raw_socket[]; extern const char bb_msg_perm_denied_are_you_root[]; @@ -1588,18 +1598,23 @@ extern const char bb_msg_invalid_arg[]; extern const char bb_msg_standard_input[]; extern const char bb_msg_standard_output[]; -extern const char bb_str_default[]; /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */ extern const char bb_hexdigits_upcase[]; -extern const char bb_path_mtab_file[]; -extern const char bb_path_passwd_file[]; -extern const char bb_path_shadow_file[]; -extern const char bb_path_gshadow_file[]; -extern const char bb_path_group_file[]; -extern const char bb_path_motd_file[]; extern const char bb_path_wtmp_file[]; -extern const char bb_dev_null[]; + +/* Busybox mount uses either /proc/mounts or /etc/mtab to + * get the list of currently mounted filesystems */ +#define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts") + +#define bb_path_passwd_file "/etc/passwd" +#define bb_path_shadow_file "/etc/shadow" +#define bb_path_gshadow_file "/etc/gshadow" +#define bb_path_group_file "/etc/group" + +#define bb_path_motd_file "/etc/motd" + +#define bb_dev_null "/dev/null" extern const char bb_busybox_exec_path[]; /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin, * but I want to save a few bytes here */ diff --git a/libbb/Kbuild.src b/libbb/Kbuild.src index 5db4d8a62..b02fcfe74 100644 --- a/libbb/Kbuild.src +++ b/libbb/Kbuild.src @@ -64,7 +64,6 @@ lib-y += md5.o #lib-y += md5prime.o lib-y += messages.o lib-y += mode_string.o -lib-y += mtab_file.o lib-y += obscure.o lib-y += parse_mode.o lib-y += parse_config.o diff --git a/libbb/inet_common.c b/libbb/inet_common.c index b47259089..e031ddf9b 100644 --- a/libbb/inet_common.c +++ b/libbb/inet_common.c @@ -23,7 +23,7 @@ int FAST_FUNC INET_resolve(const char *name, struct sockaddr_in *s_in, int hostf s_in->sin_port = 0; /* Default is special, meaning 0.0.0.0. */ - if (!strcmp(name, bb_str_default)) { + if (strcmp(name, "default") == 0) { s_in->sin_addr.s_addr = INADDR_ANY; return 1; } @@ -109,7 +109,7 @@ char* FAST_FUNC INET_rresolve(struct sockaddr_in *s_in, int numeric, uint32_t ne if (ad == INADDR_ANY) { if ((numeric & 0x0FFF) == 0) { if (numeric & 0x8000) - return xstrdup(bb_str_default); + return xstrdup("default"); return xstrdup("*"); } } @@ -205,7 +205,7 @@ char* FAST_FUNC INET6_rresolve(struct sockaddr_in6 *sin6, int numeric) } if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { if (numeric & 0x8000) - return xstrdup(bb_str_default); + return xstrdup("default"); return xstrdup("*"); } diff --git a/libbb/messages.c b/libbb/messages.c index 44b39942f..66e466ffa 100644 --- a/libbb/messages.c +++ b/libbb/messages.c @@ -24,8 +24,6 @@ const char bb_banner[] ALIGN1 = BANNER; const char bb_msg_memory_exhausted[] ALIGN1 = "memory exhausted"; const char bb_msg_invalid_date[] ALIGN1 = "invalid date '%s'"; -const char bb_msg_write_error[] ALIGN1 = "write error"; -const char bb_msg_read_error[] ALIGN1 = "read error"; const char bb_msg_unknown[] ALIGN1 = "(unknown)"; const char bb_msg_can_not_create_raw_socket[] ALIGN1 = "can't create raw socket"; const char bb_msg_perm_denied_are_you_root[] ALIGN1 = "permission denied (are you root?)"; @@ -35,15 +33,8 @@ const char bb_msg_invalid_arg[] ALIGN1 = "invalid argument '%s' to '%s'"; const char bb_msg_standard_input[] ALIGN1 = "standard input"; const char bb_msg_standard_output[] ALIGN1 = "standard output"; -const char bb_str_default[] ALIGN1 = "default"; const char bb_hexdigits_upcase[] ALIGN1 = "0123456789ABCDEF"; -const char bb_path_passwd_file[] ALIGN1 = "/etc/passwd"; -const char bb_path_shadow_file[] ALIGN1 = "/etc/shadow"; -const char bb_path_group_file[] ALIGN1 = "/etc/group"; -const char bb_path_gshadow_file[] ALIGN1 = "/etc/gshadow"; -const char bb_path_motd_file[] ALIGN1 = "/etc/motd"; -const char bb_dev_null[] ALIGN1 = "/dev/null"; const char bb_busybox_exec_path[] ALIGN1 = CONFIG_BUSYBOX_EXEC_PATH; const char bb_default_login_shell[] ALIGN1 = LIBBB_DEFAULT_LOGIN_SHELL; /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin, diff --git a/libbb/mtab_file.c b/libbb/mtab_file.c deleted file mode 100644 index add990ded..000000000 --- a/libbb/mtab_file.c +++ /dev/null @@ -1,15 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Utility routines. - * - * Copyright (C) 1999-2004 by Erik Andersen - * - * Licensed under GPLv2 or later, see file LICENSE in this source tree. - */ - -#include "libbb.h" - -/* Busybox mount uses either /proc/mounts or /etc/mtab to - * get the list of currently mounted filesystems */ -const char bb_path_mtab_file[] ALIGN1 = -IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts"); diff --git a/networking/ifconfig.c b/networking/ifconfig.c index 853910f67..da2635ce0 100644 --- a/networking/ifconfig.c +++ b/networking/ifconfig.c @@ -370,7 +370,7 @@ int ifconfig_main(int argc UNUSED_PARAM, char **argv) #endif sai.sin_family = AF_INET; sai.sin_port = 0; - if (!strcmp(host, bb_str_default)) { + if (strcmp(host, "default") == 0) { /* Default is special, meaning 0.0.0.0. */ sai.sin_addr.s_addr = INADDR_ANY; } diff --git a/networking/libiproute/utils.c b/networking/libiproute/utils.c index 5125617c7..2b646f0ea 100644 --- a/networking/libiproute/utils.c +++ b/networking/libiproute/utils.c @@ -64,7 +64,7 @@ int get_addr_1(inet_prefix *addr, char *name, int family) { memset(addr, 0, sizeof(*addr)); - if (strcmp(name, bb_str_default) == 0 + if (strcmp(name, "default") == 0 || strcmp(name, "all") == 0 || strcmp(name, "any") == 0 ) { @@ -103,7 +103,7 @@ static int get_prefix_1(inet_prefix *dst, char *arg, int family) memset(dst, 0, sizeof(*dst)); - if (strcmp(arg, bb_str_default) == 0 + if (strcmp(arg, "default") == 0 || strcmp(arg, "all") == 0 || strcmp(arg, "any") == 0 ) { diff --git a/networking/route.c b/networking/route.c index c72e9457f..98567aaee 100644 --- a/networking/route.c +++ b/networking/route.c @@ -185,7 +185,7 @@ static NOINLINE void INET_setroute(int action, char **args) #endif } else { /* Default netmask. */ - netmask = bb_str_default; + netmask = "default"; } /* Prefer hostname lookup is -host flag (xflag==1) was given. */ isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst, @@ -346,7 +346,7 @@ static NOINLINE void INET6_setroute(int action, char **args) /* We know args isn't NULL from the check in route_main. */ const char *target = *args++; - if (strcmp(target, bb_str_default) == 0) { + if (strcmp(target, "default") == 0) { prefix_len = 0; memset(&sa6, 0, sizeof(sa6)); } else {