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2019-07-02libbb: reduce the overhead of single parameter bb_error_msg() callsJames Byrne
Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-24tls: speed up xor'ing of aligned 16-byte buffersDenys Vlasenko
function old new delta xorbuf_aligned_AES_BLOCK_SIZE - 23 +23 xwrite_encrypted 585 580 -5 aesgcm_GHASH 233 228 -5 GMULT 192 187 -5 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/3 up/down: 23/-15) Total: 8 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-24tls: in AES-GCM decoding, avoid memmoveDenys Vlasenko
function old new delta xorbuf3 - 36 +36 xorbuf 24 12 -12 tls_xread_record 656 634 -22 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/2 up/down: 36/-34) Total: 2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-23tls: make tls_get_random() FAST_FUNCDenys Vlasenko
function old new delta tls_handshake 1977 1985 +8 tls_get_random 32 28 -4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 8/-4) Total: 4 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-23tls: add support for TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 cipherDenys Vlasenko
function old new delta xwrite_encrypted 209 605 +396 GHASH - 395 +395 aes_encrypt_1 - 382 +382 GMULT - 192 +192 tls_xread_record 489 659 +170 aes_encrypt_one_block - 65 +65 aesgcm_setkey - 58 +58 FlattenSzInBits - 52 +52 tls_handshake 1890 1941 +51 xwrite_and_update_handshake_hash 46 81 +35 xorbuf - 24 +24 aes_setkey - 16 +16 psRsaEncryptPub 413 421 +8 stty_main 1221 1227 +6 ssl_client_main 138 143 +5 next_token 841 845 +4 spawn_ssl_client 218 219 +1 volume_id_probe_hfs_hfsplus 564 563 -1 read_package_field 232 230 -2 i2cdetect_main 674 672 -2 fail_hunk 139 136 -3 parse_expr 891 883 -8 curve25519 802 793 -9 aes_cbc_decrypt 971 958 -13 xwrite_handshake_record 43 - -43 aes_cbc_encrypt 644 172 -472 ------------------------------------------------------------------------------ (add/remove: 9/1 grow/shrink: 9/8 up/down: 1860/-553) Total: 1307 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-13tls: add support for ECDHE-ECDSA-AES-128-CBC-SHA and x25519 curveDenys Vlasenko
function old new delta curve25519 - 835 +835 tls_handshake 1619 1935 +316 xc_diffadd - 230 +230 fe_mul__distinct - 149 +149 lm_sub - 103 +103 lm_add - 82 +82 fe_mul_c - 74 +74 fe_select - 45 +45 static.f25519_one - 32 +32 static.basepoint9 - 32 +32 static.OID_ECDSA_KEY_ALG - 21 +21 static.OID_RSA_KEY_ALG - 13 +13 static.supported_groups - 8 +8 static.empty_client_cert - 7 +7 der_binary_to_pstm 40 42 +2 static.expected 13 - -13 ------------------------------------------------------------------------------ (add/remove: 14/1 grow/shrink: 2/0 up/down: 1949/-13) Total: 1936 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15tls: fix pstm asm constraint problemDenys Vlasenko
function old new delta pstm_sqr_comba 551 475 -76 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15tls: fix build problem on non-static i386Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-19tls: tested PSTM_X86_64, not enabling it - too largeDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-19tls: commented out psPool_t useDenys Vlasenko
function old new delta psAesEncrypt 159 162 +3 der_binary_to_pstm 42 40 -2 xwrite_and_hash 437 434 -3 xread_tls_block 446 443 -3 pstm_div_2d 449 444 -5 psAesDecrypt 179 174 -5 pstm_init_size 52 45 -7 pstm_init 46 39 -7 pstm_to_unsigned_bin 165 157 -8 tls_main 1265 1256 -9 pstm_mulmod 132 123 -9 pstm_mod 125 116 -9 pstm_init_copy 93 84 -9 psAesInitKey 840 825 -15 send_client_key_exchange 362 342 -20 psAesInit 103 80 -23 psRsaEncryptPub 429 403 -26 psAesDecryptBlock 1211 1184 -27 psAesEncryptBlock 1223 1193 -30 pstm_exptmod 1582 1524 -58 pstm_div 1557 1472 -85 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/20 up/down: 3/-360) Total: -357 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-18tls: added AES code and made it compile. not used yetDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-16tls: add sha256 hmac and prf codeDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15tls: format and send CLIENT_KEY_EXCHANGEDenys Vlasenko
$ ./busybox tls kernel.org insize:0 tail:0 got block len:74 got HANDSHAKE got SERVER_HELLO insize:79 tail:4265 got block len:4392 got HANDSHAKE got CERTIFICATE entered der @0x8b217a7:0x30 len:1452 inner_byte @0x8b217ab:0x30 entered der @0x8b217ab:0x30 len:1172 inner_byte @0x8b217af:0xa0 skipped der 0xa0, next byte 0x02 skipped der 0x02, next byte 0x30 skipped der 0x30, next byte 0x30 skipped der 0x30, next byte 0x30 skipped der 0x30, next byte 0x30 skipped der 0x30, next byte 0x30 entered der @0x8b218b4:0x30 len:418 inner_byte @0x8b218b8:0x30 skipped der 0x30, next byte 0x03 entered der @0x8b218c7:0x03 len:399 inner_byte @0x8b218cb:0x00 key bytes:399, first:0x00 entered der @0x8b218cc:0x30 len:394 inner_byte @0x8b218d0:0x02 binary bytes:385, first:0x00 skipped der 0x02, next byte 0x02 binary bytes:3, first:0x01 server_rsa_pub_key.size:384 insize:4397 tail:9 got block len:4 got SERVER_HELLO_DONE insize:9 tail:0 ^C Next step: send CHANGE_CIPHER_SPEC... and actually implement it. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-15 20:21:09 +0000