From bfa4952f31049a1bc7140047eb66fa6280764e66 Mon Sep 17 00:00:00 2001 From: NIIBE Yutaka Date: Tue, 5 Jun 2012 10:33:50 +0900 Subject: [PATCH] use RBIT instruction of Thumb-2 --- ChangeLog | 9 ++++++ regnual/regnual.c | 15 ++++++++-- src/usb_ctrl.c | 8 ++--- tool/gnuk_upgrade.py | 71 ++++---------------------------------------- 4 files changed, 31 insertions(+), 72 deletions(-) diff --git a/ChangeLog b/ChangeLog index 3147a15..e0a4d49 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,12 @@ +2012-06-05 Niibe Yutaka + + Take advantage of the Thumb-2 "rbit" instruction. + * regnual/regnual.c (fetch): Reverse bits. + * src/usb_ctrl.c (rbit): New. Deleted reverse32. + (download_check_crc32): Use rbit. + * tool/gnuk_upgrade.py (crc32): Just use binascii.crc32. + (crctab): Remove. + 2012-06-04 Niibe Yutaka Card holder certificate data object bug fixes. diff --git a/regnual/regnual.c b/regnual/regnual.c index eecf698..7534e4c 100644 --- a/regnual/regnual.c +++ b/regnual/regnual.c @@ -147,14 +147,23 @@ static uint32_t result; static const uint8_t *const mem_info[] = { &_flash_start, &_flash_end, }; -static uint32_t fetch (int i) +static uint32_t rbit (uint32_t v) { uint32_t r; - r = (mem[i*4] << 24) | (mem[i*4+1] << 16) | (mem[i*4+2] << 8) | mem[i*4+3]; + asm ("rbit %0, %1" : "=r" (r) : "r" (v)); return r; } +static uint32_t fetch (int i) +{ + uint32_t v; + + v = (mem[i*4+3] << 24) | (mem[i*4+2] << 16) | (mem[i*4+1] << 8) | mem[i*4]; + + return rbit (v); +} + struct CRC { __IO uint32_t DR; __IO uint8_t IDR; @@ -174,7 +183,7 @@ static uint32_t calc_crc32 (void) for (i = 0; i < 256/4; i++) CRC->DR = fetch (i); - return CRC->DR; + return rbit (CRC->DR); } diff --git a/src/usb_ctrl.c b/src/usb_ctrl.c index f43f229..4609f01 100644 --- a/src/usb_ctrl.c +++ b/src/usb_ctrl.c @@ -188,11 +188,11 @@ static const uint8_t *const mem_info[] = { &_regnual_start, &__heap_end__, }; #define USB_FSIJ_GNUK_DOWNLOAD 1 #define USB_FSIJ_GNUK_EXEC 2 -static uint32_t reverse32 (uint32_t v) +static uint32_t rbit (uint32_t v) { uint32_t r; - r = (v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24); + asm ("rbit %0, %1" : "=r" (r) : "r" (v)); return r; } @@ -206,9 +206,9 @@ static int download_check_crc32 (const uint32_t *end_p) CRC->CR = CRC_CR_RESET; for (p = (const uint32_t *)&_regnual_start; p < end_p; p++) - CRC->DR = reverse32 (*p); + CRC->DR = rbit (*p); - if ((CRC->DR ^ crc32) == 0xffffffff) + if ((rbit (CRC->DR) ^ crc32) == 0xffffffff) return USB_SUCCESS; return USB_UNSUPPORT; diff --git a/tool/gnuk_upgrade.py b/tool/gnuk_upgrade.py index 18ed48b..b03cdef 100755 --- a/tool/gnuk_upgrade.py +++ b/tool/gnuk_upgrade.py @@ -83,7 +83,7 @@ class regnual: value = 0, index = 0, buffer = data[j*256:j*256+256], timeout = 10000) - crc32code = crc32(data[j*256:j*256+256], 0xffffffff) + crc32code = crc32(data[j*256:j*256+256]) res = self.__devhandle.controlMsg(requestType = 0xc0, request = 2, value = 0, index = 0, buffer = 4, timeout = 10000) @@ -111,7 +111,7 @@ class regnual: value = 0, index = 0, buffer = data[j*256:], timeout = 10000) - crc32code = crc32(data[j*256:].ljust(256,chr(255)), 0xffffffff) + crc32code = crc32(data[j*256:].ljust(256,chr(255))) res = self.__devhandle.controlMsg(requestType = 0xc0, request = 2, value = 0, index = 0, buffer = 4, timeout = 10000) @@ -411,77 +411,18 @@ def gpg_sign(keygrip, hash): raise ValueError, binascii.hexlify(signed) return signed -crctab = [ 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, - 0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, - 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, - 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, - 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, - 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, - 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, - 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, - 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, - 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, - 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, - 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, - 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, - 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, - 0x2e003dc5, 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, - 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, - 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, - 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, - 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, - 0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, - 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, - 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, - 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, - 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, - 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, - 0xd1799b34, 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, - 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, - 0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, - 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, - 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, - 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, - 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, - 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, - 0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, - 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, - 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, - 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, - 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, - 0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, - 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, - 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, - 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, - 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, - 0x0fdc1bec, 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, - 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, - 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, - 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, - 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, - 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, - 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, - 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, - 0xb1f740b4 ] - def UNSIGNED(n): return n & 0xffffffff -# (1) Alas, zlib.crc32 (== binascii.crc32) uses same polynomial, but in a -# different way of endian-ness. -# (2) POSIX cksum command uses same calculation, but the initial value -# is different. -def crc32(bytestr, crc): - for b in bytestr: - idx = (crc>>24)^ord(b) - crc = UNSIGNED((crc << 8)) ^ crctab[idx] - return UNSIGNED(~crc) +def crc32(bytestr): + crc = binascii.crc32(bytestr) + return UNSIGNED(crc) def main(keygrip, data_regnual, data_upgrade): l = len(data_regnual) if (l & 0x03) != 0: data_regnual = data_regnual.ljust(l + 4 - (l & 0x03), chr(0)) - crc32code = crc32(data_regnual, 0xffffffff) + crc32code = crc32(data_regnual) print "CRC32: %04x\n" % crc32code data_regnual += pack('