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3201 Commits

Author SHA1 Message Date
Denys Vlasenko
9b6f44e040 style fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-05-01 17:06:00 +02:00
Denys Vlasenko
002d6ee46d ifplugd: split -a into -a and -A, latter disables upping in iface creation 
-a meant both "don't up iface before each link detection" and "don't up iface
when it newly appears". But they are not the same.

I have a dock station where eth1 appears when I attach the notebook to it
(looks like it's hanging off a USB bus). IOW: appearance of this interface
is functionally equivalent to attaching ethernet cable.
ifplugd meant to be able to *automatically* handle this case.
Currently, with -a, it couldn't: newly appearing iface stayed down,
user had to manually up it.

function                                             old     new   delta
packed_usage                                       34253   34296     +43
.rodata                                           104876  104877      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 44/0)               Total: 44 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-04-30 14:33:14 +02:00
Denys Vlasenko
987be932ed *: slap on a few ALIGN_PTR where appropriate 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-02-06 20:07:12 +01:00
Denys Vlasenko
ca466f385a *: slap on a few ALIGN* where appropriate 
The result of looking at "grep -F -B2 '*fill*' busybox_unstripped.map"

function                                             old     new   delta
.rodata                                           108586  108460    -126
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-126)           Total: -126 bytes
   text	   data	    bss	    dec	    hex	filename
 970412	   4219	   1848	 976479	  ee65f	busybox_old
 970286	   4219	   1848	 976353	  ee5e1	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-02-06 19:53:10 +01:00
Denys Vlasenko
c2788f88f4 libbb: introduce and use chdir_or_warn() 
function                                             old     new   delta
chdir_or_warn                                          -      37     +37
send_cgi_and_exit                                    720     711      -9
xchdir                                                27      15     -12
setup_environment                                    233     217     -16
fork_job                                             449     433     -16
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 37/-53)            Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-01-13 12:56:10 +01:00
Denys Vlasenko
db5546ca10 libbb: code shrink: introduce and use [_]exit_SUCCESS() 
function                                             old     new   delta
exit_SUCCESS                                           -       7      +7
_exit_SUCCESS                                          -       7      +7
run_pipe                                            1562    1567      +5
pseudo_exec_argv                                     399     400      +1
finish                                                86      87      +1
start_stop_daemon_main                              1109    1107      -2
shutdown_on_signal                                    38      36      -2
runsv_main                                          1662    1660      -2
redirect                                            1070    1068      -2
read_line                                             79      77      -2
pause_and_low_level_reboot                            54      52      -2
list_i2c_busses_and_exit                             483     481      -2
less_exit                                             12      10      -2
identify                                            4123    4121      -2
grep_file                                           1161    1159      -2
getty_main                                          1519    1517      -2
fsck_minix_main                                     2681    2679      -2
free_session                                         132     130      -2
fdisk_main                                          4739    4737      -2
clean_up_and_exit                                     53      51      -2
bsd_select                                          1566    1564      -2
bb_daemonize_or_rexec                                198     196      -2
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/17 up/down: 21/-34)           Total: -13 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-01-05 22:16:06 +01:00
Denys Vlasenko
31f45c1b36 libbb: factor out fflush_stdout_and_exit(EXIT_SUCCESS) 
function                                             old     new   delta
fflush_stdout_and_exit_SUCCESS                         -       7      +7
xxd_main                                             890     888      -2
vlock_main                                           353     351      -2
uuencode_main                                        318     316      -2
uniq_main                                            427     425      -2
uname_main                                           250     248      -2
sort_main                                            853     851      -2
shuf_main                                            500     498      -2
route_main                                           238     236      -2
readlink_main                                        113     111      -2
nice_main                                            156     154      -2
last_main                                            957     955      -2
ipcs_main                                            960     958      -2
env_main                                             209     207      -2
chrt_main                                            464     462      -2
cal_main                                             921     919      -2
baseNUM_main                                         650     648      -2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/16 up/down: 7/-32)            Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2022-01-04 23:31:58 +01:00
Denys Vlasenko
97c00ae134 httpd: fix compile failure if !FEATURE_HTTPD_RANGES 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-26 14:29:37 +01:00
Denys Vlasenko
b720629dfe httpd: do not send Last-Modified / ETag / Content-Length for error pages 
function                                             old     new   delta
send_headers                                         713     701     -12
send_headers_and_exit                                 20      34     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-17 21:02:16 +01:00
Denys Vlasenko
70683faf38 httpd: don't send Content-Length in error pages header 
function                                             old     new   delta
send_headers                                         701     713     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-17 20:37:58 +01:00
Denys Vlasenko
e67b80f473 udhcpc6: fix udhcp_find_option to actually find DHCP6 options 
udhcp_insert_new_option treats code for IPv6 as follows:

new->data[D6_OPT_CODE] = code >> 8;
new->data[D6_OPT_CODE + 1] = code & 0xff;

udhcp_find_option tests the code as follows:

while (opt_list && opt_list->data[OPT_CODE] < code)
...
if (opt_list && opt_list->data[OPT_CODE] == code)

So yes, OPT_CODE and D6_OPT_CODE are both 0, but the D6_OPT_CLIENTID =
1 value means that the 1 is in the seconds byte, and udhcp_find_option
is only looking at the first byte,  So the send_d6_release can never
find it the created option.

function                                             old     new   delta
udhcp_find_option                                     28      53     +25
attach_option                                        276     284      +8
udhcpc6_main                                        2602    2607      +5
perform_d6_release                                   262     267      +5
udhcpd_main                                         1518    1520      +2
udhcpc_main                                         2542    2544      +2
add_serverid_and_clientid_options                     46      48      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 7/0 up/down: 49/0)               Total: 49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-12 17:13:54 +01:00
Ildar Shaimordanov
b9fba185c5 wget: allow end-users to customize Content-Type for --post-data and --post-file 
More explanation in this PR:
https://github.com/rmyorston/busybox-w32/pull/233

The real use-case:
wget https://api.github.com/markdown/raw --header "Content-Type: text/plain"

function                                             old     new   delta
wget_main                                           2560    2581     +21
wget_user_headers                                     62      76     +14
.rodata                                           104196  104197      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 36/0)               Total: 36 bytes

Signed-off-by: Ildar Shaimordanov <ildar.shaimordanov@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-12 03:22:43 +01:00
Denys Vlasenko
27df6aeef2 tls: P256: factor out "multiply then reduce" operation 
function                                             old     new   delta
sp_256_mont_mul_and_reduce_8                           -      44     +44
sp_256_ecc_mulmod_8                                  517     442     -75
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 44/-75)            Total: -31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-11 23:27:40 +01:00
Denys Vlasenko
b240733ae7 tls: x25519: code shrink by factoring out common code 
function                                             old     new   delta
fe_reduce                                              -      37     +37
lm_add                                                67      43     -24
fe_mul_c                                              62      38     -24
fe_mul__distinct                                     138     112     -26
curve25519                                           800     767     -33
lm_sub                                                98      64     -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/5 up/down: 37/-141)          Total: -104 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-12-01 15:09:44 +01:00
Denys Vlasenko
8514b4166d tls: P256: enable 64-bit version of montgomery reduction 
After more testing, (1) I'm more sure it is indeed correct, and
(2) it is a significant speedup - we do a lot of those multiplications.

function                                             old     new   delta
sp_512to256_mont_reduce_8                            191     223     +32

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-28 21:43:51 +01:00
Denys Vlasenko
90b0d33044 tls: P256: add 64-bit montgomery reduce (disabled), small optimization in 32-bit code 
function                                             old     new   delta
sp_512to256_mont_reduce_8                            191     185      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-28 15:44:08 +01:00
Denys Vlasenko
832626227e tls: P256: add comment on logic in sp_512to256_mont_reduce_8, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-28 12:55:20 +01:00
Denys Vlasenko
cfb615781d tls: P256: simplify sp_256_mont_inv_8 (no need for a temporary) 
function                                             old     new   delta
sp_256_ecc_mulmod_8                                  543     517     -26

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-28 11:15:34 +01:00
Denys Vlasenko
1b93c7c4ec tls: P256: pad struct sp_point to 64 bits (on 64-bit arches) 
function                                             old     new   delta
curve_P256_compute_pubkey_and_premaster              198     190      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-28 02:56:02 +01:00
Denys Vlasenko
0b13ab66f4 tls: P256: trivial x86-64 fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 19:36:23 +01:00
Denys Vlasenko
f92ae1dc4b tls: P256: change logic so that we don't need double-wide vectors everywhere 
Change sp_256to512z_mont_{mul,sqr}_8 to not require/zero upper 256 bits.
There is only one place where we actually used that (and that's why there
used to be zeroing memset of top half!). Fix up that place.
As a bonus, 256x256->512 multiply no longer needs to care for
"r overlaps a or b" case.

This shrinks sp_point structure as well, not just temporaries.

function                                             old     new   delta
sp_256to512z_mont_mul_8                              150       -    -150
sp_256_mont_mul_8                                      -     147    +147
sp_256to512z_mont_sqr_8                                7       -      -7
sp_256_mont_sqr_8                                      -       7      +7
sp_256_ecc_mulmod_8                                  494     543     +49
sp_512to256_mont_reduce_8                            243     249      +6
sp_256_point_from_bin2x32                             73      70      -3
sp_256_proj_point_dbl_8                              353     345      -8
sp_256_proj_point_add_8                              544     499     -45
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 2/3 up/down: 209/-213)           Total: -4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 19:27:03 +01:00
Denys Vlasenko
9c671fe3dd tls: P256: do not open-code copying of struct variables 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 18:42:27 +01:00
Denys Vlasenko
dcfd8d3d10 tls: P256: fix sp_256_div2_8 - it wouldn't use a[] if low bit is 0 
It worked by chance because the only caller passed both parameters
as two pointers to the same array.
My fault (I made this error when converting from 26-bit code).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 16:24:49 +01:00
Denys Vlasenko
8cbb70365f tls: P256: remove redundant zeroing in sp_256_map_8 
Previous change made it obvious that we zero out already-zeroed high bits

function                                             old     new   delta
sp_256_ecc_mulmod_8                                  534     494     -40

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 15:50:40 +01:00
Denys Vlasenko
4415f7bc06 tls: P256: explain which functions use double-wide arrays, no code changes 
function                                             old     new   delta
sp_512to256_mont_reduce_8                              -     243    +243
sp_256to512z_mont_mul_8                                -     150    +150
sp_256to512z_mont_sqr_8                                -       7      +7
sp_256_mont_sqr_8                                      7       -      -7
sp_256_mont_mul_8                                    150       -    -150
sp_256_mont_reduce_8                                 243       -    -243
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 0/0 up/down: 400/-400)            Total: 0 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 15:47:26 +01:00
Denys Vlasenko
bbda85c74b tls: P256: remove constant-time trick in sp_256_proj_point_add_8 
function                                             old     new   delta
sp_256_proj_point_add_8                              576     544     -32

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 15:06:57 +01:00
Denys Vlasenko
26c8522522 tls: P256: do not open-code copying of struct variables 
function                                             old     new   delta
sp_256_ecc_mulmod_8                                  536     534      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 15:00:14 +01:00
Denys Vlasenko
446d136109 tls: tweak debug printout 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 12:03:43 +01:00
Denys Vlasenko
4bc9da1071 tls: P256: 64-bit optimizations 
function                                             old     new   delta
sp_256_proj_point_dbl_8                              421     428      +7
sp_256_point_from_bin2x32                             78      84      +6
sp_256_cmp_8                                          38      42      +4
sp_256_to_bin_8                                       28      31      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 20/0)               Total: 20 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-11-27 11:28:11 +01:00
Denys Vlasenko
94c78aa0b9 config system: move some options closer to relevalnt tool subdirectories 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-12 13:23:29 +02:00
Denys Vlasenko
aec8fbfb83 whitespace fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-11 19:11:06 +02:00
Denys Vlasenko
23aba8a9a6 tls: code shrink curve25519 
function                                             old     new   delta
fe_select                                             39       -     -39
curve25519                                           849     800     -49
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-88)             Total: -88 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-11 16:31:47 +02:00
Denys Vlasenko
74ee3f2f73 tls: remove unused tls_symmetric.h (was used by old "big" AES code) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-11 13:46:30 +02:00
Denys Vlasenko
53b2fdcdba *: add NOINLINEs where code noticeably shrinks 
function                                             old     new   delta
display                                               85    1463   +1378  -73 bytes
select_and_cluster                                     -    1088   +1088 -139 bytes
parse_reply                                            -     979    +979 -109 bytes
zbc_num_sqrt                                           -     632    +632 -191 bytes
show_bridge_port                                       -     585    +585  -56 bytes
sp_256_proj_point_add_8                                -     576    +576  -45 bytes
encode_then_append_var_plusminus                       -     554    +554 -118 bytes
read_mode_db                                           -     537    +537  -47 bytes
fbset_main                                          1331     747    -584
sp_256_ecc_mulmod_8                                 1157     536    -621
brctl_main                                          2189    1548    -641
expand_one_var                                      2544    1872    -672
zxc_vm_process                                      6412    5589    -823
send_queries                                        1813     725   -1088
recv_and_process_peer_pkt                           2245    1018   -1227
bb_dump_dump                                        1531      80   -1451
------------------------------------------------------------------------------
(add/remove: 7/0 grow/shrink: 1/8 up/down: 6329/-7107)       Total: -778 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-10 13:50:53 +02:00
Denys Vlasenko
84874785c2 httpd: if range is not specified, correctly fall back to read/write loop 
range_start was staying -1, and comparison meant to detect
"is it the first sendfile that failed, or not the first?"
was making incorrect decision. The result: nothing is sent.

function                                             old     new   delta
send_file_and_exit                                   865     877     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-08 15:41:08 +02:00
Denys Vlasenko
50c5b36dd7 help: s/Don't daemonize/Run in foreground/g 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-08 15:02:53 +02:00
Nicholas Niro
c28313bb17 ip: added support for setting netns on devices 
function                                             old     new   delta
set_netns                                              -     130    +130
do_iplink                                           1252    1315     +63
.rodata                                           104173  104179      +6
packed_usage                                       34020   33993     -27
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 199/-27)           Total: 172 bytes

Signed-off-by: Nicholas Niro <blowfist@xroutine.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-07 23:24:56 +02:00
Denys Vlasenko
17e6fb06b3 tls: whitespace fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 21:22:36 +02:00
Denys Vlasenko
5e9c617021 tls: P256: sp_256_sub_8_p256_mod always subtracts in-place, use that 
i386:

function                                             old     new   delta
sp_256_mont_reduce_8                                 245     243      -2
sp_256_mont_dbl_8                                     26      24      -2
sp_256_ecc_mulmod_8                                 1161    1157      -4
sp_256_proj_point_dbl_8                              359     353      -6
sp_256_sub_8_p256_mod                                 71      32     -39
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/5 up/down: 0/-53)             Total: -53 bytes

non-asm code:

function                                             old     new   delta
sp_256_sub_8_p256_mod                                  -      12     +12
sp_256_mont_reduce_8                                 250     243      -7
sp_256_mont_dbl_8                                     31      24      -7
sp_256_ecc_mulmod_8                                 1171    1157     -14
sp_256_proj_point_dbl_8                              374     353     -21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 12/-49)            Total: -37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 20:19:30 +02:00
Denys Vlasenko
87e3f2e9f8 tls: P256: x86-64 optimized sp_256_sub_8_p256_mod 
function                                             old     new   delta
sp_256_sub_8_p256_mod                                  -      53     +53
sp_256_mont_reduce_8                                 223     217      -6
sp_256_mont_dbl_8                                     38      32      -6
sp_256_ecc_mulmod_8                                 1535    1529      -6
sp_256_proj_point_dbl_8                              469     454     -15
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 53/-33)             Total: 20 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 19:59:39 +02:00
Denys Vlasenko
911344a998 tls: P256: x86-64 assembly 
function                                             old     new   delta
sp_256_mont_mul_8                                    127     155     +28
sp_256_proj_point_dbl_8                              448     469     +21
sp_256_mont_sub_8                                     23      35     +12
sp_256_mont_dbl_8                                     26      38     +12
sp_256_sub_8                                          44      49      +5
sp_256_ecc_mulmod_8                                 1530    1535      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/0 up/down: 83/0)               Total: 83 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 17:17:34 +02:00
Denys Vlasenko
22fd8fd3f4 tls: P256: tweak arm assembly (currently disabled) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 16:10:49 +02:00
Denys Vlasenko
d74993d31d tls: P@256: remove "header comment is kept intact" comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 14:28:47 +02:00
Denys Vlasenko
567eefcaf8 tls: P256: do not dumplicate sp_256_sub_8() 
function                                             old     new   delta
sp_256_proj_point_dbl_8                              359     374     +15
sp_256_ecc_mulmod_8                                 1159    1171     +12
sp_256_mont_reduce_8                                 245     250      +5
sp_256_mont_dbl_8                                     26      31      +5
sp_256_sub_8_p256_mod                                 43       -     -43
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 4/0 up/down: 37/-43)             Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 14:25:54 +02:00
Denys Vlasenko
00f2cceb6a tls: P256: shrink sp_256_mul_add_8 a bit more 
function                                             old     new   delta
sp_256_mont_reduce_8                                 257     245     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 10:15:29 +02:00
Denys Vlasenko
c784284615 tls: P256: propagate constants, create dedicated "subtract p256_mod" function 
8 instances of this subtraction probably warrant a few bytes more of code.

function                                             old     new   delta
sp_256_sub_8_p256_mod                                  -      71     +71
sp_256_mont_sub_8                                      -      29     +29
sp_256_mont_dbl_8                                      -      26     +26
sp_256_mont_reduce_8                                 262     257      -5
sp_256_ecc_mulmod_8                                 1171    1161     -10
sp_256_proj_point_dbl_8                              374     359     -15
static.sp_256_mont_sub_8                              29       -     -29
static.sp_256_mont_dbl_8                              31       -     -31
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 0/3 up/down: 126/-90)            Total: 36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 01:11:48 +02:00
Denys Vlasenko
2430fcfd8d tls: optimize sp_256_mont_reduce_8 in P256 
The code size decrease is small, but we eliminate ALL multiplies!

function                                             old     new   delta
sp_256_mont_reduce_8                                 268     262      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-06 00:24:03 +02:00
Denys Vlasenko
bbd723ebec tls: optimize sp_256_mul_8 in P256 
function                                             old     new   delta
sp_256_mont_mul_8                                    151     150      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-05 23:19:18 +02:00
Denys Vlasenko
3b411ebbfc tls: replace "26-bit" P256 code with 32-bit one. 
function                                             old     new   delta
sp_256_ecc_mulmod_8                                    -    1171   +1171
sp_256_mod_mul_norm_8                                  -     834    +834
sp_256_proj_point_dbl_8                                -     374    +374
sp_256_mont_reduce_8                                   -     268    +268
sp_256_mont_mul_8                                      -     151    +151
sp_256_sub_8                                           -      76     +76
sp_256_add_8                                           -      76     +76
sp_256_cmp_8                                           -      38     +38
static.sp_256_mont_dbl_8                               -      31     +31
static.sp_256_mont_sub_8                               -      29     +29
sp_256_to_bin_8                                        -      28     +28
sp_256_point_from_bin2x32                             50      73     +23
sp_256_mont_sqr_8                                      -       7      +7
sp_256_mont_sqr_10                                     7       -      -7
p256_mod                                              40      32      -8
curve_P256_compute_pubkey_and_premaster              186     167     -19
sp_256_sub_10                                         22       -     -22
sp_256_add_10                                         22       -     -22
sp_256_cmp_10                                         24       -     -24
sp_256_norm_10                                        31       -     -31
static.sp_256_mont_sub_10                             49       -     -49
static.sp_256_mont_dbl_10                             52       -     -52
static.sp_256_mul_add_10                              82       -     -82
sp_256_from_bin_10                                   119       -    -119
sp_256_to_bin_10                                     120       -    -120
sp_256_mont_reduce_10                                178       -    -178
sp_256_mont_mul_10                                   214       -    -214
sp_256_proj_point_dbl_10                             451       -    -451
sp_256_ecc_mulmod_10                                1216       -   -1216
sp_256_mod_mul_norm_10                              1305       -   -1305
------------------------------------------------------------------------------
(add/remove: 12/15 grow/shrink: 1/2 up/down: 3106/-3919)     Total: -813 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-05 20:01:38 +02:00
Denys Vlasenko
55578f2fb7 tls: fix the case of sp_256_mont_tpl_10() leaving striay high bits 
It has no effect on correctness, but interferes with compating internal state
of different implementations.

function                                             old     new   delta
sp_256_proj_point_dbl_10                             443     451      +8
static.sp_256_mont_sub_10                             46      49      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 11/0)               Total: 11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-10-05 19:46:39 +02:00