Mercurial > hg > nginx
annotate src/os/unix/ngx_sunpro_amd64.il @ 7851:aa5f8825f24d
Resolver: fixed label types handling in ngx_resolver_copy().
Previously, anything with any of the two high bits set were interpreted
as compression pointers. This is incorrect, as RFC 1035 clearly states
that "The 10 and 01 combinations are reserved for future use". Further,
the 01 combination is actually allocated for EDNS extended label type
(see RFC 2671 and RFC 6891), not really used though.
Fix is to reject unrecognized label types rather than misinterpreting
them as compression pointers.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Tue, 25 May 2021 15:17:41 +0300 |
| parents | 2cd019520210 |
| children |
| rev | line source |
|---|---|
| 561 | 1 / |
| 2 / Copyright (C) Igor Sysoev | |
| 4412 | 3 / Copyright (C) Nginx, Inc. |
| 561 | 4 / |
| 5 | |
| 6 / ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock, | |
| 7 / ngx_atomic_uint_t old, ngx_atomic_uint_t set); | |
| 8 / | |
| 9 / the arguments are passed in %rdi, %rsi, %rdx | |
| 10 / the result is returned in the %rax | |
| 11 | |
| 12 .inline ngx_atomic_cmp_set,0 | |
| 13 movq %rsi, %rax | |
| 14 lock | |
| 15 cmpxchgq %rdx, (%rdi) | |
| 16 setz %al | |
| 17 movzbq %al, %rax | |
| 18 .end | |
| 19 | |
| 20 | |
| 21 / ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value, | |
| 22 / ngx_atomic_int_t add); | |
| 23 / | |
| 24 / the arguments are passed in %rdi, %rsi | |
| 25 / the result is returned in the %rax | |
| 26 | |
| 27 .inline ngx_atomic_fetch_add,0 | |
| 28 movq %rsi, %rax | |
| 29 lock | |
| 30 xaddq %rax, (%rdi) | |
| 31 .end | |
| 1309 | 32 |
| 33 | |
| 34 / ngx_cpu_pause() | |
|
3479
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
35 / |
|
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
36 / the "rep; nop" is used instead of "pause" to avoid the "[ PAUSE ]" hardware |
|
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
37 / capability added by linker because Solaris/amd64 does not know about it: |
|
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
38 / |
|
bfd1912e55a9
use "rep; nop" instead of "pause" on Solaris/amd64
Igor Sysoev <igor@sysoev.ru>
parents:
1309
diff
changeset
|
39 / ld.so.1: nginx: fatal: hardware capability unsupported: 0x2000 [ PAUSE ] |
| 1309 | 40 |
| 6474 | 41 .inline ngx_cpu_pause,0 |
| 42 rep; nop | |
| 43 .end |