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opnsense-src/lib/libc
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Robert Clausecker ff7799e003 lib/libc/amd64/string: add memrchr() scalar, baseline implementation 
The scalar implementation is fairly simplistic and only performs
slightly better than the generic C implementation. It could be
improved by using the same algorithm as for memchr, but it would
have been a lot more complicated.

The baseline implementation is similar to timingsafe_memcmp.  It's
slightly slower than memchr() due to the more complicated main
loop, but I don't think that can be significantly improved.

Tested by:	developers@, exp-run
Approved by:	mjg
MFC after:	1 month
MFC to:		stable/14
PR:		275785
Differential Revision:	https://reviews.freebsd.org/D42925

(cherry picked from commit fb197a4f7751bb4e116989e57ba7fb12a981895f)
2024-01-24 20:39:31 +01:00
..
aarch64 libc: don't needlessly add vfork.o to NOASM 2024-01-02 16:58:54 +00:00
amd64 lib/libc/amd64/string: add memrchr() scalar, baseline implementation 2024-01-24 20:39:31 +01:00
arm libc: rename arm and i386 Ovfork.S to vfork.S 2024-01-02 16:58:42 +00:00
capability libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
compat-43 libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
csu libc: Purge unneeded cdefs.h 2023-11-26 21:20:09 -07:00
db libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
gdtoa libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
gen Fix "version introduced" in numerous manual pages 2024-01-15 10:20:56 -05:00
gmon libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
i386 libc: rename arm and i386 Ovfork.S to vfork.S 2024-01-02 16:58:42 +00:00
iconv libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
include libc: Purge unneeded cdefs.h 2023-11-26 21:20:09 -07:00
inet libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
isc libc: Purge unneeded cdefs.h 2023-11-26 21:20:09 -07:00
locale libc: remove some obsolete VCS data 2023-12-13 23:08:50 +00:00
md Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00
nameser libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
net resolv: Add a required include to resolv.h 2024-01-15 19:33:59 +09:00
nls libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
posix1e libc: correct some memory leaks in acl_to_text(3) and acl_to_text_np(3) 2023-12-20 10:29:55 +02:00
powerpc libc: centralize a few numeric symbols 2023-12-13 22:08:14 +00:00
powerpc64 libc: centralize a few numeric symbols 2023-12-13 22:08:14 +00:00
powerpcspe libc/<arch>/sys/Makefile.inc: remove cruft 2023-12-13 22:08:13 +00:00
quad libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
regex libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
resolv libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
riscv libc: don't needlessly add vfork.o to NOASM 2024-01-02 16:58:54 +00:00
rpc libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
secure libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
softfloat libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
stdio libc: remove some obsolete VCS data 2023-12-13 23:08:50 +00:00
stdlib strfmon.c: Use the restrict keyword directly 2023-12-16 06:17:51 +02:00
stdtime libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
string lib/libc/string: document restrict qualification of memccpy() arguments 2024-01-24 20:39:30 +01:00
sys sigfastblock.2: Fix a typo in the manual page 2024-01-23 07:43:27 +01:00
tests lib/libc/tests/string: add memrchr unit tests 2024-01-24 20:39:30 +01:00
uuid libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
x86 pkru.3: Fix a typo in the manual page 2024-01-23 07:43:42 +01:00
xdr libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
yp libc: Remove empty comments in Symbol.map 2023-12-13 22:08:13 +00:00
libc.ldscript Remove $FreeBSD$: one-line .c comment pattern 2023-08-16 11:54:29 -06:00
libc_nossp.ldscript Remove $FreeBSD$: one-line .c comment pattern 2023-08-16 11:54:29 -06:00
Makefile lib{c,lzma,z}: remove -DSYMBOL_VERSIONING from CFLAGS 2023-12-13 22:08:13 +00:00
Makefile.depend Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00
Makefile.depend.options Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00
Versions.def Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00