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freebsd-dev/lib/libc
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Kyle Evans 8b8cf4ece6 memfd_create: simplify HUGETLB support a little bit 
This also fixes a minor issue that was missed in the initial review; the
layout of the MFD_HUGE_* flags is actually not 1:1 bit:flag -- it instead
borrowed the Linux convention of how this is laid out since it was
originally implemented on Linux, the top 6 bits represent the shift required
for the requested page size.

This allows us to remove the flag <-> pgsize mapping table and simplify the
logic just prior to validation of the requested page size.

While we're here, fix two small nits:

- HUGETLB memfd shouldn't exhibit the SHM_GROW_ON_WRITE behavior. We can
  only grow largepage shm by appropriately aligned (i.e. requested pagesize)
  sizes, so it can't work in the typical/sane fashion. Furthermore, Linux
  does the same, so let's be compatible.

- We don't allow MFD_HUGETLB without specifying a pagesize, so no need to
  check for that later.

Reviewed by:	kib (slightly earlier version)
2020-09-11 02:02:15 +00:00
..
aarch64 Fix initial exec TLS mode for dynamically loaded shared objects. 2019-03-29 17:52:57 +00:00
amd64 amd64: sync up libc memcmp with the kernel version (r357309) 2020-01-30 19:57:05 +00:00
arm arm/ffs.S: remove stale comment. 2019-12-28 02:11:41 +00:00
capability libcasper(3): Document HISTORY within the manpages 2020-06-16 16:48:52 +00:00
compat-43 Adjust history, info source from v1's manuals 2019-09-04 13:44:46 +00:00
db Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
gdtoa Remove sparc64 specific parts of libc. 2020-02-26 18:55:09 +00:00
gen getlogin_r: fix the type of len 2020-09-09 18:07:13 +00:00
gmon mcount: tidy up ANSIfication 2018-10-20 22:39:35 +00:00
i386 remove obsolete i386 MD memchr implementation 2019-09-25 16:49:22 +00:00
iconv Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
include Add pthread_getname_np() and pthread_setname_np() aliases for 2020-06-10 22:13:24 +00:00
inet libc: fix cases of undefined behavior. 2018-08-07 15:24:19 +00:00
isc SPDX: more ISC-related files. 2017-12-08 17:52:53 +00:00
locale setlocale(3): Add an EXAMPLES section and add LANG category 2020-08-07 17:25:56 +00:00
md Replace dot-dot relative pathing with SRCTOP-relative paths where possible 2017-01-20 03:23:24 +00:00
mips mips: fix some mcount nits 2019-09-02 01:55:55 +00:00
nameser Bounds check again after advancing cp, otherwise we have a possible 2019-09-05 19:35:30 +00:00
net Add include missing from my last commit. 2020-06-21 23:47:27 +00:00
nls Fix race condition in catopen(3). 2020-03-19 06:33:06 +00:00
posix1e Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
powerpc [PowerPC] Implement VDSO timebase access on powerpc* 2020-09-08 03:00:31 +00:00
powerpc64 [PowerPC] Implement VDSO timebase access on powerpc* 2020-09-08 03:00:31 +00:00
powerpcspe [PowerPC] Implement VDSO timebase access on powerpc* 2020-09-08 03:00:31 +00:00
quad Add casts and L suffixes to libc quad support, to work around various 2020-02-17 20:14:59 +00:00
regex libregex: Implement a subset of the GNU extensions 2020-08-04 02:14:51 +00:00
resolv Rather than using the legacy IP struct fields in the union for the 2019-06-04 20:53:35 +00:00
riscv libc: Provide sub fp(s|g)etmask() implementations for RISC-V 2020-08-03 12:48:51 +00:00
rpc Fix -Wvoid-pointer-to-enum-cast warnings. 2020-04-15 18:15:58 +00:00
secure Remove the SYMVER build option. 2020-04-30 22:08:40 +00:00
softfloat Add implementations for clog(3), clogf(3), and clog(3). 2018-05-13 09:54:34 +00:00
stdio tmpnam(3): Also mention tmpfile in the ENVIRONMENT section 2020-08-07 16:20:07 +00:00
stdlib Follow-up r365371 by removing sentences which indicate the state of the 2020-09-06 09:08:06 +00:00
stdtime strptime: make %k and %l specifiers match their description in 2018-11-03 23:37:13 +00:00
string strtok(3): make it easier to find the RETURN VALUES section 2020-06-22 11:03:36 +00:00
sys memfd_create: simplify HUGETLB support a little bit 2020-09-11 02:02:15 +00:00
tests libc tests: dynthr_mod: fix some WARNS issues 2020-09-09 02:45:47 +00:00
uuid libc: further adoption of SPDX licensing ID tags. 2017-11-25 17:12:48 +00:00
x86 Remove resolver_qual from DEFINE_IFUNC/DEFINE_UIFUNC macros. 2019-05-16 22:20:54 +00:00
xdr typo: s/impelmentation/implementation/. 2020-02-07 15:14:29 +00:00
yp Increase the size of the send and receive buffers for YP client rpc 2019-09-16 06:42:01 +00:00
libc_nossp.ldscript
libc.ldscript
Makefile Revert that! 2020-07-19 23:56:19 +00:00
Makefile.depend Update Makefile.depend files 2019-12-11 17:37:53 +00:00
Makefile.depend.options Update libssp paths in various Makefile.depend* files 2020-01-06 18:15:55 +00:00
Versions.def Create namespace for the symbols added during 13-CURRENT cycle. 2018-11-12 19:12:14 +00:00