Commit Graph

34 Commits

Author SHA1 Message Date
Szabolcs Nagy
df6d9450ea add support for arch-specific ptrace command macros
sys/ptrace.h is target specific, use bits/ptrace.h to add target
specific macro definitions.

these macros are kept in the generic sys/ptrace.h even though some
targets don't support them:

PTRACE_GETREGS
PTRACE_SETREGS
PTRACE_GETFPREGS
PTRACE_SETFPREGS
PTRACE_GETFPXREGS
PTRACE_SETFPXREGS

so no macro definition got removed in this patch on any target. only
s390x has a numerically conflicting macro definition (PTRACE_SINGLEBLOCK).

the PT_ aliases follow glibc headers, otherwise the definitions come
from linux uapi headers except ones that are skipped in glibc and
there is no real kernel support (s390x PTRACE_*_AREA) or need special
type definitions (mips PTRACE_*_WATCH_*) or only relevant for linux
2.4 compatibility (PTRACE_OLDSETOPTIONS).
2018-07-17 22:25:08 -04:00
Rich Felker
587f5a53bc fix value of SO_PEERSEC on mips archs
adapted from patch by Matthias Schiffer.
2018-06-26 15:55:29 -04:00
Szabolcs Nagy
1177f61d6e mips: add HWCAP_ flags from linux v4.17
new in linux commit 256211f2b0b251e532d1899b115e374feb16fa7a
2018-06-19 13:27:27 -04:00
Szabolcs Nagy
610c5a8524 fix TLS layout of TLS variant I when there is a gap above TP
In TLS variant I the TLS is above TP (or above a fixed offset from TP)
but on some targets there is a reserved gap above TP before TLS starts.

This matters for the local-exec tls access model when the offsets of
TLS variables from the TP are hard coded by the linker into the
executable, so the libc must compute these offsets the same way as the
linker.  The tls offset of the main module has to be

	alignup(GAP_ABOVE_TP, main_tls_align).

If there is no TLS in the main module then the gap can be ignored
since musl does not use it and the tls access models of shared
libraries are not affected.

The previous setup only worked if (tls_align & -GAP_ABOVE_TP) == 0
(i.e. TLS did not require large alignment) because the gap was
treated as a fixed offset from TP.  Now the TP points at the end
of the pthread struct (which is aligned) and there is a gap above
it (which may also need alignment).

The fix required changing TP_ADJ and __pthread_self on affected
targets (aarch64, arm and sh) and in the tlsdesc asm the offset to
access the dtv changed too.
2018-06-02 19:38:44 -04:00
Rich Felker
eb5ae94016 fix minor namespace issues in termios.h
the output delay features (NL*, CR*, TAB*, BS*, and VT*) are
XSI-shaded. VT* is in the V* namespace reservation but the rest need
to be suppressed in base POSIX namespace.

unfortunately this change introduces feature test macro checks into
another bits header. at some point these checks should be simplified
by having features.h handle the "FTM X implies Y" relationships.
2018-03-10 18:19:41 -05:00
Szabolcs Nagy
9b57db3f95 add MAP_SYNC and MAP_SHARED_VALIDATE from linux v4.15
for synchronous page faults, new in linux commit
1c9725974074a047f6080eecc62c50a8e840d050 and
b6fb293f2497a9841d94f6b57bd2bb2cd222da43
note that only targets that use asm-generic/mman.h have this new
flag defined, so undef it on other targets (mips*, powerpc*).
2018-02-22 18:48:58 -05:00
Szabolcs Nagy
9eda4dc69c mips,powerpc: fix TIOCSER_TEMT in termios.h
use the same token to define TIOCSER_TEMT as is used in ioctl.h
so when both headers are included there are no redefinition warnings
during musl build.
2018-02-22 18:48:38 -05:00
Szabolcs Nagy
754f66afb7 ioctl TIOCGPTPEER from linux v4.13
added for safe opening of peer end of pty in a mount namespace.
new in linux commit c6325179238f1d4683edbec53d8322575d76d7e2
2017-11-05 18:41:22 -05:00
Szabolcs Nagy
9864f60e92 add statx syscall numbers from linux v4.11
statx was added in linux commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f
(there is no libc wrapper yet and microblaze and sh misses the number).
2017-11-05 18:41:11 -05:00
Szabolcs Nagy
cc08669380 add SIOCGSTAMPNS socket ioctl macro to ioctl.h
it is defined in linux asm/sockios.h since commit
ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23 (linux v2.6.22)
but was missing from musl by accident.

in musl the sockios macros are exposed in sys/ioctl.h together
with other ioctl requests instead of in sys/socket.h because of
namespace rules. (glibc has them in sys/socket.h under _GNU_SOURCE.)
2017-08-29 19:48:37 -04:00
Szabolcs Nagy
02b50c9d0a fix mips ioctl macros to match linux asm/sockios.h 2017-08-29 19:48:35 -04:00
Rich Felker
1c497005ee remove long-obsolete clang workarounds from mips* syscall_arch.h files
at one point, clang reportedly failed to support the asm register
constraints needed for inline syscalls. versions of clang that old
have much bigger problems that preclude using them to compile musl
libc.
2017-05-31 21:49:44 -04:00
Rich Felker
4073f03add fix fstatat syscall on mips64
mips64 requires 'struct stat' conversion due to incorrect 32-bit
fields where time_t should be in the kernel version of the structure.
syscall_arch.h already performed the correct translation for stat,
fstat, and lstat syscalls, but omitted special handling for fstatat.
2017-05-31 21:46:15 -04:00
Szabolcs Nagy
62eaf40bf4 add pkey_{mprotect,alloc,free} syscalls from linux v4.9
see linux commit e8c24d3a23a469f1f40d4de24d872ca7023ced0a
and linux Documentation/x86/protection-keys.txt
2016-12-29 22:10:19 -05:00
Szabolcs Nagy
fe39aaae0e add bits/hwcap.h and include it in sys/auxv.h
aarch64, arm, mips, mips64, mipsn32, powerpc, powerpc64 and sh have
cpu feature bits defined in linux for AT_HWCAP auxv entry, so expose
those in sys/auxv.h

it seems the mips hwcaps were never exposed to userspace neither
by linux nor by glibc, but that's most likely an oversight.
2016-10-20 01:28:25 -04:00
Rich Felker
cff5747c74 fix regression in tcsetattr on all mips archs
revert commit 8c316e9e49. it was wrong
and does not match how the kernel API works.
2016-07-13 15:04:30 -04:00
Szabolcs Nagy
8c316e9e49 fix TCS* definitions in mips termios.h
these were incorrectly using the generic definitions.
2016-07-03 15:02:24 -04:00
Szabolcs Nagy
ee9b5900fb fix mips termios.h macro exposure/namespace issues
same changes to the defined macros as in powerpc and generic bits.
2016-07-03 15:02:24 -04:00
Szabolcs Nagy
809495f7b7 fix TIOCMSET in mips ioctl.h
it seems it was a typo.
2016-07-03 14:54:35 -04:00
Szabolcs Nagy
b76d4e06f1 fix mips, mips64, mipsn32 TIOCM_* macros in ioctl.h
TIOCM_ macros were wrongly using the asm-generic/termios.h definitions
instead of the mips specific ones from asm/termios.h
2016-07-03 14:54:34 -04:00
Szabolcs Nagy
058c0b2d70 remove mips and powerpc ioctls that are missing from linux uapi
mips and powerpc use their own asm/ioctls.h, not the asm-generic/ioctls.h
and they lack termiox macros that are available on other targets.
see kernel commit 1d65b4a088de407e99714fdc27862449db04fb5c
2016-07-03 14:54:34 -04:00
Szabolcs Nagy
5ce901279e add missing TIOC* macros to ioctl.h
these are defined in linux asm/ioctls.h.
(powerpc64 and powerpc bits/ioctl.h are now identical)
2016-07-03 14:54:34 -04:00
Szabolcs Nagy
8735a921d0 add missing SIOCSIFNAME from linux/sockios.h to ioctl.h
glibc ioctl.h has it too.
2016-07-03 14:54:33 -04:00
Szabolcs Nagy
2df9ae9161 remove ioctl macros that were removed from linux uapi
TIOCTTYGSTRUCT, TIOCGHAYESESP, TIOCSHAYESESP and TIOCM_MODEM_BITS
were removed from the linux uapi and not present in glibc ioctl.h
2016-07-03 14:54:33 -04:00
Rich Felker
7158481d51 add consistent reserved fields in mips64/n32 termios structures
the (unused) speed fields were omitted when these ports were first
added (within this release cycle, so not present in any release yet)
in accordance with how glibc defines the structure on mips archs.
however their omission does not match existing musl practice/intent.

glibc provides its own, mostly-unified termios structure definition
and performs translation in userspace to match the kernel structure
for the arch, but has gratuitous differences on a few archs like mips,
presumably as a result of historical mistakes. some other libcs use
the kernel definitions directly. musl essentially does that, by
matching the kernel layout in the part of the structure the kernel
will read/write, but leaves additional space at the end for
extensibility. these are nominally the (nonstandard) speed fields and
(on most archs) extra c_cc elements, but since they are not used they
could be repurposed if there's ever a need.
2016-07-03 10:49:52 -04:00
Szabolcs Nagy
78b1f3cb14 add preadv2 and pwritev2 syscall numbers for linux v4.6
the syscalls take an additional flag argument, they were added in commit
f17d8b35452cab31a70d224964cd583fb2845449 and a RWF_HIPRI priority hint
flag was added to linux/fs.h in 97be7ebe53915af504fb491fb99f064c7cf3cb09.

the syscall is not allocated for microblaze and sh yet.
2016-06-09 13:38:41 -04:00
Bobby Bingham
63e3a1661f deduplicate __NR_* and SYS_* syscall number definitions 2016-05-12 00:34:05 -05:00
Rich Felker
6d99ad91e8 add support for mips and mips64 r6 isa
mips32r6 and mips64r6 are actually new isas at both the asm source and
opcode levels (pre-r6 code cannot run on r6) and thus need to be
treated as a new subarch. the following changes are made, some of
which yield code generation improvements for non-r6 targets too:

- add subarch logic in configure script and reloc.h files for dynamic
  linker name.

- suppress use of .set mips2 asm directives (used to allow mips2
  atomic instructions on baseline mips1 builds; the kernel has to
  emulate them on mips1) except when actually needed. they cause wrong
  instruction encodings on r6, and pessimize inlining on at least some
  compilers.

- only hard-code sync instruction encoding on mips1.

- use "ZC" constraint instead of "m" constraint for llsc memory
  operands on r6, where the ll/sc instructions no longer accept full
  16-bit offsets.

- only hard-code rdhwr instruction encoding with .word on targets
  (pre-r2) where it may need trap-and-emulate by the kernel.
  otherwise, just use the instruction mnemonic, and allow an arbitrary
  destination register to be used.
2016-04-03 10:42:37 +00:00
Szabolcs Nagy
84d4f5eee5 add copy_file_range syscall numbers from linux v4.5
it was introduced for offloading copying between regular files
in linux commit 29732938a6289a15e907da234d6692a2ead71855

(microblaze and sh does not yet have the syscall number.)
2016-03-19 11:30:49 -04:00
Szabolcs Nagy
2de52704ca mips64: add recent linux syscall numbers
add userfaultfd, membarrier and mlock2 system call numbers.
2016-03-19 11:30:22 -04:00
Szabolcs Nagy
e9f1c7981a deduplicate bits/mman.h
currently five targets use the same mman.h constants and the rest
share most constants too, so move them to sys/mman.h before the
bits/mman.h include where the differences can be corrected by
redefinition of the macros.

this fixes two minor bugs: POSIX_MADV_DONTNEED was wrong on most
targets (it should be the same as MADV_DONTNEED), and sh defined
the x86-only MAP_32BIT mmap flag.
2016-03-18 22:40:28 -04:00
Rich Felker
de400b6609 correct pointer types for a_ll_p and a_sc_p primitives on mips64
these changes should not affect generated code, but they reflect that
the underlying objects operated on by a_cas_p are supposed to have
type volatile void *, not volatile long. in theory a compiler could
treat the effective type mismatch in the "m" memory operands as
undefined behavior.
2016-03-11 05:12:56 +00:00
Rich Felker
27bf42cd9d make mips64 a_sc_p atomic primitive's asm constraints work with clang
apparently clang does not accept matching-register input and output
constraints that differ in size (32-bit vs 64-bit).

based on patch by Jaydeep Patil.
2016-03-11 00:02:10 -05:00
Rich Felker
83933573af add mips64 port
patch by Mahesh Bodapati and Jaydeep Patil of Imagination
Technologies.
2016-03-06 17:41:56 +00:00