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On s390x, POSIX_FADV_DONTNEED and POSIX_FADV_NOREUSE have different
values than on all other architectures that Linux supports.
Handle this difference by wrapping their definitions in
include/fcntl.h in #ifdef, so that arch/s390x/bits/fcntl.h can
override them.
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io_pgetevents is new in linux commit
7a074e96dee62586c935c80cecd931431bfdd0be
rseq is new in linux commit
d7822b1e24f2df5df98c76f0e94a5416349ff759
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this will allow the compiler to cache and reuse the result, meaning we
no longer have to take care not to load it more than once for the sake
of archs where the load may be expensive.
depends on commit 1c84c99913bf1cd47b866ed31e665848a0da84a2 for
correctness, since otherwise the compiler could hoist loads during
stage 3 of dynamic linking before the initial thread-pointer setup.
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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).
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new in linux commit 71406883fd35794d573b3085433c41d0a3bf6c21
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align with commit c9c2cd3e6955cb1d57b8be01d4b072bf44058762.
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PAGESIZE is actually the version defined in POSIX base, with PAGE_SIZE
being in the XSI option. use PAGESIZE as the underlying definition to
facilitate making exposure of PAGE_SIZE conditional.
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to store hypervisor information, added in linux commit
3d8757b87d7fc15a87928bc970f060bc9c6dc618
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s390 can use the generic ioctls definitions other than FIOQSIZE (like arm).
this fixes some missing ioctls and two incorrect ones:
TIOCTTYGSTRUCT and TIOCM_MODEM_BITS seem to be defined on frv
target only in linux.
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new syscall in linux commit 916cda1aa1b412d7cf2991c3af7479544942d121
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statx was added in linux commit a528d35e8bfcc521d7cb70aaf03e1bd296c8493f
(there is no libc wrapper yet and microblaze and sh misses the number).
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aligned with linux arch/s390/include/asm/elf.h
(these macros should be exported into uapi, but they are not)
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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.)
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This structure was missed when creating the s390x port.
This is based on the report and patch from William Pitcock, but with a
modified structure defintion to more closely match the kernel's
definition.
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Including sys/procfs.h complains unknown type name 'fpreg_t' in
bits/user.h. fpreg_t in bits/signal.h and elf_fpreg_t in bits/user.h
are practically the same.
per_struct is never used, even conflicts with kernel header
asm/ptrace.h
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