remove these, they are no longer necessary or appropriate

branches: 1.1.2;
File which provides lint stubs for the functions defined by
machine-dependent assembly code, whose source files live in its directory.
(Not necessarily complete yet.)

these went to compat

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.2.8;
Warn about references to the compatibility vfork() (i.e. the vfork() with
the 4.4BSD non-shared-address-space semantics), and direct the user to
include <unistd.h> to generate the correct reference.

This warning isn't about an ABI compatibility issue, but the new vfork() is
considerably faster.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

branches: 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.10;
fix typos

branches: 1.1.2;
Add a __clone(3) entry point.

these went to compat

Add __msgctl13(), __semctl13(), and __shmctl13() (symbols are __RENAME()'d
in their respective header files). Add PSEUDO stubs for the old versions
of these system calls.

Note that __semctl13() doesn't require the extra stub that the old
semctl()/__semctl() did, as the SUSv2 version takes variable arguments,
and thus does not require the extra indirection.

Merge all MD __sigaction14_sigtramp.c copies into one:
- sparc and sparc64 were not using version 0 sigcontext when there were
no arguments in the signal version. This was probably a bug.
- vax is using +1 the version numbers of the other archs.
- Only hppa was defining __LIBC12_SOURCE__ so it was getting a working
sigcontext before. all the other ports that supported sigcontext had
the compat code disabled.
[pointed out by thorpej, thanks!]
If we want to remove sigcontext support from userland at least now there
is less work to do so.

branches: 1.7.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.18;
make these consistent.

save errno while trying to install a !SA_SIGINFO trampoline -- this
is expected to fail with !COMPAT_16 kernels, and we shouldn't
overwrite errno in this case

sync with the x86 one.

Siginfo libc changes for alpha. Approved by thorpej@netbsd.org.

Merge the nathanw_sa branch.

branches: 1.1.2;
New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

these went to compat

fix siginfo adaption -- the "compat_16" prefix
shouldn't be exposed as a symbol

Siginfo libc changes for alpha. Approved by thorpej@netbsd.org.

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.8;
Signal changes for Alpha.

these went to compat

no need to define __HAVE_SIGINFO anymore

Siginfo libc changes for alpha. Approved by thorpej@netbsd.org.

branches: 1.1.2;
New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

Use the DWARF pseudo-register for the signal trampoline return address.

CFI: Saved RA needs to point to the PC slot in the ucontext_t.

Set up the CFI in a slightly more rational way.

Fix typo (thanks kamil@ for pointing it out).

Add call frame unwind info to the Alpha signal trampoline. Using
kamil@'s test program:

Before:
Backtrace 2 stack frames.
0x120000a74 <handler+0x54> at ./test
0x3fffdca6550 <__sigtramp_siginfo_2> at /usr/lib/libc.so.12

After:
Backtrace 4 stack frames.
0x120000a74 <handler+0x54> at ./test
0x3fffdca6554 <__sigtramp_siginfo_2> at /usr/lib/libc.so.12
0x120000b10 <main+0x38> at ./test
0x1200009b4 <___start+0x1a4> at ./test

- Consistently use _REG_* defines from assym.h to mean register numbers,
not offsets (i.e. *8 to get the offset).
- Define and use SIZEOF_SIGINFO and UC_GREGS constants, rather than
hard-code magic numbers.

NFC -- same object code is generated.

if setcontext(2) returns, _exit(2) with a return code of -1 instead
of relying on a sensible return value

Siginfo libc changes for alpha. Approved by thorpej@netbsd.org.

Add the obvious, trivial __syscall() stub.

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.8;
Add syscall stubs for __vfork14(). These are basically copies of Ovfork.S
with the syscall numbers changed.

Since 4.4BSD vfork(2) did not share address space, Ovfork.S could be changed
to be identical to fork.S (modulo syscall numbers). __vfork14.S, however,
needs to remain separate since with a shared address space, the stub needs to
pre-decrement the stack and do an indirect jump to the return address, so that
the shared stackframe is still there when the parent returns. (Obviously,
this does not apply to systems which to not build stackframes on leaf calls.)

Make the END() argument match the entry name.

branches: 1.8.2;
Thinko in previous: we do always use an internal name.

Add internal names for brk() and sbrk().

branches: 1.6.2;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.5.8;
* On architectures using ELF, and conditionally on those in transition, rename
_ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and
_C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to
avoid possible name clashes with identifiers used in user applications.
* Do the same for minbrk on all architectures to avoid a GCC-specific (and
on ELF architectures effectively useless) symbol reference renaming in MI code.

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

user better names for local labels, as suggested by Matt Thomas and
slightly tweaked.

be more conservative when setting the gp

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.5.8;
* On architectures using ELF, and conditionally on those in transition, rename
_ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and
_C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to
avoid possible name clashes with identifiers used in user applications.
* Do the same for minbrk on all architectures to avoid a GCC-specific (and
on ELF architectures effectively useless) symbol reference renaming in MI code.

if _REENTRANT is defined, store the error value in (*__errno()), rather than
in errno directly, to support threads packages.

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

user better names for local labels, as suggested by Matt Thomas and
slightly tweaked.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Mark exect(3) obsolete and bind it to plain execve(2) on all platforms

The original exect(2) from BSD4.2 was enabling bit for tracing
(single-step mode) and calling execve(2). The purpose of it was to generate
a signal for a tracer once the application will change its image to a new
program.

This approach no longer works as:
- exect(2) traces (single-steps) libc and it requires hundreds or
thousands steps before entering a new image
- it's vax and x86 specific code
- this functionality has been moved to the kernel - once a process is
traced it will generate SIGTRAP with si_code TRAP_EXEC and route it to
its debugger
- the side effects and unportability make this interface unusable
- there are no known users of this interface
- it apparently never worked better since day0 of NetBSD ("day0 bug")

Users are requested to move to other execve(2) variants. Calling current
execve(2) as it is the most similar behavior to this one from BSD4.2.

Discussed several times on mailing lists and in PR/51700.

Add warning to exect(3) telling about marking this function obsolete.

This function is prepared to be removed in next libc major bump.

Sponsored by <The NetBSD Foundation>

branches: 1.3.86; 1.3.90;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.2.12;
catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Implement pthread_atfork() (in libc, because the required threadlib
stub behavior is exactly the same as the usual behavior).

Make the END() argument match the entry name.

branches: 1.3.2;
Need an internal name for fork().

branches: 1.2.2;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.20;
libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

- Consistently use _REG_* defines from assym.h to mean register numbers,
not offsets (i.e. *8 to get the offset).
- Define and use SIZEOF_SIGINFO and UC_GREGS constants, rather than
hard-code magic numbers.

NFC -- same object code is generated.

branches: 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.30;
Merge the nathanw_sa branch.

branches: 1.1.2;
file getcontext.S was initially added on branch nathanw_sa.

these went to compat

Add __msgctl13(), __semctl13(), and __shmctl13() (symbols are __RENAME()'d
in their respective header files). Add PSEUDO stubs for the old versions
of these system calls.

Note that __semctl13() doesn't require the extra stub that the old
semctl()/__semctl() did, as the SUSv2 version takes variable arguments,
and thus does not require the extra indirection.

Make the END() argument match the entry name.

branches: 1.3.2;
Need an internal name for pipe(2).

branches: 1.2.2;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.20;
libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.4.10;
kill "IMPORT(errno, 4)" since it is unnecessary

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

set the GP before accessing errno.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Treat reboot() like a normal system call. From PR 2458.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Make the END() argument match the entry name.

branches: 1.8.2;
Thinko in previous: we do always use an internal name.

Add internal names for brk() and sbrk().

branches: 1.6.2;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.5.8;
* On architectures using ELF, and conditionally on those in transition, rename
_ASM_LABEL(cerror) and _ASM_LABEL(curbrk) to _C_LABEL(__cerror) and
_C_LABEL(__curbrk) (or their respective architecture-specific equivalents) to
avoid possible name clashes with identifiers used in user applications.
* Do the same for minbrk on all architectures to avoid a GCC-specific (and
on ELF architectures effectively useless) symbol reference renaming in MI code.

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

user better names for local labels, as suggested by Matt Thomas and
slightly tweaked.

be more conservative when setting the gp

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Merge the nathanw_sa branch.

branches: 1.2.4;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.20;
libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Add special treatment of shmat(2).
On m68k ELF calling standard (__SVR4_ABI__), if a function
returns a pointer, the return value should go to a0 as well as d0.

these went to compat

Add __msgctl13(), __semctl13(), and __shmctl13() (symbols are __RENAME()'d
in their respective header files). Add PSEUDO stubs for the old versions
of these system calls.

Note that __semctl13() doesn't require the extra stub that the old
semctl()/__semctl() did, as the SUSv2 version takes variable arguments,
and thus does not require the extra indirection.

these went to compat

Warn about references to the compatibility() sigaction(), sigpending(),
sigprocmask(), sigreturn(), and sigsuspend(), and direct the user to
include <signal.h> to generate the correct reference.

Signal changes for Alpha.

these went to compat

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.3.8;
Warn about references to the compatibility() sigaction(), sigpending(),
sigprocmask(), sigreturn(), and sigsuspend(), and direct the user to
include <signal.h> to generate the correct reference.

Signal changes for Alpha.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

these went to compat

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.4.8;
Warn about references to the compatibility() sigaction(), sigpending(),
sigprocmask(), sigreturn(), and sigsuspend(), and direct the user to
include <signal.h> to generate the correct reference.

Signal changes for Alpha.

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

these went to compat

the WARN_REFERENCES text "include <signal.h> for correct reference" is pointless
as <signal.h> won't help you, so remove it

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.3.8;
Warn about references to the compatibility() sigaction(), sigpending(),
sigprocmask(), sigreturn(), and sigsuspend(), and direct the user to
include <signal.h> to generate the correct reference.

Signal changes for Alpha.

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

these went to compat

fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.4.8;
Warn about references to the compatibility() sigaction(), sigpending(),
sigprocmask(), sigreturn(), and sigsuspend(), and direct the user to
include <signal.h> to generate the correct reference.

Signal changes for Alpha.

catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Rename "syscall" to "_syscall" and provide "syscall" as a weak alias.

branches: 1.2.104;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.1.20;
libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)