Populate the non-LOAD openbsd.syscalls section (and PT_OPENBSD_SYSCALL)
with {uint offset, uint syscall#} entries in libc & ld.so.
In libc a few syscall# entries (break, sigprocmask, _tfork, _threxit

Populate the non-LOAD openbsd.syscalls section (and PT_OPENBSD_SYSCALL)
with {uint offset, uint syscall#} entries in libc & ld.so.
In libc a few syscall# entries (break, sigprocmask, _tfork, _threxit)
are duplicated because additional or inline uses occur (that situation
is handled elsewhere)
ok kettenis

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Use a consistent comment to explain why 32bit archs set their second
return register to -1 in the syscall error path ("for lseek").

removal of the misleading __syscall() mention requested by deraadt

Use a consistent comment to explain why 32bit archs set their second
return register to -1 in the syscall error path ("for lseek").

removal of the misleading __syscall() mention requested by deraadt@
ok deraadt@

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Add _?ENTRY_NB() macro for doing an ASM function entry without
setting the binding to global (NB == "no binding"), as clang 13 is
now warning about changing the binding from global to weak. Use
them

Add _?ENTRY_NB() macro for doing an ASM function entry without
setting the binding to global (NB == "no binding"), as clang 13 is
now warning about changing the binding from global to weak. Use
them for bcopy, brk, and sbrk.

Add the '.L' prefix to internal labels in the bcopy implementation
to remove them from the symbol table

Start using the MI DEFS.h: delete the #defines from powerpc/SYS.h
that the MI DEFS.h provides and switch from SYS.h to DEFS.h in files
that don't do syscalls. Use END_BUILTIN from the MI DEFS.h for ffs.

ok gkoehler@

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Add retguard to macppc kernel locore.S, ofwreal.S, setjmp.S

This changes RETGUARD_SETUP(ffs) to RETGUARD_SETUP(ffs, %r11, %r12)
and RETGUARD_CHECK(ffs) to RETGUARD_CHECK(ffs, %r11, %r12)
to show tha

Add retguard to macppc kernel locore.S, ofwreal.S, setjmp.S

This changes RETGUARD_SETUP(ffs) to RETGUARD_SETUP(ffs, %r11, %r12)
and RETGUARD_CHECK(ffs) to RETGUARD_CHECK(ffs, %r11, %r12)
to show that r11 and r12 are in use between setup and check, and to
pick registers other than r11 and r12 in some kernel functions.

ok mortimer@ deraadt@

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Retguard asm macros for powerpc libc, ld.so

Add retguard to some, but not all, asm functions in libc. Edit SYS.h
in libc to remove the PREFIX macros and add SYSENTRY (more like
aarch64 and powerpc6

Retguard asm macros for powerpc libc, ld.so

Add retguard to some, but not all, asm functions in libc. Edit SYS.h
in libc to remove the PREFIX macros and add SYSENTRY (more like
aarch64 and powerpc64), so we can insert RETGUARD_SETUP after
SYSENTRY. Some .S files in this commit don't get retguard, but do
stop using the old prefix macros.

Tested by deraadt@, who put this diff in a macppc snap.

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Unlike gas, clang's assembler complains about duplicate symbol assignments.
Tweak the PSEUDO() macro to avoid that.

problem noted and tested by kettenis@

TIB conversion is complete, so set errno in the syscall stub and eliminate
__cerror

ok ketternis@

Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an

Use a Thread Information Block in both single and multi-threaded programs.
This stores errno, the cancelation flags, and related bits for each thread
and is allocated by ld.so or libc.a. This is an ABI break from 5.9-stable!

Make libpthread dlopen'able by moving the cancelation wrappers into libc
and doing locking and fork/errno handling via callbacks that libpthread
registers when it first initializes. 'errno' *must* be declared via
<errno.h> now!

Clean up libpthread's symbol exports like libc.

On powerpc, offset the TIB/TCB/TLS data from the register per the ELF spec.

Testing by various, particularly sthen@ and patrick@
ok kettenis@

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Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread
into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between

Merge the sigaction() and sigprocmask() overloads/wrappers from libpthread
into libc, and move pthread_sigmask() as well (just a trivial wrapper).
This provides consistent handling of SIGTHR between single- and multi-threaded
programs and is a step in the merge of all the libpthread overloads, providing
some ASM and Makefile bits that the other wrappers will need.

ok deraadt@ millert@

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Adds hidden _libc_FOO aliases for the system call stubs.
Stop generating _brk and _sbrk symbols: they've already been hidden.
Set the ELF symbol size on the syscall stubs.
Give the __{min,cur}brk sym

Adds hidden _libc_FOO aliases for the system call stubs.
Stop generating _brk and _sbrk symbols: they've already been hidden.
Set the ELF symbol size on the syscall stubs.
Give the __{min,cur}brk symbols a size and type, and hide more jump labels.

ok deraadt@

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Add framework for resolving (pun intended) libc namespace issues, using
wrapper .h files and asm labels to let internal calls resolve directly and
not be overridable or use the PLT. Then, apply that

Add framework for resolving (pun intended) libc namespace issues, using
wrapper .h files and asm labels to let internal calls resolve directly and
not be overridable or use the PLT. Then, apply that framework to most of
the functions in stdio.h, string.h, err.h, and wchar.h. Delete the
should-have-been-hidden-all-along _v?(err|warn)[cx]? symbols while here.

tests clean on i386, amd64, sparc64, powerpc, and mips64

naming feedback from kettenis@ and millert@
ok kettenis@

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Make __cerror() use the per-thread errno location if r2 isn't zero. This way
libpthread no longer has to override it which means that we can use a local
call and can avoid setting up r30 as a _GLOBA

Make __cerror() use the per-thread errno location if r2 isn't zero. This way
libpthread no longer has to override it which means that we can use a local
call and can avoid setting up r30 as a _GLOBAL_OFFSET_TABLE_ pointer, which
is hard the way the powerpc ABI works.

For now we continue to provide __cerror as a weak symbol, but ___cerror is
now protected and internal calls within libc now use ___cerror instead of
__cerror.

discussed with guenther@

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Make pthread_atfork() track the DSO that called it like atexit() does,
unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still ove

Make pthread_atfork() track the DSO that called it like atexit() does,
unregistering callbacks if the DSO is unloaded. Move the callback
handling from libpthread to libc, though libpthread still overrides the
inner call to handle locking and thread-library reinitialization.
Major version bump for both libc and libpthread.

verification that this fixes various ports ajacoutot@
asm assistance miod@; ok millert@ deraadt@

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Apply "unifdef -D__STDC__" to libc/arch/*/SYS.h

A while back, pascal@ converted our system call stubs from using "cpp
| as" to "cc -x assembler-with-cpp", so there's no need to stay
compatible with

Apply "unifdef -D__STDC__" to libc/arch/*/SYS.h

A while back, pascal@ converted our system call stubs from using "cpp
| as" to "cc -x assembler-with-cpp", so there's no need to stay
compatible with ancient preprocessor semantics.

ok miod

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Provide a WEAK_ALIAS macro in <machine/asm.h> for the few platforms
that didn't already have one, and then immediately use it in libc's
SYS.h

ok miod@

cerror -> __cerror as suggested by art, with a couple of missing _ASM_LABEL()
added as appropriate.

We need to keep K&R compat macros for some ports where the assemnbler is
still using -traditional-cpp.

We live in an ANSI C world. Remove lots of gratuitous #ifdef __STDC__ cruft.

change PSEUDO_NOERROR so it is indeed does not set errno.

Add PSEUDO_NOERROR similar to that used by NetBSD.
Some ports were setting errno in PSEUDO and some were not. Now errno
is set for all in PSEUDO and PSEUDO_NOERROR is provided for the
non-errno case

Add PSEUDO_NOERROR similar to that used by NetBSD.
Some ports were setting errno in PSEUDO and some were not. Now errno
is set for all in PSEUDO and PSEUDO_NOERROR is provided for the
non-errno case (only used by _exit).

Needs testing on vax and m88k.
XXX - hppa and powerpc still lack a real PSEUDO_NOERROR implementation.
Currently PSEUDO_NOERROR and PSEUDO are the same (so builds don't
break on those platforms).

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weaken syscall symbols in libc by default

$OpenBSD$

changes required for powerpc libc_r support.

Fixes to the currently unused PIC support in the powerpc asm files.
contact rahnds@openbsd.org before attempting to use this funcationality.

remove PASSTHRU