Tidy up how __sigaction14_sigtramp.c is added to SRCS.

remove various HAVE_GCC=45 fragments.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

ENTRY / END indentation. NFCI.

Fix previous... We need to deal with a conditional branch.

We don't fit anymore thanks to jemalloc:
relocation truncated to fit: R_AARCH64_CONDBR19 against symbol `cerror'

branches: 1.1.4; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Because the PC is not a general purpose register on aarch64, we need
to use DWARF pseudo-register for the signal trampoline return address.

Adjust the style to match other platforms.

Change x30 to lr for ease of reading

NFCI

Decorate the aarch64 signal trampoline with CFI attributes easing unwinding

Now, the unwinders (in backtrace(3) and similar) can unwind properly
the stack from a signal handler.

Don't futz with tpidr_el0 in {set,long}jmp as it breaks TLS as seen in
qemu

branches: 1.1.4; 1.1.28;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

fix long double NaN definition.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

libc: Pacify lint on aarch64.

Add the fpset* routines for tests

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

_REG_LR should be _lwp_exit

need to set _UC_TLSBASE of uc_flags for _lwp_makecontext().
pointed out from skrll@. thanks.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Fix the lib/libc/setjmp/t_setjmp:{,_}longjmp_zero test cases

Don't futz with tpidr_el0 in {set,long}jmp as it breaks TLS as seen in
qemu

branches: 1.3.6;
fix to work
* no need to check x29 != NULL. fp may be NULL.
* don't break in-use register x5.

KNF. use tab

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

fix various typos, mainly in comments, but also log messages, docs, game text.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

libc: Pacify lint on aarch64.

don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Some test programs require these.

libc: Pacify lint on aarch64.

don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Some test programs require these.

don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Some test programs require these.

libc: Pacify lint on aarch64.

don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Add the fpset* routines for tests

fpsetround(3): Don't toggle all the other bits in fpcr on aarch64.

PR port-arm/58782: fpsetround flips all the other fpcsr bits on aarch64

branches: 1.3.2;
libc: Pacify lint on aarch64.

branches: 1.2.16; 1.2.24;
don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Add the fpset* routines for tests

don't use systm.h header, it's not available to userland.

as a side effect, this fixes the evbarm64 build, which was failing due
to a declaration of psize_t physmem in systm.h, while psize_t is
kernel-only.

ok riastradh

branches: 1.1.2;
Add the fpset* routines for tests

fix type of argument for va_arg; don't round to 32bit.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Fix the lib/libc/setjmp/t_setjmp:{,_}longjmp_zero test cases

Don't futz with tpidr_el0 in {set,long}jmp as it breaks TLS as seen in
qemu

branches: 1.2.6;
fix to work
* no need to check x29 != NULL. fp may be NULL.
* don't break in-use register x5.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Fix __siglongjmp14().

Fixes SIGINT causing ksh to "longjmp botch", presumably due to incorrect
magic number.
cvs: ----------------------------------------------------------------------

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Update comments to help explain what's going on

Fix so the setcontext call is via the PLT and libpthread can override

Fix some register names in comments

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

libc: switch aarch64 to use softfloat functions from compiler_rt

The old definitions in qp.c being all grouped together in one file
causes problems when static linking with libgcc (i.e. cc --static-libgcc)
due to functions like __trunctfdf2 conflicting with libgcc, as seen in
PR 57021

We can also add some missing functions like __fixdfti for converting
a double to an int128_t, the lack of which is currently preventing webkit
from linking on aarch64, as seen in PR 57022

Unclear to me if libc is the right place for these functions, but
we can avoid breaking compatibility right now and maintain the status
quo while avoiding some obvious immediate problems.
nm output for libc shows no functions being removed by this change.

delete __{ge,lt,gt,le,eq,ne,unordt}tf2.
these should not be defined in libc.

pointed out by joerg@. thanks.

fix multiple definition of __{ge,lt,gt,le,eq,ne,unordt}tf2 in libc and libgcc.
this fixes the ATF call_once_static, call_once2_static, cxxruntime_static, static_destructor_static.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Summary: Align softfloat float128 with libgcc.

While libgcc adapts its float128 data structure to the endianness of
the architecture, the softfloat code in libc didn't. With both of
them handling the same values, softfloat must follow the toolchain.

OK: riastradh

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

fix condition code. x1==0 is parent.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

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: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

Because the PC is not a general purpose register on aarch64, we need
to use DWARF pseudo-register for the signal trampoline return address.

Adjust the style to match other platforms.

Update the unwinder comment to better reflect ARM64

s/ARM/ARM64/ in comment

Restore SP from mcontext

Improves unwinding of multiple frames without frame pointer.

Change x30 to lr for ease of reading

NFCI

Decorate the aarch64 signal trampoline with CFI attributes easing unwinding

Now, the unwinders (in backtrace(3) and similar) can unwind properly
the stack from a signal handler.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

use adrp not adr, since the data is not pc-rel. fixes brk(2).

branches: 1.1.4; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

return 0xffffffffffffffff (= -1). not 0x00000000ffffffff.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

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: 1.1.4; 1.1.8; 1.1.12;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

lower case 'ret' to avoid macro clash

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

fix a bug. no need postincrement here.

branches: 1.1.4; 1.1.24; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

branches: 1.1.4;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

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

branches: 1.1.4; 1.1.26;
Preliminary files for AARCH64 (64-bit ARM) support.
Enough for a distribution build.

kill this. Just include <machine/asm.h> directly

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

Tidy up how __sigaction14_sigtramp.c is added to SRCS.

branches: 1.20.4;
define and use LIBCDIR in terms of .CURDIR. fixes compat/lib/libc build.

G/c KMSRCS and KMINCLUDES now that we have common/lib/libc

sigtramp1 moved to compat

Don't use 'm4' here. Use $TOOL_M4 instead.

Add current directory to inlcude pathes as it needed for generated assym.h.

Change longjmp to use setcontext instead of sigreturn14. Change setjmp
to use symbolic offsets via assym.h

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

Enable the libc-provided signal trampoline. The old __sigaction14
entry point has been replaced by the new __sigaction14() which is a
wrapper around the __sigaction_sigtramp system call (which is itself
not directly exposed outside of libc).

No shared library version change is necessary; no new symbols
are exposed outside of libc.

Drink ALL the Kool-Aid.

(Move -mieee from lib/ to bsd.*.mk; new var MKIEEEFP defaults to yes.)

On Alpha, build libc and libm with -mieee ... A metric crapload
of 3rd party software expects this.

XXX TODO: consider libm-fast for alpha that is not -mieee. Possibly
determine -mieee or not at run-time based on a bit in the executable
headers.

branches: 1.10.12;
Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add memmove.S to libkern.

Copy up bcopy.S and memcpy.S.

LintAlpha* have been removed.

branches: 1.6.2;
Simplify how division and remainder assembly source is generated
from divrem.m4.

dd a bunch of files to LSRCS, which provide lint stubs for the functions
defined by machine-dependent assembly code.

copy neither DEFS.h (it no longer exists) nor SYS.h (it's never been
necessary in libkern) to libkern any longer.

add an assembly version of ffs().

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

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

* Add WSYSCALL() to SYS.h, which creates a system call with an
internal name and a weak alias for the name.
* Add a WEAKASM syscall list, and process it.
* Make sysarch() have an internal name (_sysarch()).

branches: 1.7.4;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.6.8;
* 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.

Consistency: distinguish between PSEUDO() and PSEUDO_NOERROR().

update for new <machine/asm.h> and generally clean up:
rename SYSCALL_NOLABEL as CALLSYS_ERROR (for consistency with CALLSYS_NOERROR
now in asm.h), and implement it using CALLSYS_NOERROR.
reimplement SYSCALL, RSYSCALL, and PSEUDO to use the appropriate macros.
implement SYSCALL_NOERROR and RSYSCALL_NOERROR to do the same thing as
SYSCALL and RSYSCALL, but without the error checking/handling.

reload GP _before_ error check+branch

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-)

- 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: 1.2.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.30;
Change longjmp to use setcontext instead of sigreturn14. Change setjmp
to use symbolic offsets via assym.h

Add strtof(3) and strtold(3); welcome libc 12.137.

Add machine-dependent definitions for gdtoa.

Add machine-dependent definitions for gdtoa.

remove these, they are no longer necessary or appropriate

branches: 1.2.2;
Add missing stdlib.h include

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.)

Rename ${SRCS.{alpha,arm,...}.gen} to ${LSRCS.{alpha,arm,...}.gen} because
they ended up in ${LSRCS}, not ${SRCS}. ${SRCS.*} namespace will be used
for more useful things. No functional changes intended.

build frexp/ldexp/modf in the "compat" part
(code is identical)

some stuff went to compat

Push back the descriptions of NaN formats, and descriptions of the
distinction between signalling NaNs and quiet NaNs back into the
machine-dependent headers; treat the implementation of __nanf in the
same spirit.

IEEE 754 leaves the distinction between signalling NaNs and quiet NANs
to the implementation, and unlike our headers used to suggest they're
not identical in the interpretation of the fraction's MSb; in due
course, make those of hppa, mips, sh3, and sh5 reflect reality.

branches: 1.18.6;
* Turn isinf(3) and isnan(3) into C99-style macros.
* Make it possible for ports to override these (i.e., VAX).
* Remove isnanl(), which was internal to libc only.

we need a silly trampoline to make _resumecontext work

Add C99 fpclassify(), isfinite(), isnormal(), and signbit() macros.

Add __infinityf and __infinityl, float respectively long double analogs
of __infinity.

* Since there is no single portable IEEE 754 format for a long double,
keep a common implementation of isinfl() and isnanl() to be used by
platforms where `long double' == `double'; move others into
machine-dependent code.
* In due course, consider __VFP_FP__ on arm.

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Build _isinfl() and _isnanl().

Rename ieee754_function.c to function_ieee754.c, following the convention
used in exec_format.c, loadfile_format.c, subsys_machdep.c etc.
Per discussion with Christos.

Add swapcontext() lint stub.

Merge the nathanw_sa branch.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.7.6;
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of
a single-precision quiet NaN; only to be defined on platforms that do support
this value.

Separate isnan() into a separate module, and make isinf()/isnan() use ieee.h.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Signal changes for Alpha.

add entries for the float rounding and exception functions

don't forget inifinity.c

need these for new gen/Makefile

POSIX sez:
The longjmp() function shall not cause setjmp() to return 0; if val
is 0, setjmp() shall return 1.

Fixes the _longjmp_zero and longjmp_zero test cases in the t_setjmp
test on alpha.

branches: 1.7.36;
Remove clearing of ucontext_t, the only random register values now are
argument and scratch registers (which will be reloaded after return anyway).

Save the GP register value and restore it on longjmp.

While formally GP is not a callee-saved register, for static linking
the link time optimization described in section 3.2.3 of the "Calling
Standard for Alpha Systems" allows the caller to rely on GP being the
value needed within setjmp() - and not restore it after return if setjmp
and the call site share a GP value.

This fixes longjmp/setjmp for statically linked programs, e.g. /rescue/csh
or the static tcsh variant from pkgsrc.

branches: 1.5.4; 1.5.8; 1.5.24; 1.5.28; 1.5.30;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.18;
Add missing <compat/include/setjmp.h>

Put the jmpbuf's FPCR in the ucontext, not the other way around.

Fix <tab> nits.

Change longjmp to use setcontext instead of sigreturn14. Change setjmp
to use symbolic offsets via assym.h

Ensure that the stack is always 16-byte aligned by rounding sizes as needed.

All changes from rin@ except swapcontext.S, which is from me (added
symbolic constants to make the code clearer).

- 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.

Use a constant in the text segment to avoid the .lit8 out of range relocation
error.

Save the GP register value and restore it on longjmp.

While formally GP is not a callee-saved register, for static linking
the link time optimization described in section 3.2.3 of the "Calling
Standard for Alpha Systems" allows the caller to rely on GP being the
value needed within setjmp() - and not restore it after return if setjmp
and the call site share a GP value.

This fixes longjmp/setjmp for statically linked programs, e.g. /rescue/csh
or the static tcsh variant from pkgsrc.

branches: 1.5.2; 1.5.4; 1.5.8; 1.5.10;
Use excb before and after the mt_fpcr/mf_fpcr instructions as specified
in the alpha ARM 4.7.8.1 (Accessing the FPCR):

Because Alpha floating-point hardware can overlap the execution of
a number of floating-point instructions, accessing the FPCR must
be synchronized with other floating-point instructions. An EXCB
instruction must be issued both prior to and after accessing the
FPCR to ensure that the FPCR access is synchronized with the
execution of previous and subsequent floating-point instructions;
otherwise synchronization is not ensured.

Use unions to convert between double and uint64_t to avoid casting.

branches: 1.4.54;
Change longjmp to use setcontext instead of sigreturn14. Change setjmp
to use symbolic offsets via assym.h

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.

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.

lib/libc/arch/alpha: Say STACK_ALIGNBYTES, not 0xf, where relevant.

No functional change intended.

PR kern/59327: user stack pointer is not aligned properly

lib/libc/arch/alpha/gen/_lwp.c, makecontext.c: Sort includes.

No functional change intended.

Preparation for tidying for:

PR kern/59327: user stack pointer is not aligned properly

branches: 1.8.4;
Ensure that the stack is always 16-byte aligned by rounding sizes as needed.

All changes from rin@ except swapcontext.S, which is from me (added
symbolic constants to make the code clearer).

Fix the build, _UC_UNIQUE has been renamed _UC_TLSBASE

branches: 1.6.4; 1.6.10;
Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

branches: 1.5.8; 1.5.20;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.18;
Add missing __RCSID()

Make sure we reference getcontext() by its internal name.

Merge the nathanw_sa branch.

branches: 1.1.2;
file _lwp.c was initially added on branch nathanw_sa.

branches: 1.3.8;
add matching END(). found via -Wa,--fatal-warnings

branches: 1.2.30;
blow this up by sticking a copyright notice to it

we need a silly trampoline to make _resumecontext work

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: 1.2.12;
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-)

Use reach-over sources from common/lib/libc

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;
Use insbl to reduce by 1 instruction.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Use reach-over sources from common/lib/libc

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;
Whitespace fix.

Use insbl to reduce by 1 instruction.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

Don't intentionally enable integer overflow traps (ITOH Yasufumi)
Closes port-alpha/10065

branches: 1.8.4;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.7.12;
catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

remove unused local label

deal properly (i hope!) with registers' upper 32 bits, when doing
32-bit division and remainder. Sometimes, when optimizing, they could
have been different than previously expected (and could have caused
hokey results).

kill some now-bogus XXX's

save & restore the argument registers, too. from Trevor Blackwell

strange corner cases:
(1) zero top 32 bits for 32-bit unsigned ops; 32-bit value can
be accidentally(?) sign-extended by the compiler/assembler.
(2) fix return value for mod's that cause traps

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

On ports without __HAVE_LONG_DOUBLE, make fabsl alias fabs.

For some reason, fabs lives in libc, not in libm, and our tests now
detect when fabs or fabsl is missing from libm. For those ports that
sometimes have long double and sometimes don't, make it conditional.

Still missing: fabs _and_ fabsl on ia64. Need help from an itanium
wizard! Other portmasters: Please take a look and see if I missed
any ports that might have long double where this alias will not work.

branches: 1.3.102; 1.3.104;
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-)

defintion -> definition

branches: 1.9.8; 1.9.18;
Use excb before and after the mt_fpcr/mf_fpcr instructions as specified
in the alpha ARM 4.7.8.1 (Accessing the FPCR):

Because Alpha floating-point hardware can overlap the execution of
a number of floating-point instructions, accessing the FPCR must
be synchronized with other floating-point instructions. An EXCB
instruction must be issued both prior to and after accessing the
FPCR to ensure that the FPCR access is synchronized with the
execution of previous and subsequent floating-point instructions;
otherwise synchronization is not ensured.

Use unions to convert between double and uint64_t to avoid casting.

branches: 1.8.42;
__asm__ -> __asm

Add missing __RCSID()

add a cast appease gcc3.3

netbsd.org->NetBSD.org

sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

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

branches: 1.2.10;
Pull in __flt_rounds() prototype.

get & set FP rounding direction. these actually seem to work.

Add missing __RCSID()

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

minor cleanup

branches: 1.2.10;
* New MI man page for fp{set,get}{round,sticky,mask}(3).
* Implement fpgetsticky() for alpha.
* Direct fpsetsticky() and fp{get,set}mask() into alpha kernel via sysarch(2).
* Define new sysarch(2) stub for above and install and distribute sysarch.h
for alpha. (The fpcr IS user mode r/w, but for reasons beyond the scope
of a commit message kernel calls are needed.) And much kernel Magick is
required before these do anything, but this way programs compiled under
1.4 will DTRT on future snapshots and releases.

branches: 1.1.12;
functions to set FP exception masks & sticky exceptions. they abort, for now.

Add some casts to get rid of "bitwise op on signed value is non-portable"
warning from lint.

branches: 1.10.2;
Use excb before and after the mt_fpcr/mf_fpcr instructions as specified
in the alpha ARM 4.7.8.1 (Accessing the FPCR):

Because Alpha floating-point hardware can overlap the execution of
a number of floating-point instructions, accessing the FPCR must
be synchronized with other floating-point instructions. An EXCB
instruction must be issued both prior to and after accessing the
FPCR to ensure that the FPCR access is synchronized with the
execution of previous and subsequent floating-point instructions;
otherwise synchronization is not ensured.

Use unions to convert between double and uint64_t to avoid casting.

branches: 1.9.42;
__asm__ -> __asm

Add missing __RCSID()

add a cast appease gcc3.3

netbsd.org->NetBSD.org

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

remove the trapb ops bracketing mf_fpcr, in this one case they aren't needed

branches: 1.3.4;
sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

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

branches: 1.1.18;
get & set FP rounding direction. these actually seem to work.

branches: 1.9.6;
Backout previous: the license sweep touched these files in error, so
restore the old license.

branches: 1.8.2;
Remove clause 3 and 4 from TNF licenses

Add missing __RCSID()

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

Complete rewrite. Call the new sysarch(ALPHA_FPGETSTICKY, ...).

branches: 1.4.4;
sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

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

branches: 1.2.6;
* New MI man page for fp{set,get}{round,sticky,mask}(3).
* Implement fpgetsticky() for alpha.
* Direct fpsetsticky() and fp{get,set}mask() into alpha kernel via sysarch(2).
* Define new sysarch(2) stub for above and install and distribute sysarch.h
for alpha. (The fpcr IS user mode r/w, but for reasons beyond the scope
of a commit message kernel calls are needed.) And much kernel Magick is
required before these do anything, but this way programs compiled under
1.4 will DTRT on future snapshots and releases.

branches: 1.1.12;
functions to set FP exception masks & sticky exceptions. they abort, for now.

fix old style decls

branches: 1.4.44; 1.4.50;
Add missing __RCSID()

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

branches: 1.2.10;
* New MI man page for fp{set,get}{round,sticky,mask}(3).
* Implement fpgetsticky() for alpha.
* Direct fpsetsticky() and fp{get,set}mask() into alpha kernel via sysarch(2).
* Define new sysarch(2) stub for above and install and distribute sysarch.h
for alpha. (The fpcr IS user mode r/w, but for reasons beyond the scope
of a commit message kernel calls are needed.) And much kernel Magick is
required before these do anything, but this way programs compiled under
1.4 will DTRT on future snapshots and releases.

branches: 1.1.12;
functions to set FP exception masks & sticky exceptions. they abort, for now.

Add some casts to get rid of "bitwise op on signed value is non-portable"
warning from lint.

branches: 1.11.2;
Use excb before and after the mt_fpcr/mf_fpcr instructions as specified
in the alpha ARM 4.7.8.1 (Accessing the FPCR):

Because Alpha floating-point hardware can overlap the execution of
a number of floating-point instructions, accessing the FPCR must
be synchronized with other floating-point instructions. An EXCB
instruction must be issued both prior to and after accessing the
FPCR to ensure that the FPCR access is synchronized with the
execution of previous and subsequent floating-point instructions;
otherwise synchronization is not ensured.

Use unions to convert between double and uint64_t to avoid casting.

branches: 1.10.42;
__asm__ -> __asm

Add missing __RCSID()

add a cast appease gcc3.3

netbsd.org->NetBSD.org

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

tweak barrier ops some more

Delete the trapb ops bracketing mf_fpcr, they aren't needed.
Change the trapb ops bracketing mt_fpcr to excb ops.

branches: 1.3.4;
sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

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

branches: 1.1.18;
get & set FP rounding direction. these actually seem to work.

fix old style decls

branches: 1.4.44; 1.4.50;
Add missing __RCSID()

Add internal names for fp{get,set}{mask,round,sticky}(), and
externally-visible weak aliases for the internal names.

branches: 1.2.10;
* New MI man page for fp{set,get}{round,sticky,mask}(3).
* Implement fpgetsticky() for alpha.
* Direct fpsetsticky() and fp{get,set}mask() into alpha kernel via sysarch(2).
* Define new sysarch(2) stub for above and install and distribute sysarch.h
for alpha. (The fpcr IS user mode r/w, but for reasons beyond the scope
of a commit message kernel calls are needed.) And much kernel Magick is
required before these do anything, but this way programs compiled under
1.4 will DTRT on future snapshots and releases.

branches: 1.1.12;
functions to set FP exception masks & sticky exceptions. they abort, for now.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.4.10;
Trivial KNF.

Make the C version of frexp() consitent across platforms, and handle the
Inf/NaN case.

Just some minor cleanup.

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

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.6.4;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.5.2;
Fix unaligned accesses more correctly.

Fix unaligned accesses.

delint

const poisoning.

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

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.5.6;
Delint.

Separate isnan() into a separate module, and make isinf()/isnan() use ieee.h.

delint

Need internal names for isinf() and isnan().

branches: 1.1.2;
libc support for the alpha. more functions should be written in assembler,
but that's optimization. 8-)

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.2.6;
Delint.

Separate isnan() into a separate module, and make isinf()/isnan() use ieee.h.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Fix -Wshadow warnings.

branches: 1.9.10;
Another microoptimization. Take advantage of the addition already having set
the flags for the <=0 comparison.

Reuse the trick of loading 0.0 (rather than 1.0) and then modifying the
exponent. It's a bit faster on some machines.

Remove more unused mulexp variables.

ldexp(denormal, exp>1023) would generate the wrong result in all non-overflow
cases. Totally rework this code to fix this bug *and* make it faster.

Don't ever return -0.0.

Minor style change.

Sync with SPARC version.

Just some minor cleanup.

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

lib/libc/arch/alpha: Say STACK_ALIGNBYTES, not 0xf, where relevant.

No functional change intended.

PR kern/59327: user stack pointer is not aligned properly

lib/libc/arch/alpha/gen/_lwp.c, makecontext.c: Sort includes.

No functional change intended.

Preparation for tidying for:

PR kern/59327: user stack pointer is not aligned properly

branches: 1.7.4;
Ensure that the stack is always 16-byte aligned by rounding sizes as needed.

All changes from rin@ except swapcontext.S, which is from me (added
symbolic constants to make the code clearer).

Explicitly add back __resumecontext wrapper

Mark _resumecontext as dead. ANSIfy all declarations for it.

branches: 1.4.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.30;
we need a silly trampoline to make _resumecontext work

Merge the nathanw_sa branch.

branches: 1.1.2;
file makecontext.c was initially added on branch nathanw_sa.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

branches: 1.3.4;
fix up NetBSD RCS Ids to match the standard, and the leading comment as
to match as well. No functional changes.

branches: 1.2.2;
Fix doubled 'the's.

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

Make NAN a compile time constant (with help from the compiler). Suggested
by krister. Fixes PR 40695.
Make references to the old construct (which we can't remove for binary
compatibility reasons) emit a linker warning.

branches: 1.4.2; 1.4.32;
Push back the descriptions of NaN formats, and descriptions of the
distinction between signalling NaNs and quiet NaNs back into the
machine-dependent headers; treat the implementation of __nanf in the
same spirit.

IEEE 754 leaves the distinction between signalling NaNs and quiet NANs
to the implementation, and unlike our headers used to suggest they're
not identical in the interpretation of the fraction's MSb; in due
course, make those of hppa, mips, sh3, and sh5 reflect reality.

Clean up some rampant code duplication wrt ieee number handling:
- Add alignment-safe double and float unions.
- Use the above for the __infinity and __nan constants on all
architectures that use the standard ieee754 representation of
those constants.
- Add a single copy of various ieee754 math functions (frexp, isinf,
isnan, ldexp and modf) that had numerous duplicates among the
arch-specific directories.
- Use the above functions on all architectures where the generic C
versions where used. Architectures that had local assembly
routines are untouched (for those functions only).

Align __nanf[] object with (sigh) gnuisms

branches: 1.1.6;
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of
a single-precision quiet NaN; only to be defined on platforms that do support
this value.

Mark _resumecontext as dead. ANSIfy all declarations for it.

branches: 1.4.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.16;
-check for a NULL uc_link before calling setcontext(2); do a real exit(3)
instead with exit handlers and all that
-If setcontext(2) returns (which it shouldn't), do an _exit(-1) rather
than relying on a sensible return value to use as exit code. Makes
it less likely that an ucontext corruption goes unnoticed.

Merge the nathanw_sa branch.

branches: 1.1.2;
file resumecontext.c was initially added on branch nathanw_sa.

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;
Make setjmp() work again after the changes to sigaltstack().

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

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-)

Ensure that the stack is always 16-byte aligned by rounding sizes as needed.

All changes from rin@ except swapcontext.S, which is from me (added
symbolic constants to make the code clearer).

- 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 swapcontext.S was initially added on branch nathanw_sa.

Move the Alpha _mcount() into a .S file so that it can be
pre-processed, like other Alpha assembly files.

Use reach-over sources from common/lib/libc

Move the Alpha _mcount() into a .S file so that it can be
pre-processed, like other Alpha assembly files.

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.)

Rename ${SRCS.{alpha,arm,...}.gen} to ${LSRCS.{alpha,arm,...}.gen} because
they ended up in ${LSRCS}, not ${SRCS}. ${SRCS.*} namespace will be used
for more useful things. No functional changes intended.

Rework how dependency generation is performed:

* DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES.
This is a change of behaviour. If a Makefile wants the clean semantics
it must specifically append to CLEANFILES.
Resolves PR toolchain/5204.

* To recap: .d (depend) files are generated for all files in SRCS and DPSRCS
that have a suffix of: .c .m .s .S .C .cc .cpp .cxx

* If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES

* Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} *.d depend upon ${DPSRCS}

* Deprecate the (short lived) DEPENDSRCS


Update the various Makefiles to these new semantics; generally either
adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing
specific .o dependencies with DPSRCS entries.

Tested with "make -j 8 distribution" and "make distribution".

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

need these now, with new net Makefile.inc

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

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

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

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

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Move the bswap functions from libutil to libc (this bups the
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.

add assembler versions of the byte swap macros (only compile ntoh and
hton variants, not byte_swap variants, which are just included), and
copy them to libkern when appropriate.

Add the 'abs', 'div' and 'erand48' sources to stdlib/Makefile.inc.
Change the arch files only include the .S files.
This adds imaxdiv() to some archs where it was missing.

branches: 1.4.6;
Add C99 functions imaxabs and imaxdiv.

branches: 1.3.20;
build erand48_ieee754.c on everything but vax

Add ISO C99 long long integer general utility interfaces; partially addresses
PR standards/9482.

branches: 1.1.2;
A foolish consistency... gen, net, and string all get MD sources
specified by including a Makefile.inc from the appropriate MD directory.
stdlib doesn't do that, but there's no reason that it shouldn't (and
it'd be nice to eliminate the 'if's from the MI stdlib Makefile.inc).

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.)

If SRCS contains any .S files then remove the corresponding .c file from
SRCS and add to LSRCS (for lint).
Change the 'string' Makefiles so that the arch/*/string/Makefile.inc
need only specify the .S files for that architecture and not the .c
files for all the files they don't override.

Remove references to index.c and rindex.c (strchr.c and strrchr.c
now provide the definitions).

add an assembly version of ffs().

fast(!) bzero(), by Trevor Blackwell.

bcopy is now a .S, add memcpy.S and memmove.S

Separate machine dependencies.

Use reach-over sources from common/lib/libc

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

branches: 1.3.12;
catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

return dest string pointer, not source string pointer!

Alpha assembly language bcopy(), written by Trevor Blackwell
<tlb@eecs.harvard.edu>. I added support for using it as memcpy()
and memmove(), by compiling with the appropriate options.

Use reach-over sources from common/lib/libc

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

fast(!) bzero(), by Trevor Blackwell.

Use reach-over sources from common/lib/libc

netbsd.org->NetBSD.org

sweep of my licenses (userland files w/o only my copyright) for
consistency. (no functional changes)

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

branches: 1.3.12;
catch up with <machine/asm.h> changes, SYS.h changes, and the removal
of DEFS.h

pull up bug fix from libkern:
>frob the mask so that only the low set bit is set, to avoid lossage.

add an assembly version of ffs().

Use reach-over sources from common/lib/libc

stubs to define things, and include the bcopy source

Use reach-over sources from common/lib/libc

stubs to define things, and include the bcopy source

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