Tidy up how __sigaction14_sigtramp.c is added to SRCS.

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.2.64;
build __sigaction14_sigtramp.c

ppc64 build framework first pass

Replace the branch to __cerror() in powerpc64 syscall stubs
with inline code which does what __cerror() was doing. #ifdef
that code (i.e. all code) out of cerror.S; __cerror() is no more.
This seems to be necessary to fix the link of rescue/rescue, and
should have the pleasant side effect of making all other workarounds
done to keep the 'b __cerror' working unnecessary.

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.2.24;
add a nop to provide enough space for the linker and long calls.
fixes link errors with 'cerror' and libposix.

from dennis.c.ferguson@gmail.com in PR#43010.

ppc64 build framework first pass

branches: 1.1.2;
Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

ppc64 build framework first pass

ppc64 build framework first pass

ppc64 build framework first pass

libc/arch: Fix copy-paste; or1k, powerpc64, riscv are not powerpc ;)

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.

Add missing ppc64 elements

This is a new port - don't ever start with frexp/ldexp/modf in libc, we
have it in libm already.

ppc64 build framework first pass

Consistently pass 0 as first and ignored argument to sigprocmask in the
setjmp implementations.

NFCI.

Trailing whitespace

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.2.24;
Based on input from Eduardo Horvath (eeh@), replace 'stmd' and 'lmd',
which apparently don't exist as instructions, with a sequence of
std / ld instructions.

Also remove the attempted include of ldstm.S which we don't have.

branches: 1.1.30;
Add missing ppc64 elements

Consistently pass 0 as first and ignored argument to sigprocmask in the
setjmp implementations.

NFCI.

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.2.24;
replace kernel-only 'stmd' and 'lmd' operations in userland with equivalent
sequences of code, as done in eg, powerpc64/gen/_setjmp.S rev 1.2.

from dennis.c.ferguson@gmail.com in PR#43009.

Add missing ppc64 elements

fix lint.

branches: 1.2.44; 1.2.50;
adjust casts for LP64

ppc64 build framework first pass

Finish ppc64 conversion

ppc64 build framework first pass

powerpc64 needs fabsl too. (Apparently no __HAVE_LONG_DOUBLE?)

branches: 1.2.84; 1.2.86;
fix typo

ppc64 build framework first pass

Call libc's fpgetround.

branches: 1.1.64;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.2.18;
Adjust types and casts for LP64 compilation.
Split "long *sp;" into "__greg_t sp, *spp;", which reduces the cast
density and could be used to clean up the ppc32 version as well.

ppc64 build framework first pass

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: 1.1.30;
ppc64 build framework first pass

Mark _resumecontext as dead. ANSIfy all declarations for it.

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

branches: 1.2.10;
Sync all resumecontext.c versions with the changes originally made
by Matthias Drochner to i386 and alpha:

-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.

branches: 1.1.4;
ppc64 build framework first pass

[] -> ()

setcontext() used to be incompatible with -lpthread since it affected
the TLS pointer, therefore wrecking the pthread environement.

Some ports had _UC_TLSBASE flag or equivalent (_UC_UNIQUE on alpha)
that controlled whether setcontext() would change the TLS pointer.
This change let libpthread override setcontext() with its own version
that unsets _UC_TLSBASE, enabling safe usage of setcontext() with
-lpthread.

We also have the following required changes here:
- rename alpha's _UC_UNIQUE into _UC_TLSBASE
- add _UC_TLSBASE definition in header file for all ports
(powerpc, sh3, sparc and sparc64 lack the implementation for now)
- introduce a libc stub that can be overriden for setcontext()
- modify MD libcs swapcontext() implementations so that they use the
setcontext() libc stub instead of doing a plain system call.

While we are there:
- document various MD _UC_* flags in header file
- add libc and libpthread tests for swapcontext() behavior
(hopefully helpful to spot MD problems introduced with this change)

Future work:
- Deciding whether kernel support or _UC_TLSBASE should be added for
powerpc, sh3, sparc and sparc64 is left to portmasters
sparc64

Approved by core@

branches: 1.3.4; 1.3.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.2.18;
revise for ppc64

ppc64 build framework first pass

Use __arraycount(), and cast to u_int.

branches: 1.1.44; 1.1.50;
ppc64 build framework first pass

ppc64 build framework first pass

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: 1.2.6;
Add C99 functions imaxabs and imaxdiv.

branches: 1.1.20;
ppc64 build framework first pass

Change NO_SRCS lines to specify .S in order to exclude the .c file from
SRCS but add it to LSRCS (sort of makes sense!).

bzero.S defines memset(), so exclude memset.c

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).

bzero() and memset() for ppc64.

ppc64 build framework first pass

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

branches: 1.3.18;
rcsid & white space

bzero() and memset() for ppc64.

ppc64 build framework first pass

Add missing sigaction()

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
ppc64 build framework first pass

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: 1.2.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.18;
Add missing sigaction()

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.3.24;
Kill _NOREGNAMES. Everything should be using %rX now. If it doesn't it
soon will.

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

branches: 1.1.18;
ppc64 build framework first pass

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

branches: 1.2.16;
Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
we need the current vfork

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.4.20;
Everything else uses PIC branches to __cerror except those two...

fix @toc reference macro

rewrite for ppc elf64 reloc

ppc64 build framework first pass

Replace the branch to __cerror() in powerpc64 syscall stubs
with inline code which does what __cerror() was doing. #ifdef
that code (i.e. all code) out of cerror.S; __cerror() is no more.
This seems to be necessary to fix the link of rescue/rescue, and
should have the pleasant side effect of making all other workarounds
done to keep the 'b __cerror' working unnecessary.

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.5.4;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.2;
PowerPC doesn't have CERROR since it never had a.out.
Use _C_LABEL(__cerror) instead.

Make __cerror protected to restore ABI leak in older libc versions,
where e.g. librt referenced the copy from libc. This still allows libc
to use PC-relative jumps.

branches: 1.2.2; 1.2.4;
Sync with other ports: in PIC mode make __cerror hidden; it is not supposed
to be used outside libc.

ppc64 build framework first pass

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: 1.1.68; 1.1.72;
ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.4.20;
Everything else uses PIC branches to __cerror except those two...

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

branches: 1.2.18;
convert PIC linkage

ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.2.4;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.1.44; 1.1.50;
ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

Spell LdAddr consistently

branches: 1.3.64;
fix @toc reference macro

convert remaining ppc32 code to ppc64

ppc64 build framework first pass

ppc64 build framework first pass

Minimize differences between powerpc and powerpc64
Fix powerpc64 assembly to use right instructions for 64bit CPUs.
Use hidden for __curbrk and __minbrk to avoid GOT/TOC relocations.

branches: 1.1.64;
ppc64 build framework first pass