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.