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

Move all data from .text section to .rodata, and update the code to
fetch them correctly when building PIC.

ok kettenis@

_C_LABEL() and _ASM_LABEL() are no longer useful in the "everything
is ELF" world. Eliminate use of them in amd64, arm64, armv7, i386,
macppc, mips64, and sparc64 code.

ok deraadt@ jca@ krw@

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

This first pass does amd64 and sparc64 and pulls DEFS.h out of the
per-arch directory to a common directory; others to follow

ok kettenis@

Make brk() and sbrk() weak again as intended.

Apparently spotted by mortimer@ while working on clang 13 and amd64.
No actual change on sparc64 as this architecture still uses ld.bfd.
ok kettenis@

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

ok deraadt@

Hide many (194!) symbols that nothing should be using.
Delete exect(2); it wasn't portable across archs and nothing used it.

ports test build by naddy@
ok deraadt@ kettenis@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

Use an unsigned comparison against minbrk.

ok deraadt@

branches: 1.3.2;
Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

branches: 1.2.8;
Rename __minbrk to minbrk to allow gmon.c to link correctly.
XXX - The fix should be the other way around - make all other archs match
sparc64.

brk from NetBSD

Move all data from .text section to .rodata, and update the code to
fetch them correctly when building PIC.

ok kettenis@

_C_LABEL() and _ASM_LABEL() are no longer useful in the "everything
is ELF" world. Eliminate use of them in amd64, arm64, armv7, i386,
macppc, mips64, and sparc64 code.

ok deraadt@ jca@ krw@

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

This first pass does amd64 and sparc64 and pulls DEFS.h out of the
per-arch directory to a common directory; others to follow

ok kettenis@

Make brk() and sbrk() weak again as intended.

Apparently spotted by mortimer@ while working on clang 13 and amd64.
No actual change on sparc64 as this architecture still uses ld.bfd.
ok kettenis@

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

ok deraadt@

Hide many (194!) symbols that nothing should be using.
Delete exect(2); it wasn't portable across archs and nothing used it.

ports test build by naddy@
ok deraadt@ kettenis@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

Use an unsigned comparison against minbrk.

ok deraadt@

branches: 1.3.2;
Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

branches: 1.2.8;
Rename __minbrk to minbrk to allow gmon.c to link correctly.
XXX - The fix should be the other way around - make all other archs match
sparc64.

brk from NetBSD

_C_LABEL() and _ASM_LABEL() are no longer useful in the "everything
is ELF" world. Eliminate use of them in amd64, arm64, armv7, i386,
macppc, mips64, and sparc64 code.

ok deraadt@ jca@ krw@

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

This first pass does amd64 and sparc64 and pulls DEFS.h out of the
per-arch directory to a common directory; others to follow

ok kettenis@

Make brk() and sbrk() weak again as intended.

Apparently spotted by mortimer@ while working on clang 13 and amd64.
No actual change on sparc64 as this architecture still uses ld.bfd.
ok kettenis@

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

ok deraadt@

Hide many (194!) symbols that nothing should be using.
Delete exect(2); it wasn't portable across archs and nothing used it.

ports test build by naddy@
ok deraadt@ kettenis@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

Use an unsigned comparison against minbrk.

ok deraadt@

branches: 1.3.2;
Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

branches: 1.2.8;
Rename __minbrk to minbrk to allow gmon.c to link correctly.
XXX - The fix should be the other way around - make all other archs match
sparc64.

brk from NetBSD

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

This first pass does amd64 and sparc64 and pulls DEFS.h out of the
per-arch directory to a common directory; others to follow

ok kettenis@

Make brk() and sbrk() weak again as intended.

Apparently spotted by mortimer@ while working on clang 13 and amd64.
No actual change on sparc64 as this architecture still uses ld.bfd.
ok kettenis@

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

ok deraadt@

Hide many (194!) symbols that nothing should be using.
Delete exect(2); it wasn't portable across archs and nothing used it.

ports test build by naddy@
ok deraadt@ kettenis@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

Use an unsigned comparison against minbrk.

ok deraadt@

branches: 1.3.2;
Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

branches: 1.2.8;
Rename __minbrk to minbrk to allow gmon.c to link correctly.
XXX - The fix should be the other way around - make all other archs match
sparc64.

brk from NetBSD

Make brk() and sbrk() weak again as intended.

Apparently spotted by mortimer@ while working on clang 13 and amd64.
No actual change on sparc64 as this architecture still uses ld.bfd.
ok kettenis@

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

ok deraadt@

Hide many (194!) symbols that nothing should be using.
Delete exect(2); it wasn't portable across archs and nothing used it.

ports test build by naddy@
ok deraadt@ kettenis@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

Use an unsigned comparison against minbrk.

ok deraadt@

branches: 1.3.2;
Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

branches: 1.2.8;
Rename __minbrk to minbrk to allow gmon.c to link correctly.
XXX - The fix should be the other way around - make all other archs match
sparc64.

brk from NetBSD