Retguard addition in commit 72pYktDvmJhq7OyF was based on the understanding
that the removal of the off_t padding, amd64 syscalls no longer passed a 7th
or later argument. We overlooked that syscall

Retguard addition in commit 72pYktDvmJhq7OyF was based on the understanding
that the removal of the off_t padding, amd64 syscalls no longer passed a 7th
or later argument. We overlooked that syscall(2) bumps the arg count by one,
so six argument calls like SYS_sysctl still pass an argument on the stack.

So, repush the 7th argument so it's at the expected stack offset after the
retguard register is pushed.

problem reported and ok bluhm@

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

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

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

Clean up libpthread's symbol exports like libc.

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

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

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Rename SYSEXIT() to SYSCALL_END() for consistency with most other archs.
No change in resulting object files

ok millert@

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

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

ok deraadt@

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Set FUNC symbol sizes of auto-generated and hand-written syscall wrappers.

Original diff from guenther@, adjusted by me.

OK guenther@

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 -DPI

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@

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Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999.
Checked by ian@ and deraadt@

correct syscall() stub; fixes perl and vi.recover

things for amd64; from art@