Replace uses of endbr64 with _CET_ENDBR from cet.h

cet.h is needed for other platforms to emit the relevant .gnu.properties
sections that are necessary for them to enable IBT. It also avoids issues
with older toolchains on macOS that explode on encountering endbr64.

based on a diff by kettenis
ok beck kettenis

Add endbr64 where needed by inspection. Passes regresson tests.
ok jsing, and kind of tb an earlier version

Use explicit .text instead of .previous to please Windows/MinGW on amd64

ok miod

Use .section .rodata instead of a plain .rodata

At least gcc 12 on Fedora is very unhappy about a plain .rodata and throws
Error: unknown pseudo-op: `.rodata'. So add a .section in front of it to
make it happy.

ok deraadt miod

Move constants out of text segment into rodata to prepare for xonly support
on amd64. no pic handling is neccessary since amd64 has full reach.
ok kettenis

branches: 1.1.1;
Initial revision

Add endbr64 where needed by inspection. Passes regresson tests.
ok jsing, and kind of tb an earlier version

Use explicit .text instead of .previous to please Windows/MinGW on amd64

ok miod

Use .section .rodata instead of a plain .rodata

At least gcc 12 on Fedora is very unhappy about a plain .rodata and throws
Error: unknown pseudo-op: `.rodata'. So add a .section in front of it to
make it happy.

ok deraadt miod

Move constants out of text segment into rodata to prepare for xonly support
on amd64. no pic handling is neccessary since amd64 has full reach.
ok kettenis

branches: 1.1.1;
Initial revision

Use explicit .text instead of .previous to please Windows/MinGW on amd64

ok miod

Use .section .rodata instead of a plain .rodata

At least gcc 12 on Fedora is very unhappy about a plain .rodata and throws
Error: unknown pseudo-op: `.rodata'. So add a .section in front of it to
make it happy.

ok deraadt miod

Move constants out of text segment into rodata to prepare for xonly support
on amd64. no pic handling is neccessary since amd64 has full reach.
ok kettenis

branches: 1.1.1;
Initial revision

Use .section .rodata instead of a plain .rodata

At least gcc 12 on Fedora is very unhappy about a plain .rodata and throws
Error: unknown pseudo-op: `.rodata'. So add a .section in front of it to
make it happy.

ok deraadt miod

Move constants out of text segment into rodata to prepare for xonly support
on amd64. no pic handling is neccessary since amd64 has full reach.
ok kettenis

branches: 1.1.1;
Initial revision

Move constants out of text segment into rodata to prepare for xonly support
on amd64. no pic handling is neccessary since amd64 has full reach.
ok kettenis

branches: 1.1.1;
Initial revision

Import OpenSSL 1.0.1g

import OpenSSL-1.0.1c