src/libexec/rtld-elf/mips, branch main

rtld: remove mips arch directory

2022-01-06T04:00:39+00:00

Reviewed by:	imp
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D33763

TLS: Use for libc and rtld.

2021-12-09T21:23:05+00:00

- Include  in MD rtld_machdep.h headers.

- Remove local definitions of TLS_* constants from rtld_machdep.h
  headers and libc using the values from  instead.

- Use _tcb_set() instead of inlined versions in MD
  allocate_initial_tls() routines in rtld.  The one exception is amd64
  whose _tcb_set() invokes the amd64_set_fsbase ifunc.  rtld cannot
  use ifuncs, so amd64 inlines the logic to optionally write to fsbase
  directly.

- Use _tcb_set() instead of _set_tp() in libc.

- Use '&_tcb_get()->tcb_dtv' instead of _get_tp() in both rtld and libc.
  This permits removing _get_tp.c from rtld.

- Use TLS_TCB_SIZE and TLS_TCB_ALIGN with allocate_tls() in MD
  allocate_initial_tls() routines in rtld.

Reviewed by:	kib, jrtc27 (earlier version)
Differential Revision:	https://reviews.freebsd.org/D33353

mips: Add TLS_DTV_OFFSET to the result of tls_get_addr_common.

2021-12-09T21:16:19+00:00

Previously TLS_DTV_OFFSET was added to the offset passed to
tls_get_addr_common; however, this approach matches powerpc and RISC-V
and better matches the intention.

Reviewed by:	kib, jrtc27
Sponsored by:	The University of Cambridge, Google Inc.
Differential Revision:	https://reviews.freebsd.org/D33347

mips: Rename TLS_DTP_OFFSET to TLS_DTV_OFFSET.

2021-12-09T21:16:00+00:00

This is the more standard name for the bias of dtv pointers used on
other platforms.  This also fixes a few other places that were using
the wrong bias previously on MIPS such as dlpi_tls_data in struct
dl_phdr_info and the recently added __libc_tls_get_addr().

Reviewed by:	kib, jrtc27
Sponsored by:	The University of Cambridge, Google Inc.
Differential Revision:	https://reviews.freebsd.org/D33346

rtld: Remove calculate_tls_end

2021-08-16T10:55:35+00:00

Variant I architectures use off and Variant II ones use size + off.
Define TLS_VARIANT_I/TLS_VARIANT_II symbols similarly to how libc
handles it.

Reviewed by:	kib
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D31539
Differential revision:	https://reviews.freebsd.org/D31541

rtld: use _get_tp() in __tls_get_addr()

2021-04-09T20:46:24+00:00

This eliminates some non-trivial amount of code duplication, where done.
Only x86 and mips are handled right now.

Tested by:      bdragon (powerpc), mhorne (riscv)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29623

rtld: define TLS_DTV_OFFSET on all architectures

2021-04-09T20:46:24+00:00

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29623

rtld-elf(1): remove obsolete pre_init() hook

2020-12-25T18:47:46+00:00

It's no longer used since 600ee699ed2805894f5972c6ac2c3d17dca7f6ce
and r358358 respectively.

Align initial-exec TLS segments to the p_vaddr % align.

2020-04-19T09:28:59+00:00

This is continuation of D21163/r359634, which handled the alignment
for global mode.

Non-x86 arches are not handled, maintainers are welcomed.

Tested by:	emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D24366

Handle non-plt IRELATIVE relocations, at least for x86.

2020-02-13T23:42:09+00:00

lld 10.0 seems to generate this relocation for rdtsc_mb() ifunc in our libc.

Reported, reviewed, and tested by:	dim (amd64, previous version)
Discussed with:	emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D23652