crt0 uses a helper function in a MD src/libexec/ld.so .h file (rather than
reproducing the relevant defines and code in a different place) to perform
minor relocations. If things go very wrong, it would call _dl_exit() --
a locally defined crt0 function which is syscall exit(2). We don't need
to call exit(2) for this obscure case which doesn't happen and provides no
debugging information. An 'abort' is going to provide better information.
So let's change the function name to _dso_abort() and make it a single
illegal instruction.
ok guenther

Nothing depends on archdep.h pulling in other #includes anymore,
so delete the #includes and hide the RELOC_* functions that are
only used by lib/csu behind "#ifdef RCRT0"

matches the others and it's hard to see how it will fail

Delete all the no-op RELOC_GOT() macros and their uses.
Annotate RELOC_DYN() on non-hppa as only used in lib/csu.
Delete some inconsistent comments, adjust whitespace, and reorder
mips64's archdep.h so that the ld.so/*/archdep.h files look
(almost) the same.

ok visa@ kettenis@

Prefer the size-independent ELF identifiers over the size-specific ones.
Strip superfluous parens from return statements while here.

Done programatically with two perl invocations

idea ok kettenis@ drahn@
ok visa@

Make alpha less special: _dl_boot_bind() is written to complete
relocation of ld.so's GOT without using it, so _reloc_alpha_got()
merely made the call to _dl_boot_bind() from asm simpler...while
itself being a call that required special handling.

diff and muild baking by miod@
ok guenther@

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.

Nothing depends on archdep.h pulling in other #includes anymore,
so delete the #includes and hide the RELOC_* functions that are
only used by lib/csu behind "#ifdef RCRT0"

matches the others and it's hard to see how it will fail

Delete all the no-op RELOC_GOT() macros and their uses.
Annotate RELOC_DYN() on non-hppa as only used in lib/csu.
Delete some inconsistent comments, adjust whitespace, and reorder
mips64's archdep.h so that the ld.so/*/archdep.h files look
(almost) the same.

ok visa@ kettenis@

Prefer the size-independent ELF identifiers over the size-specific ones.
Strip superfluous parens from return statements while here.

Done programatically with two perl invocations

idea ok kettenis@ drahn@
ok visa@

Make alpha less special: _dl_boot_bind() is written to complete
relocation of ld.so's GOT without using it, so _reloc_alpha_got()
merely made the call to _dl_boot_bind() from asm simpler...while
itself being a call that required special handling.

diff and muild baking by miod@
ok guenther@

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.

Delete all the no-op RELOC_GOT() macros and their uses.
Annotate RELOC_DYN() on non-hppa as only used in lib/csu.
Delete some inconsistent comments, adjust whitespace, and reorder
mips64's archdep.h so that the ld.so/*/archdep.h files look
(almost) the same.

ok visa@ kettenis@

Prefer the size-independent ELF identifiers over the size-specific ones.
Strip superfluous parens from return statements while here.

Done programatically with two perl invocations

idea ok kettenis@ drahn@
ok visa@

Make alpha less special: _dl_boot_bind() is written to complete
relocation of ld.so's GOT without using it, so _reloc_alpha_got()
merely made the call to _dl_boot_bind() from asm simpler...while
itself being a call that required special handling.

diff and muild baking by miod@
ok guenther@

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.

Prefer the size-independent ELF identifiers over the size-specific ones.
Strip superfluous parens from return statements while here.

Done programatically with two perl invocations

idea ok kettenis@ drahn@
ok visa@

Make alpha less special: _dl_boot_bind() is written to complete
relocation of ld.so's GOT without using it, so _reloc_alpha_got()
merely made the call to _dl_boot_bind() from asm simpler...while
itself being a call that required special handling.

diff and muild baking by miod@
ok guenther@

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.

Make alpha less special: _dl_boot_bind() is written to complete
relocation of ld.so's GOT without using it, so _reloc_alpha_got()
merely made the call to _dl_boot_bind() from asm simpler...while
itself being a call that required special handling.

diff and muild baking by miod@
ok guenther@

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.

Use <elf.h> instead of <elf_abi.h>

ok jasper@, jca@, deraadt@

On fatal errors, kill ourselves with thrkill(0,9,NULL) instead of
simply exiting, via helper functions _dl_die(), _dl_diedie(), and
_dl_oom().

prompted by a complaint from jsing@
ok jsing@ deraadt@

Delete ancient macros and unnecessary #includes

ok deraadt@

Remove dependency on __got_{start,end} symbols and look at PT_GNU_RELRO
instead. Result in a few more pages that aren't writable on some platforms
(such as hppa). Based on an initial diff from guenther@.

Thanks to deraadt@ for testing.

ok guenther@

Simplify the relocation code for the ld.so bootstrap and static pie: track
just the dynamic tags are needed instead of reusing the generic elf_object_t
structure.

testing and feedback from miod@
ok kettenis@

Make ld.so process only R_ALPHA_RELATIVE relocations during early GOT
relocation in _reloc_alpha_got(), and teach RELOC_RELA() to skip R_ALPHA_NONE
relocations (which are just nops used to fill out the relocation table).
Handling R_ALPHA_NONE relocations will be necessary for static PIE support
and it is not inconceivable that ld.so will end up with such relocations
at some point.

ok kurt@

Eliminate RTLD_PROTECT_PLT: ld.so is built with -Bsymbolic so the
PLT is empty/unused. On at least macppc and sparc64, ld.so's attempt
to mprotect its PLT could instead hit its own allocated data and
cause a segfault shortly there after.

While here, take a shot at preventing the same issue with the GOT
by checking for __got_start != __got_end.

reproduction *with ktracing* by afresh1@ provided the key data
ok miod@ deraadt@

It's been a quarter century: we can assume volatile is present with that name.

Fix handling of hppa RELOC_IPLT relocations during 'bootstrap relocation'.

ok miod@, deraadt@, jsing@

Change define used to deal with PLT protection, use postive logic not negative.
ok mickey@

changes to ld.so to be compatible with newer binutils, requires
slight changes in the startup code on most archs. ok art@ brad@

pefo 3/4 licence cleanups

After relocation is completed, remove write protection from GOT/PLT in ld.so.

Some small fixes in MI code for mips backport. A new reloc md function,
RELOC_GOT, was added to handle mips got bootstrap reloc.

Also remove workaround used on previous versions of binutils for mips.

Add support for REL type relocations, all currently supported arch
use only RELA type relocations, but that could change. ok art@

various KNF

cleanup of MD/MI ld.so (elf), most changes by art@ cleanup by me.
tested on alpha sparc64 powerpc.

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

Cleanup.
exit when the bootstrap relocation fails.

Correctly implement most linking for alpha.
Remove a lot of code copied from powerpc.

Commit initial alpha bits, to facilitate in-tree dev.
This code is not yet working.