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

Inline RELOC_* into boot_md.c and simplify the code based on what
we can verify at build time. Track dt_pltgot as an Elf_Addr instead
of an Elf_Addr* to eliminat casts on both setting and using. Set
RELATIVE_RELOC so the ld.so Makefile can verify that it has just
the relocation types we expect.

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"

Tested with full build.

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@

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@

_dl_exit() is __dead, so it should return void.
Move _dl_mmap() and _dl_mquery() inlines from archdep.h to syscall.h and
remove pointless casts and unnecessary parens.

ok kettenis@

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@

fix types for mmap wrappers. A few whitespace cleanups snuck in.
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@

Only i386 needs mquery; delete the static inlines from amd64 and hppa

Remove some leftover bits that are no longer necessary now that we no
longer call atexit(4) directly on hppa.

Complete the prototype in a function cast to quiet a gcc warning

ok deraadt@

Correctly process RELOC_DIR32 while relocating ld.so itself; this allow
global data initializers to work as intended.
ok drahn kettenis@

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

ok miod@, deraadt@, jsing@

Improve support for shared libs linked at non-zero addreses:
- rename private values in struct elf_object to better
describe their meaning:
s/load_offs/obj_base/ "object's address '0' base"
s/load_addr/load_base/ "The base address of the loadable
segments"
- gdb needs the obj_base value so swap positions with load_base in
struct elf_object
- fix a few occurrences of where load_base was used instead of
obj_base.

With help and okay drahn@

Rework symbol lookup to more closely match sun's documentation, now
treats dlopens as load groups. ok kurt@

fixup the dlsym() return to produce a callable address (plabel) and move one comment closer to the code it talks about earlier; drahn@ ok

md parts for hppa

Inline RELOC_* into boot_md.c and simplify the code based on what
we can verify at build time. Track dt_pltgot as an Elf_Addr instead
of an Elf_Addr* to eliminat casts on both setting and using. Set
RELATIVE_RELOC so the ld.so Makefile can verify that it has just
the relocation types we expect.

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"

Tested with full build.

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@

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@

_dl_exit() is __dead, so it should return void.
Move _dl_mmap() and _dl_mquery() inlines from archdep.h to syscall.h and
remove pointless casts and unnecessary parens.

ok kettenis@

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@

fix types for mmap wrappers. A few whitespace cleanups snuck in.
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@

Only i386 needs mquery; delete the static inlines from amd64 and hppa

Remove some leftover bits that are no longer necessary now that we no
longer call atexit(4) directly on hppa.

Complete the prototype in a function cast to quiet a gcc warning

ok deraadt@

Correctly process RELOC_DIR32 while relocating ld.so itself; this allow
global data initializers to work as intended.
ok drahn kettenis@

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

ok miod@, deraadt@, jsing@

Improve support for shared libs linked at non-zero addreses:
- rename private values in struct elf_object to better
describe their meaning:
s/load_offs/obj_base/ "object's address '0' base"
s/load_addr/load_base/ "The base address of the loadable
segments"
- gdb needs the obj_base value so swap positions with load_base in
struct elf_object
- fix a few occurrences of where load_base was used instead of
obj_base.

With help and okay drahn@

Rework symbol lookup to more closely match sun's documentation, now
treats dlopens as load groups. ok kurt@

fixup the dlsym() return to produce a callable address (plabel) and move one comment closer to the code it talks about earlier; drahn@ ok

md parts for hppa

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@

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@

_dl_exit() is __dead, so it should return void.
Move _dl_mmap() and _dl_mquery() inlines from archdep.h to syscall.h and
remove pointless casts and unnecessary parens.

ok kettenis@

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@

fix types for mmap wrappers. A few whitespace cleanups snuck in.
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@

Only i386 needs mquery; delete the static inlines from amd64 and hppa

Remove some leftover bits that are no longer necessary now that we no
longer call atexit(4) directly on hppa.

Complete the prototype in a function cast to quiet a gcc warning

ok deraadt@

Correctly process RELOC_DIR32 while relocating ld.so itself; this allow
global data initializers to work as intended.
ok drahn kettenis@

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

ok miod@, deraadt@, jsing@

Improve support for shared libs linked at non-zero addreses:
- rename private values in struct elf_object to better
describe their meaning:
s/load_offs/obj_base/ "object's address '0' base"
s/load_addr/load_base/ "The base address of the loadable
segments"
- gdb needs the obj_base value so swap positions with load_base in
struct elf_object
- fix a few occurrences of where load_base was used instead of
obj_base.

With help and okay drahn@

Rework symbol lookup to more closely match sun's documentation, now
treats dlopens as load groups. ok kurt@

fixup the dlsym() return to produce a callable address (plabel) and move one comment closer to the code it talks about earlier; drahn@ ok

md parts for hppa

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@

_dl_exit() is __dead, so it should return void.
Move _dl_mmap() and _dl_mquery() inlines from archdep.h to syscall.h and
remove pointless casts and unnecessary parens.

ok kettenis@

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@

fix types for mmap wrappers. A few whitespace cleanups snuck in.
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@

Only i386 needs mquery; delete the static inlines from amd64 and hppa

Remove some leftover bits that are no longer necessary now that we no
longer call atexit(4) directly on hppa.

Complete the prototype in a function cast to quiet a gcc warning

ok deraadt@

Correctly process RELOC_DIR32 while relocating ld.so itself; this allow
global data initializers to work as intended.
ok drahn kettenis@

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

ok miod@, deraadt@, jsing@

Improve support for shared libs linked at non-zero addreses:
- rename private values in struct elf_object to better
describe their meaning:
s/load_offs/obj_base/ "object's address '0' base"
s/load_addr/load_base/ "The base address of the loadable
segments"
- gdb needs the obj_base value so swap positions with load_base in
struct elf_object
- fix a few occurrences of where load_base was used instead of
obj_base.

With help and okay drahn@

Rework symbol lookup to more closely match sun's documentation, now
treats dlopens as load groups. ok kurt@

fixup the dlsym() return to produce a callable address (plabel) and move one comment closer to the code it talks about earlier; drahn@ ok

md parts for hppa