openbsd-src/libexec/ld.so/hppa/ at jcs · jcs.org/openbsd-src

jcs.org / openbsd-src

jcs's openbsd hax

openbsd

openbsd-src / libexec / ld.so / hppa /

at jcs 7 files

Rewrite the hppa assembly code to avoid reads from .text, by using the standard PIC magic. This makes the code similar to what we already use for rcrt0.o. This makes it ready for execute-only.

3 years ago

Make sure the syscall table entries are aligned on a 4-byte boundary. Required for strict-alignment architectures and a good idea on others. same as kettenis commit to libc

2 years ago

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

2 years ago

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.

4 years ago

For strange reasons which made sense at the time, the text segment was placed head of the btext (boot.text) segment. (the boot.text segment is "unmapped" after initization, as a self-protection mechanism). this meant the LOAD's virtual addresses were not in sequence, which clearly isn't what we intended.

2 years ago

Rewrite the hppa assembly code to avoid reads from .text, by using the standard PIC magic. This makes the code similar to what we already use for rcrt0.o. This makes it ready for execute-only.

3 years ago

use ansi volatile keyword, not __volatile__ ok miod@ guenther@

3 years ago