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Implement more security stuff

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- Support deterministic stacks on OpenBSD
- Support OpenBSD system call origin verification
- Fix overrun by one in chibicc string token allocator
- Get all chibicc tests passing under Address Sanitizer
This commit is contained in:
Justine Tunney 2021-02-02 20:21:06 -08:00
parent cbfd4ccd1e
commit c843243322
56 changed files with 376 additions and 245 deletions
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7
ape/ape.lds
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@ -282,6 +282,9 @@ SECTIONS {
KEEP(*(.textwindowsepilogue))
*(SORT_BY_ALIGNMENT(.text.modernity))
*(SORT_BY_ALIGNMENT(.text.modernity.*))
HIDDEN(__text_syscall_start = .);
*(.text.syscall .text.syscall.*)
HIDDEN(__text_syscall_end = .);
*(SORT_BY_ALIGNMENT(.text.hot))
*(SORT_BY_ALIGNMENT(.text.hot.*))
KEEP(*(.keep.text))
@ -483,6 +486,10 @@ SHSTUB2(.Lape.macho.dd.skip, RVA(ape.macho) / 8);
SHSTUB2(.Lape.macho.dd.count, (.Lape.macho.end - ape.macho) / 8);
PFSTUB4(.Lape.pe.offset, ape.pe - ape.mz);
HIDDEN(__text_syscall_addr = ROUNDDOWN(__text_syscall_start, PAGESIZE));
HIDDEN(__text_syscall_size = (ROUNDUP(__text_syscall_end, PAGESIZE) -
ROUNDDOWN(__text_syscall_start, PAGESIZE)));
HIDDEN(.Lape.pe.optsz = .Lape.pe.sections - (ape.pe + 24));
HIDDEN(.Lape.pe.shnum = (.Lape.pe.sections_end - .Lape.pe.sections) / 40);
HIDDEN(.Lidata.idtsize = idata.idtend - idata.idt);