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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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2
libc/sysv/consts/MAP_CONCEAL.s Normal file
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@ -0,0 +1,2 @@
.include "libc/sysv/consts/syscon.inc"
.syscon mmap MAP_CONCEAL 0 0 0x20000 0x8000 0

2
libc/sysv/consts/MAP_GROWSDOWN.s
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@ -1,2 +1,2 @@
.include "libc/sysv/consts/syscon.inc"
.syscon mmap MAP_GROWSDOWN 0x0100 0 0x0400 0x0400 0x100000
.syscon mmap MAP_GROWSDOWN 0x0100 0 0x0400 0x4000 0x100000

2
libc/sysv/consts/MAP_NOCORE.s Normal file
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@ -0,0 +1,2 @@
.include "libc/sysv/consts/syscon.inc"
.syscon compat MAP_NOCORE 0 0 0x20000 0x8000 0

2
libc/sysv/consts/__NR_msyscall.s Normal file
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@ -0,0 +1,2 @@
.include "libc/sysv/consts/syscon.inc"
.syscon nr __NR_msyscall -1 -1 -1 0x0025 -1

7
libc/sysv/consts/map.h
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@ -21,7 +21,6 @@ hidden extern const long MAP_NORESERVE;
hidden extern const long MAP_POPULATE;
hidden extern const long MAP_PRIVATE;
hidden extern const long MAP_SHARED;
hidden extern const long MAP_STACK;
hidden extern const long MAP_TYPE;
COSMOPOLITAN_C_END_
@ -34,6 +33,7 @@ COSMOPOLITAN_C_END_
#define MAP_32BIT SYMBOLIC(MAP_32BIT)
#define MAP_ANONYMOUS SYMBOLIC(MAP_ANONYMOUS)
#define MAP_CONCEAL SYMBOLIC(MAP_CONCEAL)
#define MAP_DENYWRITE SYMBOLIC(MAP_DENYWRITE)
#define MAP_EXECUTABLE SYMBOLIC(MAP_EXECUTABLE)
#define MAP_GROWSDOWN SYMBOLIC(MAP_GROWSDOWN)
@ -46,7 +46,8 @@ COSMOPOLITAN_C_END_
#define MAP_POPULATE SYMBOLIC(MAP_POPULATE)
#define MAP_TYPE SYMBOLIC(MAP_TYPE)
#define MAP_ANON MAP_ANONYMOUS
#define MAP_STACK MAP_GROWSDOWN
#define MAP_ANON MAP_ANONYMOUS
#define MAP_NOCORE MAP_CONCEAL
#define MAP_STACK MAP_GROWSDOWN
#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_MAP_H_ */

2
libc/sysv/consts/nr.h
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@ -332,6 +332,7 @@
#define __NR_io_uring_enter SYMBOLIC(__NR_io_uring_enter)
#define __NR_io_uring_register SYMBOLIC(__NR_io_uring_register)
#define __NR_pledge SYMBOLIC(__NR_pledge)
#define __NR_msyscall SYMBOLIC(__NR_msyscall)
#define __NR_ktrace SYMBOLIC(__NR_ktrace)
#define __NR_kqueue SYMBOLIC(__NR_kqueue)
#define __NR_kevent SYMBOLIC(__NR_kevent)
@ -1105,6 +1106,7 @@ hidden extern const long __NR_io_uring_setup;
hidden extern const long __NR_io_uring_enter;
hidden extern const long __NR_io_uring_register;
hidden extern const long __NR_pledge;
hidden extern const long __NR_msyscall;
hidden extern const long __NR_ktrace;
hidden extern const long __NR_kqueue;
hidden extern const long __NR_kevent;