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kboot: Pull in constants from Linux's mmap.h api

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Define the usual #defines for mmap(2) (with HOST_ prepended) and use
them instead of hard coding constants.

Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2022-06-28 10:43:42 -06:00
parent 2870493f1f
commit 01c58e7e4f
1 changed files with 17 additions and 2 deletions
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19
stand/kboot/host_syscall.h
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@ -86,7 +86,20 @@ struct host_timeval {
long tv_usec;
};
#define HOST_AT_FDCWD -100 /* Relative to current directory */
/*
* Must match Linux's values see linux/tools/include/uapi/asm-generic/mman-common.h
* and linux/tools/include/linux/mman.h
*
* And pre-pend HOST_ here.
*/
#define HOST_PROT_READ 0x1
#define HOST_PROT_WRITE 0x2
#define HOST_PROT_EXEC 0x4
#define HOST_MAP_SHARED 0x01
#define HOST_MAP_PRIVATE 0x02
#define HOST_MAP_FIXED 0x10
#define HOST_MAP_ANONYMOUS 0x20
/* Mount flags from uapi */
#define MS_RELATIME (1 << 21)
@ -147,6 +160,8 @@ ssize_t host_write(int fd, const void *buf, size_t nbyte);
/*
* Wrappers / one-liners
*/
#define host_getmem(size) host_mmap(0, size, 3 /* RW */, 0x22 /* ANON */, -1, 0);
#define host_getmem(size) \
host_mmap(0, size, HOST_PROT_READ | HOST_PROT_WRITE, \
HOST_MAP_PRIVATE | HOST_MAP_ANONYMOUS, -1, 0);
#endif