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bsd-user: Implement mincore(2)

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Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230925182709.4834-18-kariem.taha2.7@gmail.com>
This commit is contained in:
Stacey Son 2023-09-25 21:27:03 +03:00 • committed by Warner Losh
parent 0c1ced42c8
commit 83b045ad4e
2 changed files with 27 additions and 0 deletions
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23
bsd-user/bsd-mem.h
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@ -189,4 +189,27 @@ static inline abi_long do_bsd_minherit(abi_long addr, abi_long len,
return get_errno(minherit(g2h_untagged(addr), len, inherit));
}
/* mincore(2) */
static inline abi_long do_bsd_mincore(abi_ulong target_addr, abi_ulong len,
abi_ulong target_vec)
{
abi_long ret;
void *p;
abi_ulong vec_len = DIV_ROUND_UP(len, TARGET_PAGE_SIZE);
if (!guest_range_valid_untagged(target_addr, len)
|| !page_check_range(target_addr, len, PAGE_VALID)) {
return -TARGET_EFAULT;
}
p = lock_user(VERIFY_WRITE, target_vec, vec_len, 0);
if (p == NULL) {
return -TARGET_EFAULT;
}
ret = get_errno(mincore(g2h_untagged(target_addr), len, p));
unlock_user(p, target_vec, vec_len);
return ret;
}
#endif /* BSD_USER_BSD_MEM_H */