From 0ff0508286106c2b71cdc8e83e5ad93003b91be4 Mon Sep 17 00:00:00 2001 From: Warner Losh Date: Mon, 31 Jan 2022 16:06:46 -0700 Subject: bsd-user: Define target_arg64 target_arg64 is a generic way to extract 64-bits from a pair of arguments. On 32-bit platforms, it returns them joined together as appropriate. On 64-bit platforms, it returns the first arg because it's already 64-bits. Signed-off-by: Stacey Son Signed-off-by: Warner Losh Reviewed-by: Kyle Evans Reviewed-by: Richard Henderson --- bsd-user/qemu.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'bsd-user') diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index a9efa807b7..af272c2a80 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -462,6 +462,19 @@ static inline void *lock_user_string(abi_ulong guest_addr) #define unlock_user_struct(host_ptr, guest_addr, copy) \ unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0) +static inline uint64_t target_arg64(uint32_t word0, uint32_t word1) +{ +#if TARGET_ABI_BITS == 32 +#ifdef TARGET_WORDS_BIGENDIAN + return ((uint64_t)word0 << 32) | word1; +#else + return ((uint64_t)word1 << 32) | word0; +#endif +#else /* TARGET_ABI_BITS != 32 */ + return word0; +#endif /* TARGET_ABI_BITS != 32 */ +} + #include #include "user/safe-syscall.h" -- cgit v1.2.3-55-g7522