diff options
| author | Warner Losh <imp@bsdimp.com> | 2022-01-31 16:06:46 -0700 |
|---|---|---|
| committer | Warner Losh <imp@bsdimp.com> | 2022-02-26 21:05:21 -0700 |
| commit | 0ff0508286106c2b71cdc8e83e5ad93003b91be4 (patch) | |
| tree | b74f435e634a355ca31e41be8aba66eeba655576 /bsd-user | |
| parent | 647afdf1836548146b77c6ca68e93c7acfe35738 (diff) | |
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 <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'bsd-user')
| -rw-r--r-- | bsd-user/qemu.h | 13 |
1 files changed, 13 insertions, 0 deletions
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 <pthread.h> #include "user/safe-syscall.h" |