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linux-user: Support target-to-host translation of mlockall argument

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The argument to the mlockall system call is not necessarily the same on
all platforms and thus may require translation prior to passing to the
host.

For example, PowerPC 64 bit platforms define values for MCL_CURRENT
(0x2000) and MCL_FUTURE (0x4000) which are different from Intel platforms
(0x1 and 0x2, respectively)

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Tom Musta 2014-08-12 13:53:42 -05:00 • committed by Riku Voipio
parent 8fbe8fdfbc
commit 6f6a40328b
18 changed files with 50 additions and 1 deletions
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17
linux-user/syscall.c
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@ -4968,6 +4968,21 @@ static inline abi_long target_to_host_sigevent(struct sigevent *host_sevp,
return 0;
}
#if defined(TARGET_NR_mlockall)
static inline int target_to_host_mlockall_arg(int arg)
{
int result = 0;
if (arg & TARGET_MLOCKALL_MCL_CURRENT) {
result |= MCL_CURRENT;
}
if (arg & TARGET_MLOCKALL_MCL_FUTURE) {
result |= MCL_FUTURE;
}
return result;
}
#endif
#if defined(TARGET_NR_stat64) || defined(TARGET_NR_newfstatat)
static inline abi_long host_to_target_stat64(void *cpu_env,
abi_ulong target_addr,
@ -6820,7 +6835,7 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
#endif
#ifdef TARGET_NR_mlockall
case TARGET_NR_mlockall:
ret = get_errno(mlockall(arg1));
ret = get_errno(mlockall(target_to_host_mlockall_arg(arg1)));
break;
#endif
#ifdef TARGET_NR_munlockall