From ee8e76141b4dd00f8e97fda274876a17f9a46bbe Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Mon, 11 Jul 2016 16:48:11 +0100 Subject: linux-user: Use correct target SHMLBA in shmat() The shmat() handling needs to do target-specific handling of the attach address for shmat(): * if the SHM_RND flag is passed, the address is rounded down to a SHMLBA boundary * if SHM_RND is not passed, then the call is failed EINVAL if the address is not a multiple of SHMLBA Since SHMLBA is target-specific, we need to do this checking and rounding in QEMU and can't leave it up to the host syscall. Allow targets to define TARGET_FORCE_SHMLBA and provide a target_shmlba() function if appropriate, and update do_shmat() to honour them. Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/mips/target_syscall.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'linux-user/mips/target_syscall.h') diff --git a/linux-user/mips/target_syscall.h b/linux-user/mips/target_syscall.h index 2b4f390729..6c666dcb73 100644 --- a/linux-user/mips/target_syscall.h +++ b/linux-user/mips/target_syscall.h @@ -230,4 +230,11 @@ struct target_pt_regs { #define TARGET_MLOCKALL_MCL_CURRENT 1 #define TARGET_MLOCKALL_MCL_FUTURE 2 +#define TARGET_FORCE_SHMLBA + +static inline abi_ulong target_shmlba(CPUMIPSState *env) +{ + return 0x40000; +} + #endif /* MIPS_TARGET_SYSCALL_H */ -- cgit v1.2.3