From 18e80c55bb6ec17c05ec0ba717ec83933c2bfc07 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Thu, 5 Oct 2017 10:36:00 -0400 Subject: linux-user: Tidy and enforce reserved_va initialization We had a check using TARGET_VIRT_ADDR_SPACE_BITS to make sure that the allocation coming in from the command-line option was not too large, but that didn't include target-specific knowledge about other restrictions on user-space. Remove several target-specific hacks in linux-user/main.c. For MIPS and Nios, we can replace them with proper adjustments to the respective target's TARGET_VIRT_ADDR_SPACE_BITS definition. For ARM, we had no existing ifdef but I suspect that the current default value of 0xf7000000 was chosen with this in mind. Define a workable value in linux-user/arm/, and also document why the special case is required. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell Message-Id: <20170708025030.15845-3-rth@twiddle.net> Signed-off-by: Riku Voipio --- linux-user/arm/target_cpu.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'linux-user/arm') diff --git a/linux-user/arm/target_cpu.h b/linux-user/arm/target_cpu.h index d888219150..c3eb4b243d 100644 --- a/linux-user/arm/target_cpu.h +++ b/linux-user/arm/target_cpu.h @@ -19,6 +19,10 @@ #ifndef ARM_TARGET_CPU_H #define ARM_TARGET_CPU_H +/* We need to be able to map the commpage. + See validate_guest_space in linux-user/elfload.c. */ +#define MAX_RESERVED_VA 0xffff0000ul + static inline void cpu_clone_regs(CPUARMState *env, target_ulong newsp) { if (newsp) { -- cgit v1.2.3-55-g7522