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[PATCH v2 04/17] linux-user: Tidy VERIFY_READ/VERIFY_WRITE
From: |
Richard Henderson |
Subject: |
[PATCH v2 04/17] linux-user: Tidy VERIFY_READ/VERIFY_WRITE |
Date: |
Thu, 4 Jun 2020 21:17:20 -0700 |
These constants are only ever used with access_ok, and friends.
Rather than translating them to PAGE_* bits, let them equal
the PAGE_* bits to begin.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/qemu.h | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 2bf35e66ac..a8dde8c609 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -464,8 +464,8 @@ extern unsigned long guest_stack_size;
/* user access */
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1 /* implies read access */
+#define VERIFY_READ PAGE_READ
+#define VERIFY_WRITE (PAGE_READ | PAGE_WRITE)
static inline bool access_ok(int type, abi_ulong addr, abi_ulong size)
{
@@ -477,9 +477,7 @@ static inline bool access_ok(int type, abi_ulong addr,
abi_ulong size)
!guest_addr_valid(addr + size - 1))) {
return false;
}
- return page_check_range((target_ulong)addr, size,
- (type == VERIFY_READ) ? PAGE_READ :
- (PAGE_READ | PAGE_WRITE)) == 0;
+ return page_check_range((target_ulong)addr, size, type) == 0;
}
/* NOTE __get_user and __put_user use host pointers and don't check access.
--
2.25.1
- [PATCH v2 00/17] target-arm: Implement ARMv8.5-MemTag, user mode, Richard Henderson, 2020/06/05
- [PATCH v2 01/17] tcg: Introduce target-specific page data for user-only, Richard Henderson, 2020/06/05
- [PATCH v2 03/17] linux-user: Check for overflow in access_ok, Richard Henderson, 2020/06/05
- [PATCH v2 02/17] linux-user: Introduce PAGE_ANON, Richard Henderson, 2020/06/05
- [PATCH v2 04/17] linux-user: Tidy VERIFY_READ/VERIFY_WRITE,
Richard Henderson <=
- [PATCH v2 05/17] bsd-user: Tidy VERIFY_READ/VERIFY_WRITE, Richard Henderson, 2020/06/05
- [PATCH v2 06/17] linux-user: Do not use guest_addr_valid for h2g_valid, Richard Henderson, 2020/06/05
- [PATCH v2 07/17] linux-user: Fix guest_addr_valid vs reserved_va, Richard Henderson, 2020/06/05
- [PATCH v2 08/17] exec: Add support for TARGET_TAGGED_ADDRESSES, Richard Henderson, 2020/06/05
- [PATCH v2 09/17] linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE, Richard Henderson, 2020/06/05