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[PATCH v5 14/31] linux-user: Use guest_range_valid in access_ok
From: |
Richard Henderson |
Subject: |
[PATCH v5 14/31] linux-user: Use guest_range_valid in access_ok |
Date: |
Wed, 3 Feb 2021 08:59:53 -1000 |
We're currently open-coding the range check in access_ok;
use guest_range_valid when size != 0.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/qemu.h | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 9fbc5edc4b..ba122a7903 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -493,12 +493,9 @@ extern unsigned long guest_stack_size;
static inline bool access_ok(int type, abi_ulong addr, abi_ulong size)
{
- if (!guest_addr_valid(addr)) {
- return false;
- }
- if (size != 0 &&
- (addr + size - 1 < addr ||
- !guest_addr_valid(addr + size - 1))) {
+ if (size == 0
+ ? !guest_addr_valid(addr)
+ : !guest_range_valid(addr, size)) {
return false;
}
return page_check_range((target_ulong)addr, size, type) == 0;
--
2.25.1
- [PATCH v5 12/31] exec: Use cpu_untagged_addr in g2h; split out g2h_untagged, (continued)
- [PATCH v5 12/31] exec: Use cpu_untagged_addr in g2h; split out g2h_untagged, Richard Henderson, 2021/02/03
- [PATCH v5 11/31] exec: Introduce cpu_untagged_addr, Richard Henderson, 2021/02/03
- [PATCH v5 19/31] linux-user: Handle tags in lock_user/unlock_user, Richard Henderson, 2021/02/03
- [PATCH v5 23/31] linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG, Richard Henderson, 2021/02/03
- [PATCH v5 04/31] exec: Use uintptr_t in cpu_ldst.h, Richard Henderson, 2021/02/03
- [PATCH v5 09/31] linux-user: Do not use guest_addr_valid for h2g_valid, Richard Henderson, 2021/02/03
- [PATCH v5 14/31] linux-user: Use guest_range_valid in access_ok,
Richard Henderson <=
- [PATCH v5 16/31] linux-user: Use cpu_untagged_addr in access_ok; split out *_untagged, Richard Henderson, 2021/02/03
- [PATCH v5 15/31] exec: Rename guest_{addr,range}_valid to *_untagged, Richard Henderson, 2021/02/03
- [PATCH v5 18/31] linux-user: Fix types in uaccess.c, Richard Henderson, 2021/02/03
- [PATCH v5 17/31] linux-user: Move lock_user et al out of line, Richard Henderson, 2021/02/03
- [PATCH v5 20/31] linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE, Richard Henderson, 2021/02/03