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linux-user: Use guest_range_valid in access_ok

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We're currently open-coding the range check in access_ok;
use guest_range_valid when size != 0.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2021-02-12 10:48:45 -08:00 committed by Peter Maydell
parent ee1bf83de7
commit 114556c533
1 changed files with 3 additions and 6 deletions
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9
linux-user/qemu.h
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@ -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;