motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 09:43:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target/arm: Implement FEAT_FPAC and FEAT_FPACCOMBINE

Browse source 
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230829232335.965414-10-richard.henderson@linaro.org
Message-Id: <20230609172324.982888-8-aaron@os.amperecomputing.com>
[rth: Simplify fpac comparison, reusing cmp_mask]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Aaron Lindsay 2023-08-29 16:23:32 -07:00 • committed by Peter Maydell
parent 28b9dcb74b
commit 8a69a42340
4 changed files with 27 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

18
target/arm/tcg/pauth_helper.c
View file

@ -396,6 +396,14 @@ static uint64_t pauth_original_ptr(uint64_t ptr, ARMVAParameters param)
}
}
static G_NORETURN
void pauth_fail_exception(CPUARMState *env, bool data,
int keynumber, uintptr_t ra)
{
raise_exception_ra(env, EXCP_UDEF, syn_pacfail(data, keynumber),
exception_target_el(env), ra);
}
static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier,
ARMPACKey *key, bool data, int keynumber,
uintptr_t ra, bool is_combined)
@ -416,7 +424,15 @@ static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier,
cmp_mask &= ~MAKE_64BIT_MASK(55, 1);
if (pauth_feature >= PauthFeat_2) {
return ptr ^ (pac & cmp_mask);
ARMPauthFeature fault_feature =
is_combined ? PauthFeat_FPACCOMBINED : PauthFeat_FPAC;
uint64_t result = ptr ^ (pac & cmp_mask);
if (pauth_feature >= fault_feature
&& ((result ^ sextract64(result, 55, 1)) & cmp_mask)) {
pauth_fail_exception(env, data, keynumber, ra);
}
return result;
}
if ((pac ^ ptr) & cmp_mask) {