yuzu/unicorn
1
0
Fork 0
mirror of https://github.com/yuzu-emu/unicorn.git synced 2025-03-23 05:25:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

target/arm: Implement pauth_strip

Browse source 
Stripping out the authentication data does not require any crypto,
it merely requires the virtual address parameters.

Backports commit 04d13549fa10bb9775a90701e4e6fd0a2cbf83cb from qemu
This commit is contained in:
Richard Henderson 2019-01-22 16:31:09 -05:00 committed by Lioncash
parent 048d8da45c
commit 2545f8cf84
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 13 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
qemu/target/arm/pauth_helper.c
View file

@ -38,6 +38,15 @@ static uint64_t pauth_addpac(CPUARMState *env, uint64_t ptr, uint64_t modifier,
g_assert_not_reached(); /* FIXME */
}
static uint64_t pauth_original_ptr(uint64_t ptr, ARMVAParameters param)
{
uint64_t extfield = -param.select;
int bot_pac_bit = 64 - param.tsz;
int top_pac_bit = 64 - 8 * param.tbi;
return deposit64(ptr, bot_pac_bit, top_pac_bit - bot_pac_bit, extfield);
}
static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier,
ARMPACKey *key, bool data, int keynumber)
{
@ -46,7 +55,10 @@ static uint64_t pauth_auth(CPUARMState *env, uint64_t ptr, uint64_t modifier,
static uint64_t pauth_strip(CPUARMState *env, uint64_t ptr, bool data)
{
g_assert_not_reached(); /* FIXME */
ARMMMUIdx mmu_idx = arm_stage1_mmu_idx(env);
ARMVAParameters param = aa64_va_parameters(env, ptr, mmu_idx, data);
return pauth_original_ptr(ptr, param);
}
static void QEMU_NORETURN pauth_trap(CPUARMState *env, int target_el,