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[Qemu-devel] [PATCH 19/26] target/arm: Implement pauth_strip
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 19/26] target/arm: Implement pauth_strip |
Date: |
Fri, 7 Dec 2018 04:36:24 -0600 |
Stripping out the authentication data does not require any crypto,
it merely requires the virtual address parameters.
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/helper-a64.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 0818fd5451..8860704720 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -1069,15 +1069,27 @@ 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,
uint64_t *key, bool data, int keynumber)
{
g_assert_not_reached(); /* FIXME */
}
-static uint64_t pauth_strip(CPUARMState *env, uint64_t a, bool data)
+static uint64_t pauth_strip(CPUARMState *env, uint64_t ptr, bool data)
{
- g_assert_not_reached(); /* FIXME */
+ ARMMMUIdx mmu_idx = arm_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,
--
2.17.2
- [Qemu-devel] [PATCH 13/26] target/arm: Decode Load/store register (pac), (continued)
- [Qemu-devel] [PATCH 13/26] target/arm: Decode Load/store register (pac), Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 12/26] target/arm: Decode PAuth within disas_uncond_b_reg, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 14/26] target/arm: Move cpu_mmu_index out of line, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 17/26] target/arm: Reuse aa64_va_parameters for setting tbflags, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 18/26] target/arm: Export aa64_va_parameters to internals.h, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 19/26] target/arm: Implement pauth_strip,
Richard Henderson <=
- [Qemu-devel] [PATCH 20/26] target/arm: Implement pauth_auth, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 16/26] target/arm: Create ARMVAParameters and helpers, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 21/26] target/arm: Implement pauth_addpac, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 22/26] target/arm: Implement pauth_computepac, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 23/26] target/arm: Add PAuth system registers, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 24/26] target/arm: Enable PAuth for user-only -cpu max, Richard Henderson, 2018/12/07
- [Qemu-devel] [PATCH 25/26] target/arm: Enable PAuth for user-only, part 2, Richard Henderson, 2018/12/07