On Wed, Aug 07, 2024 at 12:56:46PM +1000, Richard Henderson wrote:
On 8/7/24 12:39, Richard Henderson wrote:
+static bool trans_sspopchk(DisasContext *ctx, arg_sspopchk *a)
+{
+ /* default for qemu-user, use regular RW memory and thus mmu_idx=0 */
+ int ss_mmu_idx = 0;
This can't be righ
On Wed, Aug 07, 2024 at 12:39:15PM +1000, Richard Henderson wrote:
On 8/7/24 10:06, Deepak Gupta wrote:
zicfiss has following instructions
- sspopchk: pops a value from shadow stack and compares with x1/x5.
If they dont match, reports a sw check exception with tval = 3.
- sspush: pushes val
On 8/7/24 12:39, Richard Henderson wrote:
+static bool trans_sspopchk(DisasContext *ctx, arg_sspopchk *a)
+{
+ /* default for qemu-user, use regular RW memory and thus mmu_idx=0 */
+ int ss_mmu_idx = 0;
This can't be right, since 0 is M_MODE.
I'm wrong about m-mode here, but "0" is cert
On 8/7/24 10:06, Deepak Gupta wrote:
zicfiss has following instructions
- sspopchk: pops a value from shadow stack and compares with x1/x5.
If they dont match, reports a sw check exception with tval = 3.
- sspush: pushes value in x1/x5 on shadow stack
- ssrdp: reads current shadow stack
zicfiss has following instructions
- sspopchk: pops a value from shadow stack and compares with x1/x5.
If they dont match, reports a sw check exception with tval = 3.
- sspush: pushes value in x1/x5 on shadow stack
- ssrdp: reads current shadow stack
- ssamoswap: swaps contents of shadow sta
