On Thu, Aug 29, 2024 at 10:56:41PM -0700, Deepak Gupta wrote:
On Fri, Aug 30, 2024 at 03:20:04PM +1000, Richard Henderson wrote:
On 8/30/24 09:34, Deepak Gupta wrote:
+bool cpu_get_bcfien(CPURISCVState *env)
It occurs to me that a better name would be "cpu_get_sspen".
The backward cfi is mere
On Fri, Aug 30, 2024 at 03:20:04PM +1000, Richard Henderson wrote:
On 8/30/24 09:34, Deepak Gupta wrote:
+bool cpu_get_bcfien(CPURISCVState *env)
It occurs to me that a better name would be "cpu_get_sspen".
The backward cfi is merely a consequence of the shadow stack.
Want me to change cpu_g
On 8/30/24 09:34, Deepak Gupta wrote:
+bool cpu_get_bcfien(CPURISCVState *env)
It occurs to me that a better name would be "cpu_get_sspen".
The backward cfi is merely a consequence of the shadow stack.
+{
+/* no cfi extension, return false */
+if (!env_archcpu(env)->cfg.ext_zicfiss) {
zicfiss introduces a new state ssp ("shadow stack register") in cpu.
ssp is expressed as a new unprivileged csr (CSR_SSP=0x11) and holds
virtual address for shadow stack as programmed by software.
Shadow stack (for each mode) is enabled via bit3 in *envcfg CSRs.
Shadow stack can be enabled for a m
