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x86-64: enable smep and smap

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Matheus
2026-04-23 15:29:43 -03:00
parent b0542a165c
commit 71dd6d1125
9 changed files with 100 additions and 4 deletions
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kernel-src/arch/x86-64/mmu.c
+10
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@@ -324,7 +324,14 @@ static volatile struct limine_executable_address_request kaddrreq = {
#define ERROR_FETCH 16
static void pfisr(isr_t *self, context_t *ctx) {
if ((ctx->rflags & ARCH_CONTEXT_RFLAGS_AC) == 0 && IS_USER_ADDRESS((void *)ctx->cr2) && !IS_USER_ADDRESS((void *)ctx->rip)) {
_panic("SMAP/SMEP violation", ctx);
}
thread_t *thread = current_thread();
if (thread && thread->usercopyctx)
arch_cpu_user_access_end();
interrupt_set(true);
int vmmerror = 0;
@@ -338,6 +345,7 @@ static void pfisr(isr_t *self, context_t *ctx) {
if (vmm_pagefault((void *)ctx->cr2, ctx->cs != 8, vmmerror) == false) {
if (thread && thread->usercopyctx) {
memcpy(ctx, thread->usercopyctx, sizeof(context_t));
ctx->rflags &= ~ARCH_CONTEXT_RFLAGS_AC;
thread->usercopyctx = NULL;
CTX_RET(ctx) = EFAULT;
} else if (ARCH_CONTEXT_ISUSER(ctx)) {
@@ -361,7 +369,9 @@ static void gpfisr(isr_t *self, context_t *ctx) {
thread_t *thread = current_thread();
if (thread && thread->usercopyctx) {
arch_cpu_user_access_end();
memcpy(ctx, thread->usercopyctx, sizeof(context_t));
ctx->rflags &= ~ARCH_CONTEXT_RFLAGS_AC;
thread->usercopyctx = NULL;
CTX_RET(ctx) = EFAULT;
} else if (ARCH_CONTEXT_ISUSER(ctx)) {