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Implement lock IRQ nesting via stack variables/contexts
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This commit is contained in:
Kamil Kowalczyk
2026-01-14 22:11:56 +01:00
parent 55166f9d5f
commit 270ff507d4
22 changed files with 197 additions and 145 deletions
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22
kernel/syscall/syscall.c
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@@ -60,21 +60,22 @@ DEFINE_SYSCALL (sys_proc_unmap) {
/* int proc_create_resource_mem (size_t pages, int vis, uintptr_t* out_paddr) */
DEFINE_SYSCALL (sys_proc_create_resource_mem) {
struct limine_hhdm_response* hhdm = limine_hhdm_request.response;
spin_lock_ctx_t ctxprpd;
size_t pages = (size_t)a1;
int vis = (int)a2;
uintptr_t* out_paddr_buf = (uintptr_t*)a3;
spin_lock (&proc->pd.lock);
spin_lock (&proc->pd.lock, &ctxprpd);
uintptr_t out_paddr_buf_paddr = mm_v2p (&proc->pd, (uintptr_t)out_paddr_buf, 0);
if (!mm_validate_buffer (&proc->pd, (uintptr_t)out_paddr_buf, sizeof (uintptr_t), 0)) {
spin_unlock (&proc->pd.lock);
spin_unlock (&proc->pd.lock, &ctxprpd);
return -SR_BAD_ADDRESS_SPACE;
}
spin_unlock (&proc->pd.lock);
spin_unlock (&proc->pd.lock, &ctxprpd);
uintptr_t* out_paddr_buf_vaddr = (uintptr_t*)((uintptr_t)hhdm->offset + out_paddr_buf_paddr);
@@ -104,13 +105,14 @@ DEFINE_SYSCALL (sys_proc_create_resource_mutex) {
/* int proc_mutex_lock (int mutex_rid) */
DEFINE_SYSCALL (sys_proc_mutex_lock) {
spin_lock_ctx_t ctxpr;
int rid = (int)a1;
struct proc_resource* resource;
spin_lock (&proc->lock);
spin_lock (&proc->lock, &ctxpr);
rbtree_find (struct proc_resource, &proc->resource_tree, rid, resource, proc_resource_tree_link,
rid);
spin_unlock (&proc->lock);
spin_unlock (&proc->lock, &ctxpr);
if (resource == NULL)
return -SR_NOT_FOUND;
@@ -121,13 +123,14 @@ DEFINE_SYSCALL (sys_proc_mutex_lock) {
}
DEFINE_SYSCALL (sys_proc_mutex_unlock) {
spin_lock_ctx_t ctxpr;
int rid = (int)a1;
struct proc_resource* resource;
spin_lock (&proc->lock);
spin_lock (&proc->lock, &ctxpr);
rbtree_find (struct proc_resource, &proc->resource_tree, rid, resource, proc_resource_tree_link,
rid);
spin_unlock (&proc->lock);
spin_unlock (&proc->lock, &ctxpr);
if (resource == NULL)
return -SR_NOT_FOUND;
@@ -137,13 +140,14 @@ DEFINE_SYSCALL (sys_proc_mutex_unlock) {
/* int proc_drop_resource (int rid) */
DEFINE_SYSCALL (sys_proc_drop_resource) {
spin_lock_ctx_t ctxpr;
int rid = (int)a1;
struct proc_resource* resource;
spin_lock (&proc->lock);
spin_lock (&proc->lock, &ctxpr);
rbtree_find (struct proc_resource, &proc->resource_tree, rid, resource, proc_resource_tree_link,
rid);
spin_unlock (&proc->lock);
spin_unlock (&proc->lock, &ctxpr);
if (resource == NULL)
return -SR_NOT_FOUND;