summaryrefslogtreecommitdiff
path: root/sys/kern
diff options
context:
space:
mode:
Diffstat (limited to 'sys/kern')
-rw-r--r--sys/kern/kern_sched.c114
1 files changed, 57 insertions, 57 deletions
diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c
index c362b98..669d255 100644
--- a/sys/kern/kern_sched.c
+++ b/sys/kern/kern_sched.c
@@ -139,63 +139,6 @@ sched_enter(void)
}
static uintptr_t
-sched_init_stack(void *stack_top, struct exec_args args)
-{
- uintptr_t *sp = stack_top;
- uintptr_t old_sp = 0;
- size_t argc, envc, len;
- char **argvp = args.argp;
- char **envp = args.envp;
- struct auxval auxv = args.auxv;
-
- /* Copy strings */
- old_sp = (uintptr_t)sp;
- for (argc = 0; argvp[argc] != NULL; ++argc) {
- len = strlen(argvp[argc]) + 1;
- sp = (void *)((char *)sp - len);
- memcpy((char *)sp, argvp[argc], len);
- }
- for (envc = 0; envp[envc] != NULL; ++envc) {
- len = strlen(envp[envc]) + 1;
- sp = (void *)((char *)sp - len);
- memcpy((char *)sp, envp[envc], len);
- }
-
- /* Ensure the stack is aligned */
- sp = (void *)__ALIGN_DOWN((uintptr_t)sp, 16);
- if (((argc + envc + 1) & 1) != 0)
- --sp;
-
- AUXVAL(sp, AT_NULL, 0x0);
- AUXVAL(sp, AT_SECURE, 0x0);
- AUXVAL(sp, AT_ENTRY, auxv.at_entry);
- AUXVAL(sp, AT_PHDR, auxv.at_phdr);
- AUXVAL(sp, AT_PHNUM, auxv.at_phnum);
- AUXVAL(sp, AT_PAGESIZE, vm_get_page_size());
- STACK_PUSH(sp, 0);
-
- /* Copy envp pointers */
- sp -= envc;
- for (int i = 0; i < envc; ++i) {
- len = strlen(envp[i]) + 1;
- old_sp -= len;
- sp[i] = KERN_TO_USER(old_sp);
- }
-
- /* Copy argvp pointers */
- STACK_PUSH(sp, 0);
- sp -= argc;
- for (int i = 0; i < argc; ++i) {
- len = strlen(argvp[i]) + 1;
- old_sp -= len;
- sp[i] = KERN_TO_USER(old_sp);
- }
-
- STACK_PUSH(sp, argc);
- return (uintptr_t)sp;
-}
-
-static uintptr_t
sched_create_stack(struct vas vas, bool user, struct exec_args args,
struct proc *td)
{
@@ -345,6 +288,63 @@ sched_make_idletd(void)
sched_enqueue_td(td);
}
+uintptr_t
+sched_init_stack(void *stack_top, struct exec_args args)
+{
+ uintptr_t *sp = stack_top;
+ uintptr_t old_sp = 0;
+ size_t argc, envc, len;
+ char **argvp = args.argp;
+ char **envp = args.envp;
+ struct auxval auxv = args.auxv;
+
+ /* Copy strings */
+ old_sp = (uintptr_t)sp;
+ for (argc = 0; argvp[argc] != NULL; ++argc) {
+ len = strlen(argvp[argc]) + 1;
+ sp = (void *)((char *)sp - len);
+ memcpy((char *)sp, argvp[argc], len);
+ }
+ for (envc = 0; envp[envc] != NULL; ++envc) {
+ len = strlen(envp[envc]) + 1;
+ sp = (void *)((char *)sp - len);
+ memcpy((char *)sp, envp[envc], len);
+ }
+
+ /* Ensure the stack is aligned */
+ sp = (void *)__ALIGN_DOWN((uintptr_t)sp, 16);
+ if (((argc + envc + 1) & 1) != 0)
+ --sp;
+
+ AUXVAL(sp, AT_NULL, 0x0);
+ AUXVAL(sp, AT_SECURE, 0x0);
+ AUXVAL(sp, AT_ENTRY, auxv.at_entry);
+ AUXVAL(sp, AT_PHDR, auxv.at_phdr);
+ AUXVAL(sp, AT_PHNUM, auxv.at_phnum);
+ AUXVAL(sp, AT_PAGESIZE, vm_get_page_size());
+ STACK_PUSH(sp, 0);
+
+ /* Copy envp pointers */
+ sp -= envc;
+ for (int i = 0; i < envc; ++i) {
+ len = strlen(envp[i]) + 1;
+ old_sp -= len;
+ sp[i] = KERN_TO_USER(old_sp);
+ }
+
+ /* Copy argvp pointers */
+ STACK_PUSH(sp, 0);
+ sp -= argc;
+ for (int i = 0; i < argc; ++i) {
+ len = strlen(argvp[i]) + 1;
+ old_sp -= len;
+ sp[i] = KERN_TO_USER(old_sp);
+ }
+
+ STACK_PUSH(sp, argc);
+ return (uintptr_t)sp;
+}
+
/*
* Cause an early preemption and lets
* the next thread run.