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-rw-r--r--Makefile.in12
-rw-r--r--sys/include/arch/amd64/frame.h7
-rw-r--r--sys/include/sys/proc.h2
-rw-r--r--sys/kern/kern_sched.c153
-rwxr-xr-xusr.sbin/init/initbin944 -> 0 bytes
5 files changed, 157 insertions, 17 deletions
diff --git a/Makefile.in b/Makefile.in
index daa0cf9..5e99728 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -69,16 +69,22 @@ override KERNEL_ASMOBJECTS = $(KERNEL_ASMFILES:.S=.S.o)
override KERNEL_HEADER_DEPS = $(KERNEL_CFILES:.c=.d)
.PHONY: all
-all: base init lib base/usr/lib/ld.so base/boot/hyra-kernel
+all: base lib userland base/usr/lib/ld.so base/boot/hyra-kernel
rm -f sys/include/machine
rm -rf iso_root
-base/boot/init: usr.sbin/init/
+base/usr/sbin/init:
cd usr.sbin/; make CC=$(CC) LD=$(LD)
- cp usr.sbin/init/init base/boot/
+ mv usr.sbin/init/init base/usr/sbin/
+
+# TODO: Make this more flexible
+.PHONY: userland
+userland: base/usr/sbin/init
base:
mkdir -p base/usr/lib/
+ mkdir -p base/usr/sbin/
+ mkdir -p base/boot/
lib: lib/mlibc base/usr/lib/ld.so
diff --git a/sys/include/arch/amd64/frame.h b/sys/include/arch/amd64/frame.h
index a2e1a05..298a836 100644
--- a/sys/include/arch/amd64/frame.h
+++ b/sys/include/arch/amd64/frame.h
@@ -67,5 +67,12 @@ struct trapframe {
(FRAME)->rsp = SP; \
(FRAME)->ss = 0x10; \
+#define init_frame_user(FRAME, IP, SP) \
+ (FRAME)->rip = IP; \
+ (FRAME)->cs = 0x18 | 3; \
+ (FRAME)->rflags = 0x202; \
+ (FRAME)->rsp = SP; \
+ (FRAME)->ss = 0x20 | 3; \
+
#endif /* !defined(__ASSEMBLER__) */
#endif /* !_AMD64_FRAME_H_ */
diff --git a/sys/include/sys/proc.h b/sys/include/sys/proc.h
index f45e4c6..0d3b45e 100644
--- a/sys/include/sys/proc.h
+++ b/sys/include/sys/proc.h
@@ -34,6 +34,7 @@
#include <sys/queue.h>
#include <machine/cpu.h>
#include <machine/frame.h>
+#include <vm/vm.h>
/*
* A task running on the CPU e.g., a process or
@@ -43,6 +44,7 @@ struct proc {
pid_t pid;
struct cpu_info *cpu;
struct trapframe *tf;
+ struct vas addrsp;
TAILQ_ENTRY(proc) link;
};
diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c
index 266ce39..9231ea2 100644
--- a/sys/kern/kern_sched.c
+++ b/sys/kern/kern_sched.c
@@ -34,10 +34,20 @@
#include <sys/timer.h>
#include <sys/cdefs.h>
#include <sys/spinlock.h>
+#include <sys/loader.h>
+#include <sys/panic.h>
+#include <fs/initramfs.h>
#include <vm/dynalloc.h>
+#include <vm/physseg.h>
+#include <vm/pmap.h>
+#include <vm/map.h>
+#include <vm/vm.h>
#include <assert.h>
#include <string.h>
+#define STACK_PAGES 8
+#define STACK_SIZE (STACK_PAGES*vm_get_page_size())
+
/*
* Thread ready queue - all threads ready to be
* scheduled should be added to this queue.
@@ -119,12 +129,99 @@ sched_enter(void)
}
}
+static uintptr_t
+sched_init_stack(void *stack_top, char *argvp[], char *envp[], struct auxval auxv)
+{
+ uintptr_t *sp = stack_top;
+ size_t envp_len, argv_len, len;
+ uintptr_t old_sp = 0;
+ uintptr_t ret;
+
+ for (envp_len = 0; envp[envp_len] != NULL; ++envp_len) {
+ len = strlen(envp[envp_len]);
+ sp = (void *)((uintptr_t)sp - len - 1);
+ memcpy(sp, envp[envp_len], len);
+ }
+
+ for (argv_len = 0; argvp[argv_len] != NULL; ++argv_len) {
+ len = strlen(argvp[argv_len]);
+ sp = (void *)((uintptr_t)sp - len - 1);
+ memcpy(sp, argvp[envp_len], len);
+ }
+
+ sp = (uint64_t *)(((uintptr_t)sp / 16) * 16);
+ if (((argv_len + envp_len + 1) & 1) != 0) {
+ sp--;
+ }
+
+ *--sp = 0;
+ *--sp = 0;
+ *--sp = auxv.at_entry;
+ *--sp = AT_ENTRY;
+ *--sp = auxv.at_phent;
+ *--sp = AT_PHENT;
+ *--sp = auxv.at_phnum;
+ *--sp = AT_PHNUM;
+ *--sp = auxv.at_phdr;
+ *--sp = AT_PHDR;
+
+ old_sp = (uintptr_t)sp;
+
+ /* End of envp */
+ *--sp = 0;
+ sp -= envp_len;
+ for (int i = 0; i < envp_len; ++i) {
+ old_sp -= strlen(envp[i]) + 1;
+ sp[i] = old_sp;
+ }
+
+ /* End of argvp */
+ *--sp = 0;
+ sp -= argv_len;
+ for (int i = 0; i < argv_len; ++i) {
+ old_sp -= strlen(argvp[i]) + 1;
+ sp[i] = old_sp;
+ }
+
+ /* Argc */
+ *--sp = argv_len;
+
+ ret = (uintptr_t)stack_top;
+ ret -= (ret - (uintptr_t)sp);
+ return ret;
+}
+
+static uintptr_t
+sched_create_stack(struct vas vas, bool user)
+{
+ int status;
+ uintptr_t user_stack;
+ const vm_prot_t USER_STACK_PROT = PROT_WRITE | PROT_USER;
+
+ if (!user) {
+ return (uintptr_t)dynalloc(STACK_SIZE);
+ }
+
+ user_stack = vm_alloc_pageframe(STACK_PAGES);
+
+ status = vm_map_create(vas, user_stack, user_stack, USER_STACK_PROT,
+ STACK_SIZE);
+
+ if (status != 0) {
+ return 0;
+ }
+
+ memset(PHYS_TO_VIRT(user_stack), 0, STACK_SIZE);
+ return user_stack;
+}
+
static struct proc *
-sched_create_td(uintptr_t rip)
+sched_create_td(uintptr_t rip, char *argvp[], char *envp[], struct auxval auxv,
+ struct vas vas, bool is_user)
{
- const size_t STACK_SIZE = 0x100000; /* 1 MiB */
struct proc *td;
- void *stack;
+ uintptr_t stack, sp;
+ void *stack_virt;
struct trapframe *tf;
tf = dynalloc(sizeof(struct trapframe));
@@ -132,29 +229,37 @@ sched_create_td(uintptr_t rip)
return NULL;
}
- stack = dynalloc(STACK_SIZE);
- if (stack == NULL) {
+ stack = sched_create_stack(vas, is_user);
+ if (stack == 0) {
dynfree(tf);
return NULL;
}
+ stack_virt = (is_user) ? PHYS_TO_VIRT(stack) : (void *)stack;
+
td = dynalloc(sizeof(struct proc));
if (td == NULL) {
+ /* TODO: Free stack */
dynfree(tf);
- dynfree(stack);
return NULL;
}
memset(tf, 0, sizeof(struct trapframe));
- memset(stack, 0, STACK_SIZE);
+ sp = sched_init_stack((void *)((uintptr_t)stack_virt + STACK_SIZE),
+ argvp, envp, auxv);
/* Setup process itself */
td->pid = 0; /* Don't assign PID until enqueued */
td->cpu = NULL; /* Not yet assigned a core */
td->tf = tf;
+ td->addrsp = vas;
/* Setup trapframe */
- init_frame(tf, rip, (uintptr_t)stack + STACK_SIZE - 1);
+ if (!is_user) {
+ init_frame(tf, rip, sp);
+ } else {
+ init_frame_user(tf, rip, VIRT_TO_PHYS(sp));
+ }
return td;
}
@@ -193,20 +298,40 @@ sched_context_switch(struct trapframe *tf)
sched_enqueue_td(td);
}
+ pmap_switch_vas(vm_get_ctx(), next_td->addrsp);
sched_oneshot();
}
void
sched_init(void)
{
+ struct proc *init;
+ struct auxval auxv = {0};
+ struct vas vas = pmap_create_vas(vm_get_ctx());
+ const char *init_bin;
+
+ int status;
+ char *ld_path;
+ char *argv[] = {"/boot/init", NULL};
+ char *envp[] = {NULL};
+
TAILQ_INIT(&td_queue);
- /*
- * TODO: Create init with sched_create_td()
- * and enqueue with sched_enqueue_td()
- */
- (void)sched_create_td;
- (void)sched_enqueue_td;
+ if ((init_bin = initramfs_open("/boot/init")) == NULL) {
+ panic("Could not open /boot/init\n");
+ }
+
+ status = loader_load(vas, init_bin, &auxv, 0, &ld_path);
+ if (status != 0) {
+ panic("Could not load init\n");
+ }
+
+ init = sched_create_td((uintptr_t)auxv.at_entry, argv, envp, auxv, vas, true);
+ if (init == NULL) {
+ panic("Failed to create thread for init\n");
+ }
+
+ sched_enqueue_td(init);
}
/*
diff --git a/usr.sbin/init/init b/usr.sbin/init/init
deleted file mode 100755
index 8b83844..0000000
--- a/usr.sbin/init/init
+++ /dev/null
Binary files differ
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 05:55:47 +0000