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vm: replace vm-region with address-space

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address-space is a non-recursive data structure, which contains a flat list of vm_areas representing
mapped vm-objects.

userspace programs can no longer create sub-address-spaces. instead, they can reserve portions of
the address space, and use that reserved space to create mappings.
This commit is contained in:
max 🍓
2026-03-13 19:44:50 +00:00
parent c6b0bee827
commit c628390f4a
28 changed files with 1719 additions and 2612 deletions
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50
kernel/channel.c
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@@ -1,10 +1,10 @@
#include <kernel/address-space.h>
#include <kernel/channel.h>
#include <kernel/msg.h>
#include <kernel/port.h>
#include <kernel/task.h>
#include <kernel/thread.h>
#include <kernel/util.h>
#include <kernel/vm-region.h>
#include <mango/signal.h>
#define CHANNEL_CAST(p) OBJECT_C_CAST(struct channel, c_base, &channel_type, p)
@@ -167,13 +167,13 @@ extern kern_status_t channel_recv_msg(
struct task *sender = msg->msg_sender_thread->tr_parent;
struct task *receiver = self->tr_parent;
struct vm_region *src = sender->t_address_space,
*dst = receiver->t_address_space;
struct address_space *src = sender->t_address_space,
*dst = receiver->t_address_space;
unsigned long f;
vm_region_lock_pair_irqsave(src, dst, &f);
address_space_lock_pair_irqsave(src, dst, &f);
kern_status_t status = vm_region_memmove_v(
kern_status_t status = address_space_memmove_v(
dst,
0,
out_msg->msg_data,
@@ -182,7 +182,7 @@ extern kern_status_t channel_recv_msg(
0,
msg->msg_req.msg_data,
msg->msg_req.msg_data_count,
VM_REGION_COPY_ALL,
ADDRESS_SPACE_COPY_ALL,
NULL);
if (status != KERN_OK) {
@@ -210,7 +210,7 @@ extern kern_status_t channel_recv_msg(
&sender->t_handles_lock,
&receiver->t_handles_lock,
f);
vm_region_unlock_pair_irqrestore(src, dst, f);
address_space_unlock_pair_irqrestore(src, dst, f);
if (status != KERN_OK) {
kmsg_reply_error(msg, status, &msg_lock_flags);
@@ -250,12 +250,12 @@ extern kern_status_t channel_reply_msg(
/* the task that is about to send the response */
struct task *sender = self->tr_parent;
struct vm_region *src = sender->t_address_space,
*dst = receiver->t_address_space;
struct address_space *src = sender->t_address_space,
*dst = receiver->t_address_space;
unsigned long f;
vm_region_lock_pair_irqsave(src, dst, &f);
address_space_lock_pair_irqsave(src, dst, &f);
kern_status_t status = vm_region_memmove_v(
kern_status_t status = address_space_memmove_v(
dst,
0,
msg->msg_resp.msg_data,
@@ -264,7 +264,7 @@ extern kern_status_t channel_reply_msg(
0,
reply->msg_data,
reply->msg_data_count,
VM_REGION_COPY_ALL,
ADDRESS_SPACE_COPY_ALL,
NULL);
if (status != KERN_OK) {
@@ -292,7 +292,7 @@ extern kern_status_t channel_reply_msg(
&sender->t_handles_lock,
&receiver->t_handles_lock,
f);
vm_region_unlock_pair_irqrestore(src, dst, f);
address_space_unlock_pair_irqrestore(src, dst, f);
if (status != KERN_OK) {
kmsg_reply_error(msg, status, &msg_lock_flags);
@@ -308,7 +308,7 @@ extern kern_status_t channel_read_msg(
struct channel *channel,
msgid_t id,
size_t offset,
struct vm_region *dest_region,
struct address_space *dest_region,
const kern_iovec_t *dest_iov,
size_t dest_iov_count,
size_t *nr_read)
@@ -325,13 +325,13 @@ extern kern_status_t channel_read_msg(
return KERN_INVALID_ARGUMENT;
}
struct vm_region *src_region
struct address_space *src_region
= msg->msg_sender_thread->tr_parent->t_address_space;
unsigned long f;
vm_region_lock_pair_irqsave(src_region, dest_region, &f);
address_space_lock_pair_irqsave(src_region, dest_region, &f);
kern_status_t status = vm_region_memmove_v(
kern_status_t status = address_space_memmove_v(
dest_region,
0,
dest_iov,
@@ -340,9 +340,9 @@ extern kern_status_t channel_read_msg(
offset,
msg->msg_req.msg_data,
msg->msg_req.msg_data_count,
VM_REGION_COPY_ALL,
ADDRESS_SPACE_COPY_ALL,
nr_read);
vm_region_unlock_pair_irqrestore(src_region, dest_region, f);
address_space_unlock_pair_irqrestore(src_region, dest_region, f);
spin_unlock_irqrestore(&msg->msg_lock, msg_lock_flags);
@@ -353,7 +353,7 @@ extern kern_status_t channel_write_msg(
struct channel *channel,
msgid_t id,
size_t offset,
struct vm_region *src_region,
struct address_space *src_region,
const kern_iovec_t *src_iov,
size_t src_iov_count,
size_t *nr_written)
@@ -370,13 +370,13 @@ extern kern_status_t channel_write_msg(
return KERN_INVALID_ARGUMENT;
}
struct vm_region *dest_region
struct address_space *dest_region
= msg->msg_sender_thread->tr_parent->t_address_space;
unsigned long f;
vm_region_lock_pair_irqsave(src_region, dest_region, &f);
address_space_lock_pair_irqsave(src_region, dest_region, &f);
kern_status_t status = vm_region_memmove_v(
kern_status_t status = address_space_memmove_v(
dest_region,
offset,
msg->msg_resp.msg_data,
@@ -385,9 +385,9 @@ extern kern_status_t channel_write_msg(
0,
src_iov,
src_iov_count,
VM_REGION_COPY_ALL,
ADDRESS_SPACE_COPY_ALL,
nr_written);
vm_region_unlock_pair_irqrestore(src_region, dest_region, f);
address_space_unlock_pair_irqrestore(src_region, dest_region, f);
spin_unlock_irqrestore(&msg->msg_lock, msg_lock_flags);