nathan/quark-kernel
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Massive backlog of changes

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This commit is contained in:
ngiddings
2022-06-15 15:59:31 -05:00
parent c962a83ff0
commit a52f06f81e
49 changed files with 1855 additions and 1083 deletions
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39
src/syscalls.c
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@@ -4,14 +4,17 @@
#include "stdio.h"
#include "types/status.h"
size_t test_syscall(struct kernel_t *kernel, size_t arg1, size_t arg2, size_t arg3)
size_t test_syscall(syscall_arg_t str)
{
printf("%s", (char*)arg1);
printf("%s", (char*)str.ptr);
return 17;
}
size_t mmap(struct kernel_t *kernel, size_t location, size_t length, size_t flags)
size_t mmap(syscall_arg_t arg_location, syscall_arg_t arg_length, syscall_arg_t arg_flags)
{
unsigned long location = arg_location.unsigned_int;
unsigned long length = arg_length.unsigned_int;
unsigned long flags = arg_flags.unsigned_int;
if(location % page_size != 0 || length % page_size != 0)
{
return S_INVALID_ARGUMENT;
@@ -22,7 +25,7 @@ size_t mmap(struct kernel_t *kernel, size_t location, size_t length, size_t flag
}
for(size_t i = 0; i < length; i += page_size)
{
if(page_type((void*)(location + i)) != PAGE_NOT_PRESENT)
if(page_type((void*)(location + i)) & PAGE_PRESENT)
{
return S_EXISTS;
}
@@ -31,12 +34,12 @@ size_t mmap(struct kernel_t *kernel, size_t location, size_t length, size_t flag
int status = S_OK;
while(n < length && status == S_OK)
{
physaddr_t frame = reserve_page(kernel->page_stack);
physaddr_t frame = reserve_page();
status = frame % page_size;
if(status == S_OK)
{
status = map_page(kernel->page_stack, (void*)(location + n), frame, PAGE_USERMODE | PAGE_RW);
if(status != S_OK && free_page(kernel->page_stack, frame) != S_OK)
status = map_page((void*)(location + n), frame, PAGE_USERMODE | PAGE_RW);
if(status != S_OK && free_page(frame) != S_OK)
{
panic("critical error reached during mmap.");
}
@@ -47,15 +50,17 @@ size_t mmap(struct kernel_t *kernel, size_t location, size_t length, size_t flag
break;
}
}
if(status != S_OK && munmap(kernel, location, page_size, NULL) != S_OK)
if(status != S_OK && munmap(arg_location, arg_length) != S_OK)
{
panic("critical error reached during mmap.");
}
return status;
}
size_t munmap(struct kernel_t *kernel, size_t location, size_t length, size_t arg3)
size_t munmap(syscall_arg_t arg_location, syscall_arg_t arg_length)
{
unsigned long location = arg_location.unsigned_int;
unsigned long length = arg_length.unsigned_int;
if(location % page_size != 0 || length % page_size != 0)
{
return S_INVALID_ARGUMENT;
@@ -68,21 +73,21 @@ size_t munmap(struct kernel_t *kernel, size_t location, size_t length, size_t ar
int status = S_OK;
while(n < length && status == S_OK)
{
enum page_type_t type = page_type((void*)(location + n));
int type = page_type((void*)(location + n));
physaddr_t frame;
if(type != PAGE_NOT_PRESENT)
if(type & PAGE_PRESENT)
{
frame = unmap_page((void*)(location + n));
}
if(type == PAGE_ANON)
{
status = free_page(kernel->page_stack, frame);
if(type & PAGE_ANON)
{
status = free_page(frame);
}
}
}
return status;
}
size_t terminate_self(struct kernel_t *kernel, size_t arg1, size_t arg2, size_t arg3)
size_t terminate_self()
{
return terminate_process(kernel, kernel->active_process->resource_id);
return terminate_process(active_process());
}