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-rw-r--r--kernel/application.cpp280
1 files changed, 0 insertions, 280 deletions
diff --git a/kernel/application.cpp b/kernel/application.cpp
deleted file mode 100644
index af31a09..0000000
--- a/kernel/application.cpp
+++ /dev/null
@@ -1,280 +0,0 @@
-#include <hilbert/kernel/application.hpp>
-#include <hilbert/kernel/paging.hpp>
-
-//TODO - scheduling.
-
-namespace hilbert::kernel::application {
-
- app_instance::app_instance()
- : state(app_state::paused), framebuffer_vaddr(0) {
-
- uint64_t p4_vaddr;
- paging::map_new_kernel_page(p4_vaddr, p4_paddr);
- p4 = (uint64_t *)p4_vaddr;
-
- uint64_t p3_paddr;
- uint64_t p3_vaddr;
- paging::map_new_kernel_page(p3_vaddr, p3_paddr);
- p3 = (uint64_t *)p3_vaddr;
-
- for (int i = 1; i < 511; ++i)
- p4[i] = 0;
- p4[0] = paging::encode_pte(p3_paddr, true, true, true);
- p4[511] = paging::kernel_p4e;
-
- for (int i = 0; i < 512; ++i) {
- p3[i] = 0;
- p2s[i] = 0;
- p1s[i] = 0;
- p1es_to_free_on_exit[i] = 0;
- }
-
- }
-
- void app_instance::map_page(uint64_t vaddr, uint64_t paddr,
- bool write, bool execute, bool free_pram_on_exit
- ) {
-
- uint64_t i = ((vaddr / 4096) / 512) / 512;
- uint64_t j = ((vaddr / 4096) / 512) % 512;
- uint64_t k = (vaddr / 4096) % 512;
-
- if (p2s[i] == 0) {
- uint64_t p2_paddr;
- uint64_t p2_vaddr;
- paging::map_new_kernel_page(p2_vaddr, p2_paddr);
- p3[i] = paging::encode_pte(p2_paddr, true, true, true);
- p2s[i] = (uint64_t *)p2_vaddr;
- p1s[i] = new uint64_t *[512];
- p1es_to_free_on_exit[i] = new bool *[512];
- for (int u = 0; u < 512; ++u) {
- p2s[i][u] = 0;
- p1s[i][u] = 0;
- p1es_to_free_on_exit[i][u] = 0;
- }
- }
-
- if (p2s[i][j] == 0) {
- uint64_t p1_paddr;
- uint64_t p1_vaddr;
- paging::map_new_kernel_page(p1_vaddr, p1_paddr);
- p2s[i][j] = paging::encode_pte(p1_paddr, true, true, true);
- p1s[i][j] = (uint64_t *)p1_vaddr;
- p1es_to_free_on_exit[i][j] = new bool[512];
- for (int u = 0; u < 512; ++u) {
- p1s[i][j][u] = 0;
- p1es_to_free_on_exit[i][j][u] = false;
- }
- }
-
- p1s[i][j][k] = paging::encode_pte(paddr, true, write, execute);
- p1es_to_free_on_exit[i][j][k] = free_pram_on_exit;
-
- }
-
- bool app_instance::is_page_owned(uint64_t vaddr) {
- uint64_t i = ((vaddr / 4096) / 512) / 512;
- uint64_t j = ((vaddr / 4096) / 512) % 512;
- uint64_t k = (vaddr / 4096) % 512;
- return
- i < 512 && p1s[i] != 0 && p1s[i][j] != 0 &&
- p1s[i][j][k] != 0 && p1es_to_free_on_exit[i][j][k];
- }
-
- uint64_t app_instance::get_free_vaddr_pages(uint64_t count) {
- uint64_t start = 0x200000 / 4096;
- uint64_t length = 0;
- while (start + length <= 0x8000000000 / 4096) {
- if (length == count)
- return start * 4096;
- int i = ((start + length) / 512) / 512;
- int j = ((start + length) / 512) % 512;
- int k = (start + length) % 512;
- if (p1s[i] == 0 || p1s[i][j] == 0 || p1s[i][j][k] == 0)
- ++length;
- else {
- start += length + 1;
- length = 0;
- }
- }
- //TODO: handle out of memory
- return 0;
- }
-
- uint64_t app_instance::count_mapped_vram_pages() {
- uint64_t count = 0;
- for (int i = 0; i < 512; ++i)
- if (p1s[i] != 0)
- for (int j = 0; j < 512; ++j)
- if (p1s[i][j] != 0)
- for (int k = 0; k < 512; ++k)
- if (p1s[i][j][k] != 0)
- ++count;
- return count;
- }
-
- app_instance *running_app;
-
- static uint8_t correct_magic[16] = {
- 0x7f, 0x45, 0x4c, 0x46, 0x02, 0x01, 0x01, 0x00,
- 0x02, 0x00, 0x3e, 0x00, 0x01, 0x00, 0x00, 0x00
- };
-
-#define READ(a, b, c) \
- { \
- storage::fs_result _result = file.read_file(a, b, c); \
- if (_result == storage::fs_result::device_error) \
- return create_app_result::device_error; \
- if (_result == storage::fs_result::fs_corrupt) \
- return create_app_result::fs_corrupt; \
- }
-
- struct load_info {
- uint64_t foffset;
- uint64_t fsize;
- uint64_t vaddr;
- uint64_t vpages;
- bool writable;
- bool executable;
- };
-
- create_app_result create_app(
- const vfile::vfile &file, app_instance *&out,
- const vfile::vfile &working_dir
- ) {
-
- uint8_t magic[16];
- if (file.dir_entry.length < 64)
- return create_app_result::app_corrupt;
- READ(0, 8, magic)
- READ(16, 8, magic + 8)
- for (int i = 0; i < 16; ++i)
- if (magic[i] != correct_magic[i])
- return create_app_result::app_corrupt;
-
- uint64_t entry_point;
- uint64_t phead_start;
- uint16_t phead_entry_size;
- uint16_t phead_entry_count;
-
- READ(24, 8, &entry_point)
- READ(32, 8, &phead_start)
- READ(54, 2, &phead_entry_size)
- READ(56, 2, &phead_entry_count)
-
- if (file.dir_entry.length <
- phead_start + phead_entry_size * phead_entry_count)
- return create_app_result::app_corrupt;
-
- utility::vector<load_info> load_infos;
-
- for (uint16_t i = 0; i < phead_entry_count; ++i) {
-
- uint64_t entry_start = phead_start + phead_entry_size * i;
-
- uint32_t seg_type;
- READ(entry_start, 4, &seg_type)
- if (seg_type != 1)
- continue;
-
- uint64_t foffset;
- uint64_t vaddr;
- uint64_t fsize;
- uint64_t vsize;
- uint32_t flags;
-
- READ(entry_start + 8, 8, &foffset)
- READ(entry_start + 16, 8, &vaddr)
- READ(entry_start + 32, 8, &fsize)
- READ(entry_start + 40, 8, &vsize)
- READ(entry_start + 4, 4, &flags)
-
- if (vaddr & 4095)
- return create_app_result::app_corrupt;
- if (file.dir_entry.length < foffset + fsize)
- return create_app_result::app_corrupt;
- if (fsize > vsize)
- return create_app_result::app_corrupt;
-
- if (vaddr < 0x200000)
- return create_app_result::app_corrupt;
-
- uint64_t vpages = (vsize - 1) / 4096 + 1;
-
- if (vaddr + vpages * 4096 > 0x8000000000)
- return create_app_result::app_corrupt;
-
- load_info info = {
- .foffset = foffset,
- .fsize = fsize,
- .vaddr = vaddr,
- .vpages = vpages,
- .writable = (flags & 2) == 2,
- .executable = (flags & 1) == 1
- };
- load_infos.add_end(info);
-
- }
-
- out = new app_instance();
-
- for (unsigned i = 0; i < load_infos.count; ++i) {
- const auto &info = load_infos.buffer[i];
- for (uint64_t j = 0; j < info.vpages; ++j) {
- uint64_t paddr = paging::take_pram_page();
- out->map_page(info.vaddr + j * 4096, paddr,
- info.writable, info.executable, true);
- uint64_t kvaddr = paging::find_unmapped_vram_region(1);
- paging::map_kernel_page(paddr, kvaddr, true, false);
- storage::fs_result result = storage::fs_result::success;
- if (info.fsize > j * 4096) {
- if (info.fsize >= j * 4096 + 4096)
- result = file.read_file(
- info.foffset + j * 4096, 4096, (void *)kvaddr);
- else {
- int to_read = info.fsize - j * 4096;
- result = file.read_file(
- info.foffset + j * 4096, to_read, (void *)kvaddr);
- uint8_t *blank = (uint8_t *)(kvaddr + to_read);
- for (int i = 0; i < 4096 - to_read; ++i)
- blank[i] = 0;
- }
- }
- else {
- uint8_t *blank = (uint8_t *)kvaddr;
- for (int i = 0; i < 4096; ++i)
- blank[i] = 0;
- }
- paging::unmap_kernel_page(kvaddr);
- if (result == storage::fs_result::device_error) {
- delete out;
- return create_app_result::device_error;
- }
- if (result == storage::fs_result::fs_corrupt) {
- delete out;
- return create_app_result::fs_corrupt;
- }
- }
- }
-
- for (uint64_t vaddr = 0x1000; vaddr < 0x1ff000; vaddr += 4096) {
- uint64_t paddr = paging::take_pram_page();
- uint64_t kvaddr = paging::find_unmapped_vram_region(1);
- paging::map_kernel_page(paddr, kvaddr, true, false);
- uint8_t *p = (uint8_t *)kvaddr;
- for (int i = 0; i < 4096; ++i)
- p[i] = 0;
- paging::unmap_kernel_page(kvaddr);
- out->map_page(vaddr, paddr, true, false, true);
- }
-
- out->saved_regs.rsp = 0x1ff000;
- out->saved_regs.rip = entry_point;
-
- out->working_dir = working_dir;
-
- return create_app_result::success;
-
- }
-
-}
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