networking refactor

Makefile

@@ -51,7 +51,10 @@ clean:
 	$(MAKE) -C modules $@
 	$(MAKE) -C libs $@
 	@echo "removing images"
-	$(RM) kernel.img kernel.elf dump
+	$(RM) -f kernel.img kernel.elf disk.img dump trace serial.log gdb_net.log screenlog.0 dump.dtb
+	$(RM) -f logs/*.log fs/kernel.elf
+	$(RM) -rf fs/redos/tools fs/redos/system fs/redos/user fs/redos/docs .cache
+	@find ./bin ./user ./tools ./modules ./kernel ./shared -type f \( -name dump -o -name '*.dump' -o -name '*.trace' -o -name '*.log' -o -name '*.tmp' \) -exec rm -f {} +
 
 raspi:
 	$(MAKE) LOAD_ADDR=0x80000 XHCI_CTX_SIZE=64 QEMU=true MODE=raspi all

kernel/exceptions/exception_handler.c

@@ -6,8 +6,10 @@
 #include "theme/theme.h"
 #include "std/string.h"
 #include "sysregs.h"
+#include "process/syscall.h"
 
 static bool panic_triggered = false;
+static bool panic_skip_trace = false;
 
 void set_exception_vectors(){
     extern char exception_vectors[];
@@ -27,7 +29,11 @@ void handle_exception(const char* type, uint64_t info) {
     char buf[STRING_MAX_LEN];//no heap to avoid corruption
     const char *fmt = "%s \r\nESR_EL1: %llx\r\nELR_EL1: %llx\r\nFAR_EL1: %llx";
     string_format_buf(buf, sizeof(buf), fmt,type,esr,elr,far);
+
+    bool old_panic_skip_trace = panic_skip_trace;
+    panic_skip_trace = syscall_depth > 0;
     panic(buf, info);
+    panic_skip_trace = old_panic_skip_trace;
 }
 
 void fiq_el1_handler(){ handle_exception("FIQ EXCEPTION\r\n", 0); }
@@ -61,6 +67,10 @@ void panic(const char* msg, uint64_t info) {
     uart_raw_puts("Additional info: ");
     uart_puthex(info);
     uart_raw_puts("\r\n");
+    if (!old_panic_triggered && !panic_skip_trace) {
+        uart_raw_puts("Backtrace:\r\n");
+        trace();
+    }
     uart_raw_puts("System Halted\r\n");
     if (!old_panic_triggered){
         char buf[STRING_MAX_LEN];

kernel/fw/fw_cfg.c

@@ -2,6 +2,7 @@
 #include "console/kio.h"
 #include "std/memory_access.h"
 #include "memory/mmu.h"
+#include "memory/addr.h"
 #include "async.h"
 #include "sysregs.h"
 #include "std/string.h"
@@ -44,7 +45,6 @@ void fw_cfg_dma_operation(void* dest, uint32_t size, uint32_t ctrl) {
     };
 
     write64(PHYS_TO_VIRT(FW_CFG_DMA), __builtin_bswap64(pt_va_to_pa(&access)));
-
     __asm__("isb");
 
     if (!wait(&access.control, __builtin_bswap32(~0x1), false, 2000)){
@@ -71,7 +71,7 @@ bool fw_find_file(const char* search, struct fw_cfg_file *file) {
 
     if (!fw_cfg_check())
         return false;
-
+        
     u32 count = 0;
     fw_cfg_dma_read(&count, sizeof(count), FW_LIST_DIRECTORY);
 

kernel/memory/addr.c

@@ -1,4 +1,5 @@
 #include "addr.h"
+#include "va_layout.h"
 
 #include "va_layout.h"
 

kernel/memory/page_allocator.c

@@ -186,6 +186,7 @@ void setup_page(uintptr_t address, uint8_t attributes){
 }
 
 paddr_t palloc_inner(uint64_t size, uint8_t level, uint8_t attributes, bool full, bool map) {
+    if (!size) return 0;
     if (!alloc_max_page) page_alloc_init();
     if (!page_alloc_high_va) page_alloc_enable_high_va();
     uint64_t page_count = count_pages(size,PAGE_SIZE);
@@ -263,10 +264,10 @@ paddr_t palloc_inner(uint64_t size, uint8_t level, uint8_t attributes, bool full
 
             uint64_t inv = ~mem_bitmap[i];
             uint64_t bit = __builtin_ctzll(inv);
-            if (bit > (64 - page_count)){ 
-                continue;
-            }
-            while (bit < 64) {
+            uint64_t max_bit = 64 - page_count;
+            if (bit > max_bit) continue;
+
+            while (bit <= max_bit) {
                 bool found = true;
                 for (uint64_t b = bit; b < bit + page_count; b++){
                     if ((mem_bitmap[i] >> b) & 1ull){
@@ -277,7 +278,7 @@ paddr_t palloc_inner(uint64_t size, uint8_t level, uint8_t attributes, bool full
                 }
                 if (found) break;
             }
-            if (bit >= 64) continue;
+            if (bit > max_bit) continue;
             uintptr_t first_address = 0;
             mem_page* prev_page = 0;