continue working on correct shell loading

Makefile

@@ -64,6 +64,9 @@ iso:
 
 	cp grubshit/caller katauos/katau/caller
 	cp grubshit/callee katauos/katau/callee
+	cp grubshit/callee2 katauos/katau/callee2
+
+	cp grubshit/zsh katauos/katau/zsh
 
 	sudo umount tmp/
 	grub-mkrescue -o boot.iso katauos/

include/kheap.h

@@ -5,7 +5,7 @@
 #include <stddef.h>
 
 #define KHEAP_START  0xE0000000  // Start of kernel heap
-#define KHEAP_INITIAL_SIZE 0x100000 // 1 MiB initial size
+#define KHEAP_INITIAL_SIZE 0x400000 // 1 MiB initial size
 #define KHEAP_END    (KHEAP_START + KHEAP_INITIAL_SIZE)
 #define KHEAP_PAGES  (KHEAP_INITIAL_SIZE / PAGE_SIZE)
 

src/kernel/kernel.c

@@ -134,7 +134,7 @@ void kmain(unsigned int magic, unsigned int info)
 	l9660_dir* dir = (l9660_dir*)malloc(sizeof(l9660_dir));
 	l9660_file* file = (l9660_file*)malloc(sizeof(l9660_file));
 
-	follow_path("/bin/bash.", file, dir);
+	follow_path("/katau/core.", file, dir);
 
 	exec_from_file(file, ".");
 

src/tasking/exec_from_file.c

@@ -68,12 +68,20 @@ void exec_from_file(l9660_file* fs_file, const char* dirname)
             continue;
         }
 
-        int pages_needed = DivRoundUp(elf_phdr->p_memsz, 0x1000);//(elf_phdr->p_memsz / 0x1000) + 1;
+        uint32_t start_addr = elf_phdr->p_vaddr;
+        uint32_t end_addr = start_addr + elf_phdr->p_memsz;
+
+        uint32_t start_page = start_addr & ~0xFFF;
+        uint32_t end_page = (end_addr - 1) & ~0xFFF;
+
+        int pages_needed = ((end_page - start_page) / 0x1000) + 1;
+
+        //int pages_needed = DivRoundUp(elf_phdr->p_memsz, 0x1000);//(elf_phdr->p_memsz / 0x1000) + 1;
         //debug_log("pages needed: %X\n", pages_needed);
 
         for(int j = 0; j < pages_needed; j++)
         {
-            uint32_t vaddr = (elf_phdr->p_vaddr & ~0xFFF) + j * 0x1000;
+            uint32_t vaddr = start_page + j * 0x1000;
             void* phys_addr = alloc_page();
 
             debug_log("mapping 0x%X -> 0x%X\n", phys_addr, vaddr);
@@ -131,6 +139,7 @@ void exec_from_file(l9660_file* fs_file, const char* dirname)
     *p_task1->cwd = dir;
 
     uint32_t brk_address = DivRoundUp(bss_end+1, 0x1000)*0x1000;
+    debug_log("initial brk address: 0x%X\n", brk_address);
     p_task1->brk = (void*)brk_address;
     
     asm volatile("sti");

src/tasking/syscalls.c

@@ -526,6 +526,11 @@ void handle_syscall(TrapFrame *tf)
             tf->eax = sys_brk(tf);
             break;
 
+        case 0x36://ioctl
+            debug_log("IOCTL WAS CALLED, FUCKFUCK!!!!\n");
+            tf->eax = -38;//-ENOSYS
+            break;
+        
         case 0xa2://nanosleep
             tf->eax = sys_nanosleep(tf);
             break;