Makefile

@@ -29,11 +29,11 @@ deps=$(csrc:%.c=%.d) $(gasmsrc:%.S=%.d)
 docsrc=$(wildcard docs/*.md)
 docobj=$(docsrc:%.md=%.html)
 
-kernel kernel.sym &: $(asmobj) $(gasmobj) $(cobj) linker.ld
+kernel kernel.debug &: $(asmobj) $(gasmobj) $(cobj) linker.ld
 	$(LD) $(LDFLAGS) $(asmobj) $(gasmobj) $(cobj) -o kernel -T linker.ld $(LIBGCC) -Map kernel.map
-	objcopy --only-keep-debug kernel kernel.sym
+	objcopy --only-keep-debug kernel kernel.debug
 	objcopy --strip-debug  kernel
-	objcopy --add-gnu-debuglink=kernel.sym kernel
+	objcopy --add-gnu-debuglink=kernel.debug kernel
 
 fd.iso: kernel
 	mkdir -p isodir/boot/grub
@@ -90,7 +90,7 @@ run:kernel disk.img          ## Run the OS on qemu
 
 debug: CFLAGS += $(DEBUG_FLAGS) ## Run the OS on qemu and attach a debugger to it (may need a clean befor to have the debug symbols)
 debug: CXXFLAGS += $(DEBUG_FLAGS)
-debug:kernel kernel.sym disk.img
+debug:kernel kernel.debug disk.img
 	gdb -q -x debug.gdb
 
 debug_test: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST
@@ -100,7 +100,7 @@ screenshot:
 	shutter --window=qemu -o screenshot_1.png -e && zopflipng screenshot_1.png screenshot_1.png
 
 clean:
-	$(RM) kernel $(asmobj) $(gasmobj) $(cobj) $(deps) $(cinc) fd.iso kernel.sym kernel.map $(docobj)
+	$(RM) kernel $(asmobj) $(gasmobj) $(cobj) $(deps) $(cinc) fd.iso kernel.debug kernel.map $(docobj)
 	$(RM) -r isodir
 
 .PHONY:

arch/x86/exception.c

@@ -46,9 +46,8 @@ int exceptionSetRoutine(int exception, exception_handler handler)
 void print_handler(struct cpu_state *frame, ulong intr)
 {
     int intNbInt = intr;
-    VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d %d", intNbInt, intr);
-    printf("Exception %d (Err %d) at 0x%x\n", intr, intr,
-           cpu_context_get_PC(frame));
+    VGAPrintf(RED, BLACK, 0, VGA_HEIGHT - 1, "EXCEPTION %d", intNbInt);
+    printf("Exception %lu at 0x%p\n", intr, (void *)cpu_context_get_PC(frame));
     asm("hlt");
 }
 
@@ -62,9 +61,8 @@ void pagefault_handler(struct cpu_state *frame, ulong intr)
     if(!uAddrSpaceCheckNAlloc(as, faultAddr))
         return;
 
-
-    printf("page fault while in thread [%s] at 0x%x when trying to access 0x%x err_code 0x%x\n", current->name,
-           cpu_context_get_PC(frame), faultAddr, cpu_context_get_EX_err(frame));
+    printf("page fault while in thread [%s] at 0x%p when trying to access 0x%p err_code 0x%x\n", current->name,
+           (void *)cpu_context_get_PC(frame), (void *)faultAddr, cpu_context_get_EX_err(frame));
     if (cpu_context_is_in_user_mode(frame)) {
         printf("Killing User Thread\n");
         threadExit();

core/alloc.c

@@ -81,7 +81,7 @@ int allocBookSlab(size_t sizeEl, size_t sizeSlab, int selfContained, int neverEm
     int ret;
     int flags;
 
-    pr_devel("%s for element of size %lu is self %d\n", __func__, sizeEl, selfContained);
+    pr_devel("%s for element of size %u is self %d\n", __func__, sizeEl, selfContained);
 
     disable_IRQs(flags);
     list_foreach(slub, slab, slabIdx)
@@ -229,7 +229,7 @@ static void *allocFromSlab(struct slabEntry *slab)
     vaddr_t *next = slab->freeEl;
 
     if (*next == (vaddr_t)NULL) {
-        pr_devel("Slab @%d is now full\n", slab);
+        pr_devel("Slab @%p is now full\n", slab);
         slab->full = 1;
     }
     slab->freeEl = (void *)(*next);

core/allocArea.c

@@ -191,7 +191,7 @@ int areaAdd(vaddr_t start, vaddr_t end, int isFree)
     struct memArea **area;
 
     int nbPages = (end - start) / PAGE_SIZE;
-    pr_devel("Add %s area 0x%x->0x%x (%d)\n", isFree ? "free" : "used", start, end, nbPages);
+    pr_devel("Add %s area 0x%p->0x%p (%d)\n", isFree ? "free" : "used", (void *)start, (void *)end, nbPages);
 
     assert(nbPages > 0);
     assert(IS_ALIGNED(start, PAGE_SIZE));
@@ -258,7 +258,7 @@ int areaFree(vaddr_t addr)
 
     area = areaFindMemArea(usedArea, addr);
     if (!area) {
-        pr_info("Cannot find memArea associated to %p\n", addr);
+        pr_info("Cannot find memArea associated to %p\n", (void *)addr);
         return -1;
     }
 

core/elf.c

@@ -160,7 +160,7 @@ uaddr_t loadElfProg(const char *prog, struct process * proc)
         }
 
         if (elf_phdrs[i].p_vaddr < PAGING_BASE_USER_ADDRESS) {
-            printf("User program has an incorrect address 0x%x\n", elf_phdrs[i].p_vaddr);
+            printf("User program has an incorrect address 0x%p\n", (void *)elf_phdrs[i].p_vaddr);
             return (uaddr_t)NULL;
         }
 

core/klibc.c

@@ -447,7 +447,29 @@ int vsnprintf(char *str, size_t size, const char *format, va_list ap)
                                 break;
                             case 'i':
                             case 'd': PRINT_PART(printLint, long int, str, size, c, ret)
-                            case 'u': PRINT_PART(printLuint, long unsigned int, str, size, c, ret)
+                            case 'u':
+                                PRINT_PART(printLuint, long unsigned int, str, size, c, ret)
+                            case 'p':
+                            case 'x': {
+                                char val[sizeof(int) * 2];
+                                unsigned int valIdx = 0;
+                                long int d               = va_arg(ap, long int);
+                                itoa(d, val, 16);
+                                if (str) {
+                                    while (val[valIdx]) {
+                                        if (size) {
+                                            str[c++] = val[valIdx++];
+                                            size--;
+                                            ret++;
+                                        } else {
+                                            return ret;
+                                        }
+                                    }
+                                } else {
+                                    ret += strlen(val);
+                                }
+                                break;
+                            }
                         }
                         i++;
                         break;

core/klibc.h

@@ -31,9 +31,9 @@ int strcmp(const char s1[], const char s2[]);
 __attribute__ ((access (read_only, 2), access (write_only, 1, 3))) char *strzcpy(char *dst, const char *src, int len);
 int puts(const char *str);
 int putc(const char str);
-int vsnprintf(char *str, size_t size, const char *format, va_list ap);
-int vprintf(const char *format, va_list ap);
-int printf(const char *format, ...);
+int vsnprintf(char *str, size_t size, const char *format, va_list ap) __attribute__ ((__format__ (printf, 3, 0)));
+int vprintf(const char *format, va_list ap) __attribute__ ((__format__ (printf, 1, 0)));
+int printf(const char *format, ...) __attribute__ ((__format__ (printf, 1, 2)));
 
 // Could be used after malloc is available
 int asprintf(char **strp, const char *fmt, ...);

core/main.c

@@ -164,7 +164,7 @@ void kmain(unsigned long magic, unsigned long addr)
         }
 
         if (CHECK_FLAG(mbi->flags, 9)) {
-            printf("Loaded by %s. ", mbi->boot_loader_name);
+            printf("Loaded by %s. ", (char *)mbi->boot_loader_name);
         }
 
         /* Is the command line passed? */
@@ -215,9 +215,9 @@ void kmain(unsigned long magic, unsigned long addr)
         printf("Cannot get memory Mapping information, using default value\n");
         memAddBank(lastUsedByMem, upperMemKB * 1024, 1);
     }
-    printf("%d pages used by kernel(0x%x->0x%x))",
+    printf("%ld pages used by kernel(0x%lx->0x%lx))",
            (lastUsedByMem - firstUsedByMem) / PAGE_SIZE, firstUsedByMem, lastUsedByMem);
-    printf(" (%d pages for MM)\n", (lastUsedByMem - (paddr_t)&__ld_kernel_end) / PAGE_SIZE);
+    printf(" (%lu pages for MM)\n", (lastUsedByMem - (paddr_t)&__ld_kernel_end) / PAGE_SIZE);
 
 #ifdef RUN_TEST
     testPhymem();

core/mem.c

@@ -23,7 +23,7 @@ int memSetup(paddr_t upperMemKB, paddr_t *firstUsed, paddr_t *lastMemUsedOut)
     upperMemKB           = ALIGN_DOWN(upperMemKB, PAGE_SIZE / 1024);
     unsigned long nbPage = ((upperMemKB) / (PAGE_SIZE / 1024));
 
-    printf("Available Mem from 0x%x to 0x%x: %dMB in %d Pages of %dB\n", &__ld_kernel_end,
+    printf("Available Mem from 0x%lx to 0x%lx: %lu MB in %lu Pages of %dB\n",(paddr_t) &__ld_kernel_end,
            upperMemKB * 1024, (upperMemKB * 1024 - (uint32_t)&__ld_kernel_end) / (1024 * 1024),
            nbPage, PAGE_SIZE);
 

core/process.c

@@ -70,9 +70,9 @@ void processListPrint()
         list_foreach_named(proc->thList, th, nbTh, prevInProcess, nextInProcess)
         {
             if (th == cur) {
-                printf("    th: 0x%x Current\n", th);
+                printf("    th: 0x%lx Current\n", (vaddr_t)th);
             } else {
-                printf("    th: 0x%x in 0x%x\n", th, cpu_context_get_PC(th->cpuState));
+                printf("    th: 0x%lx in 0x%lx\n", (vaddr_t)th, cpu_context_get_PC(th->cpuState));
             }
         }
     }

core/stack.c

@@ -42,6 +42,6 @@ void printStackTrace(unsigned int maxFrames)
     printf("Must be compiled with -fno-omit-frame-pointer for full stack\n");
     unsigned int *ebp = &maxFrames - 2;
     unsigned int *eip  = ebp + sizeof(unsigned int);
-    printf("[0] 0x%x\n", eip);
+    printf("[0] 0x%x\n", (unsigned int)eip);
 #endif
 }

core/synchro.c

@@ -30,7 +30,7 @@ int mutexFree(struct mutex *m)
         if (list_is_empty(m->wait)) {
 #ifdef DEBUG
             if (m->owner) {
-                printf("Warning: freeing a owned mutex 0x%. owned by 0x%p 0x%p\n", m, m->owner,
+                printf("Warning: freeing a owned mutex 0x%p. owned by 0x%p 0x%p\n", m, m->owner,
                        getCurrentThread());
             }
 #endif

core/thread.c

@@ -5,6 +5,7 @@
 #include "klibc.h"
 #include "list.h"
 #include "mmuContext.h"
+#include "process.h"
 #include "time.h"
 #include "types.h"
 #include "vga.h"
@@ -67,7 +68,7 @@ struct thread *threadCreate(const char *name, cpu_kstate_function_arg1_t func, v
         return NULL;
     }
 #ifdef DEBUG
-    printf("Alloc stack at 0x%x struct at 0x%x\n", thread->stackAddr, thread);
+    printf("Alloc stack at 0x%p struct at 0x%p\n", (void *)thread->stackAddr, thread);
 #endif
     thread->stackSize = THREAD_DEFAULT_STACK_SIZE;
 
@@ -149,7 +150,7 @@ void threadDelete(struct thread *thread)
         processRemoveThread(thread);
 
 #ifdef DEBUG
-    printf("Free stack at 0x%x struct at 0x%x\n", thread->stackAddr, thread);
+    printf("Free stack at 0x%p struct at 0x%p\n", (void *)thread->stackAddr, thread);
 #endif
     free((void *)thread->stackAddr);
     free((void *)thread);
@@ -298,7 +299,7 @@ int threadMsleep(unsigned long msec)
     disable_IRQs(flags);
 
     current = currentThread;
-    assertmsg(current->state == RUNNING, "thread %s is in state %d for %d\n", current->name,
+    assertmsg(current->state == RUNNING, "thread %s is in state %d for %lu\n", current->name,
               current->state, msec);
 
     current->state              = SLEEPING;

core/uaddrspace.c

@@ -113,7 +113,7 @@ uaddr_t sysBrk(struct uAddrSpace *as, uaddr_t newHeapTop)
 
 int uAddrSpaceCheckNAlloc(struct uAddrSpace *as, vaddr_t addr)
 {
-    pr_devel("Checking %p inside %p and %p\n", addr, as->heapStart, as->heapStart +as->heapSize);
+    pr_devel("Checking %lx inside %lx and %lx\n", addr, as->heapStart, as->heapStart +as->heapSize);
     if (addr < as->heapStart || addr >= as->heapStart + as->heapSize) {
         return -1;
     }

debug.gdb

@@ -1,4 +1,9 @@
 add-symbol-file userspace/user
+# Thx to add-gnu-debuglink gdb should know that symbols are in kernel.debug.
+# And by default, it should be looking at executable.debug
+# But we still have to give him the executable he is suppose to debug (See https://sourceware.org/gdb/current/onlinedocs/gdb.html/Separate-Debug-Files.html)
+#add-symbol-file kernel.debug
+file kernel
 source custom_gdb_extension.py
 #For ASM sources
 directory arch/x86/:core

tests/test.c

@@ -69,8 +69,8 @@ void testPhymem(void)
     assert((usedPageStatAlloc - usedPageStatBegin) == (uint)allocCount);
 
     while ((allocated_page_list != NULL) && (page = list_pop_head(allocated_page_list)) != NULL) {
-        assertmsg(page->phy_addr == (ulong)freeCount, "page %d modified", page);
-        assertmsg(unrefPhyPage((ulong)page) >= 0, "Failed to free page %d\n", (ulong)page);
+        assertmsg(page->phy_addr == (ulong)freeCount, "page %p modified", page);
+        assertmsg(unrefPhyPage((ulong)page) >= 0, "Failed to free page %p\n", page);
         freeCount++;
     }
     printf("%d pages freed\n", freeCount);
@@ -117,7 +117,7 @@ void testAlloc(void)
     assert((char *)malloc2 == ((char *)malloc1 + sizeof(void *)));
     free(malloc2);
     void *malloc3 = malloc(sizeof(void *));
-    assertmsg((char *)malloc2 == (char *)malloc3, " %d %d\n", malloc2, malloc3);
+    assertmsg((char *)malloc2 == (char *)malloc3, " %p %p\n", malloc2, malloc3);
     free(malloc1);
     free(malloc3);
     void *alloc1 = testAllocNSet(1024);
@@ -169,8 +169,8 @@ void testPaging(void)
 
     while (!list_is_empty(allocated_page_list) &&
            (page = list_pop_head(allocated_page_list)) != NULL) {
-        assertmsg((char)page->phy_addr == (char)freeCount, "page modified %d but is %d\n",
-                  freeCount, page->phy_addr);
+        assertmsg((char)page->phy_addr == (char)freeCount, "page modified %d but is %p\n",
+                  freeCount, (void *)page->phy_addr);
         areaFree((vaddr_t)page);
         freeCount++;
     }
@@ -305,7 +305,7 @@ void sleepThread(void *arg)
         threadMsleep(100);
     }
     unsigned long ellapsedTime = jiffies_to_msecs(jiffies - initialJiffies);
-    assertmsg(ellapsedTime >= 500 && ellapsedTime < 510, "ellapsedTime %d\n", ellapsedTime);
+    assertmsg(ellapsedTime >= 500 && ellapsedTime < 510, "ellapsedTime %lu\n", ellapsedTime);
     threadMsleep(0);
     printf("I should never be showed\n");
     assert(1);

userspace/libc.c

@@ -257,7 +257,7 @@ int vsnprintf(char *str, size_t size, const char *format, va_list ap)
     int i   = 0;
     int c   = 0;
 
-    while (format[i] != '\0' && (size|| !str)) {
+    while (format[i] != '\0' && (size || !str)) {
         switch (format[i]) {
             case '%':
                 switch (format[i + 1]) {
@@ -443,7 +443,7 @@ int vasprintf(char **strp, const char *fmt, va_list ap)
 {
     int n       = 0;
     size_t size = 0;
-    char p[256]; //TODO replace by malloc
+    char *p = malloc(256);
 
     /* Determine required size */
 

userspace/libc.h

@@ -24,13 +24,13 @@ int strcmp(const char s1[], const char s2[]);
 __attribute__ ((access (read_only, 2), access (write_only, 1, 3))) char *strzcpy(char *dst, const char *src, int len);
 int puts(const char *str);
 int putc(const int c);
-int vsnprintf(char *str, size_t size, const char *format, va_list ap);
-int vprintf(const char *format, va_list ap);
-int printf(const char *format, ...);
+int vsnprintf(char *str, size_t size, const char *format, va_list ap) __attribute__ ((__format__ (printf, 3, 0)));
+int vprintf(const char *format, va_list ap) __attribute__ ((__format__ (printf, 1, 0)));
+int printf(const char *format, ...) __attribute__ ((__format__ (printf, 1, 2)));
 
 // Could be used after malloc is available
-int asprintf(char **strp, const char *fmt, ...);
-int vasprintf(char **strp, const char *fmt, va_list ap);
+int asprintf(char **strp, const char *fmt, ...) __attribute__ ((__format__ (printf, 2, 3)));
+int vasprintf(char **strp, const char *fmt, va_list ap) __attribute__ ((__format__ (printf, 2, 0)));
 
 int syscall5(int id, unsigned int arg1, unsigned int arg2, unsigned int arg3,
              unsigned int arg4, unsigned int arg5);