libc: Enable even more warnings

kernel/Makefile

@@ -4,7 +4,7 @@ MOON_OBJ := $(MOON_DIR)/lib
 MOON_BIN := $(MOON_DIR)/bin
 
 CFLAGS := -pedantic -Wall -Wextra -Werror -Wfloat-equal -Wdisabled-optimization -Wformat=2 -Winit-self -Wmissing-include-dirs -Wswitch-default -Wcast-qual -Wundef -Wcast-align -Wwrite-strings -Wlogical-op -Wredundant-decls -Wshadow -Wconversion -Os -ffreestanding -fstack-protector-all -fno-omit-frame-pointer -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -fshort-wchar -mcmodel=kernel -I$(MOON_DIR)/include -isystem $(MOON_DIR)/include/std
-CXXFLAGS := -fno-rtti -fno-exceptions  -Wsign-promo -Wstrict-null-sentinel  -Wctor-dtor-privacy
+CXXFLAGS := -fno-rtti -fno-exceptions -Wsign-promo -Wstrict-null-sentinel -Wctor-dtor-privacy
 ASMFLAGS := -felf64
 LDFLAGS := -T$(MOON_DIR)/moon.ld -nostdlib -lgcc -Wl,--build-id=none -z max-page-size=0x1000
 

kernel/src/memory/liballoc/liballoc.c

@@ -4,7 +4,7 @@
 
 #pragma GCC push_options
 #pragma GCC diagnostic ignored "-Wconversion"
-#pragma GCC diagnostic ignored "-Wsign-conversion"
+#pragma GCC diagnostic ignored "-Wsign-conversion" // FIXME: Actually solve these warnings.
 
 /**  Durand's Amazing Super Duper Memory functions.  */
 

libs/libc/Makefile

@@ -5,8 +5,8 @@ LIBC_BIN := $(LIBC_DIR)/bin
 
 DESTDIR ?= $(LUNA_BASE)/usr/lib
 
-CFLAGS := -Wall -Wextra -Werror -Os -nostdlib -fno-omit-frame-pointer -pedantic -Wfloat-equal -Wundef -Wcast-align -Wwrite-strings -Wlogical-op -Wredundant-decls -Wshadow
-CXXFLAGS := -fno-rtti -fno-exceptions
+CFLAGS := -Os -nostdlib -fno-omit-frame-pointer -pedantic -Wall -Wextra -Werror -Wfloat-equal -Wdisabled-optimization -Wformat=2 -Winit-self -Wmissing-include-dirs -Wswitch-default -Wcast-qual -Wundef -Wcast-align -Wwrite-strings -Wlogical-op -Wredundant-decls -Wshadow -Wconversion
+CXXFLAGS := -fno-rtti -fno-exceptions -Wsign-promo -Wstrict-null-sentinel -Wctor-dtor-privacy
 ASMFLAGS := -felf64
 
 rwildcard=$(foreach d,$(wildcard $(1:=/*)),$(call rwildcard,$d,$2) $(filter $(subst *,%,$2),$d))

libs/libc/include/luna/syscall.h

@@ -18,13 +18,13 @@ extern "C"
 {
 #endif
 
-    long int __luna_syscall0(int sys_num);
-    long int __luna_syscall1(int sys_num, unsigned long int arg0);
-    long int __luna_syscall2(int sys_num, unsigned long int arg0, unsigned long int arg1);
-    long int __luna_syscall3(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2);
-    long int __luna_syscall4(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
+    long int __luna_syscall0(long int sys_num);
+    long int __luna_syscall1(long int sys_num, unsigned long int arg0);
+    long int __luna_syscall2(long int sys_num, unsigned long int arg0, unsigned long int arg1);
+    long int __luna_syscall3(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2);
+    long int __luna_syscall4(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
                              unsigned long int arg3);
-    long int __luna_syscall5(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
+    long int __luna_syscall5(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
                              unsigned long int arg3, unsigned long int arg4);
 
 #ifdef __cplusplus

libs/libc/src/bits/bindings.c

@@ -20,7 +20,7 @@ void* liballoc_alloc(size_t size)
 
 int liballoc_free(void* address, size_t size)
 {
-    int result = syscall(SYS_munmap, address, size * 4096);
+    int result = (int)syscall(SYS_munmap, address, size * 4096);
     if (result < 0) return 1;
     else
         return 0;

libs/libc/src/bits/liballoc.c

@@ -1,5 +1,9 @@
 #include <bits/liballoc.h>
 
+#pragma GCC push_options
+#pragma GCC diagnostic ignored "-Wconversion"
+#pragma GCC diagnostic ignored "-Wsign-conversion" // FIXME: Actually solve these warnings.
+
 #include <stddef.h>
 #include <stdint.h>
 
@@ -105,9 +109,9 @@ static void* liballoc_memset(void* s, int c, size_t n)
 static void* liballoc_memcpy(void* s1, const void* s2, size_t n)
 {
     char* cdest;
-    char* csrc;
+    const char* csrc;
     unsigned int* ldest = (unsigned int*)s1;
-    unsigned int* lsrc = (unsigned int*)s2;
+    const unsigned int* lsrc = (const unsigned int*)s2;
 
     while (n >= sizeof(unsigned int))
     {
@@ -116,7 +120,7 @@ static void* liballoc_memcpy(void* s1, const void* s2, size_t n)
     }
 
     cdest = (char*)ldest;
-    csrc = (char*)lsrc;
+    csrc = (const char*)lsrc;
 
     while (n > 0)
     {
@@ -740,3 +744,5 @@ void* PREFIX(realloc)(void* p, size_t size)
 
     return ptr;
 }
+
+#pragma GCC pop_options

libs/libc/src/luna.cpp

@@ -14,7 +14,7 @@ extern "C"
 
     unsigned int msleep(unsigned int ms)
     {
-        return syscall(SYS_sleep, ms);
+        return (unsigned int)syscall(SYS_sleep, ms);
     }
 
     noreturn void __luna_abort(const char* message)

libs/libc/src/luna/syscall.c

@@ -1,34 +1,34 @@
 #include <luna/syscall.h>
 
-long int __luna_syscall0(int sys_num)
+long int __luna_syscall0(long int sys_num)
 {
     long int result;
     asm volatile("int $0x42" : "=a"(result) : "a"(sys_num));
     return result;
 }
 
-long int __luna_syscall1(int sys_num, unsigned long int arg0)
+long int __luna_syscall1(long int sys_num, unsigned long int arg0)
 {
     long int result;
     asm volatile("int $0x42" : "=a"(result) : "a"(sys_num), "D"(arg0));
     return result;
 }
 
-long int __luna_syscall2(int sys_num, unsigned long int arg0, unsigned long int arg1)
+long int __luna_syscall2(long int sys_num, unsigned long int arg0, unsigned long int arg1)
 {
     long int result;
     asm volatile("int $0x42" : "=a"(result) : "a"(sys_num), "D"(arg0), "S"(arg1));
     return result;
 }
 
-long int __luna_syscall3(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2)
+long int __luna_syscall3(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2)
 {
     long int result;
     asm volatile("int $0x42" : "=a"(result) : "a"(sys_num), "D"(arg0), "S"(arg1), "d"(arg2));
     return result;
 }
 
-long int __luna_syscall4(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
+long int __luna_syscall4(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
                          unsigned long int arg3)
 {
     long int result;
@@ -37,7 +37,7 @@ long int __luna_syscall4(int sys_num, unsigned long int arg0, unsigned long int
     return result;
 }
 
-long int __luna_syscall5(int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
+long int __luna_syscall5(long int sys_num, unsigned long int arg0, unsigned long int arg1, unsigned long int arg2,
                          unsigned long int arg3, unsigned long int arg4)
 {
     long int result;

libs/libc/src/printf.cpp

@@ -36,7 +36,7 @@ template <typename IntegerType> static char* __unsignedtoa(IntegerType number, c
     while (number != 0)
     {
         IntegerType r = number % (IntegerType)base;
-        arr[i] = (r > 9) ? (r - 10) + 'a' : r + '0';
+        arr[i] = (char)((r > 9) ? (r - 10) + 'a' : r + '0');
         i++;
         number /= base;
     }
@@ -68,7 +68,7 @@ template <typename IntegerType> static char* __signedtoa(IntegerType number, cha
     while (number != 0)
     {
         IntegerType r = number % base;
-        arr[i] = (r > 9) ? (r - 10) + 'a' : r + '0';
+        arr[i] = (char)((r > 9) ? (r - 10) + 'a' : r + '0');
         i++;
         number /= base;
     }
@@ -147,7 +147,7 @@ static int internal_printf(const char* format, PutString put_string_callback, ss
                 switch (current_char)
                 {
                 case 'c': {
-                    buffer[buffer_insert_index++] = va_arg(ap, int);
+                    buffer[buffer_insert_index++] = (char)va_arg(ap, int);
                     if (buffer_insert_index == 1024) flush_buffer();
                     break;
                 }
@@ -272,7 +272,7 @@ static int internal_printf(const char* format, PutString put_string_callback, ss
     }
 
     if (buffer_insert_index > 0) flush_buffer();
-    return written;
+    return (int)written;
 }
 
 #pragma GCC pop_options

libs/libc/src/stdio.cpp

@@ -51,7 +51,7 @@ extern "C"
     {
         long nwritten = syscall(SYS_write, s, strlen(s));
         nwritten += syscall(SYS_write, "\n", 1);
-        return nwritten;
+        return (int)nwritten;
     }
     int snprintf(char* str, size_t max, const char* format, ...)
     {

libs/libc/src/string.cpp

@@ -5,7 +5,7 @@ extern "C"
 {
     void* memcpy(void* dest, const void* src, size_t n)
     {
-        for (size_t i = 0; i < n; ++i) { *((char*)dest + i) = *((char*)src + i); }
+        for (size_t i = 0; i < n; ++i) { *((char*)dest + i) = *((const char*)src + i); }
         return dest;
     }
 
@@ -41,7 +41,7 @@ extern "C"
         size_t dest_len = strlen(dest);
         size_t i;
 
-        for (i = 0; *(src + i); i++) *(char*)(dest + dest_len + i) = *(char*)(src + i);
+        for (i = 0; *(src + i); i++) *(char*)(dest + dest_len + i) = *(const char*)(src + i);
 
         *(char*)(dest + dest_len + i) = '\0';
 
@@ -53,7 +53,7 @@ extern "C"
         size_t dest_len = strlen(dest);
         size_t i;
 
-        for (i = 0; i < n && *(src + i); i++) *(char*)(dest + dest_len + i) = *(char*)(src + i);
+        for (i = 0; i < n && *(src + i); i++) *(char*)(dest + dest_len + i) = *(const char*)(src + i);
 
         *(char*)(dest + dest_len + i) = '\0';