fix compiler warnings

6 files changed, 20 insertions, 18 deletions

diff --git a/i686/gdt.h b/i686/gdt.h
index 9148c3d..f00ff7f 100644
--- a/i686/gdt.h
+++ b/i686/gdt.h
@@ -14,9 +14,9 @@ struct __attribute__((packed)) Access {
   enum Ring privilege : 2; // descriptor privilege level
   bool present : 1;       // true for every active segment
 };
-_Static_assert(sizeof(struct Access) == 1);
+_Static_assert(sizeof(struct Access) == 1, "access byte size");
 
-static const struct Access null_access = {};
+static const struct Access null_access = {false, false, false, false, false, false, false};
 static const struct Access ktext_access = {.readwrite = true, .executable = true, .segment = true, .present = true};
 static const struct Access kdata_access = {.readwrite = true, .segment = true, .present = true};
 
@@ -43,7 +43,7 @@ struct __attribute__((packed)) SegmentDescriptor_t {
   bool granularity : 1;     // limit scaled by 4k when set
   uint8_t base_31_24;       // high bits of segment address
 };
-_Static_assert(sizeof(struct SegmentDescriptor_t) == 8);
+_Static_assert(sizeof(struct SegmentDescriptor_t) == 8, "segment descriptor size");
 
 void SegmentDescriptor(struct SegmentDescriptor_t *self, unsigned base, unsigned limit, uint8_t access);
 
diff --git a/i686/isr.c b/i686/isr.c
index 6fbe200..862f74a 100644
--- a/i686/isr.c
+++ b/i686/isr.c
@@ -17,30 +17,32 @@ abort_handler(struct interrupt_frame *frame)
 }
 
 __attribute__((interrupt)) void
-syscall_handler(struct interrupt_frame *)
+syscall_handler(__attribute__((unused)) struct interrupt_frame *frame)
 {
-  printf("syscall\n");
+  unsigned int n;
+  asm volatile("mov %%eax, %0" : "=r"(n));
+  printf("syscall %x\n, n");
   abort();
 }
 
 void pic_clear(unsigned char irq);
 
 __attribute__((interrupt)) void
-irq0x00(struct interrupt_frame *)
+irq0x00(__attribute__((unused)) struct interrupt_frame *frame)
 {
   pic_clear(0x00);
 }
 
 extern void ps2_keyboard_irq_handler();
 __attribute__((interrupt)) void
-irq0x01(struct interrupt_frame *)
+irq0x01(__attribute__((unused)) struct interrupt_frame *frame)
 {
   ps2_keyboard_irq_handler();
   pic_clear(0x01);
 }
 
 __attribute__((interrupt)) void
-irq0x0c(struct interrupt_frame *)
+irq0x0c(__attribute__((unused)) struct interrupt_frame *frame)
 {
   printf("irq 0x0c\n");
   pic_clear(0x0c);
diff --git a/i686/lidt.c b/i686/lidt.c
index 8a70bf3..59a2611 100644
--- a/i686/lidt.c
+++ b/i686/lidt.c
@@ -9,7 +9,7 @@ struct __attribute__((packed)) Pointer {
 
 enum Type {
   Null = 0,
-  Intr = 0b10001110, // 32-bit interrupt
+  Intr = 0x8e, // 1000 1110  32-bit interrupt
 };
 
 struct __attribute__((packed)) Gate_t {
@@ -19,7 +19,7 @@ struct __attribute__((packed)) Gate_t {
   uint8_t type;          // interrupt type
   uint16_t offset_31_16; // segment offset high
 };
-_Static_assert(sizeof(struct Gate_t) == 8);
+_Static_assert(sizeof(struct Gate_t) == 8, "interrupt gate size");
 
 void
 Gate(struct Gate_t *entry, void (*f)(struct interrupt_frame *), uint16_t selector)
@@ -47,7 +47,7 @@ idt_install()
   Gate(&interrupt_table[0x2c], &irq0x0c, 0x10);
 
   // syscall 0x80
-  Gate(&interrupt_table[0x80], &abort_handler, 0x10);
+  Gate(&interrupt_table[0x80], &syscall_handler, 0x10);
 
   const struct Pointer ptr = {.limit = sizeof(interrupt_table) - 1, .base = (unsigned)&interrupt_table};
   asm volatile("lidt (%0)" : : "a"(&ptr));
diff --git a/i686/paging.h b/i686/paging.h
index cff0506..f9c04a8 100644
--- a/i686/paging.h
+++ b/i686/paging.h
@@ -16,7 +16,7 @@ struct __attribute__((packed)) DirectoryEntry {
   unsigned int __available__ : 3; // available to the OS
   unsigned int address : 20;
 };
-_Static_assert(sizeof(struct DirectoryEntry) == 4);
+_Static_assert(sizeof(struct DirectoryEntry) == 4, "DirectoryEntry size");
 
 // DirectoryEntry4MB
 // |31|  |  |  |  |  |  |  |  |22|21|20|  |  |  |  |  |  |13|12|11|  | 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
@@ -38,7 +38,7 @@ struct __attribute__((packed)) DirectoryEntry4MB {
   unsigned rsvd : 1; // 21
   unsigned int address_low : 10;
 };
-_Static_assert(sizeof(struct DirectoryEntry4MB) == 4);
+_Static_assert(sizeof(struct DirectoryEntry4MB) == 4, "DirectoryEntry4M size");
 
 // TableEntry
 // |31|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |11|  | 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
@@ -56,4 +56,4 @@ struct __attribute__((packed)) TableEntry {
   unsigned int __available__ : 3; // available to the OS
   unsigned int address : 20;
 };
-_Static_assert(sizeof(struct TableEntry) == 4);
+_Static_assert(sizeof(struct TableEntry) == 4, "TableEntry size");
diff --git a/i686/sys/control.h b/i686/sys/control.h
index 0231236..1b38472 100644
--- a/i686/sys/control.h
+++ b/i686/sys/control.h
@@ -1,6 +1,6 @@
 #pragma once
 
-static void
+static inline void
 abort()
 {
   asm volatile(R"(cli
@@ -8,13 +8,13 @@ h: hlt
 jmp h)");
 }
 
-static void
+static inline void
 enable_interrupts()
 {
   asm volatile("sti");
 }
 
-static void
+static inline void
 disable_interrupts()
 {
   asm volatile("cli");
diff --git a/i686/sys/cpuid.h b/i686/sys/cpuid.h
index f2ffe37..862601f 100644
--- a/i686/sys/cpuid.h
+++ b/i686/sys/cpuid.h
@@ -12,7 +12,7 @@ struct CPUVersion {
   unsigned int family_ex : 8;
   unsigned int __unused_2 : 4;
 } __attribute__((packed, aligned(__alignof__(unsigned int))));
-_Static_assert(sizeof(struct CPUVersion) == sizeof(unsigned int));
+_Static_assert(sizeof(struct CPUVersion) == sizeof(unsigned int), "cpuid version struct size");
 
 unsigned int
 family(const struct CPUVersion v)