Merge branch 'master' of ssh://git.dehosting.club:3022/quintenk/kornos

Makefile

@@ -25,7 +25,7 @@ bochs: $(KERNEL_HDD) ext/bochsrc
 	rm bochsout.txt
 
 gdb:
-	QEMUFLAGS="-s -S" $(MAKE) run & gdb -x ext/gdbinit
+	QEMUFLAGS="-s -S" $(MAKE) run & (sleep 1; gdb -x ext/gdbinit)
 
 ext/limine/limine-install:
 	$(MAKE) -C ext/limine/ limine-install

kernel/Makefile

@@ -10,7 +10,7 @@ LDSCRIPT        = make/$(ARCH)/linker.ld
 
 CFLAGS          ?= -Og -g
 CFLAGS          := $(CFLAGS) $(ARCH_CFLAGS) \
-                   -Wall -Wextra -pedantic -Wno-language-extension-token -std=gnu11 -I../ext -Isrc -fPIE
+                   -Wall -Wextra -pedantic -std=gnu11 -I../ext -Isrc -fPIE
 LDFLAGS         := $(LDFLAGS) -T $(LDSCRIPT) 
 
 
@@ -31,13 +31,11 @@ $(ARCHES):
 
 bin/$(TARGET)-$(ARCH): $(OBJ)
 	@mkdir -p $(@D)
-	@echo Linking $@
 	$(LD) $(LDFLAGS) $(OBJ) -o $@
 
-obj/$(ARCH)/%.c.o: src/%.c $(HFILES)
+obj/$(ARCH)/%.c.o: src/%.c $(HFILES) $(ARCHHEADERS)
 	@mkdir -p $(@D)
-	@echo $(CC) $<
-	@$(CC) $(CFLAGS) -c $< -o $@
+	$(CC) $(CFLAGS) -c $< -o $@
 
 clean:
 	rm -rf bin obj zig-cache

kernel/make/x86/make.config

@@ -1,9 +1,12 @@
 ARCHFILES   := $(shell find src/arch/x86 -type f -name '*.c' -print) \
-				$(shell find src/arch/x86 -type f -name '*.nasm' -print) \
-				$(shell find src/arch/$(ARCH) -type f -name '*.nasm' -print)
+			   $(shell find src/arch/x86 -type f -name '*.nasm' -print) \
+			   $(shell find src/arch/$(ARCH) -type f -name '*.nasm' -print)
+ARCHHEADERS := $(shell find src/arch/x86 -type f -name '*.h' -print) \
+			   $(shell find src/arch/x86 -type f -name '*.nasminc' -print) \
+			   $(shell find src/arch/$(ARCH) -type f -name '*.nasminc' -print)
 ARCH_CFLAGS := -masm=intel
+NASMFLAGS := -Isrc
 
-obj/$(ARCH)/%.nasm.o: src/%.nasm
+obj/$(ARCH)/%.nasm.o: src/%.nasm $(ARCHHEADERS)
 	@mkdir -p $(@D)
-	@echo nasm $<
-	@$(NASM) $(NASMFLAGS) $< -o $@
+	$(NASM) $(NASMFLAGS) $< -o $@

kernel/src/arch/x86/bochs.c

@@ -1,3 +1,3 @@
 void breakpoint() {
-    asm volatile ("xchgw %bx, %bx");
+    __asm__ volatile ("xchgw %bx, %bx");
 }

kernel/src/arch/x86/ops.c

@@ -1,9 +1,9 @@
 
 #include <print/print.h>
 void halt_catch_fire() {
-    asm volatile ("cli");
+    __asm__ volatile ("cli");
     while(1) {
-        asm volatile ("hlt");
+        __asm__ volatile ("hlt");
         puts("INTERRUPTED!");
     };
 }

kernel/src/arch/x86_64/entry-stivale2.c

@@ -12,6 +12,8 @@
 static uint8_t stack[4096] = {0};
 void stivale2_main(struct stivale2_struct *info);
 
+extern void asmpanic();
+
 struct stivale2_header_tag_smp smp_request = {
     .tag = {
         .identifier = STIVALE2_HEADER_TAG_SMP_ID,
@@ -41,8 +43,9 @@ void stivale2_main(struct stivale2_struct *info) {
     );
     printf("PAGE TABLE AT: %x\n", cr3);
 
+    loadgdt();
     print_gdt();
 
-	char *argv[3] = {"stivale2", info->bootloader_brand, info->bootloader_version};
-    kmain(3, argv);
+    asmpanic();
+    kmain();
 }

kernel/src/arch/x86_64/gdt.nasm

@@ -1,10 +1,15 @@
 section .rodata
+align 8
 gdt64:
     dq 0
-.code: equ $-gdt64
+.codesys: equ $-gdt64
     dq (1<<44) | (1<<47) | (1<<41) | (1<<43) | (1<<53)
-.data: equ $ - gdt64
+.datasys: equ $-gdt64
     dq (1<<44) | (1<<47) | (1<<41)
+.codeusr: equ $-gdt64
+    dq (1<<44) | (1<<47) | (1<<41) | (1<<43) | (1<<53) | (3<<45)
+.datausr: equ $-gdt64
+    dq (1<<44) | (1<<47) | (1<<41) | (3<<45)
 .pointer:
     dw .pointer - gdt64 - 1
     dq gdt64
@@ -13,4 +18,18 @@ section .text
 global loadgdt
 loadgdt:
     lgdt [gdt64.pointer]
+    ; now what I tried unsuccessfully:
 
+    mov rax, gdt64.codesys;
+    push rax
+    mov rax, loadgdtdone
+    push rax   ; function to execute next
+    retfq               ; far return (pops address and code segment)
+loadgdtdone:
+    mov ax, gdt64.datasys
+    mov ss, ax
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+    ret

kernel/src/arch/x86_64/info.nasm

@@ -1,2 +1,8 @@
+%include "arch/x86_64/panic.nasminc"
+
 global archval
 archval db "x86_64-nasm", 0
+
+global asmpanic
+asmpanic:
+    PANIC "asmpanic"

kernel/src/arch/x86_64/panic.nasminc

@@ -0,0 +1,17 @@
+%ifndef PANIC_NASM_MAC
+    %define PANIC_NASM_MAC
+
+    extern panic
+
+    %macro PANIC 1
+    [SECTION .data]
+        panicval db  %1, 0
+        filename db __FILE__, 0
+    __SECT__
+        mov rdi, panicval
+        mov rsi, filename
+        mov rdx, __LINE__
+        call panic
+    %endmacro
+%endif
+