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OUTPUT_FORMAT("elf64-x86-64")

PHDRS {
    headers PT_PHDR PHDRS;
    text PT_LOAD FILEHDR PHDRS;
    data PT_LOAD;
}

SECTIONS {
    . = 0xffffffff80000000 + SIZEOF_HEADERS;
    .text : {
        *(.text)
        *(.text.*)
    } :text
    .rodata : {
        *(.rodata)
        *(.rodata.*)
    }

    .eh_frame_hdr : {
        __eh_frame_hdr = .;
        *(.eh_frame_hdr)
    }
    .eh_frame : {
        *(.eh_frame)
        *(.eh_frame.*)
    }

    /* Normally, the overlap between text and data section is handled by having
     * two different pages for the last bits of text and the first bits of data.
     * That way, if the last bits of text are overwritten, it won't affect the
     * text that is actually used. Unfortunately, for the kernel this is not
     * possible. The whole file is loaded into memory en bloc, so the same page
     * would be mapped twice. Therefore, a write access to the writable page
     * would end up being visible in the non-writable side of things. Therefore,
     * we must actually page-align here.
     */
    . = ALIGN(2M);
    .data : {
        *(.data)
        *(.data.*)
    } :data
    .bss : {
        *(.bss)
        *(COMMON)
        *(.bss.*)
    }
}

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mkdir -p /home/linuxlite/workspace/CCOS-new/sysroot/usr/include
cp -R --preserve=timestamps include/. /home/linuxlite/workspace/CCOS-new/sysroot/usr/include/.
mkdir -p /home/linuxlite/workspace/CCOS-new/sysroot/usr/include
cp -R --preserve=timestamps include/. /home/linuxlite/workspace/CCOS-new/sysroot/usr/include/.
mkdir -p /home/linuxlite/workspace/CCOS-new/sysroot/usr/include
cp -R --preserve=timestamps include/. /home/linuxlite/workspace/CCOS-new/sysroot/usr/include/.
mkdir -p /home/linuxlite/workspace/CCOS-new/sysroot/usr/lib
cp libk.a /home/linuxlite/workspace/CCOS-new/sysroot/usr/lib
mkdir -p /home/linuxlite/workspace/CCOS-new/sysroot/usr/include
cp -R --preserve=timestamps include/. /home/linuxlite/workspace/CCOS-new/sysroot/usr/include/.
x86_64-elf-gcc --sysroot=/home/linuxlite/workspace/CCOS-new/sysroot -isystem=/usr/include -T arch/x86_64/linker.ld -o myos.kernel -O2 -g -Wall -Wextra -ffreestanding    arch/x86_64/crti.o arch/x86_64/crtbegin.o arch/x86_64/tty.o  kernel/kernel.o font/unifont.o  -nostdlib -lk -lgcc  arch/x86_64/crtend.o arch/x86_64/crtn.o 
/home/linuxlite/opt/cross/lib/gcc/x86_64-elf/12.2.0/../../../../x86_64-elf/bin/ld: warning: myos.kernel has a LOAD segment with RWX permissions
`.eh_frame' referenced in section `.text' of arch/x86_64/crtbegin.o: defined in discarded section `.eh_frame' of arch/x86_64/crtbegin.o
`.eh_frame' referenced in section `.text' of arch/x86_64/crtbegin.o: defined in discarded section `.eh_frame' of arch/x86_64/crtbegin.o
arch/x86_64/crtbegin.o: in function `deregister_tm_clones':
crtstuff.c:(.text+0x1): relocation truncated to fit: R_X86_64_32 against symbol `__TMC_END__' defined in .dtors section in myos.kernel
crtstuff.c:(.text+0x18): relocation truncated to fit: R_X86_64_32 against `.tm_clone_table'
arch/x86_64/crtbegin.o: in function `register_tm_clones':
crtstuff.c:(.text+0x31): relocation truncated to fit: R_X86_64_32 against symbol `__TMC_END__' defined in .dtors section in myos.kernel
crtstuff.c:(.text+0x5a): relocation truncated to fit: R_X86_64_32 against `.tm_clone_table'
arch/x86_64/crtbegin.o: in function `__do_global_dtors_aux':
crtstuff.c:(.text+0x88): relocation truncated to fit: R_X86_64_32 against `.dtors'
crtstuff.c:(.text+0x8e): relocation truncated to fit: R_X86_64_32 against symbol `__DTOR_END__' defined in .dtors section in arch/x86_64/crtend.o
arch/x86_64/crtbegin.o: in function `frame_dummy':
crtstuff.c:(.text+0x10c): relocation truncated to fit: R_X86_64_32 against `.bss'
/home/linuxlite/opt/cross/lib/gcc/x86_64-elf/12.2.0/../../../../x86_64-elf/bin/ld: arch/x86_64/tty.o: in function `terminal_initialize':
/home/linuxlite/workspace/CCOS-new/kernel/arch/x86_64/tty.c:14: undefined reference to `_binary_console_sfn_start'
kernel/kernel.o: in function `_start':
/home/linuxlite/workspace/CCOS-new/kernel/kernel/kernel.c:7:(.text+0xc): relocation truncated to fit: R_X86_64_32 against `.rodata.str1.1'
arch/x86_64/crtend.o: in function `__do_global_ctors_aux':
crtstuff.c:(.text+0x13): relocation truncated to fit: R_X86_64_32 against `.ctors'
collect2: error: ld returned 1 exit status
make: *** [Makefile:57: myos.kernel] Error 1

Code: Select all

DEFAULT_HOST!=../default-host.sh
HOST?=DEFAULT_HOST
HOSTARCH!=../target-triplet-to-arch.sh $(HOST)

CFLAGS?=-O2 -g
CPPFLAGS?=
LDFLAGS?=
LIBS?=

DESTDIR?=
PREFIX?=/usr/local
EXEC_PREFIX?=$(PREFIX)
BOOTDIR?=$(EXEC_PREFIX)/boot
INCLUDEDIR?=$(PREFIX)/include

CFLAGS:=$(CFLAGS) -Wall -Wextra -ffreestanding
CPPFLAGS:=$(CPPFLAGS) -D__is_kernel -Iinclude
LDFLAGS:=$(LDFLAGS)
LIBS:=$(LIBS) -nostdlib -lk -lgcc

ARCHDIR=arch/$(HOSTARCH)

include $(ARCHDIR)/make.config

CFLAGS:=$(CFLAGS) $(KERNEL_ARCH_CFLAGS)
CPPFLAGS:=$(CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
LDFLAGS:=$(LDFLAGS) $(KERNEL_ARCH_LDFLAGS)
LIBS:=$(LIBS) $(KERNEL_ARCH_LIBS)

KERNEL_OBJS=\
$(KERNEL_ARCH_OBJS) \
kernel/kernel.o \
font/unifont.o

OBJS=\
$(ARCHDIR)/crti.o \
$(ARCHDIR)/crtbegin.o \
$(KERNEL_OBJS) \
$(ARCHDIR)/crtend.o \
$(ARCHDIR)/crtn.o \

LINK_LIST=\
$(LDFLAGS) \
$(ARCHDIR)/crti.o \
$(ARCHDIR)/crtbegin.o \
$(KERNEL_OBJS) \
$(LIBS) \
$(ARCHDIR)/crtend.o \
$(ARCHDIR)/crtn.o \

.PHONY: all clean install install-headers install-kernel
.SUFFIXES: .o .c .S

all: myos.kernel

myos.kernel: $(OBJS) $(ARCHDIR)/linker.ld
	$(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST)
	x86_64-elf-strip -s -K mmio -K fb -K bootboot -K environment -K initstack myos.kernel

font/unifont.o: 
	x86_64-elf-ld -r -b binary -o font/unifont.o font/unifont.sfn

$(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
	OBJ=`$(CC) $(CFLAGS) $(LDFLAGS) -print-file-name=$(@F)` && cp "$$OBJ" $@

.c.o:
	$(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS)

.S.o:
	$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)

clean:
	rm -f myos.kernel
	rm -f $(OBJS) *.o */*.o */*/*.o
	rm -f $(OBJS:.o=.d) *.d */*.d */*/*.d

install: install-headers install-kernel

install-headers:
	mkdir -p $(DESTDIR)$(INCLUDEDIR)
	cp -R --preserve=timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.

install-kernel: myos.kernel
	mkdir -p $(DESTDIR)$(BOOTDIR)
	cp myos.kernel $(DESTDIR)$(BOOTDIR)

-include $(OBJS:.o=.d)

Code: Select all

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>

#define SSFN_CONSOLEBITMAP_TRUECOLOR        /* use the special renderer for 32 bit truecolor packed pixels */
#include <kernel/ssfn.h>
#include <kernel/tty.h>

extern uint8_t fb;
extern volatile unsigned char _binary_console_sfn_start;

void terminal_initialize(void) {
	ssfn_src = &_binary_console_sfn_start;      /* the bitmap font to use */
	ssfn_dst.ptr = &fb;                  /* framebuffer address and bytes per line */
	ssfn_dst.p = 4096;
	ssfn_dst.fg = 0xFFFFFFFF;                   /* colors, white on black */
	ssfn_dst.bg = 0;
	ssfn_dst.x = 100;                           /* coordinates to draw to */
	ssfn_dst.y = 200;
}

void terminal_putentryat(char *s) {
	if(*s == '\n') {
    		ssfn_dst.y += ssfn_src->height;
    		ssfn_dst.x = 0;
	} else
    		ssfn_putc(*s);
}

void terminal_putchar(char c) {
	terminal_putentryat(c);
}

void terminal_write(const char* data, size_t size) {
	for (size_t i = 0; i < size; i++)
		terminal_putchar(data[i]);
}

void terminal_writestring(const char* data) {
	terminal_write(data, strlen(data));
}