bedohswe/bootsector_c
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An update.

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bʰedoh₂ swé 2024-10-20 16:53:40 +05:00
parent e4294e3454
commit 945c04770d
4 changed files with 2053 additions and 6 deletions
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6
Makefile
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@ -1,12 +1,14 @@
SRCS = boot.c SRCS = boot.c
LDFLAGS = -flto -T linker.ld -nostdlib LDFLAGS = -flto -T linker.ld -nostdlib -Os
CFLAGS = -flto -ffreestanding -fno-builtin -fno-pie -Wall -std=c2x -m16 -nostdlib -Os -nostartfiles -r CFLAGS = -flto -ffreestanding -fno-builtin -fno-pie -Wall -std=c2x -m16 -nostdlib -Os -nostartfiles -r
%.o: %.c %.o: %.c
$(CC) $^ -o $@ $(CFLAGS) $(CC) $^ -o $@ $(CFLAGS)
all: $(SRCS:.c=.o) bin: $(SRCS:.c=.o)
$(CC) $(LDFLAGS) -o bin $^ $(CC) $(LDFLAGS) -o bin $^
all: bin
clean: clean:
$(RM) $(SRCS:.c=.o) bin $(RM) $(SRCS:.c=.o) bin

10
boot.c
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@ -1,5 +1,7 @@
static void putchar(char); #include "hedley.h"
static void write(char*);
HEDLEY_ALWAYS_INLINE void putchar(char);
HEDLEY_ALWAYS_INLINE void write(char*);
void _start(void) { void _start(void) {
write("Hello World!\r\n\0"); write("Hello World!\r\n\0");
@ -7,12 +9,12 @@ void _start(void) {
; ;
} }
static void write(char *out) { HEDLEY_ALWAYS_INLINE void write(char *out) {
for (char *i = out; *i != 0; i++) for (char *i = out; *i != 0; i++)
putchar(*i); putchar(*i);
} }
static void putchar(char out) { HEDLEY_ALWAYS_INLINE void putchar(char out) {
__asm__ volatile ( __asm__ volatile (
"movb $0x0e, %%ah;" "movb $0x0e, %%ah;"
"movb %0, %%al;" "movb %0, %%al;"

2042
hedley.h Normal file
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File diff suppressed because it is too large Load Diff

1
linker.ld
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@ -23,5 +23,6 @@ SECTIONS
/DISCARD/ : { *(.eh_frame) /DISCARD/ : { *(.eh_frame)
*(.comment) *(.comment)
*(.note.GNU-stack) *(.note.GNU-stack)
*(.note.gnu.build-id)
} }
} }