tests: Multiboot mmap test case (d1f3a23b) · Commits · SUMMER2020 / students / proj-2021291

tests/multiboot/Makefile

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		CC=gcc
		CCFLAGS=-m32 -Wall -Wextra -Werror -fno-stack-protector -nostdinc -fno-builtin
		ASFLAGS=-m32

		LD=ld
		LDFLAGS=-melf_i386 -T link.ld
		LIBS=$(shell $(CC) $(CCFLAGS) -print-libgcc-file-name)

		all: mmap.elf

		mmap.elf: start.o mmap.o libc.o
		$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)

		%.o: %.c
		$(CC) $(CCFLAGS) -c -o $@ $^

		%.o: %.S
		$(CC) $(ASFLAGS) -c -o $@ $^

tests/multiboot/libc.c

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		/*
		* Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/

		#include "libc.h"

		static void print_char(char c)
		{
		outb(0xe9, c);
		}

		static void print_str(char *s)
		{
		while (*s) {
		print_char(*s++);
		}
		}

		static void print_num(uint64_t value, int base)
		{
		char digits[] = "0123456789abcdef";
		char buf[32] = { 0 };
		int i = sizeof(buf) - 2;

		do {
		buf[i--] = digits[value % base];
		value /= base;
		} while (value);

		print_str(&buf[i + 1]);
		}

		void printf(const char *fmt, ...)
		{
		va_list ap;
		uint64_t val;
		char *str;
		int base;
		int has_long;
		int alt_form;

		va_start(ap, fmt);

		for (; *fmt; fmt++) {
		if (*fmt != '%') {
		print_char(*fmt);
		continue;
		}
		fmt++;

		if (*fmt == '#') {
		fmt++;
		alt_form = 1;
		} else {
		alt_form = 0;
		}

		if (*fmt == 'l') {
		fmt++;
		if (*fmt == 'l') {
		fmt++;
		has_long = 2;
		} else {
		has_long = 1;
		}
		} else {
		has_long = 0;
		}

		switch (*fmt) {
		case 'x':
		case 'p':
		base = 16;
		goto convert_number;
		case 'd':
		case 'i':
		case 'u':
		base = 10;
		goto convert_number;
		case 'o':
		base = 8;
		goto convert_number;

		convert_number:
		switch (has_long) {
		case 0:
		val = va_arg(ap, unsigned int);
		break;
		case 1:
		val = va_arg(ap, unsigned long);
		break;
		case 2:
		val = va_arg(ap, unsigned long long);
		break;
		}

		if (alt_form && base == 16) {
		print_str("0x");
		}

		print_num(val, base);
		break;

		case 's':
		str = va_arg(ap, char*);
		print_str(str);
		break;
		case '%':
		print_char(*fmt);
		break;
		default:
		print_char('%');
		print_char(*fmt);
		break;
		}
		}

		va_end(ap);
		}

tests/multiboot/libc.h

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Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/

		#ifndef LIBC_H
		#define LIBC_H

		/* Integer types */

		typedef unsigned long long uint64_t;
		typedef unsigned int uint32_t;
		typedef unsigned short uint16_t;
		typedef unsigned char uint8_t;

		typedef signed long long int64_t;
		typedef signed int int32_t;
		typedef signed short int16_t;
		typedef signed char int8_t;

		typedef uint32_t uintptr_t;


		/* stdarg.h */

		typedef __builtin_va_list va_list;
		#define va_start(ap, X) __builtin_va_start(ap, X)
		#define va_arg(ap, type) __builtin_va_arg(ap, type)
		#define va_end(ap) __builtin_va_end(ap)


		/* Port I/O functions */

		static inline void outb(uint16_t port, uint8_t data)
		{
		asm volatile ("outb %0, %1" : : "a" (data), "Nd" (port));
		}


		/* Misc functions */

		void printf(const char *fmt, ...);

		#endif

tests/multiboot/link.ld

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		ENTRY(_start)

		SECTIONS
		{
		. = 0x100000;
		.text : {
		*(multiboot)
		*(.text)
		}
		.data ALIGN(4096) : {
		*(.data)
		}
		.rodata ALIGN(4096) : {
		*(.rodata)
		}
		.bss ALIGN(4096) : {
		*(.bss)
		}
		}

tests/multiboot/mmap.c

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Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
		*
		* Permission is hereby granted, free of charge, to any person obtaining a copy
		* of this software and associated documentation files (the "Software"), to deal
		* in the Software without restriction, including without limitation the rights
		* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
		* copies of the Software, and to permit persons to whom the Software is
		* furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
		* THE SOFTWARE.
		*/

		#include "libc.h"
		#include "multiboot.h"

		int test_main(uint32_t magic, struct mb_info *mbi)
		{
		uintptr_t entry_addr;
		struct mb_mmap_entry *entry;

		(void) magic;

		printf("Lower memory: %dk\n", mbi->mem_lower);
		printf("Upper memory: %dk\n", mbi->mem_upper);

		printf("\ne820 memory map:\n");

		for (entry_addr = mbi->mmap_addr;
		entry_addr < mbi->mmap_addr + mbi->mmap_length;
		entry_addr += entry->size + 4)
		{
		entry = (struct mb_mmap_entry*) entry_addr;

		printf("%#llx - %#llx: type %d [entry size: %d]\n",
		entry->base_addr,
		entry->base_addr + entry->length,
		entry->type,
		entry->size);
		}

		printf("\nmmap start: %#x\n", mbi->mmap_addr);
		printf("mmap end: %#x\n", mbi->mmap_addr + mbi->mmap_length);
		printf("real mmap end: %#x\n", entry_addr);

		return 0;
		}