tests: import qemu multiboot test kernel

This is an import from qemu's /tests/multiboot at
a9c837d8ef573604328e4cb61e2e0cab61bba319

tests/data/multiboot/Makefile

@@ -0,0 +1,21 @@
+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 modules.elf
+
+mmap.elf: start.o mmap.o libc.o
+	$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+modules.elf: start.o modules.o libc.o
+	$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
+
+%.o: %.c
+	$(CC) $(CCFLAGS) -c -o $@ $^
+
+%.o: %.S
+	$(CC) $(ASFLAGS) -c -o $@ $^

tests/data/multiboot/libc.c

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2013 Kevin Wolf <[email protected]>
+ *
+ * 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"
+
+void* memcpy(void *dest, const void *src, int n)
+{
+    char *d = dest;
+    const char *s = src;
+
+    while (n--) {
+        *d++ = *s++;
+    }
+
+    return dest;
+}
+
+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/data/multiboot/libc.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2013 Kevin Wolf <[email protected]>
+ *
+ * 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, ...);
+void* memcpy(void *dest, const void *src, int n);
+
+#endif

tests/data/multiboot/link.ld

@@ -0,0 +1,19 @@
+ENTRY(_start)
+
+SECTIONS
+{
+    . = 0x100000;
+    .text : {
+        *(multiboot)
+        *(.text)
+    }
+    .data ALIGN(4096) : {
+        *(.data)
+    }
+    .rodata ALIGN(4096) : {
+        *(.rodata)
+    }
+    .bss ALIGN(4096) : {
+        *(.bss)
+    }
+}

tests/data/multiboot/mmap.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2013 Kevin Wolf <[email protected]>
+ *
+ * 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;
+}