Adding upstream version 1:7.2+dfsg.upstream/1%7.2+dfsgupstream

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 414 insertions, 0 deletions

diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
new file mode 100644
index 00000000..963e2936
--- /dev/null
+++ b/hw/i386/multiboot.c
@@ -0,0 +1,414 @@
+/*
+ * QEMU PC System Emulator
+ *
+ * Copyright (c) 2003-2004 Fabrice Bellard
+ *
+ * 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 "qemu/osdep.h"
+#include "qemu/option.h"
+#include "cpu.h"
+#include "hw/nvram/fw_cfg.h"
+#include "multiboot.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+
+/* Show multiboot debug output */
+//#define DEBUG_MULTIBOOT
+
+#ifdef DEBUG_MULTIBOOT
+#define mb_debug(a...) error_report(a)
+#else
+#define mb_debug(a...)
+#endif
+
+#define MULTIBOOT_STRUCT_ADDR 0x9000
+
+#if MULTIBOOT_STRUCT_ADDR > 0xf0000
+#error multiboot struct needs to fit in 16 bit real mode
+#endif
+
+enum {
+    /* Multiboot info */
+    MBI_FLAGS       = 0,
+    MBI_MEM_LOWER   = 4,
+    MBI_MEM_UPPER   = 8,
+    MBI_BOOT_DEVICE = 12,
+    MBI_CMDLINE     = 16,
+    MBI_MODS_COUNT  = 20,
+    MBI_MODS_ADDR   = 24,
+    MBI_MMAP_ADDR   = 48,
+    MBI_BOOTLOADER  = 64,
+
+    MBI_SIZE        = 88,
+
+    /* Multiboot modules */
+    MB_MOD_START    = 0,
+    MB_MOD_END      = 4,
+    MB_MOD_CMDLINE  = 8,
+
+    MB_MOD_SIZE     = 16,
+
+    /* Region offsets */
+    ADDR_E820_MAP = MULTIBOOT_STRUCT_ADDR + 0,
+    ADDR_MBI      = ADDR_E820_MAP + 0x500,
+
+    /* Multiboot flags */
+    MULTIBOOT_FLAGS_MEMORY      = 1 << 0,
+    MULTIBOOT_FLAGS_BOOT_DEVICE = 1 << 1,
+    MULTIBOOT_FLAGS_CMDLINE     = 1 << 2,
+    MULTIBOOT_FLAGS_MODULES     = 1 << 3,
+    MULTIBOOT_FLAGS_MMAP        = 1 << 6,
+    MULTIBOOT_FLAGS_BOOTLOADER  = 1 << 9,
+};
+
+typedef struct {
+    /* buffer holding kernel, cmdlines and mb_infos */
+    void *mb_buf;
+    /* address in target */
+    hwaddr mb_buf_phys;
+    /* size of mb_buf in bytes */
+    unsigned mb_buf_size;
+    /* offset of mb-info's in bytes */
+    hwaddr offset_mbinfo;
+    /* offset in buffer for cmdlines in bytes */
+    hwaddr offset_cmdlines;
+    /* offset in buffer for bootloader name in bytes */
+    hwaddr offset_bootloader;
+    /* offset of modules in bytes */
+    hwaddr offset_mods;
+    /* available slots for mb modules infos */
+    int mb_mods_avail;
+    /* currently used slots of mb modules */
+    int mb_mods_count;
+} MultibootState;
+
+const char *bootloader_name = "qemu";
+
+static uint32_t mb_add_cmdline(MultibootState *s, const char *cmdline)
+{
+    hwaddr p = s->offset_cmdlines;
+    char *b = (char *)s->mb_buf + p;
+
+    memcpy(b, cmdline, strlen(cmdline) + 1);
+    s->offset_cmdlines += strlen(b) + 1;
+    return s->mb_buf_phys + p;
+}
+
+static uint32_t mb_add_bootloader(MultibootState *s, const char *bootloader)
+{
+    hwaddr p = s->offset_bootloader;
+    char *b = (char *)s->mb_buf + p;
+
+    memcpy(b, bootloader, strlen(bootloader) + 1);
+    s->offset_bootloader += strlen(b) + 1;
+    return s->mb_buf_phys + p;
+}
+
+static void mb_add_mod(MultibootState *s,
+                       hwaddr start, hwaddr end,
+                       hwaddr cmdline_phys)
+{
+    char *p;
+    assert(s->mb_mods_count < s->mb_mods_avail);
+
+    p = (char *)s->mb_buf + s->offset_mbinfo + MB_MOD_SIZE * s->mb_mods_count;
+
+    stl_p(p + MB_MOD_START,   start);
+    stl_p(p + MB_MOD_END,     end);
+    stl_p(p + MB_MOD_CMDLINE, cmdline_phys);
+
+    mb_debug("mod%02d: "TARGET_FMT_plx" - "TARGET_FMT_plx,
+             s->mb_mods_count, start, end);
+
+    s->mb_mods_count++;
+}
+
+int load_multiboot(X86MachineState *x86ms,
+                   FWCfgState *fw_cfg,
+                   FILE *f,
+                   const char *kernel_filename,
+                   const char *initrd_filename,
+                   const char *kernel_cmdline,
+                   int kernel_file_size,
+                   uint8_t *header)
+{
+    bool multiboot_dma_enabled = X86_MACHINE_GET_CLASS(x86ms)->fwcfg_dma_enabled;
+    int i, is_multiboot = 0;
+    uint32_t flags = 0;
+    uint32_t mh_entry_addr;
+    uint32_t mh_load_addr;
+    uint32_t mb_kernel_size;
+    MultibootState mbs;
+    uint8_t bootinfo[MBI_SIZE];
+    uint8_t *mb_bootinfo_data;
+    uint32_t cmdline_len;
+    GList *mods = NULL;
+    g_autofree char *kcmdline = NULL;
+
+    /* Ok, let's see if it is a multiboot image.
+       The header is 12x32bit long, so the latest entry may be 8192 - 48. */
+    for (i = 0; i < (8192 - 48); i += 4) {
+        if (ldl_p(header+i) == 0x1BADB002) {
+            uint32_t checksum = ldl_p(header+i+8);
+            flags = ldl_p(header+i+4);
+            checksum += flags;
+            checksum += (uint32_t)0x1BADB002;
+            if (!checksum) {
+                is_multiboot = 1;
+                break;
+            }
+        }
+    }
+
+    if (!is_multiboot)
+        return 0; /* no multiboot */
+
+    mb_debug("I believe we found a multiboot image!");
+    memset(bootinfo, 0, sizeof(bootinfo));
+    memset(&mbs, 0, sizeof(mbs));
+
+    if (flags & 0x00000004) { /* MULTIBOOT_HEADER_HAS_VBE */
+        error_report("multiboot knows VBE. we don't");
+    }
+    if (!(flags & 0x00010000)) { /* MULTIBOOT_HEADER_HAS_ADDR */
+        uint64_t elf_entry;
+        uint64_t elf_low, elf_high;
+        int kernel_size;
+        fclose(f);
+
+        if (((struct elf64_hdr*)header)->e_machine == EM_X86_64) {
+            error_report("Cannot load x86-64 image, give a 32bit one.");
+            exit(1);
+        }
+
+        kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
+                               &elf_low, &elf_high, NULL, 0, I386_ELF_MACHINE,
+                               0, 0);
+        if (kernel_size < 0) {
+            error_report("Error while loading elf kernel");
+            exit(1);
+        }
+        mh_load_addr = elf_low;
+        mb_kernel_size = elf_high - elf_low;
+        mh_entry_addr = elf_entry;
+
+        mbs.mb_buf = g_malloc(mb_kernel_size);
+        if (rom_copy(mbs.mb_buf, mh_load_addr, mb_kernel_size) != mb_kernel_size) {
+            error_report("Error while fetching elf kernel from rom");
+            exit(1);
+        }
+
+        mb_debug("loading multiboot-elf kernel "
+                 "(%#x bytes) with entry %#zx",
+                 mb_kernel_size, (size_t)mh_entry_addr);
+    } else {
+        /* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_ADDR. */
+        uint32_t mh_header_addr = ldl_p(header+i+12);
+        uint32_t mh_load_end_addr = ldl_p(header+i+20);
+        uint32_t mh_bss_end_addr = ldl_p(header+i+24);
+
+        mh_load_addr = ldl_p(header+i+16);
+        if (mh_header_addr < mh_load_addr) {
+            error_report("invalid load_addr address");
+            exit(1);
+        }
+        if (mh_header_addr - mh_load_addr > i) {
+            error_report("invalid header_addr address");
+            exit(1);
+        }
+
+        uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
+        uint32_t mb_load_size = 0;
+        mh_entry_addr = ldl_p(header+i+28);
+
+        if (mh_load_end_addr) {
+            if (mh_load_end_addr < mh_load_addr) {
+                error_report("invalid load_end_addr address");
+                exit(1);
+            }
+            mb_load_size = mh_load_end_addr - mh_load_addr;
+        } else {
+            if (kernel_file_size < mb_kernel_text_offset) {
+                error_report("invalid kernel_file_size");
+                exit(1);
+            }
+            mb_load_size = kernel_file_size - mb_kernel_text_offset;
+        }
+        if (mb_load_size > UINT32_MAX - mh_load_addr) {
+            error_report("kernel does not fit in address space");
+            exit(1);
+        }
+        if (mh_bss_end_addr) {
+            if (mh_bss_end_addr < (mh_load_addr + mb_load_size)) {
+                error_report("invalid bss_end_addr address");
+                exit(1);
+            }
+            mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+        } else {
+            mb_kernel_size = mb_load_size;
+        }
+
+        mb_debug("multiboot: header_addr = %#x", mh_header_addr);
+        mb_debug("multiboot: load_addr = %#x", mh_load_addr);
+        mb_debug("multiboot: load_end_addr = %#x", mh_load_end_addr);
+        mb_debug("multiboot: bss_end_addr = %#x", mh_bss_end_addr);
+        mb_debug("loading multiboot kernel (%#x bytes) at %#x",
+                 mb_load_size, mh_load_addr);
+
+        mbs.mb_buf = g_malloc(mb_kernel_size);
+        fseek(f, mb_kernel_text_offset, SEEK_SET);
+        if (fread(mbs.mb_buf, 1, mb_load_size, f) != mb_load_size) {
+            error_report("fread() failed");
+            exit(1);
+        }
+        memset(mbs.mb_buf + mb_load_size, 0, mb_kernel_size - mb_load_size);
+        fclose(f);
+    }
+
+    mbs.mb_buf_phys = mh_load_addr;
+
+    mbs.mb_buf_size = TARGET_PAGE_ALIGN(mb_kernel_size);
+    mbs.offset_mbinfo = mbs.mb_buf_size;
+
+    /* Calculate space for cmdlines, bootloader name, and mb_mods */
+    cmdline_len = strlen(kernel_filename) + 1;
+    cmdline_len += strlen(kernel_cmdline) + 1;
+    if (initrd_filename) {
+        const char *r = initrd_filename;
+        cmdline_len += strlen(initrd_filename) + 1;
+        while (*r) {
+            char *value;
+            r = get_opt_value(r, &value);
+            mbs.mb_mods_avail++;
+            mods = g_list_append(mods, value);
+            if (*r) {
+                r++;
+            }
+        }
+    }
+
+    mbs.mb_buf_size += cmdline_len;
+    mbs.mb_buf_size += MB_MOD_SIZE * mbs.mb_mods_avail;
+    mbs.mb_buf_size += strlen(bootloader_name) + 1;
+
+    mbs.mb_buf_size = TARGET_PAGE_ALIGN(mbs.mb_buf_size);
+
+    /* enlarge mb_buf to hold cmdlines, bootloader, mb-info structs */
+    mbs.mb_buf            = g_realloc(mbs.mb_buf, mbs.mb_buf_size);
+    mbs.offset_cmdlines   = mbs.offset_mbinfo + mbs.mb_mods_avail * MB_MOD_SIZE;
+    mbs.offset_bootloader = mbs.offset_cmdlines + cmdline_len;
+
+    if (mods) {
+        GList *tmpl = mods;
+        mbs.offset_mods = mbs.mb_buf_size;
+
+        while (tmpl) {
+            char *next_space;
+            int mb_mod_length;
+            uint32_t offs = mbs.mb_buf_size;
+            char *one_file = tmpl->data;
+
+            /* if a space comes after the module filename, treat everything
+               after that as parameters */
+            hwaddr c = mb_add_cmdline(&mbs, one_file);
+            next_space = strchr(one_file, ' ');
+            if (next_space) {
+                *next_space = '\0';
+            }
+            mb_debug("multiboot loading module: %s", one_file);
+            mb_mod_length = get_image_size(one_file);
+            if (mb_mod_length < 0) {
+                error_report("Failed to open file '%s'", one_file);
+                exit(1);
+            }
+
+            mbs.mb_buf_size = TARGET_PAGE_ALIGN(mb_mod_length + mbs.mb_buf_size);
+            mbs.mb_buf = g_realloc(mbs.mb_buf, mbs.mb_buf_size);
+
+            if (load_image_size(one_file, (unsigned char *)mbs.mb_buf + offs,
+                                mbs.mb_buf_size - offs) < 0) {
+                error_report("Error loading file '%s'", one_file);
+                exit(1);
+            }
+            mb_add_mod(&mbs, mbs.mb_buf_phys + offs,
+                       mbs.mb_buf_phys + offs + mb_mod_length, c);
+
+            mb_debug("mod_start: %p\nmod_end:   %p\n  cmdline: "TARGET_FMT_plx,
+                     (char *)mbs.mb_buf + offs,
+                     (char *)mbs.mb_buf + offs + mb_mod_length, c);
+            g_free(one_file);
+            tmpl = tmpl->next;
+        }
+        g_list_free(mods);
+    }
+
+    /* Commandline support */
+    kcmdline = g_strdup_printf("%s %s", kernel_filename, kernel_cmdline);
+    stl_p(bootinfo + MBI_CMDLINE, mb_add_cmdline(&mbs, kcmdline));
+
+    stl_p(bootinfo + MBI_BOOTLOADER, mb_add_bootloader(&mbs, bootloader_name));
+
+    stl_p(bootinfo + MBI_MODS_ADDR,  mbs.mb_buf_phys + mbs.offset_mbinfo);
+    stl_p(bootinfo + MBI_MODS_COUNT, mbs.mb_mods_count); /* mods_count */
+
+    /* the kernel is where we want it to be now */
+    stl_p(bootinfo + MBI_FLAGS, MULTIBOOT_FLAGS_MEMORY
+                                | MULTIBOOT_FLAGS_BOOT_DEVICE
+                                | MULTIBOOT_FLAGS_CMDLINE
+                                | MULTIBOOT_FLAGS_MODULES
+                                | MULTIBOOT_FLAGS_MMAP
+                                | MULTIBOOT_FLAGS_BOOTLOADER);
+    stl_p(bootinfo + MBI_BOOT_DEVICE, 0x8000ffff); /* XXX: use the -boot switch? */
+    stl_p(bootinfo + MBI_MMAP_ADDR,   ADDR_E820_MAP);
+
+    mb_debug("multiboot: entry_addr = %#x", mh_entry_addr);
+    mb_debug("           mb_buf_phys   = "TARGET_FMT_plx, mbs.mb_buf_phys);
+    mb_debug("           mod_start     = "TARGET_FMT_plx,
+             mbs.mb_buf_phys + mbs.offset_mods);
+    mb_debug("           mb_mods_count = %d", mbs.mb_mods_count);
+
+    /* save bootinfo off the stack */
+    mb_bootinfo_data = g_memdup(bootinfo, sizeof(bootinfo));
+
+    /* Pass variables to option rom */
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ENTRY, mh_entry_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, mh_load_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, mbs.mb_buf_size);
+    fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA,
+                     mbs.mb_buf, mbs.mb_buf_size);
+
+    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_ADDR, ADDR_MBI);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, sizeof(bootinfo));
+    fw_cfg_add_bytes(fw_cfg, FW_CFG_INITRD_DATA, mb_bootinfo_data,
+                     sizeof(bootinfo));
+
+    if (multiboot_dma_enabled) {
+        option_rom[nb_option_roms].name = "multiboot_dma.bin";
+    } else {
+        option_rom[nb_option_roms].name = "multiboot.bin";
+    }
+    option_rom[nb_option_roms].bootindex = 0;
+    nb_option_roms++;
+
+    return 1; /* yes, we are multiboot */
+}