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-rw-r--r--contrib/syslinux/latest/com32/mboot/map.c353
1 files changed, 0 insertions, 353 deletions
diff --git a/contrib/syslinux/latest/com32/mboot/map.c b/contrib/syslinux/latest/com32/mboot/map.c
deleted file mode 100644
index 0a71d4c..0000000
--- a/contrib/syslinux/latest/com32/mboot/map.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/* ----------------------------------------------------------------------- *
- *
- * Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
- * Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
- *
- * 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.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * map.c
- *
- * Functions that deal with the memory map of various objects
- */
-
-#include "mboot.h"
-
-static struct syslinux_movelist *ml = NULL;
-static struct syslinux_memmap *mmap = NULL, *amap = NULL;
-static addr_t mboot_high_water_mark = 0x100000;
-
-/*
- * Note: although there is no such thing in the spec, at least Xen makes
- * assumptions as to where in the memory space Grub would have loaded
- * certain things. To support that, if "high" is set, then allocate this
- * at an address strictly above any previous allocations.
- *
- * As a precaution, this also pads the data with zero up to the next
- * alignment datum.
- */
-addr_t map_data(const void *data, size_t len, size_t align, int flags)
-{
- addr_t start = (flags & MAP_HIGH) ? mboot_high_water_mark : 0x2000;
- addr_t pad = (flags & MAP_NOPAD) ? 0 : -len & (align - 1);
- addr_t xlen = len + pad;
-
- if (syslinux_memmap_find(amap, SMT_FREE, &start, &xlen, align) ||
- syslinux_add_memmap(&amap, start, len + pad, SMT_ALLOC) ||
- syslinux_add_movelist(&ml, start, (addr_t) data, len) ||
- (pad && syslinux_add_memmap(&mmap, start + len, pad, SMT_ZERO))) {
- printf("Cannot map %zu bytes\n", len + pad);
- return 0;
- }
-
- dprintf("Mapping 0x%08x bytes (%#x pad) at 0x%08x\n", len, pad, start);
-
- if (start + len + pad > mboot_high_water_mark)
- mboot_high_water_mark = start + len + pad;
-
- return start;
-}
-
-addr_t map_string(const char *string)
-{
- if (!string)
- return 0;
- else
- return map_data(string, strlen(string) + 1, 1, 0);
-}
-
-int init_map(void)
-{
- /*
- * Note: mmap is the memory map (containing free and zeroed regions)
- * needed by syslinux_shuffle_boot_pm(); amap is a map where we keep
- * track ourselves which target memory ranges have already been
- * allocated.
- */
- mmap = syslinux_memory_map();
- amap = syslinux_dup_memmap(mmap);
- if (!mmap || !amap) {
- error("Failed to allocate initial memory map!\n");
- return -1;
- }
-#if DEBUG
- dprintf("Initial memory map:\n");
- syslinux_dump_memmap(stdout, mmap);
-#endif
-
- return 0;
-}
-
-struct multiboot_header *map_image(void *ptr, size_t len)
-{
- struct multiboot_header *mbh;
- int mbh_len;
- char *cptr = ptr;
- Elf32_Ehdr *eh = ptr;
- Elf32_Phdr *ph;
- Elf32_Shdr *sh;
- unsigned int i, mbh_offset;
- uint32_t bad_flags;
-
- /*
- * Search for the multiboot header...
- */
- mbh_len = 0;
- for (mbh_offset = 0; mbh_offset < MULTIBOOT_SEARCH; mbh_offset += 4) {
- mbh = (struct multiboot_header *)((char *)ptr + mbh_offset);
- if (mbh->magic != MULTIBOOT_MAGIC)
- continue;
- if (mbh->magic + mbh->flags + mbh->checksum)
- continue;
- if (mbh->flags & MULTIBOOT_VIDEO_MODE)
- mbh_len = 48;
- else if (mbh->flags & MULTIBOOT_AOUT_KLUDGE)
- mbh_len = 32;
- else
- mbh_len = 12;
-
- if (mbh_offset + mbh_len > len)
- mbh_len = 0; /* Invalid... */
- else
- break; /* Found something... */
- }
-
- if (mbh_len) {
- bad_flags = mbh->flags & MULTIBOOT_UNSUPPORTED;
- if (bad_flags) {
- printf("Unsupported Multiboot flags set: %#x\n", bad_flags);
- return NULL;
- }
- }
-
- if (len < sizeof(Elf32_Ehdr) ||
- memcmp(eh->e_ident, "\x7f" "ELF\1\1\1", 6) ||
- (eh->e_machine != EM_386 && eh->e_machine != EM_486 &&
- eh->e_machine != EM_X86_64) ||
- eh->e_version != EV_CURRENT ||
- eh->e_ehsize < sizeof(Elf32_Ehdr) || eh->e_ehsize >= len ||
- eh->e_phentsize < sizeof(Elf32_Phdr) ||
- !eh->e_phnum || eh->e_phoff + eh->e_phentsize * eh->e_phnum > len)
- eh = NULL; /* No valid ELF header found */
-
- /* Is this a Solaris kernel? */
- if (!set.solaris && eh && kernel_is_solaris(eh))
- opt.solaris = true;
-
- /*
- * Note: the Multiboot Specification implies that AOUT_KLUDGE should
- * have precedence over the ELF header. However, Grub disagrees, and
- * Grub is "the reference bootloader" for the Multiboot Specification.
- * This is insane, since it makes the AOUT_KLUDGE bit functionally
- * useless, but at least Solaris apparently depends on this behavior.
- */
- if (eh && !(opt.aout && mbh_len && (mbh->flags & MULTIBOOT_AOUT_KLUDGE))) {
- regs.eip = eh->e_entry; /* Can be overridden further down... */
-
- ph = (Elf32_Phdr *) (cptr + eh->e_phoff);
-
- for (i = 0; i < eh->e_phnum; i++) {
- if (ph->p_type == PT_LOAD || ph->p_type == PT_PHDR) {
- /*
- * This loads at p_paddr, which matches Grub. However, if
- * e_entry falls within the p_vaddr range of this PHDR, then
- * adjust it to match the p_paddr range... this is how Grub
- * behaves, so it's by definition correct (it doesn't have to
- * make sense...)
- */
- addr_t addr = ph->p_paddr;
- addr_t msize = ph->p_memsz;
- addr_t dsize = min(msize, ph->p_filesz);
-
- if (eh->e_entry >= ph->p_vaddr
- && eh->e_entry < ph->p_vaddr + msize)
- regs.eip = eh->e_entry + (ph->p_paddr - ph->p_vaddr);
-
- dprintf("Segment at 0x%08x data 0x%08x len 0x%08x\n",
- addr, dsize, msize);
-
- if (syslinux_memmap_type(amap, addr, msize) != SMT_FREE) {
- printf
- ("Memory segment at 0x%08x (len 0x%08x) is unavailable\n",
- addr, msize);
- return NULL; /* Memory region unavailable */
- }
-
- /* Mark this region as allocated in the available map */
- if (syslinux_add_memmap(&amap, addr, msize, SMT_ALLOC)) {
- error("Overlapping segments found in ELF header\n");
- return NULL;
- }
-
- if (ph->p_filesz) {
- /* Data present region. Create a move entry for it. */
- if (syslinux_add_movelist
- (&ml, addr, (addr_t) cptr + ph->p_offset, dsize)) {
- error("Failed to map PHDR data\n");
- return NULL;
- }
- }
- if (msize > dsize) {
- /* Zero-filled region. Mark as a zero region in the memory map. */
- if (syslinux_add_memmap
- (&mmap, addr + dsize, msize - dsize, SMT_ZERO)) {
- error("Failed to map PHDR zero region\n");
- return NULL;
- }
- }
- if (addr + msize > mboot_high_water_mark)
- mboot_high_water_mark = addr + msize;
- } else {
- /* Ignore this program header */
- }
-
- ph = (Elf32_Phdr *) ((char *)ph + eh->e_phentsize);
- }
-
- /* Load the ELF symbol table */
- if (eh->e_shoff) {
- addr_t addr, len;
-
- sh = (Elf32_Shdr *) ((char *)eh + eh->e_shoff);
-
- len = eh->e_shentsize * eh->e_shnum;
- /*
- * Align this, but don't pad -- in general this means a bunch of
- * smaller sections gets packed into a single page.
- */
- addr = map_data(sh, len, 4096, MAP_HIGH | MAP_NOPAD);
- if (!addr) {
- error("Failed to map symbol table\n");
- return NULL;
- }
-
- mbinfo.flags |= MB_INFO_ELF_SHDR;
- mbinfo.syms.e.addr = addr;
- mbinfo.syms.e.num = eh->e_shnum;
- mbinfo.syms.e.size = eh->e_shentsize;
- mbinfo.syms.e.shndx = eh->e_shstrndx;
-
- for (i = 0; i < eh->e_shnum; i++) {
- addr_t align;
-
- if (!sh[i].sh_size)
- continue; /* Empty section */
- if (sh[i].sh_flags & SHF_ALLOC)
- continue; /* SHF_ALLOC sections should have PHDRs */
-
- align = sh[i].sh_addralign ? sh[i].sh_addralign : 0;
- addr = map_data((char *)ptr + sh[i].sh_offset, sh[i].sh_size,
- align, MAP_HIGH);
- if (!addr) {
- error("Failed to map symbol section\n");
- return NULL;
- }
- sh[i].sh_addr = addr;
- }
- }
- } else if (mbh_len && (mbh->flags & MULTIBOOT_AOUT_KLUDGE)) {
- /*
- * a.out kludge thing...
- */
- char *data_ptr;
- addr_t data_len, bss_len;
- addr_t bss_addr;
-
- regs.eip = mbh->entry_addr;
-
- data_ptr = (char *)mbh - (mbh->header_addr - mbh->load_addr);
-
- if (mbh->load_end_addr)
- data_len = mbh->load_end_addr - mbh->load_addr;
- else
- data_len = len - mbh_offset + (mbh->header_addr - mbh->load_addr);
-
- bss_addr = mbh->load_addr + data_len;
-
- if (mbh->bss_end_addr)
- bss_len = mbh->bss_end_addr - mbh->load_end_addr;
- else
- bss_len = 0;
-
- if (syslinux_memmap_type(amap, mbh->load_addr, data_len + bss_len)
- != SMT_FREE) {
- printf("Memory segment at 0x%08x (len 0x%08x) is unavailable\n",
- mbh->load_addr, data_len + bss_len);
- return NULL; /* Memory region unavailable */
- }
- if (syslinux_add_memmap(&amap, mbh->load_addr,
- data_len + bss_len, SMT_ALLOC)) {
- error("Failed to claim a.out address space!\n");
- return NULL;
- }
- if (data_len)
- if (syslinux_add_movelist(&ml, mbh->load_addr, (addr_t) data_ptr,
- data_len)) {
- error("Failed to map a.out data\n");
- return NULL;
- }
- if (bss_len)
- if (syslinux_add_memmap
- (&mmap, bss_addr, bss_len, SMT_ZERO)) {
- error("Failed to map a.out bss\n");
- return NULL;
- }
- if (bss_addr + bss_len > mboot_high_water_mark)
- mboot_high_water_mark = bss_addr + bss_len;
- } else {
- error
- ("Invalid Multiboot image: neither ELF header nor a.out kludge found\n");
- return NULL;
- }
-
- return mbh;
-}
-
-/*
- * Set up a stack. This isn't actually required by the spec, but it seems
- * like a prudent thing to do. Also, put enough zeros at the top of the
- * stack that something that looks for an ELF invocation record will know
- * there isn't one.
- */
-static void mboot_map_stack(void)
-{
- addr_t start, len;
-
- if (syslinux_memmap_largest(amap, SMT_FREE, &start, &len) || len < 64)
- return; /* Not much we can do, here... */
-
- regs.esp = (start + len - 32) & ~15;
- dprintf("Mapping stack at 0x%08x\n", regs.esp);
- syslinux_add_memmap(&mmap, regs.esp, 32, SMT_ZERO);
-}
-
-void mboot_run(int bootflags)
-{
- mboot_map_stack();
-
- dprintf("Running, eip = 0x%08x, ebx = 0x%08x\n", regs.eip, regs.ebx);
-
- regs.eax = MULTIBOOT_VALID;
- syslinux_shuffle_boot_pm(ml, mmap, bootflags, &regs);
-}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-08 14:38:19 +0200