Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/grub-core/lib/i386/relocator.c b/grub-core/lib/i386/relocator.c
new file mode 100644
index 0000000..34cbe83
--- /dev/null
+++ b/grub-core/lib/i386/relocator.c
@@ -0,0 +1,210 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/mm.h>
+#include <grub/misc.h>
+
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/term.h>
+
+#include <grub/i386/relocator.h>
+#include <grub/relocator_private.h>
+#include <grub/i386/relocator_private.h>
+#include <grub/i386/pc/int.h>
+
+extern grub_uint8_t grub_relocator16_start;
+extern grub_uint8_t grub_relocator16_end;
+extern grub_uint16_t grub_relocator16_cs;
+extern grub_uint16_t grub_relocator16_ip;
+extern grub_uint16_t grub_relocator16_ds;
+extern grub_uint16_t grub_relocator16_es;
+extern grub_uint16_t grub_relocator16_fs;
+extern grub_uint16_t grub_relocator16_gs;
+extern grub_uint16_t grub_relocator16_ss;
+extern grub_uint16_t grub_relocator16_sp;
+extern grub_uint32_t grub_relocator16_edx;
+extern grub_uint32_t grub_relocator16_ebx;
+extern grub_uint32_t grub_relocator16_esi;
+extern grub_uint32_t grub_relocator16_ebp;
+
+extern grub_uint16_t grub_relocator16_keep_a20_enabled;
+
+extern grub_uint8_t grub_relocator32_start;
+extern grub_uint8_t grub_relocator32_end;
+extern grub_uint32_t grub_relocator32_eax;
+extern grub_uint32_t grub_relocator32_ebx;
+extern grub_uint32_t grub_relocator32_ecx;
+extern grub_uint32_t grub_relocator32_edx;
+extern grub_uint32_t grub_relocator32_eip;
+extern grub_uint32_t grub_relocator32_esp;
+extern grub_uint32_t grub_relocator32_ebp;
+extern grub_uint32_t grub_relocator32_esi;
+extern grub_uint32_t grub_relocator32_edi;
+
+extern grub_uint8_t grub_relocator64_start;
+extern grub_uint8_t grub_relocator64_end;
+extern grub_uint64_t grub_relocator64_rax;
+extern grub_uint64_t grub_relocator64_rbx;
+extern grub_uint64_t grub_relocator64_rcx;
+extern grub_uint64_t grub_relocator64_rdx;
+extern grub_uint64_t grub_relocator64_rip;
+extern grub_uint64_t grub_relocator64_rsp;
+extern grub_uint64_t grub_relocator64_rsi;
+extern grub_addr_t grub_relocator64_cr3;
+extern struct grub_i386_idt grub_relocator16_idt;
+
+#define RELOCATOR_SIZEOF(x)	(&grub_relocator##x##_end - &grub_relocator##x##_start)
+
+grub_err_t
+grub_relocator32_boot (struct grub_relocator *rel,
+		       struct grub_relocator32_state state,
+		       int avoid_efi_bootservices)
+{
+  grub_err_t err;
+  void *relst;
+  grub_relocator_chunk_t ch;
+
+  /* Specific memory range due to Global Descriptor Table for use by payload
+     that we will store in returned chunk.  The address range and preference
+     are based on "THE LINUX/x86 BOOT PROTOCOL" specification.  */
+  err = grub_relocator_alloc_chunk_align_safe (rel, &ch, 0x1000, 0x9a000,
+					       RELOCATOR_SIZEOF (32), 16,
+					       GRUB_RELOCATOR_PREFERENCE_LOW,
+					       avoid_efi_bootservices);
+  if (err)
+    return err;
+
+  grub_relocator32_eax = state.eax;
+  grub_relocator32_ebx = state.ebx;
+  grub_relocator32_ecx = state.ecx;
+  grub_relocator32_edx = state.edx;
+  grub_relocator32_eip = state.eip;
+  grub_relocator32_esp = state.esp;
+  grub_relocator32_ebp = state.ebp;
+  grub_relocator32_esi = state.esi;
+  grub_relocator32_edi = state.edi;
+
+  grub_memmove (get_virtual_current_address (ch), &grub_relocator32_start,
+		RELOCATOR_SIZEOF (32));
+
+  err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
+				       &relst, NULL);
+  if (err)
+    return err;
+
+  asm volatile ("cli");
+  ((void (*) (void)) relst) ();
+
+  /* Not reached.  */
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_relocator16_boot (struct grub_relocator *rel,
+		       struct grub_relocator16_state state)
+{
+  grub_err_t err;
+  void *relst;
+  grub_relocator_chunk_t ch;
+
+  /* Put it higher than the byte it checks for A20 check.  */
+  err = grub_relocator_alloc_chunk_align_safe (rel, &ch, 0x8010, 0xa0000,
+					       RELOCATOR_SIZEOF (16) +
+					       GRUB_RELOCATOR16_STACK_SIZE, 16,
+					       GRUB_RELOCATOR_PREFERENCE_NONE, 0);
+  if (err)
+    return err;
+
+  grub_relocator16_cs = state.cs;  
+  grub_relocator16_ip = state.ip;
+
+  grub_relocator16_ds = state.ds;
+  grub_relocator16_es = state.es;
+  grub_relocator16_fs = state.fs;
+  grub_relocator16_gs = state.gs;
+
+  grub_relocator16_ss = state.ss;
+  grub_relocator16_sp = state.sp;
+
+  grub_relocator16_ebp = state.ebp;
+  grub_relocator16_ebx = state.ebx;
+  grub_relocator16_edx = state.edx;
+  grub_relocator16_esi = state.esi;
+#ifdef GRUB_MACHINE_PCBIOS
+  grub_relocator16_idt = *grub_realidt;
+#else
+  grub_relocator16_idt.base = 0;
+  grub_relocator16_idt.limit = 0;
+#endif
+
+  grub_relocator16_keep_a20_enabled = state.a20;
+
+  grub_memmove (get_virtual_current_address (ch), &grub_relocator16_start,
+		RELOCATOR_SIZEOF (16));
+
+  err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
+				       &relst, NULL);
+  if (err)
+    return err;
+
+  asm volatile ("cli");
+  ((void (*) (void)) relst) ();
+
+  /* Not reached.  */
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_relocator64_boot (struct grub_relocator *rel,
+		       struct grub_relocator64_state state,
+		       grub_addr_t min_addr, grub_addr_t max_addr)
+{
+  grub_err_t err;
+  void *relst;
+  grub_relocator_chunk_t ch;
+
+  err = grub_relocator_alloc_chunk_align_safe (rel, &ch, min_addr, max_addr,
+					       RELOCATOR_SIZEOF (64), 16,
+					       GRUB_RELOCATOR_PREFERENCE_NONE, 0);
+  if (err)
+    return err;
+
+  grub_relocator64_rax = state.rax;
+  grub_relocator64_rbx = state.rbx;
+  grub_relocator64_rcx = state.rcx;
+  grub_relocator64_rdx = state.rdx;
+  grub_relocator64_rip = state.rip;
+  grub_relocator64_rsp = state.rsp;
+  grub_relocator64_rsi = state.rsi;
+  grub_relocator64_cr3 = state.cr3;
+
+  grub_memmove (get_virtual_current_address (ch), &grub_relocator64_start,
+		RELOCATOR_SIZEOF (64));
+
+  err = grub_relocator_prepare_relocs (rel, get_physical_target_address (ch),
+				       &relst, NULL);
+  if (err)
+    return err;
+
+  asm volatile ("cli");
+  ((void (*) (void)) relst) ();
+
+  /* Not reached.  */
+  return GRUB_ERR_NONE;
+}