DynamicTablesPkg: FdtHwInfoParser: Add PCI config parser

[mirror_edk2.git] / OvmfPkg / OvmfXenElfHeaderGenerator.c

/** @file\r
  This program generates a hex array to be manually coppied into\r
  OvmfXen.fdf.\r
\r
  The purpose is for the flash device image to be recognize as an ELF.\r
\r
  Copyright (c) 2019, Citrix Systems, Inc.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include "elf.h"\r
#include "stdio.h"\r
#include "stddef.h"\r
\r
void\r
print_hdr (\r
  void    *s,\r
  size_t  size\r
  )\r
{\r
  char  *c = s;\r
\r
  while (size--) {\r
    printf ("0x%02hhx, ", *(c++));\r
  }\r
}\r
\r
/* Format for the XEN_ELFNOTE_PHYS32_ENTRY program segment */\r
#define XEN_ELFNOTE_PHYS32_ENTRY  18\r
typedef struct {\r
  uint32_t    name_size;\r
  uint32_t    desc_size;\r
  uint32_t    type;\r
  char        name[4];\r
  uint32_t    desc;\r
} xen_elfnote_phys32_entry;\r
\r
int\r
main (\r
  void\r
  )\r
{\r
  /* FW_SIZE */\r
  size_t  ovmf_blob_size = 0x00200000;\r
  /* Load OVMF at 1MB when running as PVH guest */\r
  uint32_t  ovmf_base_address = 0x00100000;\r
  /* Xen PVH entry point */\r
  uint32_t  ovmfxen_pvh_entry_point = ovmf_base_address + ovmf_blob_size - 0x30;\r
  size_t    offset_into_file        = 0;\r
\r
  /* ELF file header */\r
  Elf32_Ehdr  hdr = {\r
    .e_ident     = ELFMAG,\r
    .e_type      = ET_EXEC,\r
    .e_machine   = EM_386,\r
    .e_version   = EV_CURRENT,\r
    .e_entry     = ovmfxen_pvh_entry_point,\r
    .e_flags     = R_386_NONE,\r
    .e_ehsize    = sizeof (hdr),\r
    .e_phentsize = sizeof (Elf32_Phdr),\r
  };\r
\r
  offset_into_file += sizeof (hdr);\r
\r
  hdr.e_ident[EI_CLASS]   = ELFCLASS32;\r
  hdr.e_ident[EI_DATA]    = ELFDATA2LSB;\r
  hdr.e_ident[EI_VERSION] = EV_CURRENT;\r
  hdr.e_ident[EI_OSABI]   = ELFOSABI_LINUX;\r
  /* Placing program headers just after hdr */\r
  hdr.e_phoff = sizeof (hdr);\r
\r
  /* program header */\r
  Elf32_Phdr  phdr_load = {\r
    .p_type   = PT_LOAD,\r
    .p_offset = 0, /* load everything */\r
    .p_paddr  = ovmf_base_address,\r
    .p_filesz = ovmf_blob_size,\r
    .p_memsz  = ovmf_blob_size,\r
    .p_flags  = PF_X | PF_W | PF_R,\r
    .p_align  = 0,\r
  };\r
\r
  phdr_load.p_vaddr = phdr_load.p_paddr;\r
  hdr.e_phnum      += 1;\r
  offset_into_file += sizeof (phdr_load);\r
\r
  /* Xen ELF Note. */\r
\r
  xen_elfnote_phys32_entry  xen_elf_note = {\r
    .type      = XEN_ELFNOTE_PHYS32_ENTRY,\r
    .name      = "Xen",\r
    .desc      = ovmfxen_pvh_entry_point,\r
    .name_size =\r
      offsetof (xen_elfnote_phys32_entry, desc) -\r
      offsetof (xen_elfnote_phys32_entry, name),\r
    .desc_size =\r
      sizeof (xen_elfnote_phys32_entry) -\r
      offsetof (xen_elfnote_phys32_entry, desc),\r
  };\r
  Elf32_Phdr                phdr_note = {\r
    .p_type   = PT_NOTE,\r
    .p_filesz = sizeof (xen_elf_note),\r
    .p_memsz  = sizeof (xen_elf_note),\r
    .p_flags  = PF_R,\r
    .p_align  = 0,\r
  };\r
\r
  hdr.e_phnum       += 1;\r
  offset_into_file  += sizeof (phdr_note);\r
  phdr_note.p_offset = offset_into_file;\r
  phdr_note.p_paddr  = ovmf_base_address + phdr_note.p_offset;\r
  phdr_note.p_vaddr  = phdr_note.p_paddr;\r
\r
  /*\r
   * print elf header\r
   */\r
\r
  size_t  i;\r
  size_t  hdr_size  = sizeof (hdr);\r
  size_t  entry_off = offsetof (typeof(hdr), e_entry);\r
\r
  printf ("# ELF file header\n");\r
  print_hdr (&hdr, entry_off);\r
  printf ("\n");\r
  print_hdr (&hdr.e_entry, sizeof (hdr.e_entry));\r
  printf (" # hdr.e_entry\n");\r
  print_hdr (&hdr.e_entry + 1, hdr_size - entry_off - sizeof (hdr.e_entry));\r
\r
  printf ("\n\n# ELF Program segment headers\n");\r
  printf ("# - Load segment\n");\r
  for (i = 0; i < sizeof (phdr_load); i += 4) {\r
    print_hdr (((char *)&phdr_load) + i, 4);\r
    printf ("\n");\r
  }\r
\r
  printf ("# - ELFNOTE segment\n");\r
  for (i = 0; i < sizeof (phdr_note); i += 4) {\r
    print_hdr (((char *)&phdr_note) + i, 4);\r
    printf ("\n");\r
  }\r
\r
  printf ("\n# XEN_ELFNOTE_PHYS32_ENTRY\n");\r
  for (i = 0; i < sizeof (xen_elf_note); i += 4) {\r
    print_hdr (((char *)&xen_elf_note) + i, 4);\r
    printf ("\n");\r
  }\r
\r
  return 0;\r
}\r