system_cmds/gcore.tproj/loader_additions.h

   1 /*
   2  * Copyright (c) 2015 Apple Inc.  All rights reserved.
   3  */
   4
   5 #include <mach-o/loader.h>
   6
   7 #ifndef _LOADER_ADDITIONS_H
   8 #define _LOADER_ADDITIONS_H
   9
  10 /*
  11  * Something like this should end up in <mach-o/loader.h>
  12  */
  13
  14 #define proto_LC_COREINFO       0x140   /* unofficial value!! */
  15
  16 #define proto_CORETYPE_KERNEL   1
  17 #define proto_CORETYPE_USER             2
  18 #define proto_CORETYPE_IBOOT    3
  19
  20 struct proto_coreinfo_command {
  21     uint32_t cmd;               /* LC_COREINFO */
  22     uint32_t cmdsize;   /* total size of this command */
  23     uint32_t version;   /* currently 1 */
  24     uint16_t type;              /* CORETYPE_KERNEL, CORETYPE_USER etc. */
  25         uint16_t pageshift;     /* log2 host pagesize */
  26         /* content & interpretation depends on 'type' field */
  27     uint64_t address;   /* load address of "main binary" */
  28     uint8_t uuid[16];   /* uuid of "main binary" */
  29     uint64_t dyninfo;   /* dynamic modules info */
  30 };
  31
  32 #define proto_LC_FILEREF 0x141 /* unofficial value! */
  33
  34 #define FREF_ID_SHIFT           0
  35 #define FREF_ID_MASK            0x7     /* up to 8 flavors */
  36
  37 typedef enum {
  38         kFREF_ID_NONE = 0,                      /* file has no available verifying ID */
  39         kFREF_ID_UUID = 1,                      /* file has an associated UUID */
  40         kFREF_ID_MTIMESPEC_LE = 2,      /* file has a specific mtime */
  41                                                                 /* one day: file has a computed hash? */
  42 } fref_type_t;
  43
  44 #define FREF_ID_TYPE(f)         ((fref_type_t)(((f) >> FREF_ID_SHIFT) & FREF_ID_MASK))
  45 #define FREF_MAKE_FLAGS(t)      (((t) & FREF_ID_MASK) << FREF_ID_SHIFT)
  46
  47 struct proto_fileref_command {
  48     uint32_t cmd;       /* LC_FILEREF */
  49     uint32_t cmdsize;
  50     union lc_str filename;  /* filename these bits come from */
  51     uint8_t id[16];             /* uuid, size or hash etc. */
  52     uint64_t vmaddr;    /* memory address of this segment */
  53     uint64_t vmsize;    /* memory size of this segment */
  54     uint64_t fileoff;   /* file offset of this segment */
  55     uint64_t filesize;  /* amount to map from the file */
  56     vm_prot_t maxprot;  /* maximum VM protection */
  57     vm_prot_t prot;     /* current VM protection */
  58         uint32_t flags;
  59     uint8_t share_mode; /* SM_COW etc. */
  60     uint8_t purgable;   /* VM_PURGABLE_NONVOLATILE etc. */
  61     uint8_t tag;        /* VM_MEMORY_MALLOC etc. */
  62     uint8_t extp;       /* external pager */
  63 };
  64
  65 #define proto_LC_COREDATA       0x142   /* unofficial value! */
  66
  67 /*
  68  * These are flag bits for the segment_command 'flags' field.
  69  */
  70
  71 #define COMP_ALG_MASK 0x7
  72 /* carve out 3 bits for an enum i.e. allow for 7 flavors */
  73 #define COMP_ALG_SHIFT 4 /* (bottom 4 bits taken) */
  74
  75 /* zero -> no compression */
  76 typedef enum {
  77         kCOMP_NONE      = 0,
  78         kCOMP_LZ4   = 1,        /* 0x100 */
  79         kCOMP_ZLIB  = 2,        /* 0x205 */
  80         kCOMP_LZMA  = 3,        /* 0x306 */
  81         kCOMP_LZFSE = 4,        /* 0x801 */
  82 } compression_flavor_t;
  83
  84 #define COMP_ALG_TYPE(f)        ((compression_flavor_t)((f) >> COMP_ALG_SHIFT) & COMP_ALG_MASK)
  85 #define COMP_MAKE_FLAGS(t)      (((t) & COMP_ALG_MASK) << COMP_ALG_SHIFT)
  86
  87 struct proto_coredata_command {
  88     uint32_t cmd;       /* LC_COREDATA */
  89     uint32_t cmdsize;
  90     uint64_t vmaddr;    /* memory address of this segment */
  91     uint64_t vmsize;    /* memory size of this segment */
  92     uint64_t fileoff;   /* file offset of this segment */
  93     uint64_t filesize;  /* amount to map from the file */
  94     vm_prot_t maxprot;  /* maximum VM protection */
  95     vm_prot_t prot;     /* current VM protection */
  96     uint32_t flags;
  97     uint8_t share_mode; /* SM_COW etc. */
  98     uint8_t purgable;   /* VM_PURGABLE_NONVOLATILE etc. */
  99     uint8_t tag;        /* VM_MEMORY_MALLOC etc. */
 100     uint8_t extp;       /* external pager */
 101 };
 102
 103 #endif /* _LOADER_ADDITIONS_H */