/usr/lib/gcc/x86_64-linux-gnu/5/include/d/gcc/unwind/pe.d is in libphobos-5-dev 5.5.0-12ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 | /* GDC -- D front-end for GCC
Copyright (C) 2011, 2012 Free Software Foundation, Inc.
GCC 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, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>.
*/
/* GNU/GCC unwind interface declarations for D. This must match unwind-pe.h */
module gcc.unwind.pe;
import gcc.unwind;
import gcc.builtins;
/* Pointer encodings, from dwarf2.h. */
enum
{
DW_EH_PE_absptr = 0x00,
DW_EH_PE_omit = 0xff,
DW_EH_PE_uleb128 = 0x01,
DW_EH_PE_udata2 = 0x02,
DW_EH_PE_udata4 = 0x03,
DW_EH_PE_udata8 = 0x04,
DW_EH_PE_sleb128 = 0x09,
DW_EH_PE_sdata2 = 0x0A,
DW_EH_PE_sdata4 = 0x0B,
DW_EH_PE_sdata8 = 0x0C,
DW_EH_PE_signed = 0x08,
DW_EH_PE_pcrel = 0x10,
DW_EH_PE_textrel = 0x20,
DW_EH_PE_datarel = 0x30,
DW_EH_PE_funcrel = 0x40,
DW_EH_PE_aligned = 0x50,
DW_EH_PE_indirect = 0x80
}
version(NO_SIZE_OF_ENCODED_VALUE) {}
else
{
/* Given an encoding, return the number of bytes the format occupies.
This is only defined for fixed-size encodings, and so does not
include leb128. */
uint size_of_encoded_value(ubyte encoding)
{
if (encoding == DW_EH_PE_omit)
return 0;
final switch (encoding & 0x07)
{
case DW_EH_PE_absptr:
return (void *).sizeof;
case DW_EH_PE_udata2:
return 2;
case DW_EH_PE_udata4:
return 4;
case DW_EH_PE_udata8:
return 8;
}
assert(0);
}
}
version(NO_BASE_OF_ENCODED_VALUE) {}
else
{
/* Given an encoding and an _Unwind_Context, return the base to which
the encoding is relative. This base may then be passed to
read_encoded_value_with_base for use when the _Unwind_Context is
not available. */
_Unwind_Ptr
base_of_encoded_value(ubyte encoding, _Unwind_Context *context)
{
if (encoding == DW_EH_PE_omit)
return cast(_Unwind_Ptr) 0;
final switch (encoding & 0x70)
{
case DW_EH_PE_absptr:
case DW_EH_PE_pcrel:
case DW_EH_PE_aligned:
return cast(_Unwind_Ptr) 0;
case DW_EH_PE_textrel:
return _Unwind_GetTextRelBase(context);
case DW_EH_PE_datarel:
return _Unwind_GetDataRelBase(context);
case DW_EH_PE_funcrel:
return _Unwind_GetRegionStart(context);
}
assert(0);
}
}
/* Read an unsigned leb128 value from P, store the value in VAL, return
P incremented past the value. We assume that a word is large enough to
hold any value so encoded; if it is smaller than a pointer on some target,
pointers should not be leb128 encoded on that target. */
ubyte *
read_uleb128(ubyte *p, _uleb128_t *val)
{
uint shift = 0;
ubyte a_byte;
_uleb128_t result;
result = cast(_uleb128_t) 0;
do
{
a_byte = *p++;
result |= (cast(_uleb128_t)a_byte & 0x7f) << shift;
shift += 7;
}
while (a_byte & 0x80);
*val = result;
return p;
}
/* Similar, but read a signed leb128 value. */
ubyte *
read_sleb128(ubyte *p, _sleb128_t *val)
{
uint shift = 0;
ubyte a_byte;
_uleb128_t result;
result = cast(_uleb128_t) 0;
do
{
a_byte = *p++;
result |= (cast(_uleb128_t)a_byte & 0x7f) << shift;
shift += 7;
}
while (a_byte & 0x80);
/* Sign-extend a negative value. */
if (shift < 8 * result.sizeof && (a_byte & 0x40) != 0)
result |= -((cast(_uleb128_t)1L) << shift);
*val = cast(_sleb128_t) result;
return p;
}
/* Load an encoded value from memory at P. The value is returned in VAL;
The function returns P incremented past the value. BASE is as given
by base_of_encoded_value for this encoding in the appropriate context. */
ubyte *
read_encoded_value_with_base(ubyte encoding, _Unwind_Ptr base,
ubyte *p, _Unwind_Ptr *val)
{
union unaligned
{
align(1):
void *ptr;
ushort u2;
uint u4;
ulong u8;
short s2;
int s4;
long s8;
}
unaligned *u = cast(unaligned *) p;
_Unwind_Internal_Ptr result;
if (encoding == DW_EH_PE_aligned)
{
_Unwind_Internal_Ptr a = cast(_Unwind_Internal_Ptr) p;
a = cast(_Unwind_Internal_Ptr)( (a + (void *).sizeof - 1) & - (void *).sizeof );
result = *cast(_Unwind_Internal_Ptr *) a;
p = cast(ubyte *) cast(_Unwind_Internal_Ptr) (a + (void *).sizeof);
}
else
{
switch (encoding & 0x0f)
{
case DW_EH_PE_absptr:
result = cast(_Unwind_Internal_Ptr) u.ptr;
p += (void *).sizeof;
break;
case DW_EH_PE_uleb128:
{
_uleb128_t tmp;
p = read_uleb128(p, &tmp);
result = cast(_Unwind_Internal_Ptr) tmp;
}
break;
case DW_EH_PE_sleb128:
{
_sleb128_t tmp;
p = read_sleb128(p, &tmp);
result = cast(_Unwind_Internal_Ptr) tmp;
}
break;
case DW_EH_PE_udata2:
result = cast(_Unwind_Internal_Ptr) u.u2;
p += 2;
break;
case DW_EH_PE_udata4:
result = cast(_Unwind_Internal_Ptr) u.u4;
p += 4;
break;
case DW_EH_PE_udata8:
result = cast(_Unwind_Internal_Ptr) u.u8;
p += 8;
break;
case DW_EH_PE_sdata2:
result = cast(_Unwind_Internal_Ptr) u.s2;
p += 2;
break;
case DW_EH_PE_sdata4:
result = cast(_Unwind_Internal_Ptr) u.s4;
p += 4;
break;
case DW_EH_PE_sdata8:
result = cast(_Unwind_Internal_Ptr) u.s8;
p += 8;
break;
default:
__builtin_trap();
}
if (result != 0)
{
result += ((encoding & 0x70) == DW_EH_PE_pcrel
? cast(_Unwind_Internal_Ptr) u : base);
if (encoding & DW_EH_PE_indirect)
result = *cast(_Unwind_Internal_Ptr *) result;
}
}
*val = result;
return p;
}
version (NO_BASE_OF_ENCODED_VALUE) {}
else
{
/* Like read_encoded_value_with_base, but get the base from the context
rather than providing it directly. */
ubyte *
read_encoded_value(_Unwind_Context *context, ubyte encoding,
ubyte *p, _Unwind_Ptr *val)
{
return read_encoded_value_with_base(encoding,
base_of_encoded_value(encoding, context),
p, val);
}
}
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