vcruntime140_1: Implement function description version 4 structures reading.
Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban
Alexandre Julliard
parent
68bbf86483
commit
7f4a880fc5
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@ -0,0 +1,54 @@
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/*
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* vcruntime140_1 x86_64 C++ exception handling
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*
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* Copyright 2002 Alexandre Julliard
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* Copyright 2020 Piotr Caban
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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typedef void (*vtable_ptr)(void);
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/* type_info object, see cpp.c for implementation */
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typedef struct __type_info
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{
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const vtable_ptr *vtable;
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char *name; /* Unmangled name, allocated lazily */
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char mangled[64]; /* Variable length, but we declare it large enough for static RTTI */
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} type_info;
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typedef struct
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{
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int this_offset; /* offset of base class this pointer from start of object */
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int vbase_descr; /* offset of virtual base class descriptor */
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int vbase_offset; /* offset of this pointer offset in virtual base class descriptor */
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} this_ptr_offsets;
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/* complete information about a C++ type */
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typedef struct __cxx_type_info
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{
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UINT flags;
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unsigned int type_info;
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this_ptr_offsets offsets;
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unsigned int size;
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unsigned int copy_ctor;
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} cxx_type_info;
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static inline const char *dbgstr_type_info( const type_info *info )
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{
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if (!info) return "{}";
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return wine_dbg_sprintf( "{vtable=%p name=%s (%s)}",
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info->vtable, info->mangled, info->name ? info->name : "" );
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}
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@ -21,13 +21,302 @@
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#ifdef __x86_64__
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#include "wine/debug.h"
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#include "cppexcept.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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typedef struct
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{
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BYTE header;
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UINT bbt_flags;
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UINT unwind_count;
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UINT unwind_map;
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UINT tryblock_count;
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UINT tryblock_map;
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UINT ip_count;
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UINT ip_map;
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UINT frame;
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} cxx_function_descr;
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#define FUNC_DESCR_IS_CATCH 0x01
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#define FUNC_DESCR_IS_SEPARATED 0x02
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#define FUNC_DESCR_BBT 0x04
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#define FUNC_DESCR_UNWIND_MAP 0x08
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#define FUNC_DESCR_TRYBLOCK_MAP 0x10
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#define FUNC_DESCR_EHS 0x20
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#define FUNC_DESCR_NO_EXCEPT 0x40
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#define FUNC_DESCR_RESERVED 0x80
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typedef struct
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{
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UINT flags;
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BYTE *prev;
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UINT handler;
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UINT object;
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} unwind_info;
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typedef struct
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{
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BYTE header;
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UINT flags;
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UINT type_info;
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int offset;
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UINT handler;
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UINT ret_addr;
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} catchblock_info;
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#define CATCHBLOCK_FLAGS 0x01
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#define CATCHBLOCK_TYPE_INFO 0x02
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#define CATCHBLOCK_OFFSET 0x04
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#define CATCHBLOCK_RET_ADDR 0x10
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#define TYPE_FLAG_CONST 1
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#define TYPE_FLAG_VOLATILE 2
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#define TYPE_FLAG_REFERENCE 8
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typedef struct
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{
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UINT start_level;
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UINT end_level;
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UINT catch_level;
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UINT catchblock_count;
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UINT catchblock;
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} tryblock_info;
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typedef struct
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{
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UINT ip_off; /* relative to start of function or earlier ipmap_info */
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INT state;
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} ipmap_info;
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static UINT decode_uint(BYTE **b)
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{
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UINT ret;
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if ((**b & 1) == 0)
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{
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ret = *b[0] >> 1;
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*b += 1;
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}
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else if ((**b & 3) == 1)
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{
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ret = (*b[0] >> 2) + (*b[1] << 6);
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*b += 2;
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}
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else if ((**b & 7) == 3)
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{
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ret = (*b[0] >> 3) + (*b[1] << 5) + (*b[2] << 13);
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*b += 3;
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}
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else if ((**b & 15) == 7)
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{
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ret = (*b[0] >> 4) + (*b[1] << 4) + (*b[2] << 12) + (*b[3] << 20);
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*b += 4;
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}
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else
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{
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FIXME("not implemented - expect crash\n");
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ret = 0;
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*b += 5;
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}
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return ret;
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}
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static UINT read_rva(BYTE **b)
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{
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UINT ret = *(UINT*)(*b);
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*b += sizeof(UINT);
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return ret;
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}
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static inline void* rva_to_ptr(UINT rva, ULONG64 base)
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{
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return rva ? (void*)(base+rva) : NULL;
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}
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static BOOL read_unwind_info(BYTE **b, unwind_info *ui)
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{
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BYTE *p = *b;
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memset(ui, 0, sizeof(*ui));
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ui->flags = decode_uint(b);
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ui->prev = p - (ui->flags >> 2);
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ui->flags &= 0x3;
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if (ui->flags & 0x1)
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{
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ui->handler = read_rva(b);
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ui->object = decode_uint(b); /* frame offset */
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}
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if (ui->flags & 0x2)
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{
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FIXME("unknown flag: %x\n", ui->flags);
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return FALSE;
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}
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return TRUE;
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}
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static void read_tryblock_info(BYTE **b, tryblock_info *ti, ULONG64 image_base)
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{
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BYTE *count, *count_end;
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ti->start_level = decode_uint(b);
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ti->end_level = decode_uint(b);
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ti->catch_level = decode_uint(b);
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ti->catchblock = read_rva(b);
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count = count_end = rva_to_ptr(ti->catchblock, image_base);
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if (count)
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{
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ti->catchblock_count = decode_uint(&count_end);
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ti->catchblock += count_end - count;
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}
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else
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{
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ti->catchblock_count = 0;
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}
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}
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static BOOL read_catchblock_info(BYTE **b, catchblock_info *ci)
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{
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memset(ci, 0, sizeof(*ci));
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ci->header = **b;
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(*b)++;
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if (ci->header & ~(CATCHBLOCK_FLAGS | CATCHBLOCK_TYPE_INFO | CATCHBLOCK_OFFSET | CATCHBLOCK_RET_ADDR))
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{
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FIXME("unknown header: %x\n", ci->header);
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return FALSE;
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}
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if (ci->header & CATCHBLOCK_FLAGS) ci->flags = decode_uint(b);
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if (ci->header & CATCHBLOCK_TYPE_INFO) ci->type_info = read_rva(b);
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if (ci->header & CATCHBLOCK_OFFSET) ci->offset = decode_uint(b);
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ci->handler = read_rva(b);
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if (ci->header & CATCHBLOCK_RET_ADDR) ci->ret_addr = decode_uint(b);
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return TRUE;
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}
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static void read_ipmap_info(BYTE **b, ipmap_info *ii)
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{
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ii->ip_off = decode_uint(b);
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ii->state = (INT)decode_uint(b) - 1;
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}
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static inline void dump_type(UINT type_rva, ULONG64 base)
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{
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const cxx_type_info *type = rva_to_ptr(type_rva, base);
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TRACE("flags %x type %x %s offsets %d,%d,%d size %d copy ctor %x(%p)\n",
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type->flags, type->type_info, dbgstr_type_info(rva_to_ptr(type->type_info, base)),
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type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset,
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type->size, type->copy_ctor, rva_to_ptr(type->copy_ctor, base));
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}
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static BOOL validate_cxx_function_descr4(const cxx_function_descr *descr, DISPATCHER_CONTEXT *dispatch)
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{
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ULONG64 image_base = dispatch->ImageBase;
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BYTE *unwind_map = rva_to_ptr(descr->unwind_map, image_base);
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BYTE *tryblock_map = rva_to_ptr(descr->tryblock_map, image_base);
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BYTE *ip_map = rva_to_ptr(descr->ip_map, image_base);
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UINT i, j;
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char *ip;
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TRACE("header 0x%x\n", descr->header);
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TRACE("basic block transformations flags: 0x%x\n", descr->bbt_flags);
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TRACE("unwind table: 0x%x(%p) %d\n", descr->unwind_map, unwind_map, descr->unwind_count);
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for (i = 0; i < descr->unwind_count; i++)
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{
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BYTE *entry = unwind_map;
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unwind_info ui;
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if (!read_unwind_info(&unwind_map, &ui)) return FALSE;
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if (ui.prev < (BYTE*)rva_to_ptr(descr->unwind_map, image_base)) ui.prev = NULL;
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TRACE(" %d (%p): flags 0x%x prev %p func 0x%x(%p) object 0x%x\n",
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i, entry, ui.flags, ui.prev, ui.handler,
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rva_to_ptr(ui.handler, image_base), ui.object);
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}
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TRACE("try table: 0x%x(%p) %d\n", descr->tryblock_map, tryblock_map, descr->tryblock_count);
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for (i = 0; i < descr->tryblock_count; i++)
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{
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tryblock_info ti;
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BYTE *catchblock;
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read_tryblock_info(&tryblock_map, &ti, image_base);
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catchblock = rva_to_ptr(ti.catchblock, image_base);
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TRACE(" %d: start %d end %d catchlevel %d catch 0x%x(%p) %d\n",
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i, ti.start_level, ti.end_level, ti.catch_level,
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ti.catchblock, catchblock, ti.catchblock_count);
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for (j = 0; j < ti.catchblock_count; j++)
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{
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catchblock_info ci;
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if (!read_catchblock_info(&catchblock, &ci)) return FALSE;
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TRACE(" %d: header 0x%x offset %d handler 0x%x(%p) "
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"ret addr %x type %x %s\n", j, ci.header, ci.offset,
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ci.handler, rva_to_ptr(ci.handler, image_base),
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ci.ret_addr, ci.type_info,
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dbgstr_type_info(rva_to_ptr(ci.type_info, image_base)));
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}
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}
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TRACE("ipmap: 0x%x(%p) %d\n", descr->ip_map, ip_map, descr->ip_count);
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ip = rva_to_ptr(dispatch->FunctionEntry->BeginAddress, image_base);
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for (i = 0; i < descr->ip_count; i++)
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{
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ipmap_info ii;
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read_ipmap_info(&ip_map, &ii);
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ip += ii.ip_off;
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TRACE(" %d: ip offset 0x%x (%p) state %d\n", i, ii.ip_off, ip, ii.state);
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}
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TRACE("establisher frame: %x\n", descr->frame);
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return TRUE;
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}
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EXCEPTION_DISPOSITION __cdecl __CxxFrameHandler4(EXCEPTION_RECORD *rec,
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ULONG64 frame, CONTEXT *context, DISPATCHER_CONTEXT *dispatch)
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{
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cxx_function_descr descr;
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BYTE *p, *count, *count_end;
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FIXME("%p %lx %p %p\n", rec, frame, context, dispatch);
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memset(&descr, 0, sizeof(descr));
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p = rva_to_ptr(*(UINT*)dispatch->HandlerData, dispatch->ImageBase);
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descr.header = *p++;
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if (descr.header & ~(FUNC_DESCR_IS_CATCH | FUNC_DESCR_UNWIND_MAP |
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FUNC_DESCR_TRYBLOCK_MAP | FUNC_DESCR_EHS))
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{
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FIXME("unsupported flags: %x\n", descr.header);
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return ExceptionContinueSearch;
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}
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if (descr.header & FUNC_DESCR_BBT) descr.bbt_flags = decode_uint(&p);
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if (descr.header & FUNC_DESCR_UNWIND_MAP)
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{
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descr.unwind_map = read_rva(&p);
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count_end = count = rva_to_ptr(descr.unwind_map, dispatch->ImageBase);
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descr.unwind_count = decode_uint(&count_end);
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descr.unwind_map += count_end - count;
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}
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if (descr.header & FUNC_DESCR_TRYBLOCK_MAP)
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{
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descr.tryblock_map = read_rva(&p);
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count_end = count = rva_to_ptr(descr.tryblock_map, dispatch->ImageBase);
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descr.tryblock_count = decode_uint(&count_end);
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descr.tryblock_map += count_end - count;
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}
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descr.ip_map = read_rva(&p);
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count_end = count = rva_to_ptr(descr.ip_map, dispatch->ImageBase);
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descr.ip_count = decode_uint(&count_end);
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descr.ip_map += count_end - count;
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if (descr.header & FUNC_DESCR_IS_CATCH) descr.frame = decode_uint(&p);
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if (!validate_cxx_function_descr4(&descr, dispatch))
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return ExceptionContinueSearch;
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return ExceptionContinueSearch;
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}
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