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ntdll: Implement the arm64 machine frame and context unwind opcodes. 

Signed-off-by: Martin Storsjo <martin@martin.st>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Martin Storsjo 2020-08-25 12:26:28 +03:00 committed by Alexandre Julliard
parent 41d1fd3229
commit bc3284f818
2 changed files with 94 additions and 1 deletions
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13
dlls/ntdll/signal_arm64.c
View File

@ -635,6 +635,15 @@ static void process_unwind_codes( BYTE *ptr, BYTE *end, CONTEXT *context,
ptr += len;
continue;
}
else if (*ptr == 0xe9) /* MSFT_OP_MACHINE_FRAME */
{
context->Pc = ((DWORD64 *)context->Sp)[1];
context->Sp = ((DWORD64 *)context->Sp)[0];
}
else if (*ptr == 0xea) /* MSFT_OP_CONTEXT */
{
memcpy( context, (DWORD64 *)context->Sp, sizeof(CONTEXT) );
}
else
{
WARN( "unsupported code %02x\n", *ptr );
@ -891,13 +900,15 @@ PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG_PTR base, ULONG_PTR pc,
*handler_data = NULL;
context->Pc = 0;
if (func->u.s.Flag)
handler = unwind_packed_data( base, pc, func, context, ctx_ptr );
else
handler = unwind_full_data( base, pc, func, context, handler_data, ctx_ptr );
TRACE( "ret: lr=%lx sp=%lx handler=%p\n", context->u.s.Lr, context->Sp, handler );
context->Pc = context->u.s.Lr;
if (!context->Pc)
context->Pc = context->u.s.Lr;
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
*frame_ret = context->Sp;
return handler;

82
dlls/ntdll/tests/exception.c
View File

@ -4539,12 +4539,94 @@ static void test_virtual_unwind(void)
#endif
};
static const BYTE function_2[] =
{
0xff, 0x43, 0x00, 0xd1, /* 00: sub sp, sp, #16 */
0x1f, 0x20, 0x03, 0xd5, /* 04: nop */
0xff, 0x43, 0x00, 0xd1, /* 08: sub sp, sp, #16 */
0x1f, 0x20, 0x03, 0xd5, /* 0c: nop */
0xc0, 0x03, 0x5f, 0xd6, /* 10: ret */
};
static const DWORD unwind_info_2_header =
(sizeof(function_2)/4) | /* function length */
(0 << 20) | /* X */
(0 << 21) | /* E */
(0 << 22) | /* epilog */
(1 << 27); /* codes */
static const BYTE unwind_info_2[] =
{
DW(unwind_info_2_header),
UWOP_ALLOC_SMALL(16), /* sub sp, sp, #16 */
UWOP_MACHINE_FRAME,
UWOP_ALLOC_SMALL(16), /* sub sp, sp, #16 */
UWOP_END,
};
/* Partial prologues with the custom frame opcodes (machine frame,
* context) behave like there's an off-by-one bug; unwinding from
* offset 0, which normally does nothing, executes one opcode if
* there's a machine frame or context in the prologue, and for other
* offsets, it behaves like unwinding from one instruction further
* ahead. So only test the full prologue case. */
static const struct results results_2[] =
{
/* offset fp handler pc frame offset registers */
#if 0
{ 0x00, 0x00, 0, ORIG_LR, 0x010, TRUE, { {-1,-1} }},
{ 0x04, 0x00, 0, 0x0008, 0x010, FALSE, { {-1,-1} }},
{ 0x08, 0x00, 0, 0x0018, 0x020, FALSE, { {-1,-1} }},
#endif
{ 0x0c, 0x00, 0, 0x0018, 0x020, FALSE, { {-1,-1} }},
};
static const BYTE function_3[] =
{
0xff, 0x43, 0x00, 0xd1, /* 00: sub sp, sp, #16 */
0x1f, 0x20, 0x03, 0xd5, /* 04: nop */
0xff, 0x43, 0x00, 0xd1, /* 08: sub sp, sp, #16 */
0x1f, 0x20, 0x03, 0xd5, /* 0c: nop */
0xc0, 0x03, 0x5f, 0xd6, /* 10: ret */
};
static const DWORD unwind_info_3_header =
(sizeof(function_3)/4) | /* function length */
(0 << 20) | /* X */
(0 << 21) | /* E */
(0 << 22) | /* epilog */
(1 << 27); /* codes */
static const BYTE unwind_info_3[] =
{
DW(unwind_info_3_header),
UWOP_ALLOC_SMALL(16), /* sub sp, sp, #16 */
UWOP_CONTEXT,
UWOP_ALLOC_SMALL(16), /* sub sp, sp, #16 */
UWOP_END,
};
static const struct results results_3[] =
{
/* offset fp handler pc frame offset registers */
#if 0
{ 0x00, 0x00, 0, ORIG_LR, 0x010, TRUE, { {-1,-1} }},
{ 0x04, 0x00, 0 , 0x0108, 0x110, FALSE, { {x0, 0x08}, {x1, 0x10}, {x2, 0x18}, {x3, 0x20}, {x4, 0x28}, {x5, 0x30}, {x6, 0x38}, {x7, 0x40}, {x8, 0x48}, {x9, 0x50}, {x10, 0x58}, {x11, 0x60}, {x12, 0x68}, {x13, 0x70}, {x14, 0x78}, {x15, 0x80}, {x16, 0x88}, {x17, 0x90}, {x18, 0x98}, {x19, 0xA0}, {x20, 0xA8}, {x21, 0xB0}, {x22, 0xB8}, {x23, 0xC0}, {x24, 0xC8}, {x25, 0xD0}, {x26, 0xD8}, {x27, 0xE0}, {x28, 0xE8}, {x29, 0xF0}, {lr, 0xF8}, {d0, 0x110}, {d1, 0x120}, {d2, 0x130}, {d3, 0x140}, {d4, 0x150}, {d5, 0x160}, {d6, 0x170}, {d7, 0x180}, {d8, 0x190}, {d9, 0x1a0}, {d10, 0x1b0}, {d11, 0x1c0}, {d12, 0x1d0}, {d13, 0x1e0}, {d14, 0x1f0}, {d15, 0x200}, {-1,-1} }},
{ 0x08, 0x00, 0 , 0x0118, 0x120, FALSE, { {x0, 0x18}, {x1, 0x20}, {x2, 0x28}, {x3, 0x30}, {x4, 0x38}, {x5, 0x40}, {x6, 0x48}, {x7, 0x50}, {x8, 0x58}, {x9, 0x60}, {x10, 0x68}, {x11, 0x70}, {x12, 0x78}, {x13, 0x80}, {x14, 0x88}, {x15, 0x90}, {x16, 0x98}, {x17, 0xA0}, {x18, 0xA8}, {x19, 0xB0}, {x20, 0xB8}, {x21, 0xC0}, {x22, 0xC8}, {x23, 0xD0}, {x24, 0xD8}, {x25, 0xE0}, {x26, 0xE8}, {x27, 0xF0}, {x28, 0xF8}, {x29, 0x100}, {lr, 0x108}, {d0, 0x120}, {d1, 0x130}, {d2, 0x140}, {d3, 0x150}, {d4, 0x160}, {d5, 0x170}, {d6, 0x180}, {d7, 0x190}, {d8, 0x1a0}, {d9, 0x1b0}, {d10, 0x1c0}, {d11, 0x1d0}, {d12, 0x1e0}, {d13, 0x1f0}, {d14, 0x200}, {d15, 0x210}, {-1,-1} }},
#endif
{ 0x0c, 0x00, 0 , 0x0118, 0x120, FALSE, { {x0, 0x18}, {x1, 0x20}, {x2, 0x28}, {x3, 0x30}, {x4, 0x38}, {x5, 0x40}, {x6, 0x48}, {x7, 0x50}, {x8, 0x58}, {x9, 0x60}, {x10, 0x68}, {x11, 0x70}, {x12, 0x78}, {x13, 0x80}, {x14, 0x88}, {x15, 0x90}, {x16, 0x98}, {x17, 0xA0}, {x18, 0xA8}, {x19, 0xB0}, {x20, 0xB8}, {x21, 0xC0}, {x22, 0xC8}, {x23, 0xD0}, {x24, 0xD8}, {x25, 0xE0}, {x26, 0xE8}, {x27, 0xF0}, {x28, 0xF8}, {x29, 0x100}, {lr, 0x108}, {d0, 0x120}, {d1, 0x130}, {d2, 0x140}, {d3, 0x150}, {d4, 0x160}, {d5, 0x170}, {d6, 0x180}, {d7, 0x190}, {d8, 0x1a0}, {d9, 0x1b0}, {d10, 0x1c0}, {d11, 0x1d0}, {d12, 0x1e0}, {d13, 0x1f0}, {d14, 0x200}, {d15, 0x210}, {-1,-1} }},
};
static const struct unwind_test tests[] =
{
#define TEST(func, unwind, unwind_packed, results) \
{ func, sizeof(func), unwind, unwind_packed ? 0 : sizeof(unwind), results, ARRAY_SIZE(results) }
TEST(function_0, unwind_info_0, 0, results_0),
TEST(function_1, unwind_info_1, 1, results_1),
TEST(function_2, unwind_info_2, 0, results_2),
TEST(function_3, unwind_info_3, 0, results_3),
#undef TEST
};
unsigned int i;