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winedump: Rewrite dumping of packed ARM unwind info.

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This differs slightly from the official docs (which is clear in some
places, vague in others, and contradictory in some places), based
on actual observed behaviour.

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Martin Storsjö 2021-11-09 16:05:47 +02:00 committed by Alexandre Julliard
parent ae7979a42d
commit aa256deedd
1 changed files with 64 additions and 94 deletions
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158
tools/winedump/pe.c
View file

@ -787,7 +787,7 @@ static void dump_armnt_unwind_info( const struct runtime_function_armnt *fnc )
if (fnc->u.s.Flag)
{
char intregs[32] = {0}, intregspop[32] = {0}, vfpregs[32] = {0};
WORD pf = 0, ef = 0, sc = 0;
WORD pf = 0, ef = 0, fpoffset = 0, stack = fnc->u.s.StackAdjust;
printf( "\nFunction %08x-%08x:\n", fnc->BeginAddress & ~1,
(fnc->BeginAddress & ~1) + fnc->u.s.FunctionLength * 2 );
@ -805,86 +805,60 @@ static void dump_armnt_unwind_info( const struct runtime_function_armnt *fnc )
{
pf = fnc->u.s.StackAdjust & 0x04;
ef = fnc->u.s.StackAdjust & 0x08;
stack = (fnc->u.s.StackAdjust & 3) + 1;
}
if (!fnc->u.s.R && !pf)
if (!fnc->u.s.R || pf)
{
if (fnc->u.s.Reg)
int first = 4, last = fnc->u.s.Reg + 4;
if (pf)
{
sprintf(intregs, "r4-r%u", fnc->u.s.Reg + 4);
sprintf(intregspop, "r4-r%u", fnc->u.s.Reg + 4);
first = (~fnc->u.s.StackAdjust) & 3;
if (fnc->u.s.R)
last = 3;
}
if (first == last)
sprintf(intregs, "r%u", first);
else
{
strcpy(intregs, "r4");
strcpy(intregspop, "r4");
}
sc = fnc->u.s.Reg + 1;
if (fnc->u.s.C || fnc->u.s.L)
{
strcat(intregs, ", ");
if (fnc->u.s.C || (fnc->u.s.L && !fnc->u.s.H))
strcat(intregspop, ", ");
}
}
else if (fnc->u.s.R && pf)
{
if (((~fnc->u.s.StackAdjust) & 3) != 3)
{
sprintf(intregs, "r%u-r3", (~fnc->u.s.StackAdjust) & 3);
sprintf(intregspop, "r%u-r3", (~fnc->u.s.StackAdjust) & 3);
}
else
{
sprintf(intregs, "r3");
sprintf(intregspop, "r3");
}
sc = 4 - ((~fnc->u.s.StackAdjust) & 3);
if (fnc->u.s.C || fnc->u.s.L)
{
strcat(intregs, ", ");
if (fnc->u.s.C || (fnc->u.s.L && !fnc->u.s.H))
strcat(intregspop, ", ");
}
}
else if (!fnc->u.s.R && pf)
{
sprintf(intregs, "r%u-r%u", (~fnc->u.s.StackAdjust) & 3, fnc->u.s.Reg + 4);
sprintf(intregspop, "r%u-r%u", (~fnc->u.s.StackAdjust) & 3, fnc->u.s.Reg + 4);
sc = fnc->u.s.Reg + 5 - ((~fnc->u.s.StackAdjust) & 3);
if (fnc->u.s.C || fnc->u.s.L)
{
strcat(intregs, ", ");
if (fnc->u.s.C || (fnc->u.s.L && !fnc->u.s.H))
strcat(intregspop, ", ");
}
}
else if (fnc->u.s.R && !pf)
{
if (!fnc->u.s.C && !fnc->u.s.L)
{
strcpy(intregs, "none");
strcpy(intregspop, "none");
}
sprintf(intregs, "r%u-r%u", first, last);
fpoffset = last + 1 - first;
}
if (fnc->u.s.C && !fnc->u.s.L)
if (!fnc->u.s.R || ef)
{
int first = 4, last = fnc->u.s.Reg + 4;
if (ef)
{
first = (~fnc->u.s.StackAdjust) & 3;
if (fnc->u.s.R)
last = 3;
}
if (first == last)
sprintf(intregspop, "r%u", first);
else
sprintf(intregspop, "r%u-r%u", first, last);
}
if (fnc->u.s.C)
{
if (intregs[0])
strcat(intregs, ", ");
if (intregspop[0])
strcat(intregspop, ", ");
strcat(intregs, "r11");
strcat(intregspop, "r11");
}
else if (fnc->u.s.C && fnc->u.s.L)
{
strcat(intregs, "r11, lr");
if (fnc->u.s.H)
strcat(intregspop, "r11");
else
strcat(intregspop, "r11, pc");
}
else if (!fnc->u.s.C && fnc->u.s.L)
if (fnc->u.s.L)
{
if (intregs[0])
strcat(intregs, ", ");
strcat(intregs, "lr");
if (!fnc->u.s.H)
if (intregspop[0] && (fnc->u.s.Ret != 0 || !fnc->u.s.H))
strcat(intregspop, ", ");
if (fnc->u.s.Ret != 0)
strcat(intregspop, "lr");
else if (!fnc->u.s.H)
strcat(intregspop, "pc");
}
@ -895,46 +869,42 @@ static void dump_armnt_unwind_info( const struct runtime_function_armnt *fnc )
else
strcpy(vfpregs, "d8");
}
else
strcpy(vfpregs, "none");
if (fnc->u.s.H)
printf( " Unwind Code\tpush {r0-r3}\n" );
if (fnc->u.s.Flag == 1) {
if (fnc->u.s.H)
printf( " Unwind Code\tpush {r0-r3}\n" );
if (fnc->u.s.R || fnc->u.s.L || fnc->u.s.C || pf)
printf( " Unwind Code\tpush {%s}\n", intregs );
if (intregs[0])
printf( " Unwind Code\tpush {%s}\n", intregs );
if (fnc->u.s.C && fnc->u.s.R && !fnc->u.s.L && !pf)
printf( " Unwind Code\tmov r11, sp\n" );
else if (fnc->u.s.C && (!fnc->u.s.R || fnc->u.s.L || pf))
{
if (fnc->u.s.StackAdjust >= 0x03f4 && !sc)
printf( " Unwind Code\tadd r11, sp, #<unknown>\n");
else if (fnc->u.s.StackAdjust >= 0x03f4)
printf( " Unwind Code\tadd r11, sp, #%d\n", sc * 4 );
else
printf( " Unwind Code\tadd r11, sp, #%d\n", fnc->u.s.StackAdjust * 4 );
if (fnc->u.s.C && fpoffset == 0)
printf( " Unwind Code\tmov r11, sp\n" );
else if (fnc->u.s.C)
printf( " Unwind Code\tadd r11, sp, #%d\n", fpoffset * 4 );
if (fnc->u.s.R && fnc->u.s.Reg != 0x07)
printf( " Unwind Code\tvpush {%s}\n", vfpregs );
if (stack && !pf)
printf( " Unwind Code\tsub sp, sp, #%d\n", stack * 4 );
}
if (fnc->u.s.R && fnc->u.s.Reg != 0x07)
printf( " Unwind Code\tvpush {%s}\n", vfpregs );
if (fnc->u.s.Ret == 3)
return;
printf( "Epilogue:\n" );
if (fnc->u.s.StackAdjust < 0x03f4 && !pf)
printf( " Unwind Code\tsub sp, sp, #%d\n", fnc->u.s.StackAdjust * 4 );
if (fnc->u.s.StackAdjust < 0x03f4 && !ef)
printf( " Unwind Code\tadd sp, sp, #%d\n", fnc->u.s.StackAdjust * 4 );
if (stack && !ef)
printf( " Unwind Code\tadd sp, sp, #%d\n", stack * 4 );
if (fnc->u.s.R && fnc->u.s.Reg != 0x07)
printf( " Unwind Code\tvpop {%s}\n", vfpregs );
if (fnc->u.s.C || !fnc->u.s.R || ef || (fnc->u.s.L && !fnc->u.s.H))
if (intregspop[0])
printf( " Unwind Code\tpop {%s}\n", intregspop );
if (fnc->u.s.H && !fnc->u.s.L)
if (fnc->u.s.H && !(fnc->u.s.L && fnc->u.s.Ret == 0))
printf( " Unwind Code\tadd sp, sp, #16\n" );
else if (fnc->u.s.H && fnc->u.s.L)
else if (fnc->u.s.H && (fnc->u.s.L && fnc->u.s.Ret == 0))
printf( " Unwind Code\tldr pc, [sp], #20\n" );
if (fnc->u.s.Ret == 1)