Kaydet (Commit) 6b839347 authored tarafından Luboš Luňák's avatar Luboš Luňák

fix gcc inline assembler operands usage

Apparently whoever did these didn't get the gcc docs and specified
every operand only as input, and then added volatile, explicit
initialization and what not until it worked. Specify output operands
correctly instead.
I couldn't verify all assembler variants, as I don't know them,
but the ones I don't know had at least some proper usage of output
operands, so I'll assume those are all correct.

Change-Id: I2910308b5e00cce8db756496df50ed26cfe35bb6
üst 8d48e779
......@@ -67,11 +67,11 @@ void callVirtualMethod(
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long edx = 0, eax = 0; // for register returns
void * stackptr = 0;
long edx, eax; // for register returns
void * stackptr;
asm volatile (
"mov %%esp, %6\n\t"
"mov %0, %%eax\n\t"
"mov %%esp, %2\n\t"
"mov %3, %%eax\n\t"
"mov %%eax, %%edx\n\t"
// stack padding to keep stack aligned:
"shl $2, %%eax\n\t"
......@@ -83,28 +83,27 @@ void callVirtualMethod(
"mov %%edx, %%eax\n\t"
"dec %%edx\n\t"
"shl $2, %%edx\n\t"
"add %1, %%edx\n"
"add %4, %%edx\n"
"Lcopy:\n\t"
"pushl 0(%%edx)\n\t"
"sub $4, %%edx\n\t"
"dec %%eax\n\t"
"jne Lcopy\n\t"
// do the actual call
"mov %2, %%edx\n\t"
"mov %5, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"mov %3, %%eax\n\t"
"mov %6, %%eax\n\t"
"shl $2, %%eax\n\t"
"add %%eax, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"call *%%edx\n\t"
// save return registers
"mov %%eax, %4\n\t"
"mov %%edx, %5\n\t"
"mov %%eax, %0\n\t"
"mov %%edx, %1\n\t"
// cleanup stack
"mov %6, %%esp\n\t"
:
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
"m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
"mov %2, %%esp\n\t"
: "=m"(eax), "=m"(edx), "=m"(stackptr)
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr), "m"(nVtableIndex)
: "eax", "edx" );
switch( pReturnTypeDescr->eTypeClass )
{
......
......@@ -62,44 +62,43 @@ void CPPU_CURRENT_NAMESPACE::callVirtualMethod(
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
#endif
volatile long edx = 0, eax = 0; // for register returns
long edx, eax; // for register returns
void * stackptr;
asm volatile (
"mov %%esp, %6\n\t"
"mov %%esp, %2\n\t"
// preserve potential 128bit stack alignment
"and $0xfffffff0, %%esp\n\t"
"mov %0, %%eax\n\t"
"mov %3, %%eax\n\t"
"lea -4(,%%eax,4), %%eax\n\t"
"and $0xf, %%eax\n\t"
"sub $0xc, %%eax\n\t"
"add %%eax, %%esp\n\t"
// copy values
"mov %0, %%eax\n\t"
"mov %3, %%eax\n\t"
"mov %%eax, %%edx\n\t"
"dec %%edx\n\t"
"shl $2, %%edx\n\t"
"add %1, %%edx\n"
"add %4, %%edx\n"
"Lcopy:\n\t"
"pushl 0(%%edx)\n\t"
"sub $4, %%edx\n\t"
"dec %%eax\n\t"
"jne Lcopy\n\t"
// do the actual call
"mov %2, %%edx\n\t"
"mov %5, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"mov %3, %%eax\n\t"
"mov %6, %%eax\n\t"
"shl $2, %%eax\n\t"
"add %%eax, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"call *%%edx\n\t"
// save return registers
"mov %%eax, %4\n\t"
"mov %%edx, %5\n\t"
"mov %%eax, %0\n\t"
"mov %%edx, %1\n\t"
// cleanup stack
"mov %6, %%esp\n\t"
:
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
"m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
"mov %2, %%esp\n\t"
: "=m"(eax), "=m"(edx), "=m"(stackptr)
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr), "m"(nVtableIndex)
: "eax", "ecx", "edx" );
switch( pReturnTypeDescr->eTypeClass )
{
......
......@@ -70,9 +70,9 @@ void callVirtualMethod( void * pAdjustedThisPtr,
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long o0 = 0, o1 = 0; // for register returns
volatile double f0d = 0;
volatile float f0f = 0;
long o0, o1; // for register returns
double f0d;
float f0f;
volatile long long saveReg[7];
__asm__ (
......@@ -231,12 +231,15 @@ void callVirtualMethod( void * pAdjustedThisPtr,
"ldd [%%l7], %%o4\n\t"
"add %%l7, 8, %%l7\n\t"
"ldd [%%l7], %%l6\n\t"
: :
"m"(o0),
"m"(o1),
"m"(f0d),
"m"(f0f),
:
"=m"(o0),
"=m"(o1),
"=m"(f0d),
"=m"(f0f),
:
"r"(&saveReg[0])
:
"memory"
);
switch( eReturnType )
{
......
......@@ -70,11 +70,11 @@ void callVirtualMethod(
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long edx = 0, eax = 0; // for register returns
void * stackptr = 0;
long edx, eax; // for register returns
void * stackptr;
asm volatile (
"mov %%esp, %6\n\t"
"mov %0, %%eax\n\t"
"mov %%esp, %2\n\t"
"mov %3, %%eax\n\t"
"mov %%eax, %%edx\n\t"
// stack padding to keep stack aligned:
"shl $2, %%eax\n\t"
......@@ -86,28 +86,27 @@ void callVirtualMethod(
"mov %%edx, %%eax\n\t"
"dec %%edx\n\t"
"shl $2, %%edx\n\t"
"add %1, %%edx\n"
"add %4, %%edx\n"
"Lcopy:\n\t"
"pushl 0(%%edx)\n\t"
"sub $4, %%edx\n\t"
"dec %%eax\n\t"
"jne Lcopy\n\t"
// do the actual call
"mov %2, %%edx\n\t"
"mov %5, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"mov %3, %%eax\n\t"
"mov %6, %%eax\n\t"
"shl $2, %%eax\n\t"
"add %%eax, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"call *%%edx\n\t"
// save return registers
"mov %%eax, %4\n\t"
"mov %%edx, %5\n\t"
"mov %%eax, %0\n\t"
"mov %%edx, %1\n\t"
// cleanup stack
"mov %6, %%esp\n\t"
:
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
"m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
"mov %2, %%esp\n\t"
: "=m"(eax), "=m"(edx), "=m"(stackptr)
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr), "m"(nVtableIndex)
: "eax", "ecx", "edx" );
switch( pReturnTypeDescr->eTypeClass )
{
......@@ -131,10 +130,10 @@ void callVirtualMethod(
*(unsigned char*)pRegisterReturn = eax;
break;
case typelib_TypeClass_FLOAT:
asm ( "fstps %0" : : "m"(*(char *)pRegisterReturn) );
asm ( "fstps %0" : "=m"(*(char *)pRegisterReturn) );
break;
case typelib_TypeClass_DOUBLE:
asm ( "fstpl %0\n\t" : : "m"(*(char *)pRegisterReturn) );
asm ( "fstpl %0\n\t" : "=m"(*(char *)pRegisterReturn) );
break;
default: {
sal_Int32 const nRetSize = pReturnTypeDescr->nSize;
......
......@@ -57,37 +57,36 @@ static void callVirtualMethod(
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long edx = 0, eax = 0; // for register returns
long edx, eax; // for register returns
void * stackptr;
asm volatile (
"mov %%esp, %6\n\t"
"mov %%esp, %2\n\t"
// copy values
"mov %0, %%eax\n\t"
"mov %3, %%eax\n\t"
"mov %%eax, %%edx\n\t"
"dec %%edx\n\t"
"shl $2, %%edx\n\t"
"add %1, %%edx\n"
"add %4, %%edx\n"
"Lcopy:\n\t"
"pushl 0(%%edx)\n\t"
"sub $4, %%edx\n\t"
"dec %%eax\n\t"
"jne Lcopy\n\t"
// do the actual call
"mov %2, %%edx\n\t"
"mov %5, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"mov %3, %%eax\n\t"
"mov %6, %%eax\n\t"
"shl $2, %%eax\n\t"
"add %%eax, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"call *%%edx\n\t"
// save return registers
"mov %%eax, %4\n\t"
"mov %%edx, %5\n\t"
"mov %%eax, %0\n\t"
"mov %%edx, %1\n\t"
// cleanup stack
"mov %6, %%esp\n\t"
:
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
"m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
"mov %2, %%esp\n\t"
: "=m"(eax), "=m"(edx), "=m"(stackptr)
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr), "m"(nVtableIndex)
: "eax", "ecx", "edx" );
switch( eReturnType )
{
......
......@@ -68,9 +68,9 @@ void callVirtualMethod( void * pAdjustedThisPtr,
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long o0 = 0, o1 = 0; // for register returns
volatile double f0d = 0;
volatile float f0f = 0;
long o0, o1; // for register returns
double f0d;
float f0f;
volatile long long saveReg[7];
__asm__ (
......@@ -229,12 +229,14 @@ void callVirtualMethod( void * pAdjustedThisPtr,
"ldd [%%l7], %%o4\n\t"
"add %%l7, 8, %%l7\n\t"
"ldd [%%l7], %%l6\n\t"
: :
"m"(o0),
"m"(o1),
"m"(f0d),
"m"(f0f),
:
"=m"(o0),
"=m"(o1),
"=m"(f0d),
"=m"(f0f),
:
"r"(&saveReg[0])
: "memory"
);
switch( eReturnType )
{
......
......@@ -56,37 +56,36 @@ void CPPU_CURRENT_NAMESPACE::callVirtualMethod(
// never called
if (! pAdjustedThisPtr) CPPU_CURRENT_NAMESPACE::dummy_can_throw_anything("xxx"); // address something
volatile long edx = 0, eax = 0; // for register returns
long edx, eax; // for register returns
void * stackptr;
asm volatile (
"mov %%esp, %6\n\t"
"mov %%esp, %2\n\t"
// copy values
"mov %0, %%eax\n\t"
"mov %3, %%eax\n\t"
"mov %%eax, %%edx\n\t"
"dec %%edx\n\t"
"shl $2, %%edx\n\t"
"add %1, %%edx\n"
"add %4, %%edx\n"
"Lcopy:\n\t"
"pushl 0(%%edx)\n\t"
"sub $4, %%edx\n\t"
"dec %%eax\n\t"
"jne Lcopy\n\t"
// do the actual call
"mov %2, %%edx\n\t"
"mov %5, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"mov %3, %%eax\n\t"
"mov %6, %%eax\n\t"
"shl $2, %%eax\n\t"
"add %%eax, %%edx\n\t"
"mov 0(%%edx), %%edx\n\t"
"call *%%edx\n\t"
// save return registers
"mov %%eax, %4\n\t"
"mov %%edx, %5\n\t"
"mov %%eax, %0\n\t"
"mov %%edx, %1\n\t"
// cleanup stack
"mov %6, %%esp\n\t"
:
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr),
"m"(nVtableIndex), "m"(eax), "m"(edx), "m"(stackptr)
"mov %2, %%esp\n\t"
: "=m"(eax), "=m"(edx), "=m"(stackptr)
: "m"(nStackLongs), "m"(pStackLongs), "m"(pAdjustedThisPtr), "m"(nVtableIndex)
: "eax", "ecx", "edx" );
switch( returnType->eTypeClass )
{
......
......@@ -58,7 +58,7 @@ public:
m_ER.pHandlerClass = this;
m_ER.hp = handler;
asm("movl %%fs:0, %%eax\n\t"
"movl %%eax, %0": : "m" (m_ER.prev): "%eax" );
"movl %%eax, %0": "=m" (m_ER.prev): : "%eax" );
asm("movl %0, %%eax\n\t"
"movl %%eax, %%fs:0": : "r" (&m_ER): "%eax" );
}
......
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