//
// visit_vector_type
//
void Stub_Attribute_Generator::
visit_vector_type (const OASIS_PDL_Vector_Type & v)
{
// Declaration and implementation of the setter/getter methods
// specific to structure types
this->hfile_
<< stub_return_t (&v) << " " << this->member_name_ << " (void);"
<< "const " << stub_return_t (&v) << " " << this->member_name_ << " (void) const;";
// Implementation of the setter/getter methods for structure types.
this->cppfile_
<< function_header (this->member_name_)
<< "const " << stub_return_t (&v) << " " << this->probe_->name ()
<< "::" << this->member_name_ << " (void) const"
<< "{"
<< "return this->" << this->member_name_ << "_;"
<< "}"
<< function_header (this->member_name_)
<< stub_return_t (&v) << " " << this->probe_->name ()
<< "::" << this->member_name_ << " (void)"
<< "{"
<< "return this->" << this->member_name_ << "_;"
<< "}";
}
//
// visit_probe
//
void Stub_Dump_Generator::visit_probe (const OASIS_PDL_Probe & p)
{
// Make sure we know the base probe type.
const std::string base_probe =
p.has_base_probe () ?
("::" + p.base_probe ()->fq_name ("::")) : "::OASIS::Software_Probe";
const std::string & name = p.name ();
this->hfile_
<< std::endl
<< "public:" << std::endl
<< "/// Stub_Dump the software probe's data." << std::endl
<< "virtual void dump (std::ostream & output);" << std::endl;
// Implementation of the dump method.
this->cppfile_
<< function_header ("dump")
<< "void " << name << "::"
<< "dump (std::ostream & output) {"
<< base_probe << "::dump (output);";
if (!p.members ().empty ())
{
Stub_Dump_Variable_Generator var_gen (this->hfile_, this->cppfile_);
var_gen.parent_is_probe (true);
std::vector <OASIS_PDL_Complex_Type_Member *>::const_iterator
iter = p.members ().begin (), iter_end = p.members ().end ();
for (; iter != iter_end; ++ iter)
{
var_gen.name ((*iter)->name ());
// Call accept on the actual child type
(*iter)->type ()->accept (var_gen);
}
}
this->cppfile_
<< "}";
}
//
// visit_struct
//
void Package_Data_Generator::visit_struct (const OASIS_PDL_Struct & s)
{
this->hfile_
<< "/// Package the software probe's data." << std::endl
<< "int package_data (::OASIS::Software_Probe_Data_Packager * p);"
<< std::endl;
this->cppfile_
<< function_header ("package_data")
<< "int " << s.fq_name ("::") << "Impl::package_data (::OASIS::Software_Probe_Data_Packager * p) {";
this->var_suffix_ = "";
std::for_each (s.members ().begin (),
s.members ().end (),
boost::bind (&OASIS_PDL_Complex_Type_Member::accept,
_1,
boost::ref (*this)));
this->cppfile_
<< "return 0;"
<< "}";
}
//
// visit_probe
//
void Package_Data_Generator::visit_probe (const OASIS_PDL_Probe & p)
{
const std::string name = p.name ();
// Make sure we know the base probe type.
std::string base_probe =
p.has_base_probe () ?
("::" + p.base_probe ()->fq_name ("::") + "Impl") : "::OASIS::Software_Probe_Impl";
this->hfile_
<< std::endl
<< "/// Package the software probe's data." << std::endl
<< "protected:" << std::endl
<< "virtual int package_data (::OASIS::Software_Probe_Data_Packager * p);"
<< std::endl;
// Implement the package data method.
this->cppfile_
<< function_header ("package_data")
<< "int " << name << "Impl::package_data (::OASIS::Software_Probe_Data_Packager * p) {"
<< "if (0 != " << base_probe << "::package_data (p))" << std::endl
<< " ACE_ERROR_RETURN ((LM_ERROR," << std::endl
<< "ACE_TEXT (\"%T (%t) - %M - failed to package data\\n\"))," << std::endl
<< "-1);";
this->var_suffix_ = "_";
std::for_each (p.members ().begin (),
p.members ().end (),
boost::bind (&OASIS_PDL_Complex_Type_Member::accept,
_1,
boost::ref (*this)));
this->cppfile_
<< "return 0;"
<< "}";
}
/*******************************************************************
* BuildCallTo32CBClient
*
* Call a CBClient relay stub from 32-bit code (KERNEL.620).
*
* Since the relay stub is itself 32-bit, this should not be a problem;
* unfortunately, the relay stubs are expected to switch back to a
* 16-bit stack (and 16-bit code) after completion :-(
*
* This would conflict with our 16- vs. 32-bit stack handling, so
* we simply switch *back* to our 32-bit stack before returning to
* the caller ...
*
* The CBClient relay stub expects to be called with the following
* 16-bit stack layout, and with ebp and ebx pointing into the 16-bit
* stack at the designated places:
*
* ...
* (ebp+14) original arguments to the callback routine
* (ebp+10) far return address to original caller
* (ebp+6) Thunklet target address
* (ebp+2) Thunklet relay ID code
* (ebp) BP (saved by CBClientGlueSL)
* (ebp-2) SI (saved by CBClientGlueSL)
* (ebp-4) DI (saved by CBClientGlueSL)
* (ebp-6) DS (saved by CBClientGlueSL)
*
* ... buffer space used by the 16-bit side glue for temp copies
*
* (ebx+4) far return address to 16-bit side glue code
* (ebx) saved 16-bit ss:sp (pointing to ebx+4)
*
* The 32-bit side glue code accesses both the original arguments (via ebp)
* and the temporary copies prepared by the 16-bit side glue (via ebx).
* After completion, the stub will load ss:sp from the buffer at ebx
* and perform a far return to 16-bit code.
*
* To trick the relay stub into returning to us, we replace the 16-bit
* return address to the glue code by a cs:ip pair pointing to our
* return entry point (the original return address is saved first).
* Our return stub thus called will then reload the 32-bit ss:esp and
* return to 32-bit code (by using and ss:esp value that we have also
* pushed onto the 16-bit stack before and a cs:eip values found at
* that position on the 32-bit stack). The ss:esp to be restored is
* found relative to the 16-bit stack pointer at:
*
* (ebx-4) ss (flat)
* (ebx-8) sp (32-bit stack pointer)
*
* The second variant of this routine, CALL32_CBClientEx, which is used
* to implement KERNEL.621, has to cope with yet another problem: Here,
* the 32-bit side directly returns to the caller of the CBClient thunklet,
* restoring registers saved by CBClientGlueSL and cleaning up the stack.
* As we have to return to our 32-bit code first, we have to adapt the
* layout of our temporary area so as to include values for the registers
* that are to be restored, and later (in the implementation of KERNEL.621)
* we *really* restore them. The return stub restores DS, DI, SI, and BP
* from the stack, skips the next 8 bytes (CBClient relay code / target),
* and then performs a lret NN, where NN is the number of arguments to be
* removed. Thus, we prepare our temporary area as follows:
*
* (ebx+22) 16-bit cs (this segment)
* (ebx+20) 16-bit ip ('16-bit' return entry point)
* (ebx+16) 32-bit ss (flat)
* (ebx+12) 32-bit sp (32-bit stack pointer)
* (ebx+10) 16-bit bp (points to ebx+24)
* (ebx+8) 16-bit si (ignored)
* (ebx+6) 16-bit di (ignored)
* (ebx+4) 16-bit ds (we actually use the flat DS here)
* (ebx+2) 16-bit ss (16-bit stack segment)
* (ebx+0) 16-bit sp (points to ebx+4)
*
* Note that we ensure that DS is not changed and remains the flat segment,
* and the 32-bit stack pointer our own return stub needs fits just
* perfectly into the 8 bytes that are skipped by the Windows stub.
* One problem is that we have to determine the number of removed arguments,
* as these have to be really removed in KERNEL.621. Thus, the BP value
* that we place in the temporary area to be restored, contains the value
* that SP would have if no arguments were removed. By comparing the actual
* value of SP with this value in our return stub we can compute the number
* of removed arguments. This is then returned to KERNEL.621.
*
* The stack layout of this function:
* (ebp+20) nArgs pointer to variable receiving nr. of args (Ex only)
* (ebp+16) esi pointer to caller's esi value
* (ebp+12) arg ebp value to be set for relay stub
* (ebp+8) func CBClient relay stub address
* (ebp+4) ret addr
* (ebp) ebp
*/
static void BuildCallTo32CBClient( int isEx )
{
function_header( isEx ? "CALL32_CBClientEx" : "CALL32_CBClient" );
/* Entry code */
output_cfi( ".cfi_startproc" );
output( "\tpushl %%ebp\n" );
output_cfi( ".cfi_adjust_cfa_offset 4" );
output_cfi( ".cfi_rel_offset %%ebp,0" );
output( "\tmovl %%esp,%%ebp\n" );
output_cfi( ".cfi_def_cfa_register %%ebp" );
output( "\tpushl %%edi\n" );
output_cfi( ".cfi_rel_offset %%edi,-4" );
output( "\tpushl %%esi\n" );
output_cfi( ".cfi_rel_offset %%esi,-8" );
output( "\tpushl %%ebx\n" );
output_cfi( ".cfi_rel_offset %%ebx,-12" );
/* Get pointer to temporary area and save the 32-bit stack pointer */
output( "\tmovl 16(%%ebp), %%ebx\n" );
output( "\tleal -8(%%esp), %%eax\n" );
if ( !isEx )
output( "\tmovl %%eax, -8(%%ebx)\n" );
else
output( "\tmovl %%eax, 12(%%ebx)\n" );
/* Set up registers and call CBClient relay stub (simulating a far call) */
output( "\tmovl 20(%%ebp), %%esi\n" );
output( "\tmovl (%%esi), %%esi\n" );
output( "\tmovl 8(%%ebp), %%eax\n" );
output( "\tmovl 12(%%ebp), %%ebp\n" );
output( "\tpushl %%cs\n" );
output( "\tcall *%%eax\n" );
/* Return new esi value to caller */
output( "\tmovl 32(%%esp), %%edi\n" );
output( "\tmovl %%esi, (%%edi)\n" );
/* Return argument size to caller */
if ( isEx )
{
output( "\tmovl 36(%%esp), %%ebx\n" );
output( "\tmovl %%ebp, (%%ebx)\n" );
}
/* Restore registers and return */
output( "\tpopl %%ebx\n" );
output_cfi( ".cfi_same_value %%ebx" );
output( "\tpopl %%esi\n" );
output_cfi( ".cfi_same_value %%esi" );
output( "\tpopl %%edi\n" );
output_cfi( ".cfi_same_value %%edi" );
output( "\tpopl %%ebp\n" );
output_cfi( ".cfi_def_cfa %%esp,4" );
output_cfi( ".cfi_same_value %%ebp" );
output( "\tret\n" );
output_cfi( ".cfi_endproc" );
output_function_size( isEx ? "CALL32_CBClientEx" : "CALL32_CBClient" );
/* '16-bit' return stub */
function_header( isEx ? "CALL32_CBClientEx_Ret" : "CALL32_CBClient_Ret" );
if ( !isEx )
{
output( "\tmovzwl %%sp, %%ebx\n" );
output( "\tlssl %%ss:-16(%%ebx), %%esp\n" );
}
else
{
output( "\tmovzwl %%bp, %%ebx\n" );
output( "\tsubw %%bp, %%sp\n" );
output( "\tmovzwl %%sp, %%ebp\n" );
output( "\tlssl %%ss:-12(%%ebx), %%esp\n" );
}
output( "\tlret\n" );
output_function_size( isEx ? "CALL32_CBClientEx_Ret" : "CALL32_CBClient_Ret" );
}
/*******************************************************************
* BuildCallTo16Core
*
* This routine builds the core routines used in 32->16 thunks:
*
* extern DWORD WINAPI wine_call_to_16( FARPROC16 target, DWORD cbArgs, PEXCEPTION_HANDLER handler );
* extern void WINAPI wine_call_to_16_regs( CONTEXT86 *context, DWORD cbArgs, PEXCEPTION_HANDLER handler );
*
* These routines can be called directly from 32-bit code.
*
* All routines expect that the 16-bit stack contents (arguments) and the
* return address (segptr to CallTo16_Ret) were already set up by the
* caller; nb_args must contain the number of bytes to be conserved. The
* 16-bit SS:SP will be set accordingly.
*
* All other registers are either taken from the CONTEXT86 structure
* or else set to default values. The target routine address is either
* given directly or taken from the CONTEXT86.
*/
static void BuildCallTo16Core( int reg_func )
{
const char *name = reg_func ? "wine_call_to_16_regs" : "wine_call_to_16";
/* Function header */
function_header( name );
/* Function entry sequence */
output_cfi( ".cfi_startproc" );
output( "\tpushl %%ebp\n" );
output_cfi( ".cfi_adjust_cfa_offset 4" );
output_cfi( ".cfi_rel_offset %%ebp,0" );
output( "\tmovl %%esp, %%ebp\n" );
output_cfi( ".cfi_def_cfa_register %%ebp" );
/* Save the 32-bit registers */
output( "\tpushl %%ebx\n" );
output_cfi( ".cfi_rel_offset %%ebx,-4" );
output( "\tpushl %%esi\n" );
output_cfi( ".cfi_rel_offset %%esi,-8" );
output( "\tpushl %%edi\n" );
output_cfi( ".cfi_rel_offset %%edi,-12" );
output( "\t.byte 0x64\n\tmov %%gs,(%d)\n", GS_OFFSET );
/* Setup exception frame */
output( "\t.byte 0x64\n\tpushl (%d)\n", STACKOFFSET );
output( "\tpushl 16(%%ebp)\n" ); /* handler */
output( "\t.byte 0x64\n\tpushl (0)\n" );
output( "\t.byte 0x64\n\tmovl %%esp,(0)\n" );
/* Call the actual CallTo16 routine (simulate a lcall) */
output( "\tpushl %%cs\n" );
output( "\tcall .L%s\n", name );
/* Remove exception frame */
output( "\t.byte 0x64\n\tpopl (0)\n" );
output( "\taddl $4, %%esp\n" );
output( "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
if ( !reg_func )
{
/* Convert return value */
output( "\tandl $0xffff,%%eax\n" );
output( "\tshll $16,%%edx\n" );
output( "\torl %%edx,%%eax\n" );
}
else
{
/*
* Modify CONTEXT86 structure to contain new values
*
* NOTE: We restore only EAX, EBX, EDX, EDX, EBP, and ESP.
* The segment registers as well as ESI and EDI should
* not be modified by a well-behaved 16-bit routine in
* any case. [If necessary, we could restore them as well,
* at the cost of a somewhat less efficient return path.]
*/
output( "\tmovl 0x14(%%esp),%%edi\n" ); /* FIELD_OFFSET(STACK32FRAME,target) - FIELD_OFFSET(STACK32FRAME,edi) */
/* everything above edi has been popped already */
output( "\tmovl %%eax,0xb0(%%edi)\n"); /* Eax */
output( "\tmovl %%ebx,0xa4(%%edi)\n"); /* Ebx */
output( "\tmovl %%ecx,0xac(%%edi)\n"); /* Ecx */
output( "\tmovl %%edx,0xa8(%%edi)\n"); /* Edx */
output( "\tmovl %%ebp,0xb4(%%edi)\n"); /* Ebp */
output( "\tmovl %%esi,0xc4(%%edi)\n"); /* Esp */
/* The return glue code saved %esp into %esi */
}
/* Restore the 32-bit registers */
output( "\tpopl %%edi\n" );
output_cfi( ".cfi_same_value %%edi" );
output( "\tpopl %%esi\n" );
output_cfi( ".cfi_same_value %%esi" );
output( "\tpopl %%ebx\n" );
output_cfi( ".cfi_same_value %%ebx" );
/* Function exit sequence */
output( "\tpopl %%ebp\n" );
output_cfi( ".cfi_def_cfa %%esp,4" );
output_cfi( ".cfi_same_value %%ebp" );
output( "\tret $12\n" );
output_cfi( ".cfi_endproc" );
/* Start of the actual CallTo16 routine */
output( ".L%s:\n", name );
/* Switch to the 16-bit stack */
output( "\tmovl %%esp,%%edx\n" );
output( "\t.byte 0x64\n\tmovw (%d),%%ss\n", STACKOFFSET + 2);
output( "\t.byte 0x64\n\tmovw (%d),%%sp\n", STACKOFFSET );
output( "\t.byte 0x64\n\tmovl %%edx,(%d)\n", STACKOFFSET );
/* Make %bp point to the previous stackframe (built by CallFrom16) */
output( "\tmovzwl %%sp,%%ebp\n" );
output( "\tleal 0x2a(%%ebp),%%ebp\n"); /* FIELD_OFFSET(STACK16FRAME,bp) */
/* Add the specified offset to the new sp */
output( "\tsubw 0x2c(%%edx), %%sp\n"); /* FIELD_OFFSET(STACK32FRAME,nb_args) */
if (reg_func)
{
/* Push the called routine address */
output( "\tmovl 0x28(%%edx),%%edx\n"); /* FIELD_OFFSET(STACK32FRAME,target) */
output( "\tpushw 0xbc(%%edx)\n"); /* SegCs */
output( "\tpushw 0xb8(%%edx)\n"); /* Eip */
/* Get the registers */
output( "\tpushw 0x98(%%edx)\n"); /* SegDs */
output( "\tpushl 0x94(%%edx)\n"); /* SegEs */
output( "\tpopl %%es\n" );
output( "\tpushl 0x90(%%edx)\n"); /* SegFs */
output( "\tpopl %%fs\n" );
output( "\tpushl 0x8c(%%edx)\n"); /* SegGs */
output( "\tpopl %%gs\n" );
output( "\tmovl 0xb4(%%edx),%%ebp\n"); /* Ebp */
output( "\tmovl 0xa0(%%edx),%%esi\n"); /* Esi */
output( "\tmovl 0x9c(%%edx),%%edi\n"); /* Edi */
output( "\tmovl 0xb0(%%edx),%%eax\n"); /* Eax */
output( "\tmovl 0xa4(%%edx),%%ebx\n"); /* Ebx */
output( "\tmovl 0xac(%%edx),%%ecx\n"); /* Ecx */
output( "\tmovl 0xa8(%%edx),%%edx\n"); /* Edx */
/* Get the 16-bit ds */
output( "\tpopw %%ds\n" );
}
else /* not a register function */
{
/* Push the called routine address */
output( "\tpushl 0x28(%%edx)\n"); /* FIELD_OFFSET(STACK32FRAME,target) */
/* Set %fs and %gs to the value saved by the last CallFrom16 */
output( "\tpushw -22(%%ebp)\n" ); /* FIELD_OFFSET(STACK16FRAME,fs)-FIELD_OFFSET(STACK16FRAME,bp) */
output( "\tpopw %%fs\n" );
output( "\tpushw -20(%%ebp)\n" ); /* FIELD_OFFSET(STACK16FRAME,gs)-FIELD_OFFSET(STACK16FRAME,bp) */
output( "\tpopw %%gs\n" );
/* Set %ds and %es (and %ax just in case) equal to %ss */
output( "\tmovw %%ss,%%ax\n" );
output( "\tmovw %%ax,%%ds\n" );
output( "\tmovw %%ax,%%es\n" );
}
/* Jump to the called routine */
output( "\t.byte 0x66\n" );
output( "\tlret\n" );
/* Function footer */
output_function_size( name );
}
/*******************************************************************
* BuildCallFrom16Core
*
* This routine builds the core routines used in 16->32 thunks:
* CallFrom16Word, CallFrom16Long, CallFrom16Register, and CallFrom16Thunk.
*
* These routines are intended to be called via a far call (with 32-bit
* operand size) from 16-bit code. The 16-bit code stub must push %bp,
* the 32-bit entry point to be called, and the argument conversion
* routine to be used (see stack layout below).
*
* The core routine completes the STACK16FRAME on the 16-bit stack and
* switches to the 32-bit stack. Then, the argument conversion routine
* is called; it gets passed the 32-bit entry point and a pointer to the
* 16-bit arguments (on the 16-bit stack) as parameters. (You can either
* use conversion routines automatically generated by BuildCallFrom16,
* or write your own for special purposes.)
*
* The conversion routine must call the 32-bit entry point, passing it
* the converted arguments, and return its return value to the core.
* After the conversion routine has returned, the core switches back
* to the 16-bit stack, converts the return value to the DX:AX format
* (CallFrom16Long), and returns to the 16-bit call stub. All parameters,
* including %bp, are popped off the stack.
*
* The 16-bit call stub now returns to the caller, popping the 16-bit
* arguments if necessary (pascal calling convention).
*
* In the case of a 'register' function, CallFrom16Register fills a
* CONTEXT86 structure with the values all registers had at the point
* the first instruction of the 16-bit call stub was about to be
* executed. A pointer to this CONTEXT86 is passed as third parameter
* to the argument conversion routine, which typically passes it on
* to the called 32-bit entry point.
*
* CallFrom16Thunk is a special variant used by the implementation of
* the Win95 16->32 thunk functions C16ThkSL and C16ThkSL01 and is
* implemented as follows:
* On entry, the EBX register is set up to contain a flat pointer to the
* 16-bit stack such that EBX+22 points to the first argument.
* Then, the entry point is called, while EBP is set up to point
* to the return address (on the 32-bit stack).
* The called function returns with CX set to the number of bytes
* to be popped of the caller's stack.
*
* Stack layout upon entry to the core routine (STACK16FRAME):
* ... ...
* (sp+24) word first 16-bit arg
* (sp+22) word cs
* (sp+20) word ip
* (sp+18) word bp
* (sp+14) long 32-bit entry point (reused for Win16 mutex recursion count)
* (sp+12) word ip of actual entry point (necessary for relay debugging)
* (sp+8) long relay (argument conversion) function entry point
* (sp+4) long cs of 16-bit entry point
* (sp) long ip of 16-bit entry point
*
* Added on the stack:
* (sp-2) word saved gs
* (sp-4) word saved fs
* (sp-6) word saved es
* (sp-8) word saved ds
* (sp-12) long saved ebp
* (sp-16) long saved ecx
* (sp-20) long saved edx
* (sp-24) long saved previous stack
*/
static void BuildCallFrom16Core( int reg_func, int thunk )
{
/* Function header */
if (thunk) function_header( "__wine_call_from_16_thunk" );
else if (reg_func) function_header( "__wine_call_from_16_regs" );
else function_header( "__wine_call_from_16" );
/* Create STACK16FRAME (except STACK32FRAME link) */
output( "\tpushw %%gs\n" );
output( "\tpushw %%fs\n" );
output( "\tpushw %%es\n" );
output( "\tpushw %%ds\n" );
output( "\tpushl %%ebp\n" );
output( "\tpushl %%ecx\n" );
output( "\tpushl %%edx\n" );
/* Save original EFlags register */
if (reg_func) output( "\tpushfl\n" );
if ( UsePIC )
{
output( "\tcall 1f\n" );
output( "1:\tpopl %%ecx\n" );
output( "\t.byte 0x2e\n\tmovl %s-1b(%%ecx),%%edx\n", asm_name("CallTo16_DataSelector") );
}
else
output( "\t.byte 0x2e\n\tmovl %s,%%edx\n", asm_name("CallTo16_DataSelector") );
/* Load 32-bit segment registers */
output( "\tmovw %%dx, %%ds\n" );
output( "\tmovw %%dx, %%es\n" );
if ( UsePIC )
output( "\tmovw %s-1b(%%ecx), %%fs\n", asm_name("CallTo16_TebSelector") );
else
output( "\tmovw %s, %%fs\n", asm_name("CallTo16_TebSelector") );
output( "\t.byte 0x64\n\tmov (%d),%%gs\n", GS_OFFSET );
/* Translate STACK16FRAME base to flat offset in %edx */
output( "\tmovw %%ss, %%dx\n" );
output( "\tandl $0xfff8, %%edx\n" );
output( "\tshrl $1, %%edx\n" );
if (UsePIC)
{
output( "\taddl wine_ldt_copy_ptr-1b(%%ecx),%%edx\n" );
output( "\tmovl (%%edx), %%edx\n" );
}
else
output( "\tmovl %s(%%edx), %%edx\n", asm_name("wine_ldt_copy") );
output( "\tmovzwl %%sp, %%ebp\n" );
output( "\tleal %d(%%ebp,%%edx), %%edx\n", reg_func ? 0 : -4 );
/* Get saved flags into %ecx */
if (reg_func) output( "\tpopl %%ecx\n" );
/* Get the 32-bit stack pointer from the TEB and complete STACK16FRAME */
output( "\t.byte 0x64\n\tmovl (%d), %%ebp\n", STACKOFFSET );
output( "\tpushl %%ebp\n" );
/* Switch stacks */
output( "\t.byte 0x64\n\tmovw %%ss, (%d)\n", STACKOFFSET + 2 );
output( "\t.byte 0x64\n\tmovw %%sp, (%d)\n", STACKOFFSET );
output( "\tpushl %%ds\n" );
output( "\tpopl %%ss\n" );
output( "\tmovl %%ebp, %%esp\n" );
output( "\taddl $0x20,%%ebp\n"); /* FIELD_OFFSET(STACK32FRAME,ebp) */
/* At this point:
STACK16FRAME is completely set up
DS, ES, SS: flat data segment
FS: current TEB
ESP: points to last STACK32FRAME
EBP: points to ebp member of last STACK32FRAME
EDX: points to current STACK16FRAME
ECX: contains saved flags
all other registers: unchanged */
/* Special case: C16ThkSL stub */
if ( thunk )
{
/* Set up registers as expected and call thunk */
output( "\tleal 0x1a(%%edx),%%ebx\n" ); /* sizeof(STACK16FRAME)-22 */
output( "\tleal -4(%%esp), %%ebp\n" );
output( "\tcall *0x26(%%edx)\n"); /* FIELD_OFFSET(STACK16FRAME,entry_point) */
/* Switch stack back */
output( "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
output( "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
output( "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Restore registers and return directly to caller */
output( "\taddl $8, %%esp\n" );
output( "\tpopl %%ebp\n" );
output( "\tpopw %%ds\n" );
output( "\tpopw %%es\n" );
output( "\tpopw %%fs\n" );
output( "\tpopw %%gs\n" );
output( "\taddl $20, %%esp\n" );
output( "\txorb %%ch, %%ch\n" );
output( "\tpopl %%ebx\n" );
output( "\taddw %%cx, %%sp\n" );
output( "\tpush %%ebx\n" );
output( "\t.byte 0x66\n" );
output( "\tlret\n" );
output_function_size( "__wine_call_from_16_thunk" );
return;
}
/* Build register CONTEXT */
if ( reg_func )
{
output( "\tsubl $0x2cc,%%esp\n" ); /* sizeof(CONTEXT86) */
output( "\tmovl %%ecx,0xc0(%%esp)\n" ); /* EFlags */
output( "\tmovl %%eax,0xb0(%%esp)\n" ); /* Eax */
output( "\tmovl %%ebx,0xa4(%%esp)\n" ); /* Ebx */
output( "\tmovl %%esi,0xa0(%%esp)\n" ); /* Esi */
output( "\tmovl %%edi,0x9c(%%esp)\n" ); /* Edi */
output( "\tmovl 0x0c(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,ebp) */
output( "\tmovl %%eax,0xb4(%%esp)\n" ); /* Ebp */
output( "\tmovl 0x08(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,ecx) */
output( "\tmovl %%eax,0xac(%%esp)\n" ); /* Ecx */
output( "\tmovl 0x04(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,edx) */
output( "\tmovl %%eax,0xa8(%%esp)\n" ); /* Edx */
output( "\tmovzwl 0x10(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,ds) */
output( "\tmovl %%eax,0x98(%%esp)\n" ); /* SegDs */
output( "\tmovzwl 0x12(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,es) */
output( "\tmovl %%eax,0x94(%%esp)\n" ); /* SegEs */
output( "\tmovzwl 0x14(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,fs) */
output( "\tmovl %%eax,0x90(%%esp)\n" ); /* SegFs */
output( "\tmovzwl 0x16(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,gs) */
output( "\tmovl %%eax,0x8c(%%esp)\n" ); /* SegGs */
output( "\tmovzwl 0x2e(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,cs) */
output( "\tmovl %%eax,0xbc(%%esp)\n" ); /* SegCs */
output( "\tmovzwl 0x2c(%%edx),%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,ip) */
output( "\tmovl %%eax,0xb8(%%esp)\n" ); /* Eip */
output( "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET+2 );
output( "\tmovl %%eax,0xc8(%%esp)\n" ); /* SegSs */
output( "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET );
output( "\taddl $0x2c,%%eax\n"); /* FIELD_OFFSET(STACK16FRAME,ip) */
output( "\tmovl %%eax,0xc4(%%esp)\n" ); /* Esp */
#if 0
output( "\tfsave 0x1c(%%esp)\n" ); /* FloatSave */
#endif
/* Push address of CONTEXT86 structure -- popped by the relay routine */
output( "\tmovl %%esp,%%eax\n" );
output( "\tandl $~15,%%esp\n" );
output( "\tsubl $4,%%esp\n" );
output( "\tpushl %%eax\n" );
}
else
{
output( "\tsubl $8,%%esp\n" );
output( "\tandl $~15,%%esp\n" );
output( "\taddl $8,%%esp\n" );
}
/* Call relay routine (which will call the API entry point) */
output( "\tleal 0x30(%%edx),%%eax\n" ); /* sizeof(STACK16FRAME) */
output( "\tpushl %%eax\n" );
output( "\tpushl 0x26(%%edx)\n"); /* FIELD_OFFSET(STACK16FRAME,entry_point) */
output( "\tcall *0x20(%%edx)\n"); /* FIELD_OFFSET(STACK16FRAME,relay) */
if ( reg_func )
{
output( "\tleal -748(%%ebp),%%ebx\n" ); /* sizeof(CONTEXT) + FIELD_OFFSET(STACK32FRAME,ebp) */
/* Switch stack back */
output( "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
output( "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
output( "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Get return address to CallFrom16 stub */
output( "\taddw $0x14,%%sp\n" ); /* FIELD_OFFSET(STACK16FRAME,callfrom_ip)-4 */
output( "\tpopl %%eax\n" );
output( "\tpopl %%edx\n" );
/* Restore all registers from CONTEXT */
output( "\tmovw 0xc8(%%ebx),%%ss\n"); /* SegSs */
output( "\tmovl 0xc4(%%ebx),%%esp\n"); /* Esp */
output( "\taddl $4, %%esp\n" ); /* room for final return address */
output( "\tpushw 0xbc(%%ebx)\n"); /* SegCs */
output( "\tpushw 0xb8(%%ebx)\n"); /* Eip */
output( "\tpushl %%edx\n" );
output( "\tpushl %%eax\n" );
output( "\tpushl 0xc0(%%ebx)\n"); /* EFlags */
output( "\tpushl 0x98(%%ebx)\n"); /* SegDs */
output( "\tpushl 0x94(%%ebx)\n"); /* SegEs */
output( "\tpopl %%es\n" );
output( "\tpushl 0x90(%%ebx)\n"); /* SegFs */
output( "\tpopl %%fs\n" );
output( "\tpushl 0x8c(%%ebx)\n"); /* SegGs */
output( "\tpopl %%gs\n" );
output( "\tmovl 0xb4(%%ebx),%%ebp\n"); /* Ebp */
output( "\tmovl 0xa0(%%ebx),%%esi\n"); /* Esi */
output( "\tmovl 0x9c(%%ebx),%%edi\n"); /* Edi */
output( "\tmovl 0xb0(%%ebx),%%eax\n"); /* Eax */
output( "\tmovl 0xa8(%%ebx),%%edx\n"); /* Edx */
output( "\tmovl 0xac(%%ebx),%%ecx\n"); /* Ecx */
output( "\tmovl 0xa4(%%ebx),%%ebx\n"); /* Ebx */
output( "\tpopl %%ds\n" );
output( "\tpopfl\n" );
output( "\tlret\n" );
output_function_size( "__wine_call_from_16_regs" );
}
else
{
/* Switch stack back */
output( "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
output( "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
output( "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Restore registers */
output( "\tpopl %%edx\n" );
output( "\tpopl %%ecx\n" );
output( "\tpopl %%ebp\n" );
output( "\tpopw %%ds\n" );
output( "\tpopw %%es\n" );
output( "\tpopw %%fs\n" );
output( "\tpopw %%gs\n" );
/* Return to return stub which will return to caller */
output( "\tlret $12\n" );
output_function_size( "__wine_call_from_16" );
}
}
/*******************************************************************
* BuildCallFrom32Regs
*
* Build a 32-bit-to-Wine call-back function for a 'register' function.
* 'args' is the number of dword arguments.
*
* Stack layout:
* ...
* (ebp+20) first arg
* (ebp+16) ret addr to user code
* (ebp+12) func to call
* (ebp+8) number of args
* (ebp+4) ret addr to relay code
* (ebp+0) saved ebp
* (ebp-128) buffer area to allow stack frame manipulation
* (ebp-332) CONTEXT86 struct
* (ebp-336) CONTEXT86 *argument
* .... other arguments copied from (ebp+12)
*
* The entry point routine is called with a CONTEXT* extra argument,
* following the normal args. In this context structure, EIP_reg
* contains the return address to user code, and ESP_reg the stack
* pointer on return (with the return address and arguments already
* removed).
*/
static void BuildCallFrom32Regs( FILE *outfile )
{
static const int STACK_SPACE = 128 + sizeof(CONTEXT86);
/* Function header */
function_header( outfile, "__wine_call_from_32_regs" );
/* Allocate some buffer space on the stack */
fprintf( outfile, "\tpushl %%ebp\n" );
fprintf( outfile, "\tmovl %%esp,%%ebp\n ");
fprintf( outfile, "\tleal -%d(%%esp), %%esp\n", STACK_SPACE );
/* Build the context structure */
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eax) - STACK_SPACE );
fprintf( outfile, "\tpushfl\n" );
fprintf( outfile, "\tpopl %%eax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(EFlags) - STACK_SPACE );
fprintf( outfile, "\tmovl 0(%%ebp),%%eax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Ebp) - STACK_SPACE );
fprintf( outfile, "\tmovl %%ebx,%d(%%ebp)\n", CONTEXTOFFSET(Ebx) - STACK_SPACE );
fprintf( outfile, "\tmovl %%ecx,%d(%%ebp)\n", CONTEXTOFFSET(Ecx) - STACK_SPACE );
fprintf( outfile, "\tmovl %%edx,%d(%%ebp)\n", CONTEXTOFFSET(Edx) - STACK_SPACE );
fprintf( outfile, "\tmovl %%esi,%d(%%ebp)\n", CONTEXTOFFSET(Esi) - STACK_SPACE );
fprintf( outfile, "\tmovl %%edi,%d(%%ebp)\n", CONTEXTOFFSET(Edi) - STACK_SPACE );
fprintf( outfile, "\txorl %%eax,%%eax\n" );
fprintf( outfile, "\tmovw %%cs,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegCs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%es,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegEs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%fs,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegFs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%gs,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegGs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%ss,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegSs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%ds,%%ax\n" );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegDs) - STACK_SPACE );
fprintf( outfile, "\tmovw %%ax,%%es\n" ); /* set %es equal to %ds just in case */
fprintf( outfile, "\tmovl $0x%x,%%eax\n", CONTEXT86_FULL );
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(ContextFlags) - STACK_SPACE );
fprintf( outfile, "\tmovl 16(%%ebp),%%eax\n" ); /* Get %eip at time of call */
fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eip) - STACK_SPACE );
/* Transfer the arguments */
fprintf( outfile, "\tmovl 8(%%ebp),%%ecx\n" ); /* fetch number of args to copy */
fprintf( outfile, "\tleal 4(,%%ecx,4),%%edx\n" ); /* add context arg */
fprintf( outfile, "\tsubl %%edx,%%esp\n" ); /* update stack pointer to create room for
the copy of the args */
fprintf( outfile, "\tandl $~15,%%esp\n" ); /* and align it */
fprintf( outfile, "\tleal 20(%%ebp),%%esi\n" ); /* get %esp at time of call to get original args */
fprintf( outfile, "\tmovl %%esp,%%edi\n" ); /* get destination for args */
fprintf( outfile, "\ttest %%ecx,%%ecx\n" ); /* check if we have any args to copy */
fprintf( outfile, "\tjz 1f\n" );
fprintf( outfile, "\tcld\n" );
fprintf( outfile, "\trep\n\tmovsl\n" ); /* copy args */
fprintf( outfile, "1:\tleal %d(%%ebp),%%eax\n", -STACK_SPACE ); /* Get CONTEXT location */
fprintf( outfile, "\tmovl %%eax,(%%edi)\n" ); /* Put pointer to it as parameter */
fprintf( outfile, "\tmovl %%esi,%d(%%ebp)\n", CONTEXTOFFSET(Esp) - STACK_SPACE );
/* Call the entry point */
fprintf( outfile, "\tmovl 4(%%ebp),%%eax\n" ); /* get relay code addr */
fprintf( outfile, "\taddl 12(%%ebp),%%eax\n" ); /* add offset to function to call, since it's passed
int as a relative address instead of absolute */
fprintf( outfile, "\tcall *%%eax\n" );
fprintf( outfile, "\tleal -%d(%%ebp),%%ebx\n", STACK_SPACE ); /* Stick pointer to the CONTEXT86
in ebx for ease of reading */
/* Restore all registers from CONTEXT */
fprintf( outfile, "2:\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegEs) );
fprintf( outfile, "\tpopl %%es\n" );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegFs) );
fprintf( outfile, "\tpopl %%fs\n" );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegGs) );
fprintf( outfile, "\tpopl %%gs\n" );
fprintf( outfile, "\tmovl %d(%%ebx),%%edi\n", CONTEXTOFFSET(Edi) );
fprintf( outfile, "\tmovl %d(%%ebx),%%esi\n", CONTEXTOFFSET(Esi) );
fprintf( outfile, "\tmovl %d(%%ebx),%%edx\n", CONTEXTOFFSET(Edx) );
fprintf( outfile, "\tmovl %d(%%ebx),%%ecx\n", CONTEXTOFFSET(Ecx) );
fprintf( outfile, "\tmovl %d(%%ebx),%%eax\n", CONTEXTOFFSET(Eax) );
fprintf( outfile, "\tmovl %d(%%ebx),%%ebp\n", CONTEXTOFFSET(Ebp) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegSs) );
fprintf( outfile, "\tpopl %%ss\n" );
fprintf( outfile, "\tmovl %d(%%ebx),%%esp\n", CONTEXTOFFSET(Esp) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(EFlags) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegCs) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(Eip) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegDs) );
fprintf( outfile, "\tmovl %d(%%ebx),%%ebx\n", CONTEXTOFFSET(Ebx) );
fprintf( outfile, "\tpopl %%ds\n" );
fprintf( outfile, "\tiret\n" );
/* This entrypoint is called from dlls/ntdll/signal_i386.c as the cleanup after
handling an exception, since it also needs thread state restored from a CONTEXT86
structure on the stack. However, the stack layout's different than
__wine_call_from_32_regs, so we need to do a different adjustment to find the
CONTEXT86 structure */
function_header( outfile, "__wine_ret_to_32_regs" );
/* don't use ebp for offsets, as we'll get a stack fault when we set
%ss if it's a different value from the current one; ebx is safe, as
we don't reset %ds until right at the end */
fprintf( outfile, "\tleal 4(%%esp),%%ebx\n" );
fprintf( outfile, "\tjmp 2b\n" );
}
/*******************************************************************
* BuildCallTo16Core
*
* This routine builds the core routines used in 32->16 thunks:
*
* extern void WINAPI wine_call_to_16_word( SEGPTR target, int nb_args );
* extern void WINAPI wine_call_to_16_long( SEGPTR target, int nb_args );
* extern void WINAPI wine_call_to_16_regs_short( const CONTEXT86 *context, int nb_args );
* extern void WINAPI wine_call_to_16_regs_long ( const CONTEXT86 *context, int nb_args );
*
* These routines can be called directly from 32-bit code.
*
* All routines expect that the 16-bit stack contents (arguments) were
* already set up by the caller; nb_args must contain the number of bytes
* to be conserved. The 16-bit SS:SP will be set accordinly.
*
* All other registers are either taken from the CONTEXT86 structure
* or else set to default values. The target routine address is either
* given directly or taken from the CONTEXT86.
*
* If you want to call a 16-bit routine taking only standard argument types
* (WORD and LONG), you can also have an appropriate argument conversion
* stub automatically generated (see BuildCallTo16); you'd then call this
* stub, which in turn would prepare the 16-bit stack and call the appropiate
* core routine.
*
*/
static void BuildCallTo16Core( FILE *outfile, int short_ret, int reg_func )
{
char *name = reg_func == 2 ? "regs_long" :
reg_func == 1 ? "regs_short" :
short_ret? "word" : "long";
/* Function header */
if (reg_func == 2) function_header( outfile, "wine_call_to_16_regs_long" );
else if (reg_func == 1) function_header( outfile, "wine_call_to_16_regs_short" );
else if (short_ret) function_header( outfile, "wine_call_to_16_word" );
else function_header( outfile, "wine_call_to_16_long" );
/* Function entry sequence */
fprintf( outfile, "\tpushl %%ebp\n" );
fprintf( outfile, "\tmovl %%esp, %%ebp\n" );
/* Save the 32-bit registers */
fprintf( outfile, "\tpushl %%ebx\n" );
fprintf( outfile, "\tpushl %%ecx\n" );
fprintf( outfile, "\tpushl %%edx\n" );
fprintf( outfile, "\tpushl %%esi\n" );
fprintf( outfile, "\tpushl %%edi\n" );
if ( UsePIC )
{
fprintf( outfile, "\tcall 1f\n" );
fprintf( outfile, "1:\tpopl %%ebx\n" );
}
/* Enter Win16 Mutex */
fprintf( outfile, "\tcall " PREFIX "_EnterWin16Lock\n" );
/* Print debugging info */
if (debugging)
{
/* Push flags, number of arguments, and target */
fprintf( outfile, "\tpushl $%d\n", reg_func );
fprintf( outfile, "\tpushl 12(%%ebp)\n" );
fprintf( outfile, "\tpushl 8(%%ebp)\n" );
fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16\n" );
fprintf( outfile, "\taddl $12, %%esp\n" );
}
/* Get return address */
if ( UsePIC )
fprintf( outfile, "\tmovl " PREFIX "CallTo16_RetAddr-1b(%%ebx), %%ecx\n" );
else
fprintf( outfile, "\tmovl " PREFIX "CallTo16_RetAddr, %%ecx\n" );
/* Call the actual CallTo16 routine (simulate a lcall) */
fprintf( outfile, "\tpushl %%cs\n" );
fprintf( outfile, "\tcall .Lwine_call_to_16_%s\n", name );
if ( !reg_func )
{
/* Convert and push return value */
if ( short_ret )
{
fprintf( outfile, "\tmovzwl %%ax, %%eax\n" );
fprintf( outfile, "\tpushl %%eax\n" );
}
else
{
fprintf( outfile, "\tshll $16,%%edx\n" );
fprintf( outfile, "\tmovw %%ax,%%dx\n" );
fprintf( outfile, "\tpushl %%edx\n" );
}
}
else
{
/*
* Modify CONTEXT86 structure to contain new values
*
* NOTE: We restore only EAX, EBX, EDX, EDX, EBP, and ESP.
* The segment registers as well as ESI and EDI should
* not be modified by a well-behaved 16-bit routine in
* any case. [If necessary, we could restore them as well,
* at the cost of a somewhat less efficient return path.]
*/
fprintf( outfile, "\tmovl %d(%%esp), %%edi\n", STACK32OFFSET(target)-12 );
fprintf( outfile, "\tmovl %%eax, %d(%%edi)\n", CONTEXTOFFSET(Eax) );
fprintf( outfile, "\tmovl %%ebx, %d(%%edi)\n", CONTEXTOFFSET(Ebx) );
fprintf( outfile, "\tmovl %%ecx, %d(%%edi)\n", CONTEXTOFFSET(Ecx) );
fprintf( outfile, "\tmovl %%edx, %d(%%edi)\n", CONTEXTOFFSET(Edx) );
fprintf( outfile, "\tmovl %%ebp, %d(%%edi)\n", CONTEXTOFFSET(Ebp) );
fprintf( outfile, "\tmovl %%esi, %d(%%edi)\n", CONTEXTOFFSET(Esp) );
/* The return glue code saved %esp into %esi */
fprintf( outfile, "\tpushl %%edi\n" );
}
/* Print debugging info */
if (debugging)
{
fprintf( outfile, "\tpushl $%d\n", reg_func );
fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16Ret\n" );
fprintf( outfile, "\taddl $4, %%esp\n" );
}
/* Leave Win16 Mutex */
fprintf( outfile, "\tcall " PREFIX "_LeaveWin16Lock\n" );
/* Get return value */
fprintf( outfile, "\tpopl %%eax\n" );
/* Restore the 32-bit registers */
fprintf( outfile, "\tpopl %%edi\n" );
fprintf( outfile, "\tpopl %%esi\n" );
fprintf( outfile, "\tpopl %%edx\n" );
fprintf( outfile, "\tpopl %%ecx\n" );
fprintf( outfile, "\tpopl %%ebx\n" );
/* Function exit sequence */
fprintf( outfile, "\tpopl %%ebp\n" );
fprintf( outfile, "\tret $8\n" );
/* Start of the actual CallTo16 routine */
fprintf( outfile, ".Lwine_call_to_16_%s:\n", name );
/* Complete STACK32FRAME */
fprintf( outfile, "\t.byte 0x64\n\tpushl (%d)\n", STACKOFFSET );
fprintf( outfile, "\tmovl %%esp,%%edx\n" );
/* Switch to the 16-bit stack */
#ifdef __svr4__
fprintf( outfile,"\tdata16\n");
#endif
fprintf( outfile, "\t.byte 0x64\n\tmovw (%d),%%ss\n", STACKOFFSET + 2);
fprintf( outfile, "\t.byte 0x64\n\tmovw (%d),%%sp\n", STACKOFFSET );
fprintf( outfile, "\t.byte 0x64\n\tmovl %%edx,(%d)\n", STACKOFFSET );
/* Make %bp point to the previous stackframe (built by CallFrom16) */
fprintf( outfile, "\tmovzwl %%sp,%%ebp\n" );
fprintf( outfile, "\tleal %d(%%ebp),%%ebp\n", STACK16OFFSET(bp) );
/* Add the specified offset to the new sp */
fprintf( outfile, "\tsubw %d(%%edx), %%sp\n", STACK32OFFSET(nb_args) );
/* Push the return address
* With sreg suffix, we push 16:16 address (normal lret)
* With lreg suffix, we push 16:32 address (0x66 lret, for KERNEL32_45)
*/
if (reg_func != 2)
fprintf( outfile, "\tpushl %%ecx\n" );
else
{
fprintf( outfile, "\tshldl $16, %%ecx, %%eax\n" );
fprintf( outfile, "\tpushw $0\n" );
fprintf( outfile, "\tpushw %%ax\n" );
fprintf( outfile, "\tpushw $0\n" );
fprintf( outfile, "\tpushw %%cx\n" );
}
if (reg_func)
{
/* Push the called routine address */
fprintf( outfile, "\tmovl %d(%%edx),%%edx\n", STACK32OFFSET(target) );
fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegCs) );
fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(Eip) );
/* Get the registers */
fprintf( outfile, "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegDs) );
fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(SegEs) );
fprintf( outfile, "\tmovw %%ax,%%es\n" );
fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(SegFs) );
fprintf( outfile, "\tmovw %%ax,%%fs\n" );
fprintf( outfile, "\tmovl %d(%%edx),%%ebp\n", CONTEXTOFFSET(Ebp) );
fprintf( outfile, "\tmovl %d(%%edx),%%esi\n", CONTEXTOFFSET(Esi) );
fprintf( outfile, "\tmovl %d(%%edx),%%edi\n", CONTEXTOFFSET(Edi) );
fprintf( outfile, "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(Eax) );
fprintf( outfile, "\tmovl %d(%%edx),%%ebx\n", CONTEXTOFFSET(Ebx) );
fprintf( outfile, "\tmovl %d(%%edx),%%ecx\n", CONTEXTOFFSET(Ecx) );
fprintf( outfile, "\tmovl %d(%%edx),%%edx\n", CONTEXTOFFSET(Edx) );
/* Get the 16-bit ds */
fprintf( outfile, "\tpopw %%ds\n" );
}
else /* not a register function */
{
/* Push the called routine address */
fprintf( outfile, "\tpushl %d(%%edx)\n", STACK32OFFSET(target) );
/* Set %fs to the value saved by the last CallFrom16 */
fprintf( outfile, "\tmovw %d(%%ebp),%%ax\n", STACK16OFFSET(fs)-STACK16OFFSET(bp) );
fprintf( outfile, "\tmovw %%ax,%%fs\n" );
/* Set %ds and %es (and %ax just in case) equal to %ss */
fprintf( outfile, "\tmovw %%ss,%%ax\n" );
fprintf( outfile, "\tmovw %%ax,%%ds\n" );
fprintf( outfile, "\tmovw %%ax,%%es\n" );
}
/* Jump to the called routine */
fprintf( outfile, "\t.byte 0x66\n" );
fprintf( outfile, "\tlret\n" );
}
/*******************************************************************
* BuildCallFrom16Core
*
* This routine builds the core routines used in 16->32 thunks:
* CallFrom16Word, CallFrom16Long, CallFrom16Register, and CallFrom16Thunk.
*
* These routines are intended to be called via a far call (with 32-bit
* operand size) from 16-bit code. The 16-bit code stub must push %bp,
* the 32-bit entry point to be called, and the argument conversion
* routine to be used (see stack layout below).
*
* The core routine completes the STACK16FRAME on the 16-bit stack and
* switches to the 32-bit stack. Then, the argument conversion routine
* is called; it gets passed the 32-bit entry point and a pointer to the
* 16-bit arguments (on the 16-bit stack) as parameters. (You can either
* use conversion routines automatically generated by BuildCallFrom16,
* or write your own for special purposes.)
*
* The conversion routine must call the 32-bit entry point, passing it
* the converted arguments, and return its return value to the core.
* After the conversion routine has returned, the core switches back
* to the 16-bit stack, converts the return value to the DX:AX format
* (CallFrom16Long), and returns to the 16-bit call stub. All parameters,
* including %bp, are popped off the stack.
*
* The 16-bit call stub now returns to the caller, popping the 16-bit
* arguments if necessary (pascal calling convention).
*
* In the case of a 'register' function, CallFrom16Register fills a
* CONTEXT86 structure with the values all registers had at the point
* the first instruction of the 16-bit call stub was about to be
* executed. A pointer to this CONTEXT86 is passed as third parameter
* to the argument conversion routine, which typically passes it on
* to the called 32-bit entry point.
*
* CallFrom16Thunk is a special variant used by the implementation of
* the Win95 16->32 thunk functions C16ThkSL and C16ThkSL01 and is
* implemented as follows:
* On entry, the EBX register is set up to contain a flat pointer to the
* 16-bit stack such that EBX+22 points to the first argument.
* Then, the entry point is called, while EBP is set up to point
* to the return address (on the 32-bit stack).
* The called function returns with CX set to the number of bytes
* to be popped of the caller's stack.
*
* Stack layout upon entry to the core routine (STACK16FRAME):
* ... ...
* (sp+24) word first 16-bit arg
* (sp+22) word cs
* (sp+20) word ip
* (sp+18) word bp
* (sp+14) long 32-bit entry point (reused for Win16 mutex recursion count)
* (sp+12) word ip of actual entry point (necessary for relay debugging)
* (sp+8) long relay (argument conversion) function entry point
* (sp+4) long cs of 16-bit entry point
* (sp) long ip of 16-bit entry point
*
* Added on the stack:
* (sp-2) word saved gs
* (sp-4) word saved fs
* (sp-6) word saved es
* (sp-8) word saved ds
* (sp-12) long saved ebp
* (sp-16) long saved ecx
* (sp-20) long saved edx
* (sp-24) long saved previous stack
*/
static void BuildCallFrom16Core( FILE *outfile, int reg_func, int thunk, int short_ret )
{
/* Function header */
if (thunk) function_header( outfile, "__wine_call_from_16_thunk" );
else if (reg_func) function_header( outfile, "__wine_call_from_16_regs" );
else if (short_ret) function_header( outfile, "__wine_call_from_16_word" );
else function_header( outfile, "__wine_call_from_16_long" );
/* Create STACK16FRAME (except STACK32FRAME link) */
fprintf( outfile, "\tpushw %%gs\n" );
fprintf( outfile, "\tpushw %%fs\n" );
fprintf( outfile, "\tpushw %%es\n" );
fprintf( outfile, "\tpushw %%ds\n" );
fprintf( outfile, "\tpushl %%ebp\n" );
fprintf( outfile, "\tpushl %%ecx\n" );
fprintf( outfile, "\tpushl %%edx\n" );
/* Save original EFlags register */
fprintf( outfile, "\tpushfl\n" );
if ( UsePIC )
{
/* Get Global Offset Table into %ecx */
fprintf( outfile, "\tcall 1f\n" );
fprintf( outfile, "1:\tpopl %%ecx\n" );
}
if (UsePIC)
fprintf( outfile, "\t.byte 0x2e\n\tmovl " PREFIX "CallTo16_DataSelector-1b(%%ecx),%%edx\n" );
else
fprintf( outfile, "\t.byte 0x2e\n\tmovl " PREFIX "CallTo16_DataSelector,%%edx\n" );
/* Load 32-bit segment registers */
#ifdef __svr4__
fprintf( outfile, "\tdata16\n");
#endif
fprintf( outfile, "\tmovw %%dx, %%ds\n" );
#ifdef __svr4__
fprintf( outfile, "\tdata16\n");
#endif
fprintf( outfile, "\tmovw %%dx, %%es\n" );
if ( UsePIC )
fprintf( outfile, "\tmovw " PREFIX "SYSLEVEL_Win16CurrentTeb-1b(%%ecx), %%fs\n" );
else
fprintf( outfile, "\tmovw " PREFIX "SYSLEVEL_Win16CurrentTeb, %%fs\n" );
/* Get address of wine_ldt_copy array into %ecx */
if ( UsePIC )
fprintf( outfile, "\tmovl wine_ldt_copy_ptr-1b(%%ecx), %%ecx\n" );
else
fprintf( outfile, "\tmovl $" PREFIX "wine_ldt_copy, %%ecx\n" );
/* Translate STACK16FRAME base to flat offset in %edx */
fprintf( outfile, "\tmovw %%ss, %%dx\n" );
fprintf( outfile, "\tandl $0xfff8, %%edx\n" );
fprintf( outfile, "\tshrl $1, %%edx\n" );
fprintf( outfile, "\tmovl (%%ecx,%%edx), %%edx\n" );
fprintf( outfile, "\tmovzwl %%sp, %%ebp\n" );
fprintf( outfile, "\tleal (%%ebp,%%edx), %%edx\n" );
/* Get saved flags into %ecx */
fprintf( outfile, "\tpopl %%ecx\n" );
/* Get the 32-bit stack pointer from the TEB and complete STACK16FRAME */
fprintf( outfile, "\t.byte 0x64\n\tmovl (%d), %%ebp\n", STACKOFFSET );
fprintf( outfile, "\tpushl %%ebp\n" );
/* Switch stacks */
#ifdef __svr4__
fprintf( outfile,"\tdata16\n");
#endif
fprintf( outfile, "\t.byte 0x64\n\tmovw %%ss, (%d)\n", STACKOFFSET + 2 );
fprintf( outfile, "\t.byte 0x64\n\tmovw %%sp, (%d)\n", STACKOFFSET );
fprintf( outfile, "\tpushl %%ds\n" );
fprintf( outfile, "\tpopl %%ss\n" );
fprintf( outfile, "\tmovl %%ebp, %%esp\n" );
fprintf( outfile, "\taddl $%d, %%ebp\n", STRUCTOFFSET(STACK32FRAME, ebp) );
/* At this point:
STACK16FRAME is completely set up
DS, ES, SS: flat data segment
FS: current TEB
ESP: points to last STACK32FRAME
EBP: points to ebp member of last STACK32FRAME
EDX: points to current STACK16FRAME
ECX: contains saved flags
all other registers: unchanged */
/* Special case: C16ThkSL stub */
if ( thunk )
{
/* Set up registers as expected and call thunk */
fprintf( outfile, "\tleal %lu(%%edx), %%ebx\n", sizeof(STACK16FRAME)-22 );
fprintf( outfile, "\tleal -4(%%esp), %%ebp\n" );
fprintf( outfile, "\tcall *%d(%%edx)\n", STACK16OFFSET(entry_point) );
/* Switch stack back */
fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Restore registers and return directly to caller */
fprintf( outfile, "\taddl $8, %%esp\n" );
fprintf( outfile, "\tpopl %%ebp\n" );
fprintf( outfile, "\tpopw %%ds\n" );
fprintf( outfile, "\tpopw %%es\n" );
fprintf( outfile, "\tpopw %%fs\n" );
fprintf( outfile, "\tpopw %%gs\n" );
fprintf( outfile, "\taddl $20, %%esp\n" );
fprintf( outfile, "\txorb %%ch, %%ch\n" );
fprintf( outfile, "\tpopl %%ebx\n" );
fprintf( outfile, "\taddw %%cx, %%sp\n" );
fprintf( outfile, "\tpush %%ebx\n" );
fprintf( outfile, "\t.byte 0x66\n" );
fprintf( outfile, "\tlret\n" );
return;
}
/* Build register CONTEXT */
if ( reg_func )
{
fprintf( outfile, "\tsubl $%lu, %%esp\n", sizeof(CONTEXT86) );
fprintf( outfile, "\tmovl %%ecx, %d(%%esp)\n", CONTEXTOFFSET(EFlags) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Eax) );
fprintf( outfile, "\tmovl %%ebx, %d(%%esp)\n", CONTEXTOFFSET(Ebx) );
fprintf( outfile, "\tmovl %%esi, %d(%%esp)\n", CONTEXTOFFSET(Esi) );
fprintf( outfile, "\tmovl %%edi, %d(%%esp)\n", CONTEXTOFFSET(Edi) );
fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(ebp) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Ebp) );
fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(ecx) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Ecx) );
fprintf( outfile, "\tmovl %d(%%edx), %%eax\n", STACK16OFFSET(edx) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Edx) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(ds) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegDs) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(es) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegEs) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(fs) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegFs) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(gs) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegGs) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(cs) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegCs) );
fprintf( outfile, "\tmovzwl %d(%%edx), %%eax\n", STACK16OFFSET(ip) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Eip) );
fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET+2 );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(SegSs) );
fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%eax\n", STACKOFFSET );
fprintf( outfile, "\taddl $%d, %%eax\n", STACK16OFFSET(ip) );
fprintf( outfile, "\tmovl %%eax, %d(%%esp)\n", CONTEXTOFFSET(Esp) );
#if 0
fprintf( outfile, "\tfsave %d(%%esp)\n", CONTEXTOFFSET(FloatSave) );
#endif
/* Push address of CONTEXT86 structure -- popped by the relay routine */
fprintf( outfile, "\tpushl %%esp\n" );
}
/* Print debug info before call */
if ( debugging )
{
fprintf( outfile, "\tpushl %%edx\n" );
if ( reg_func )
fprintf( outfile, "\tleal -%lu(%%ebp), %%eax\n\tpushl %%eax\n",
sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) );
else
fprintf( outfile, "\tpushl $0\n" );
fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16\n ");
fprintf( outfile, "\tpopl %%edx\n" );
fprintf( outfile, "\tpopl %%edx\n" );
}
/* Call relay routine (which will call the API entry point) */
fprintf( outfile, "\tleal %lu(%%edx), %%eax\n", sizeof(STACK16FRAME) );
fprintf( outfile, "\tpushl %%eax\n" );
fprintf( outfile, "\tpushl %d(%%edx)\n", STACK16OFFSET(entry_point) );
fprintf( outfile, "\tcall *%d(%%edx)\n", STACK16OFFSET(relay) );
/* Print debug info after call */
if ( debugging )
{
fprintf( outfile, "\tpushl %%eax\n" );
if ( reg_func )
fprintf( outfile, "\tleal -%lu(%%ebp), %%eax\n\tpushl %%eax\n",
sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) );
else
fprintf( outfile, "\tpushl $0\n" );
fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16Ret\n ");
fprintf( outfile, "\tpopl %%eax\n" );
fprintf( outfile, "\tpopl %%eax\n" );
}
if ( reg_func )
{
fprintf( outfile, "\tmovl %%esp, %%ebx\n" );
/* Switch stack back */
fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Get return address to CallFrom16 stub */
fprintf( outfile, "\taddw $%d, %%sp\n", STACK16OFFSET(callfrom_ip)-4 );
fprintf( outfile, "\tpopl %%eax\n" );
fprintf( outfile, "\tpopl %%edx\n" );
/* Restore all registers from CONTEXT */
fprintf( outfile, "\tmovw %d(%%ebx), %%ss\n", CONTEXTOFFSET(SegSs) );
fprintf( outfile, "\tmovl %d(%%ebx), %%esp\n", CONTEXTOFFSET(Esp) );
fprintf( outfile, "\taddl $4, %%esp\n" ); /* room for final return address */
fprintf( outfile, "\tpushw %d(%%ebx)\n", CONTEXTOFFSET(SegCs) );
fprintf( outfile, "\tpushw %d(%%ebx)\n", CONTEXTOFFSET(Eip) );
fprintf( outfile, "\tpushl %%edx\n" );
fprintf( outfile, "\tpushl %%eax\n" );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(EFlags) );
fprintf( outfile, "\tpushl %d(%%ebx)\n", CONTEXTOFFSET(SegDs) );
fprintf( outfile, "\tmovw %d(%%ebx), %%es\n", CONTEXTOFFSET(SegEs) );
fprintf( outfile, "\tmovw %d(%%ebx), %%fs\n", CONTEXTOFFSET(SegFs) );
fprintf( outfile, "\tmovw %d(%%ebx), %%gs\n", CONTEXTOFFSET(SegGs) );
fprintf( outfile, "\tmovl %d(%%ebx), %%ebp\n", CONTEXTOFFSET(Ebp) );
fprintf( outfile, "\tmovl %d(%%ebx), %%esi\n", CONTEXTOFFSET(Esi) );
fprintf( outfile, "\tmovl %d(%%ebx), %%edi\n", CONTEXTOFFSET(Edi) );
fprintf( outfile, "\tmovl %d(%%ebx), %%eax\n", CONTEXTOFFSET(Eax) );
fprintf( outfile, "\tmovl %d(%%ebx), %%edx\n", CONTEXTOFFSET(Edx) );
fprintf( outfile, "\tmovl %d(%%ebx), %%ecx\n", CONTEXTOFFSET(Ecx) );
fprintf( outfile, "\tmovl %d(%%ebx), %%ebx\n", CONTEXTOFFSET(Ebx) );
fprintf( outfile, "\tpopl %%ds\n" );
fprintf( outfile, "\tpopfl\n" );
fprintf( outfile, "\tlret\n" );
}
else
{
/* Switch stack back */
fprintf( outfile, "\t.byte 0x64\n\tmovw (%d), %%ss\n", STACKOFFSET+2 );
fprintf( outfile, "\t.byte 0x64\n\tmovzwl (%d), %%esp\n", STACKOFFSET );
fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
/* Restore registers */
fprintf( outfile, "\tpopl %%edx\n" );
fprintf( outfile, "\tpopl %%ecx\n" );
fprintf( outfile, "\tpopl %%ebp\n" );
fprintf( outfile, "\tpopw %%ds\n" );
fprintf( outfile, "\tpopw %%es\n" );
fprintf( outfile, "\tpopw %%fs\n" );
fprintf( outfile, "\tpopw %%gs\n" );
/* Prepare return value and set flags accordingly */
if ( !short_ret )
fprintf( outfile, "\tshldl $16, %%eax, %%edx\n" );
fprintf( outfile, "\torl %%eax, %%eax\n" );
/* Return to return stub which will return to caller */
fprintf( outfile, "\tlret $12\n" );
}
}
/*******************************************************************
* BuildCallFrom32Regs
*
* Build a 32-bit-to-Wine call-back function for a 'register' function.
* 'args' is the number of dword arguments.
*
* Stack layout:
* ...
* (ebp+16) first arg
* (ebp+12) ret addr to user code
* (ebp+8) eax saved by relay code
* (ebp+4) ret addr to relay code
* (ebp+0) saved ebp
* (ebp-128) buffer area to allow stack frame manipulation
* (ebp-332) CONTEXT86 struct
* (ebp-336) padding for stack alignment
* (ebp-336-n) CONTEXT86 *argument
* .... other arguments copied from (ebp+12)
*
* The entry point routine is called with a CONTEXT* extra argument,
* following the normal args. In this context structure, EIP_reg
* contains the return address to user code, and ESP_reg the stack
* pointer on return (with the return address and arguments already
* removed).
*/
static void BuildCallFrom32Regs(void)
{
static const int STACK_SPACE = 128 + sizeof(CONTEXT86);
/* Function header */
function_header( "__wine_call_from_32_regs" );
/* Allocate some buffer space on the stack */
output( "\tpushl %%ebp\n" );
output( "\tmovl %%esp,%%ebp\n ");
output( "\tleal -%d(%%esp), %%esp\n", STACK_SPACE + 4 /* for context arg */);
/* Build the context structure */
output( "\tpushfl\n" );
output( "\tpopl %%eax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(EFlags) - STACK_SPACE );
output( "\tmovl 0(%%ebp),%%eax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Ebp) - STACK_SPACE );
output( "\tmovl 8(%%ebp),%%eax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eax) - STACK_SPACE );
output( "\tmovl %%ebx,%d(%%ebp)\n", CONTEXTOFFSET(Ebx) - STACK_SPACE );
output( "\tmovl %%ecx,%d(%%ebp)\n", CONTEXTOFFSET(Ecx) - STACK_SPACE );
output( "\tmovl %%edx,%d(%%ebp)\n", CONTEXTOFFSET(Edx) - STACK_SPACE );
output( "\tmovl %%esi,%d(%%ebp)\n", CONTEXTOFFSET(Esi) - STACK_SPACE );
output( "\tmovl %%edi,%d(%%ebp)\n", CONTEXTOFFSET(Edi) - STACK_SPACE );
output( "\txorl %%eax,%%eax\n" );
output( "\tmovw %%cs,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegCs) - STACK_SPACE );
output( "\tmovw %%es,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegEs) - STACK_SPACE );
output( "\tmovw %%fs,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegFs) - STACK_SPACE );
output( "\tmovw %%gs,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegGs) - STACK_SPACE );
output( "\tmovw %%ss,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegSs) - STACK_SPACE );
output( "\tmovw %%ds,%%ax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(SegDs) - STACK_SPACE );
output( "\tmovw %%ax,%%es\n" ); /* set %es equal to %ds just in case */
output( "\tmovl $0x%x,%%eax\n", CONTEXT86_FULL );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(ContextFlags) - STACK_SPACE );
output( "\tmovl 12(%%ebp),%%eax\n" ); /* Get %eip at time of call */
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Eip) - STACK_SPACE );
/* Transfer the arguments */
output( "\tmovl 4(%%ebp),%%ebx\n" ); /* get relay code addr */
output( "\tmovzbl 4(%%ebx),%%ecx\n" ); /* fetch number of args to copy */
output( "\tsubl %%ecx,%%esp\n" );
output( "\tandl $~15,%%esp\n" );
output( "\tleal 16(%%ebp),%%esi\n" ); /* get %esp at time of call */
output( "\tmovl %%esp,%%edi\n" );
output( "\tshrl $2,%%ecx\n" );
output( "\tjz 1f\n" );
output( "\tcld\n" );
output( "\trep\n\tmovsl\n" ); /* copy args */
output( "1:\tleal %d(%%ebp),%%eax\n", -STACK_SPACE ); /* get addr of context struct */
output( "\tmovl %%eax,(%%edi)\n" ); /* and pass it as extra arg */
output( "\tmovzbl 5(%%ebx),%%eax\n" ); /* fetch number of args to remove */
output( "\tleal 16(%%ebp,%%eax),%%eax\n" );
output( "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Esp) - STACK_SPACE );
/* Call the entry point */
output( "\taddl (%%ebx),%%ebx\n" );
output( "\tcall *%%ebx\n" );
output( "\tleal -%d(%%ebp),%%ecx\n", STACK_SPACE );
/* Restore the context structure */
output( "2:\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegEs) );
output( "\tpopl %%es\n" );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegFs) );
output( "\tpopl %%fs\n" );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegGs) );
output( "\tpopl %%gs\n" );
output( "\tmovl %d(%%ecx),%%edi\n", CONTEXTOFFSET(Edi) );
output( "\tmovl %d(%%ecx),%%esi\n", CONTEXTOFFSET(Esi) );
output( "\tmovl %d(%%ecx),%%edx\n", CONTEXTOFFSET(Edx) );
output( "\tmovl %d(%%ecx),%%ebx\n", CONTEXTOFFSET(Ebx) );
output( "\tmovl %d(%%ecx),%%eax\n", CONTEXTOFFSET(Eax) );
output( "\tmovl %d(%%ecx),%%ebp\n", CONTEXTOFFSET(Ebp) );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegSs) );
output( "\tpopl %%ss\n" );
output( "\tmovl %d(%%ecx),%%esp\n", CONTEXTOFFSET(Esp) );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(EFlags) );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegCs) );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(Eip) );
output( "\tpushl %d(%%ecx)\n", CONTEXTOFFSET(SegDs) );
output( "\tmovl %d(%%ecx),%%ecx\n", CONTEXTOFFSET(Ecx) );
output( "\tpopl %%ds\n" );
output( "\tiret\n" );
output_function_size( "__wine_call_from_32_regs" );
function_header( "__wine_call_from_32_restore_regs" );
output( "\tmovl 4(%%esp),%%ecx\n" );
output( "\tjmp 2b\n" );
output_function_size( "__wine_call_from_32_restore_regs" );
}
/*******************************************************************
* BuildCallTo16Core
*
* This routine builds the core routines used in 32->16 thunks:
*
* extern DWORD WINAPI wine_call_to_16( FARPROC16 target, DWORD cbArgs, PEXCEPTION_HANDLER handler );
* extern void WINAPI wine_call_to_16_regs( CONTEXT86 *context, DWORD cbArgs, PEXCEPTION_HANDLER handler );
*
* These routines can be called directly from 32-bit code.
*
* All routines expect that the 16-bit stack contents (arguments) and the
* return address (segptr to CallTo16_Ret) were already set up by the
* caller; nb_args must contain the number of bytes to be conserved. The
* 16-bit SS:SP will be set accordingly.
*
* All other registers are either taken from the CONTEXT86 structure
* or else set to default values. The target routine address is either
* given directly or taken from the CONTEXT86.
*/
static void BuildCallTo16Core( int reg_func )
{
const char *name = reg_func ? "wine_call_to_16_regs" : "wine_call_to_16";
/* Function header */
function_header( name );
/* Function entry sequence */
output( "\tpushl %%ebp\n" );
output( "\tmovl %%esp, %%ebp\n" );
/* Save the 32-bit registers */
output( "\tpushl %%ebx\n" );
output( "\tpushl %%esi\n" );
output( "\tpushl %%edi\n" );
output( "\t.byte 0x64\n\tmov %%gs,(%d)\n", GS_OFFSET );
/* Setup exception frame */
output( "\t.byte 0x64\n\tpushl (%d)\n", STACKOFFSET );
output( "\tpushl 16(%%ebp)\n" ); /* handler */
output( "\t.byte 0x64\n\tpushl (0)\n" );
output( "\t.byte 0x64\n\tmovl %%esp,(0)\n" );
/* Call the actual CallTo16 routine (simulate a lcall) */
output( "\tpushl %%cs\n" );
output( "\tcall .L%s\n", name );
/* Remove exception frame */
output( "\t.byte 0x64\n\tpopl (0)\n" );
output( "\taddl $4, %%esp\n" );
output( "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET );
if ( !reg_func )
{
/* Convert return value */
output( "\tandl $0xffff,%%eax\n" );
output( "\tshll $16,%%edx\n" );
output( "\torl %%edx,%%eax\n" );
}
else
{
/*
* Modify CONTEXT86 structure to contain new values
*
* NOTE: We restore only EAX, EBX, EDX, EDX, EBP, and ESP.
* The segment registers as well as ESI and EDI should
* not be modified by a well-behaved 16-bit routine in
* any case. [If necessary, we could restore them as well,
* at the cost of a somewhat less efficient return path.]
*/
output( "\tmovl %d(%%esp), %%edi\n", STACK32OFFSET(target) - STACK32OFFSET(edi));
/* everything above edi has been popped already */
output( "\tmovl %%eax, %d(%%edi)\n", CONTEXTOFFSET(Eax) );
output( "\tmovl %%ebx, %d(%%edi)\n", CONTEXTOFFSET(Ebx) );
output( "\tmovl %%ecx, %d(%%edi)\n", CONTEXTOFFSET(Ecx) );
output( "\tmovl %%edx, %d(%%edi)\n", CONTEXTOFFSET(Edx) );
output( "\tmovl %%ebp, %d(%%edi)\n", CONTEXTOFFSET(Ebp) );
output( "\tmovl %%esi, %d(%%edi)\n", CONTEXTOFFSET(Esp) );
/* The return glue code saved %esp into %esi */
}
/* Restore the 32-bit registers */
output( "\tpopl %%edi\n" );
output( "\tpopl %%esi\n" );
output( "\tpopl %%ebx\n" );
/* Function exit sequence */
output( "\tpopl %%ebp\n" );
output( "\tret $12\n" );
/* Start of the actual CallTo16 routine */
output( ".L%s:\n", name );
/* Switch to the 16-bit stack */
output( "\tmovl %%esp,%%edx\n" );
output( "\t.byte 0x64\n\tmovw (%d),%%ss\n", STACKOFFSET + 2);
output( "\t.byte 0x64\n\tmovw (%d),%%sp\n", STACKOFFSET );
output( "\t.byte 0x64\n\tmovl %%edx,(%d)\n", STACKOFFSET );
/* Make %bp point to the previous stackframe (built by CallFrom16) */
output( "\tmovzwl %%sp,%%ebp\n" );
output( "\tleal %d(%%ebp),%%ebp\n", STACK16OFFSET(bp) );
/* Add the specified offset to the new sp */
output( "\tsubw %d(%%edx), %%sp\n", STACK32OFFSET(nb_args) );
if (reg_func)
{
/* Push the called routine address */
output( "\tmovl %d(%%edx),%%edx\n", STACK32OFFSET(target) );
output( "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegCs) );
output( "\tpushw %d(%%edx)\n", CONTEXTOFFSET(Eip) );
/* Get the registers */
output( "\tpushw %d(%%edx)\n", CONTEXTOFFSET(SegDs) );
output( "\tpushl %d(%%edx)\n", CONTEXTOFFSET(SegEs) );
output( "\tpopl %%es\n" );
output( "\tpushl %d(%%edx)\n", CONTEXTOFFSET(SegFs) );
output( "\tpopl %%fs\n" );
output( "\tpushl %d(%%edx)\n", CONTEXTOFFSET(SegGs) );
output( "\tpopl %%gs\n" );
output( "\tmovl %d(%%edx),%%ebp\n", CONTEXTOFFSET(Ebp) );
output( "\tmovl %d(%%edx),%%esi\n", CONTEXTOFFSET(Esi) );
output( "\tmovl %d(%%edx),%%edi\n", CONTEXTOFFSET(Edi) );
output( "\tmovl %d(%%edx),%%eax\n", CONTEXTOFFSET(Eax) );
output( "\tmovl %d(%%edx),%%ebx\n", CONTEXTOFFSET(Ebx) );
output( "\tmovl %d(%%edx),%%ecx\n", CONTEXTOFFSET(Ecx) );
output( "\tmovl %d(%%edx),%%edx\n", CONTEXTOFFSET(Edx) );
/* Get the 16-bit ds */
output( "\tpopw %%ds\n" );
}
else /* not a register function */
{
/* Push the called routine address */
output( "\tpushl %d(%%edx)\n", STACK32OFFSET(target) );
/* Set %fs and %gs to the value saved by the last CallFrom16 */
output( "\tpushw %d(%%ebp)\n", STACK16OFFSET(fs)-STACK16OFFSET(bp) );
output( "\tpopw %%fs\n" );
output( "\tpushw %d(%%ebp)\n", STACK16OFFSET(gs)-STACK16OFFSET(bp) );
output( "\tpopw %%gs\n" );
/* Set %ds and %es (and %ax just in case) equal to %ss */
output( "\tmovw %%ss,%%ax\n" );
output( "\tmovw %%ax,%%ds\n" );
output( "\tmovw %%ax,%%es\n" );
}
/* Jump to the called routine */
output( "\t.byte 0x66\n" );
output( "\tlret\n" );
/* Function footer */
output_function_size( name );
}
