| /* |
| * Relay calls helper routines |
| * |
| * Copyright 1993 Robert J. Amstadt |
| * Copyright 1995 Martin von Loewis |
| * Copyright 1995, 1996, 1997 Alexandre Julliard |
| * Copyright 1997 Eric Youngdale |
| * Copyright 1999 Ulrich Weigand |
| */ |
| |
| #include <ctype.h> |
| #include <unistd.h> |
| |
| #include "config.h" |
| #include "winnt.h" |
| #include "thread.h" |
| #include "stackframe.h" |
| |
| #include "build.h" |
| |
| #ifdef __i386__ |
| |
| /******************************************************************* |
| * 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 ) |
| { |
| char *name = thunk? "thunk" : reg_func? "regs" : short_ret? "word" : "long"; |
| |
| /* Function header */ |
| fprintf( outfile, "\n\t.align 4\n" ); |
| #ifdef USE_STABS |
| fprintf( outfile, ".stabs \"__wine_call_from_16_%s:F1\",36,0,0," PREFIX "__wine_call_from_16_%s\n", name, name); |
| #endif |
| fprintf( outfile, "\t" __ASM_FUNC("__wine_call_from_16_%s") "\n", name ); |
| fprintf( outfile, "\t.globl " PREFIX "__wine_call_from_16_%s\n", name ); |
| fprintf( outfile, PREFIX "__wine_call_from_16_%s:\n", name ); |
| |
| /* 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 .L__wine_call_from_16_%s.getgot1\n", name ); |
| fprintf( outfile, ".L__wine_call_from_16_%s.getgot1:\n", name ); |
| fprintf( outfile, "\tpopl %%ecx\n" ); |
| fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot1], %%ecx\n", name ); |
| } |
| |
| if (UsePIC) |
| { |
| fprintf( outfile, "\t.byte 0x2e\n\tmovl " PREFIX "CallTo16_DataSelector@GOT(%%ecx), %%edx\n" ); |
| fprintf( outfile, "\t.byte 0x2e\n\tmovl (%%edx), %%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, "\tmovl " PREFIX "SYSLEVEL_Win16CurrentTeb@GOT(%%ecx), %%edx\n" ); |
| fprintf( outfile, "\tmovw (%%edx), %%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 " PREFIX "wine_ldt_copy@GOT(%%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 %d(%%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\tlssw (%d), %%sp\n", STACKOFFSET ); */ |
| fprintf( outfile, "\t.byte 0x64,0x66,0x0f,0xb2,0x25\n\t.long %d\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 $%d, %%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 ) |
| { |
| if ( UsePIC ) |
| { |
| fprintf( outfile, "\tpushl %%ebx\n" ); |
| |
| /* Get Global Offset Table into %ebx (for PLT call) */ |
| fprintf( outfile, "\tcall .L__wine_call_from_16_%s.getgot2\n", name ); |
| fprintf( outfile, ".L__wine_call_from_16_%s.getgot2:\n", name ); |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot2], %%ebx\n", name ); |
| } |
| |
| fprintf( outfile, "\tpushl %%edx\n" ); |
| if ( reg_func ) |
| fprintf( outfile, "\tleal -%d(%%ebp), %%eax\n\tpushl %%eax\n", |
| sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) ); |
| else |
| fprintf( outfile, "\tpushl $0\n" ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16@PLT\n "); |
| else |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16\n "); |
| |
| fprintf( outfile, "\tpopl %%edx\n" ); |
| fprintf( outfile, "\tpopl %%edx\n" ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| } |
| |
| /* Call relay routine (which will call the API entry point) */ |
| fprintf( outfile, "\tleal %d(%%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 ) |
| { |
| if ( UsePIC ) |
| { |
| fprintf( outfile, "\tpushl %%ebx\n" ); |
| |
| /* Get Global Offset Table into %ebx (for PLT call) */ |
| fprintf( outfile, "\tcall .L__wine_call_from_16_%s.getgot3\n", name ); |
| fprintf( outfile, ".L__wine_call_from_16_%s.getgot3:\n", name ); |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.L__wine_call_from_16_%s.getgot3], %%ebx\n", name ); |
| } |
| |
| fprintf( outfile, "\tpushl %%eax\n" ); |
| if ( reg_func ) |
| fprintf( outfile, "\tleal -%d(%%ebp), %%eax\n\tpushl %%eax\n", |
| sizeof(CONTEXT) + STRUCTOFFSET(STACK32FRAME, ebp) ); |
| else |
| fprintf( outfile, "\tpushl $0\n" ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16Ret@PLT\n "); |
| else |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallFrom16Ret\n "); |
| |
| fprintf( outfile, "\tpopl %%eax\n" ); |
| fprintf( outfile, "\tpopl %%eax\n" ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| } |
| |
| |
| if ( reg_func ) |
| { |
| fprintf( outfile, "\tmovl %%esp, %%ebx\n" ); |
| |
| /* Switch stack back */ |
| /* fprintf( outfile, "\t.byte 0x64\n\tlssw (%d), %%sp\n", STACKOFFSET ); */ |
| fprintf( outfile, "\t.byte 0x64,0x66,0x0f,0xb2,0x25\n\t.long %d\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\tlssw (%d), %%sp\n", STACKOFFSET ); */ |
| fprintf( outfile, "\t.byte 0x64,0x66,0x0f,0xb2,0x25\n\t.long %d\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" ); |
| } |
| } |
| |
| |
| /******************************************************************* |
| * 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 */ |
| fprintf( outfile, "\n\t.align 4\n" ); |
| #ifdef USE_STABS |
| fprintf( outfile, ".stabs \"wine_call_to_16_%s:F1\",36,0,0," PREFIX "wine_call_to_16_%s\n", |
| name, name); |
| #endif |
| fprintf( outfile, "\t" __ASM_FUNC("wine_call_to_16_%s") "\n", name ); |
| fprintf( outfile, "\t.globl " PREFIX "wine_call_to_16_%s\n", name ); |
| fprintf( outfile, PREFIX "wine_call_to_16_%s:\n", name ); |
| |
| /* 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 ) |
| { |
| /* Get Global Offset Table into %ebx */ |
| fprintf( outfile, "\tcall .Lwine_call_to_16_%s.getgot1\n", name ); |
| fprintf( outfile, ".Lwine_call_to_16_%s.getgot1:\n", name ); |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.Lwine_call_to_16_%s.getgot1], %%ebx\n", name ); |
| } |
| |
| /* Enter Win16 Mutex */ |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "_EnterWin16Lock@PLT\n" ); |
| else |
| 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" ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16@PLT\n" ); |
| else |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16\n" ); |
| |
| fprintf( outfile, "\taddl $12, %%esp\n" ); |
| } |
| |
| /* Get return address */ |
| if ( UsePIC ) |
| { |
| fprintf( outfile, "\tmovl " PREFIX "CallTo16_RetAddr@GOT(%%ebx), %%ecx\n" ); |
| fprintf( outfile, "\tmovl " PREFIX "(%%ecx), %%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" ); |
| } |
| |
| if ( UsePIC ) |
| { |
| /* Get Global Offset Table into %ebx (might have been overwritten) */ |
| fprintf( outfile, "\tcall .Lwine_call_to_16_%s.getgot2\n", name ); |
| fprintf( outfile, ".Lwine_call_to_16_%s.getgot2:\n", name ); |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| fprintf( outfile, "\taddl $_GLOBAL_OFFSET_TABLE_+[.-.Lwine_call_to_16_%s.getgot2], %%ebx\n", name ); |
| } |
| |
| /* Print debugging info */ |
| if (debugging) |
| { |
| fprintf( outfile, "\tpushl $%d\n", reg_func ); |
| |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16Ret@PLT\n" ); |
| else |
| fprintf( outfile, "\tcall " PREFIX "RELAY_DebugCallTo16Ret\n" ); |
| |
| fprintf( outfile, "\taddl $4, %%esp\n" ); |
| } |
| |
| /* Leave Win16 Mutex */ |
| if ( UsePIC ) |
| fprintf( outfile, "\tcall " PREFIX "_LeaveWin16Lock@PLT\n" ); |
| else |
| 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" ); |
| } |
| |
| |
| /******************************************************************* |
| * BuildRet16Func |
| * |
| * Build the return code for 16-bit callbacks |
| */ |
| static void BuildRet16Func( FILE *outfile ) |
| { |
| /* |
| * Note: This must reside in the .data section to allow |
| * run-time relocation of the SYSLEVEL_Win16CurrentTeb symbol |
| */ |
| |
| fprintf( outfile, "\n\t" __ASM_FUNC("CallTo16_Ret") "\n" ); |
| fprintf( outfile, "\t.globl " PREFIX "CallTo16_Ret\n" ); |
| fprintf( outfile, PREFIX "CallTo16_Ret:\n" ); |
| |
| /* Save %esp into %esi */ |
| fprintf( outfile, "\tmovl %%esp,%%esi\n" ); |
| |
| /* Restore 32-bit segment registers */ |
| |
| fprintf( outfile, "\t.byte 0x2e\n\tmovl " PREFIX "CallTo16_DataSelector-" PREFIX "Call16_Ret_Start,%%edi\n" ); |
| #ifdef __svr4__ |
| fprintf( outfile, "\tdata16\n"); |
| #endif |
| fprintf( outfile, "\tmovw %%di,%%ds\n" ); |
| #ifdef __svr4__ |
| fprintf( outfile, "\tdata16\n"); |
| #endif |
| fprintf( outfile, "\tmovw %%di,%%es\n" ); |
| |
| fprintf( outfile, "\tmovw " PREFIX "SYSLEVEL_Win16CurrentTeb,%%fs\n" ); |
| |
| /* Restore the 32-bit stack */ |
| |
| #ifdef __svr4__ |
| fprintf( outfile, "\tdata16\n"); |
| #endif |
| fprintf( outfile, "\tmovw %%di,%%ss\n" ); |
| fprintf( outfile, "\t.byte 0x64\n\tmovl (%d),%%esp\n", STACKOFFSET ); |
| fprintf( outfile, "\t.byte 0x64\n\tpopl (%d)\n", STACKOFFSET ); |
| |
| /* Return to caller */ |
| |
| fprintf( outfile, "\tlret\n" ); |
| |
| /* Declare the return address and data selector variables */ |
| |
| fprintf( outfile, "\n\t.align 4\n" ); |
| fprintf( outfile, "\t.globl " PREFIX "CallTo16_DataSelector\n" ); |
| fprintf( outfile, PREFIX "CallTo16_DataSelector:\t.long 0\n" ); |
| fprintf( outfile, "\t.globl " PREFIX "CallTo16_RetAddr\n" ); |
| fprintf( outfile, PREFIX "CallTo16_RetAddr:\t.long 0\n" ); |
| } |
| |
| |
| /******************************************************************* |
| * 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( FILE *outfile, BOOL isEx ) |
| { |
| char *name = isEx? "CBClientEx" : "CBClient"; |
| int size = isEx? 24 : 12; |
| |
| /* Function header */ |
| |
| fprintf( outfile, "\n\t.align 4\n" ); |
| #ifdef USE_STABS |
| fprintf( outfile, ".stabs \"CALL32_%s:F1\",36,0,0," PREFIX "CALL32_%s\n", |
| name, name ); |
| #endif |
| fprintf( outfile, "\t.globl " PREFIX "CALL32_%s\n", name ); |
| fprintf( outfile, PREFIX "CALL32_%s:\n", name ); |
| |
| /* Entry code */ |
| |
| fprintf( outfile, "\tpushl %%ebp\n" ); |
| fprintf( outfile, "\tmovl %%esp,%%ebp\n" ); |
| fprintf( outfile, "\tpushl %%edi\n" ); |
| fprintf( outfile, "\tpushl %%esi\n" ); |
| fprintf( outfile, "\tpushl %%ebx\n" ); |
| |
| /* Get the 16-bit stack */ |
| |
| fprintf( outfile, "\t.byte 0x64\n\tmovl (%d),%%ebx\n", STACKOFFSET); |
| |
| /* Convert it to a flat address */ |
| |
| fprintf( outfile, "\tshldl $16,%%ebx,%%eax\n" ); |
| fprintf( outfile, "\tandl $0xfff8,%%eax\n" ); |
| fprintf( outfile, "\tshrl $1,%%eax\n" ); |
| fprintf( outfile, "\tmovl " PREFIX "wine_ldt_copy(%%eax),%%esi\n" ); |
| fprintf( outfile, "\tmovw %%bx,%%ax\n" ); |
| fprintf( outfile, "\taddl %%eax,%%esi\n" ); |
| |
| /* Allocate temporary area (simulate STACK16_PUSH) */ |
| |
| fprintf( outfile, "\tpushf\n" ); |
| fprintf( outfile, "\tcld\n" ); |
| fprintf( outfile, "\tleal -%d(%%esi), %%edi\n", size ); |
| fprintf( outfile, "\tmovl $%d, %%ecx\n", sizeof(STACK16FRAME) ); |
| fprintf( outfile, "\trep\n\tmovsb\n" ); |
| fprintf( outfile, "\tpopf\n" ); |
| |
| fprintf( outfile, "\t.byte 0x64\n\tsubw $%d,(%d)\n", size, STACKOFFSET ); |
| |
| fprintf( outfile, "\tpushl %%edi\n" ); /* remember address */ |
| |
| /* Set up temporary area */ |
| |
| if ( !isEx ) |
| { |
| fprintf( outfile, "\tleal 4(%%edi), %%edi\n" ); |
| |
| fprintf( outfile, "\tleal -8(%%esp), %%eax\n" ); |
| fprintf( outfile, "\tmovl %%eax, -8(%%edi)\n" ); /* 32-bit sp */ |
| |
| fprintf( outfile, "\tmovw %%ss, %%ax\n" ); |
| fprintf( outfile, "\tandl $0x0000ffff, %%eax\n" ); |
| fprintf( outfile, "\tmovl %%eax, -4(%%edi)\n" ); /* 32-bit ss */ |
| |
| fprintf( outfile, "\taddl $%d, %%ebx\n", sizeof(STACK16FRAME)-size+4 + 4 ); |
| fprintf( outfile, "\tmovl %%ebx, 0(%%edi)\n" ); /* 16-bit ss:sp */ |
| |
| fprintf( outfile, "\tmovl " PREFIX "CALL32_%s_RetAddr, %%eax\n", name ); |
| fprintf( outfile, "\tmovl %%eax, 4(%%edi)\n" ); /* overwrite return address */ |
| } |
| else |
| { |
| fprintf( outfile, "\taddl $%d, %%ebx\n", sizeof(STACK16FRAME)-size+4 ); |
| fprintf( outfile, "\tmovl %%ebx, 0(%%edi)\n" ); |
| |
| fprintf( outfile, "\tmovw %%ds, %%ax\n" ); |
| fprintf( outfile, "\tmovw %%ax, 4(%%edi)\n" ); |
| |
| fprintf( outfile, "\taddl $20, %%ebx\n" ); |
| fprintf( outfile, "\tmovw %%bx, 10(%%edi)\n" ); |
| |
| fprintf( outfile, "\tleal -8(%%esp), %%eax\n" ); |
| fprintf( outfile, "\tmovl %%eax, 12(%%edi)\n" ); |
| |
| fprintf( outfile, "\tmovw %%ss, %%ax\n" ); |
| fprintf( outfile, "\tandl $0x0000ffff, %%eax\n" ); |
| fprintf( outfile, "\tmovl %%eax, 16(%%edi)\n" ); |
| |
| fprintf( outfile, "\tmovl " PREFIX "CALL32_%s_RetAddr, %%eax\n", name ); |
| fprintf( outfile, "\tmovl %%eax, 20(%%edi)\n" ); |
| } |
| |
| /* Set up registers and call CBClient relay stub (simulating a far call) */ |
| |
| fprintf( outfile, "\tmovl 16(%%ebp), %%esi\n" ); |
| fprintf( outfile, "\tmovl (%%esi), %%esi\n" ); |
| |
| fprintf( outfile, "\tmovl %%edi, %%ebx\n" ); |
| fprintf( outfile, "\tmovl 8(%%ebp), %%eax\n" ); |
| fprintf( outfile, "\tmovl 12(%%ebp), %%ebp\n" ); |
| |
| fprintf( outfile, "\tpushl %%cs\n" ); |
| fprintf( outfile, "\tcall *%%eax\n" ); |
| |
| /* Return new esi value to caller */ |
| |
| fprintf( outfile, "\tmovl 32(%%esp), %%edi\n" ); |
| fprintf( outfile, "\tmovl %%esi, (%%edi)\n" ); |
| |
| /* Cleanup temporary area (simulate STACK16_POP) */ |
| |
| fprintf( outfile, "\tpop %%esi\n" ); |
| |
| fprintf( outfile, "\tpushf\n" ); |
| fprintf( outfile, "\tstd\n" ); |
| fprintf( outfile, "\tdec %%esi\n" ); |
| fprintf( outfile, "\tleal %d(%%esi), %%edi\n", size ); |
| fprintf( outfile, "\tmovl $%d, %%ecx\n", sizeof(STACK16FRAME) ); |
| fprintf( outfile, "\trep\n\tmovsb\n" ); |
| fprintf( outfile, "\tpopf\n" ); |
| |
| fprintf( outfile, "\t.byte 0x64\n\taddw $%d,(%d)\n", size, STACKOFFSET ); |
| |
| /* Return argument size to caller */ |
| if ( isEx ) |
| { |
| fprintf( outfile, "\tmovl 32(%%esp), %%ebx\n" ); |
| fprintf( outfile, "\tmovl %%ebp, (%%ebx)\n" ); |
| } |
| |
| /* Restore registers and return */ |
| |
| fprintf( outfile, "\tpopl %%ebx\n" ); |
| fprintf( outfile, "\tpopl %%esi\n" ); |
| fprintf( outfile, "\tpopl %%edi\n" ); |
| fprintf( outfile, "\tpopl %%ebp\n" ); |
| fprintf( outfile, "\tret\n" ); |
| } |
| |
| static void BuildCallTo32CBClientRet( FILE *outfile, BOOL isEx ) |
| { |
| char *name = isEx? "CBClientEx" : "CBClient"; |
| |
| /* '16-bit' return stub */ |
| |
| fprintf( outfile, "\n\t.globl " PREFIX "CALL32_%s_Ret\n", name ); |
| fprintf( outfile, PREFIX "CALL32_%s_Ret:\n", name ); |
| |
| if ( !isEx ) |
| { |
| fprintf( outfile, "\tmovzwl %%sp, %%ebx\n" ); |
| fprintf( outfile, "\tlssl %%ss:-16(%%ebx), %%esp\n" ); |
| } |
| else |
| { |
| fprintf( outfile, "\tmovzwl %%bp, %%ebx\n" ); |
| fprintf( outfile, "\tsubw %%bp, %%sp\n" ); |
| fprintf( outfile, "\tmovzwl %%sp, %%ebp\n" ); |
| fprintf( outfile, "\tlssl %%ss:-12(%%ebx), %%esp\n" ); |
| } |
| fprintf( outfile, "\tlret\n" ); |
| |
| /* Declare the return address variable */ |
| |
| fprintf( outfile, "\n\t.globl " PREFIX "CALL32_%s_RetAddr\n", name ); |
| fprintf( outfile, PREFIX "CALL32_%s_RetAddr:\t.long 0\n", name ); |
| } |
| |
| |
| /******************************************************************* |
| * BuildCallFrom32Regs |
| * |
| * Build a 32-bit-to-Wine call-back function for a 'register' function. |
| * 'args' is the number of dword arguments. |
| * |
| * Stack layout: |
| * ... |
| * (ebp+12) first arg |
| * (ebp+8) ret addr to user 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) 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 */ |
| |
| fprintf( outfile, "\n\t.align 4\n" ); |
| #ifdef USE_STABS |
| fprintf( outfile, ".stabs \"CALL32_Regs:F1\",36,0,0," PREFIX "CALL32_Regs\n" ); |
| #endif |
| fprintf( outfile, "\t.globl " PREFIX "CALL32_Regs\n" ); |
| fprintf( outfile, PREFIX "CALL32_Regs:\n" ); |
| |
| /* 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 8(%%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 4(%%ebp),%%ebx\n" ); /* get relay code addr */ |
| fprintf( outfile, "\tpushl %%esp\n" ); /* push ptr to context struct */ |
| fprintf( outfile, "\tmovzbl 4(%%ebx),%%ecx\n" ); /* fetch number of args to copy */ |
| fprintf( outfile, "\tjecxz 1f\n" ); |
| fprintf( outfile, "\tsubl %%ecx,%%esp\n" ); |
| fprintf( outfile, "\tleal 12(%%ebp),%%esi\n" ); /* get %esp at time of call */ |
| fprintf( outfile, "\tmovl %%esp,%%edi\n" ); |
| fprintf( outfile, "\tshrl $2,%%ecx\n" ); |
| fprintf( outfile, "\tcld\n" ); |
| fprintf( outfile, "\trep\n\tmovsl\n" ); /* copy args */ |
| |
| fprintf( outfile, "1:\tmovzbl 5(%%ebx),%%eax\n" ); /* fetch number of args to remove */ |
| fprintf( outfile, "\tleal 12(%%ebp,%%eax),%%eax\n" ); |
| fprintf( outfile, "\tmovl %%eax,%d(%%ebp)\n", CONTEXTOFFSET(Esp) - STACK_SPACE ); |
| |
| /* Call the entry point */ |
| |
| fprintf( outfile, "\tcall *0(%%ebx)\n" ); |
| |
| /* Store %eip and %ebp onto the new stack */ |
| |
| fprintf( outfile, "\tmovl %d(%%ebp),%%edx\n", CONTEXTOFFSET(Esp) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Eip) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %%eax,-4(%%edx)\n" ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Ebp) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %%eax,-8(%%edx)\n" ); |
| |
| /* Restore the context structure */ |
| |
| /* Note: we don't bother to restore %cs, %ds and %ss |
| * changing them in 32-bit code is a recipe for disaster anyway |
| */ |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegEs) - STACK_SPACE ); |
| fprintf( outfile, "\tmovw %%ax,%%es\n" ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegFs) - STACK_SPACE ); |
| fprintf( outfile, "\tmovw %%ax,%%fs\n" ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(SegGs) - STACK_SPACE ); |
| fprintf( outfile, "\tmovw %%ax,%%gs\n" ); |
| |
| fprintf( outfile, "\tmovl %d(%%ebp),%%edi\n", CONTEXTOFFSET(Edi) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%esi\n", CONTEXTOFFSET(Esi) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%edx\n", CONTEXTOFFSET(Edx) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%ecx\n", CONTEXTOFFSET(Ecx) - STACK_SPACE ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%ebx\n", CONTEXTOFFSET(Ebx) - STACK_SPACE ); |
| |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(EFlags) - STACK_SPACE ); |
| fprintf( outfile, "\tpushl %%eax\n" ); |
| fprintf( outfile, "\tpopfl\n" ); |
| fprintf( outfile, "\tmovl %d(%%ebp),%%eax\n", CONTEXTOFFSET(Eax) - STACK_SPACE ); |
| |
| fprintf( outfile, "\tmovl %d(%%ebp),%%ebp\n", CONTEXTOFFSET(Esp) - STACK_SPACE ); |
| fprintf( outfile, "\tleal -8(%%ebp),%%esp\n" ); |
| fprintf( outfile, "\tpopl %%ebp\n" ); |
| fprintf( outfile, "\tret\n" ); |
| } |
| |
| |
| /******************************************************************* |
| * BuildRelays |
| * |
| * Build all the relay callbacks |
| */ |
| void BuildRelays( FILE *outfile ) |
| { |
| /* File header */ |
| |
| fprintf( outfile, "/* File generated automatically. Do not edit! */\n\n" ); |
| fprintf( outfile, "\t.text\n" ); |
| |
| #ifdef USE_STABS |
| if (output_file_name) |
| { |
| char buffer[1024]; |
| getcwd(buffer, sizeof(buffer)); |
| fprintf( outfile, "\t.file\t\"%s\"\n", output_file_name ); |
| |
| /* |
| * The stabs help the internal debugger as they are an indication that it |
| * is sensible to step into a thunk/trampoline. |
| */ |
| fprintf( outfile, ".stabs \"%s/\",100,0,0,Code_Start\n", buffer); |
| fprintf( outfile, ".stabs \"%s\",100,0,0,Code_Start\n", output_file_name ); |
| fprintf( outfile, "Code_Start:\n\n" ); |
| } |
| #endif |
| fprintf( outfile, PREFIX"Call16_Start:\n" ); |
| fprintf( outfile, "\t.globl "PREFIX"Call16_Start\n" ); |
| fprintf( outfile, "\t.byte 0\n\n" ); |
| |
| /* Standard CallFrom16 routine (WORD return) */ |
| BuildCallFrom16Core( outfile, FALSE, FALSE, TRUE ); |
| |
| /* Standard CallFrom16 routine (DWORD return) */ |
| BuildCallFrom16Core( outfile, FALSE, FALSE, FALSE ); |
| |
| /* Register CallFrom16 routine */ |
| BuildCallFrom16Core( outfile, TRUE, FALSE, FALSE ); |
| |
| /* C16ThkSL CallFrom16 routine */ |
| BuildCallFrom16Core( outfile, FALSE, TRUE, FALSE ); |
| |
| /* Standard CallTo16 routine (WORD return) */ |
| BuildCallTo16Core( outfile, TRUE, FALSE ); |
| |
| /* Standard CallTo16 routine (DWORD return) */ |
| BuildCallTo16Core( outfile, FALSE, FALSE ); |
| |
| /* Register CallTo16 routine (16:16 retf) */ |
| BuildCallTo16Core( outfile, FALSE, 1 ); |
| |
| /* Register CallTo16 routine (16:32 retf) */ |
| BuildCallTo16Core( outfile, FALSE, 2 ); |
| |
| /* CBClientThunkSL routine */ |
| BuildCallTo32CBClient( outfile, FALSE ); |
| |
| /* CBClientThunkSLEx routine */ |
| BuildCallTo32CBClient( outfile, TRUE ); |
| |
| /* 32-bit register entry point */ |
| BuildCallFrom32Regs( outfile ); |
| |
| fprintf( outfile, PREFIX"Call16_End:\n" ); |
| fprintf( outfile, "\t.globl "PREFIX"Call16_End\n" ); |
| |
| #ifdef USE_STABS |
| fprintf( outfile, "\t.stabs \"\",100,0,0,.Letext\n"); |
| fprintf( outfile, ".Letext:\n"); |
| #endif |
| |
| /* The whole Call16_Ret segment must lie within the .data section */ |
| fprintf( outfile, "\n\t.data\n" ); |
| fprintf( outfile, "\t.globl " PREFIX "Call16_Ret_Start\n" ); |
| fprintf( outfile, PREFIX "Call16_Ret_Start:\n" ); |
| |
| /* Standard CallTo16 return stub */ |
| BuildRet16Func( outfile ); |
| |
| /* CBClientThunkSL return stub */ |
| BuildCallTo32CBClientRet( outfile, FALSE ); |
| |
| /* CBClientThunkSLEx return stub */ |
| BuildCallTo32CBClientRet( outfile, TRUE ); |
| |
| /* End of Call16_Ret segment */ |
| fprintf( outfile, "\n\t.globl " PREFIX "Call16_Ret_End\n" ); |
| fprintf( outfile, PREFIX "Call16_Ret_End:\n" ); |
| } |
| |
| #else /* __i386__ */ |
| |
| void BuildRelays( FILE *outfile ) |
| { |
| fprintf( outfile, "/* File not used with this architecture. Do not edit! */\n\n" ); |
| } |
| |
| #endif /* __i386__ */ |
| |
