| /* |
| * 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 |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <ctype.h> |
| #include <stdarg.h> |
| |
| #include "build.h" |
| |
| /* offset of the stack pointer relative to %fs:(0) */ |
| #define STACKOFFSET 0xc0 /* FIELD_OFFSET(TEB,WOW32Reserved) */ |
| |
| /* fix this if the ntdll_thread_regs structure is changed */ |
| #define GS_OFFSET 0x1d8 /* FIELD_OFFSET(TEB,SystemReserved2) + FIELD_OFFSET(ntdll_thread_data,gs) */ |
| |
| #define DPMI_VIF_OFFSET (0x1fc + 0) /* FIELD_OFFSET(TEB,GdiTebBatch) + FIELD_OFFSET(WINE_VM86_TEB_INFO,dpmi_vif) */ |
| #define VM86_PENDING_OFFSET (0x1fc + 4) /* FIELD_OFFSET(TEB,GdiTebBatch) + FIELD_OFFSET(WINE_VM86_TEB_INFO,vm86_pending) */ |
| |
| static void function_header( const char *name ) |
| { |
| output( "\n\t.align %d\n", get_alignment(4) ); |
| output( "\t%s\n", func_declaration(name) ); |
| output( "%s\n", asm_globl(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" ); |
| |
| 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" ); |
| } |
| 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" ); |
| } |
| if (thunk) output_function_size( "__wine_call_from_16_thunk" ); |
| else if (reg_func) output_function_size( "__wine_call_from_16_regs" ); |
| else output_function_size( "__wine_call_from_16" ); |
| } |
| |
| |
| /******************************************************************* |
| * 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 ); |
| } |
| |
| |
| /******************************************************************* |
| * BuildRet16Func |
| * |
| * Build the return code for 16-bit callbacks |
| */ |
| static void BuildRet16Func(void) |
| { |
| function_header( "__wine_call_to_16_ret" ); |
| |
| /* Save %esp into %esi */ |
| output( "\tmovl %%esp,%%esi\n" ); |
| |
| /* Restore 32-bit segment registers */ |
| |
| output( "\t.byte 0x2e\n\tmovl %s", asm_name("CallTo16_DataSelector") ); |
| output( "-%s,%%edi\n", asm_name("__wine_call16_start") ); |
| output( "\tmovw %%di,%%ds\n" ); |
| output( "\tmovw %%di,%%es\n" ); |
| |
| output( "\t.byte 0x2e\n\tmov %s", asm_name("CallTo16_TebSelector") ); |
| output( "-%s,%%fs\n", asm_name("__wine_call16_start") ); |
| |
| output( "\t.byte 0x64\n\tmov (%d),%%gs\n", GS_OFFSET ); |
| |
| /* Restore the 32-bit stack */ |
| |
| output( "\tmovw %%di,%%ss\n" ); |
| output( "\t.byte 0x64\n\tmovl (%d),%%esp\n", STACKOFFSET ); |
| |
| /* Return to caller */ |
| |
| output( "\tlret\n" ); |
| output_function_size( "__wine_call_to_16_ret" ); |
| } |
| |
| |
| /******************************************************************* |
| * 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" ); |
| } |
| |
| |
| /******************************************************************* |
| * build_call_from_regs_x86 |
| * |
| * 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 (relative to relay code ret addr) |
| * (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) 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 build_call_from_regs_x86(void) |
| { |
| static const int STACK_SPACE = 128 + 0x2cc /* sizeof(CONTEXT86) */; |
| |
| /* Function header */ |
| |
| output( "\t.text\n" ); |
| function_header( "__wine_call_from_regs" ); |
| |
| /* Allocate some buffer space on the stack */ |
| |
| 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( "\tleal -%d(%%esp),%%esp\n", STACK_SPACE ); |
| |
| /* Build the context structure */ |
| |
| output( "\tmovl %%eax,0xb0(%%esp)\n" ); /* Eax */ |
| output( "\tpushfl\n" ); |
| output( "\tpopl %%eax\n" ); |
| output( "\tmovl %%eax,0xc0(%%esp)\n"); /* EFlags */ |
| output( "\tmovl 0(%%ebp),%%eax\n" ); |
| output( "\tmovl %%eax,0xb4(%%esp)\n"); /* Ebp */ |
| output( "\tmovl %%ebx,0xa4(%%esp)\n"); /* Ebx */ |
| output( "\tmovl %%ecx,0xac(%%esp)\n"); /* Ecx */ |
| output( "\tmovl %%edx,0xa8(%%esp)\n"); /* Edx */ |
| output( "\tmovl %%esi,0xa0(%%esp)\n"); /* Esi */ |
| output( "\tmovl %%edi,0x9c(%%esp)\n"); /* Edi */ |
| |
| output( "\txorl %%eax,%%eax\n" ); |
| output( "\tmovw %%cs,%%ax\n" ); |
| output( "\tmovl %%eax,0xbc(%%esp)\n"); /* SegCs */ |
| output( "\tmovw %%es,%%ax\n" ); |
| output( "\tmovl %%eax,0x94(%%esp)\n"); /* SegEs */ |
| output( "\tmovw %%fs,%%ax\n" ); |
| output( "\tmovl %%eax,0x90(%%esp)\n"); /* SegFs */ |
| output( "\tmovw %%gs,%%ax\n" ); |
| output( "\tmovl %%eax,0x8c(%%esp)\n"); /* SegGs */ |
| output( "\tmovw %%ss,%%ax\n" ); |
| output( "\tmovl %%eax,0xc8(%%esp)\n"); /* SegSs */ |
| output( "\tmovw %%ds,%%ax\n" ); |
| output( "\tmovl %%eax,0x98(%%esp)\n"); /* SegDs */ |
| output( "\tmovw %%ax,%%es\n" ); /* set %es equal to %ds just in case */ |
| |
| output( "\tmovl $0x10007,0(%%esp)\n"); /* ContextFlags */ |
| |
| output( "\tmovl 16(%%ebp),%%eax\n" ); /* Get %eip at time of call */ |
| output( "\tmovl %%eax,0xb8(%%esp)\n"); /* Eip */ |
| |
| /* Transfer the arguments */ |
| |
| output( "\tmovl 8(%%ebp),%%ecx\n" ); /* fetch number of args to copy */ |
| output( "\tleal 4(,%%ecx,4),%%edx\n" ); /* add 4 for context arg */ |
| output( "\tsubl %%edx,%%esp\n" ); |
| output( "\tandl $~15,%%esp\n" ); |
| output( "\tleal 20(%%ebp),%%esi\n" ); /* get %esp at time of call */ |
| output( "\tmovl %%esp,%%edi\n" ); |
| output( "\ttest %%ecx,%%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( "\tmovl %%esi,%d(%%ebp)\n", 0xc4 /* Esp */ - STACK_SPACE ); |
| |
| /* Call the entry point */ |
| |
| output( "\tmovl 4(%%ebp),%%eax\n" ); /* get relay code addr */ |
| output( "\taddl 12(%%ebp),%%eax\n" ); |
| output( "\tcall *%%eax\n" ); |
| output( "\tleal -%d(%%ebp),%%ecx\n", STACK_SPACE ); |
| |
| /* Restore the context structure */ |
| |
| output( "2:\tpushl 0x94(%%ecx)\n"); /* SegEs */ |
| output( "\tpopl %%es\n" ); |
| output( "\tpushl 0x90(%%ecx)\n"); /* SegFs */ |
| output( "\tpopl %%fs\n" ); |
| output( "\tpushl 0x8c(%%ecx)\n"); /* SegGs */ |
| output( "\tpopl %%gs\n" ); |
| |
| output( "\tmovl 0x9c(%%ecx),%%edi\n"); /* Edi */ |
| output( "\tmovl 0xa0(%%ecx),%%esi\n"); /* Esi */ |
| output( "\tmovl 0xa8(%%ecx),%%edx\n"); /* Edx */ |
| output( "\tmovl 0xa4(%%ecx),%%ebx\n"); /* Ebx */ |
| output( "\tmovl 0xb0(%%ecx),%%eax\n"); /* Eax */ |
| output( "\tmovl 0xb4(%%ecx),%%ebp\n"); /* Ebp */ |
| |
| output( "\tpushl 0xc8(%%ecx)\n"); /* SegSs */ |
| output( "\tpopl %%ss\n" ); |
| output( "\tmovl 0xc4(%%ecx),%%esp\n"); /* Esp */ |
| |
| output( "\tpushl 0xc0(%%ecx)\n"); /* EFlags */ |
| output( "\tpushl 0xbc(%%ecx)\n"); /* SegCs */ |
| output( "\tpushl 0xb8(%%ecx)\n"); /* Eip */ |
| output( "\tpushl 0x98(%%ecx)\n"); /* SegDs */ |
| output( "\tmovl 0xac(%%ecx),%%ecx\n"); /* Ecx */ |
| |
| output( "\tpopl %%ds\n" ); |
| output( "\tiret\n" ); |
| output_cfi( ".cfi_endproc" ); |
| output_function_size( "__wine_call_from_regs" ); |
| |
| function_header( "__wine_restore_regs" ); |
| output_cfi( ".cfi_startproc" ); |
| output( "\tmovl 4(%%esp),%%ecx\n" ); |
| output( "\tjmp 2b\n" ); |
| output_cfi( ".cfi_endproc" ); |
| output_function_size( "__wine_restore_regs" ); |
| } |
| |
| |
| /******************************************************************* |
| * BuildPendingEventCheck |
| * |
| * Build a function that checks whether there are any |
| * pending DPMI events. |
| * |
| * Stack layout: |
| * |
| * (sp+12) long eflags |
| * (sp+6) long cs |
| * (sp+2) long ip |
| * (sp) word fs |
| * |
| * On entry to function, fs register points to a valid TEB. |
| * On exit from function, stack will be popped. |
| */ |
| static void BuildPendingEventCheck(void) |
| { |
| /* Function header */ |
| |
| function_header( "DPMI_PendingEventCheck" ); |
| |
| /* Check for pending events. */ |
| |
| output( "\t.byte 0x64\n\ttestl $0xffffffff,(%d)\n", VM86_PENDING_OFFSET ); |
| output( "\tje %s\n", asm_name("DPMI_PendingEventCheck_Cleanup") ); |
| output( "\t.byte 0x64\n\ttestl $0xffffffff,(%d)\n", DPMI_VIF_OFFSET ); |
| output( "\tje %s\n", asm_name("DPMI_PendingEventCheck_Cleanup") ); |
| |
| /* Process pending events. */ |
| |
| output( "\tsti\n" ); |
| |
| /* Start cleanup. Restore fs register. */ |
| |
| output( "%s\n", asm_globl("DPMI_PendingEventCheck_Cleanup") ); |
| output( "\tpopw %%fs\n" ); |
| |
| /* Return from function. */ |
| |
| output( "%s\n", asm_globl("DPMI_PendingEventCheck_Return") ); |
| output( "\tiret\n" ); |
| |
| output_function_size( "DPMI_PendingEventCheck" ); |
| } |
| |
| |
| /******************************************************************* |
| * output_asm_relays16 |
| * |
| * Build all the 16-bit relay callbacks |
| */ |
| void output_asm_relays16(void) |
| { |
| /* File header */ |
| |
| output( "\t.text\n" ); |
| output( "%s:\n\n", asm_name("__wine_spec_thunk_text_16") ); |
| |
| output( "%s\n", asm_globl("__wine_call16_start") ); |
| |
| /* Standard CallFrom16 routine */ |
| BuildCallFrom16Core( 0, 0 ); |
| |
| /* Register CallFrom16 routine */ |
| BuildCallFrom16Core( 1, 0 ); |
| |
| /* C16ThkSL CallFrom16 routine */ |
| BuildCallFrom16Core( 0, 1 ); |
| |
| /* Standard CallTo16 routine */ |
| BuildCallTo16Core( 0 ); |
| |
| /* Register CallTo16 routine */ |
| BuildCallTo16Core( 1 ); |
| |
| /* Standard CallTo16 return stub */ |
| BuildRet16Func(); |
| |
| /* CBClientThunkSL routine */ |
| BuildCallTo32CBClient( 0 ); |
| |
| /* CBClientThunkSLEx routine */ |
| BuildCallTo32CBClient( 1 ); |
| |
| /* Pending DPMI events check stub */ |
| BuildPendingEventCheck(); |
| |
| output( "%s\n", asm_globl("__wine_call16_end") ); |
| output_function_size( "__wine_spec_thunk_text_16" ); |
| |
| /* Declare the return address and data selector variables */ |
| output( "\n\t.data\n\t.align %d\n", get_alignment(4) ); |
| output( "%s\n\t.long 0\n", asm_globl("CallTo16_DataSelector") ); |
| output( "%s\n\t.long 0\n", asm_globl("CallTo16_TebSelector") ); |
| |
| output( "\t.text\n" ); |
| output( "%s:\n", asm_name("__wine_spec_thunk_text_32") ); |
| build_call_from_regs_x86(); |
| output_function_size( "__wine_spec_thunk_text_32" ); |
| } |
| |
| |
| /******************************************************************* |
| * output_asm_relays |
| * |
| * Build all the assembly relay callbacks |
| */ |
| void output_asm_relays(void) |
| { |
| switch (target_cpu) |
| { |
| case CPU_x86: |
| build_call_from_regs_x86(); |
| break; |
| default: |
| break; |
| } |
| } |
