115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*
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* DLL imports support
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*
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* Copyright 2000 Alexandre Julliard
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "winnt.h"
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#include "build.h"
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struct import
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{
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char *dll; /* dll name */
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char **imports; /* functions we want to import from this dll */
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int nb_imports; /* number of imported functions */
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};
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static struct import **dll_imports = NULL;
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static int nb_imports = 0; /* number of imported dlls */
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static int total_imports = 0; /* total number of imported functions */
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/* add a dll to the list of imports */
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void add_import_dll( const char *name )
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{
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struct import *imp = xmalloc( sizeof(*imp) );
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imp->dll = xstrdup( name );
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imp->imports = NULL;
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imp->nb_imports = 0;
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dll_imports = xrealloc( dll_imports, (nb_imports+1) * sizeof(*dll_imports) );
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dll_imports[nb_imports++] = imp;
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}
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#ifdef notyet
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/* add a function to the list of imports from a given dll */
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static void add_import_func( struct import *imp, const char *name )
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{
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imp->imports = xrealloc( imp->imports, (imp->nb_imports+1) * sizeof(*imp->imports) );
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imp->imports[imp->nb_imports++] = xstrdup( name );
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total_imports++;
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}
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#endif
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/* output the import table of a Win32 module */
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int output_imports( FILE *outfile )
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{
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int i, j, pos;
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if (!nb_imports) goto done;
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/* main import header */
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fprintf( outfile, "\n\n/* imports */\n\n" );
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fprintf( outfile, "static struct {\n" );
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fprintf( outfile, " struct {\n" );
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fprintf( outfile, " void *OriginalFirstThunk;\n" );
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fprintf( outfile, " unsigned int TimeDateStamp;\n" );
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fprintf( outfile, " unsigned int ForwarderChain;\n" );
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fprintf( outfile, " const char *Name;\n" );
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fprintf( outfile, " void *FirstThunk;\n" );
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fprintf( outfile, " } imp[%d];\n", nb_imports+1 );
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fprintf( outfile, " const char *data[%d];\n", total_imports + nb_imports );
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fprintf( outfile, "} imports = {\n {\n" );
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/* list of dlls */
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for (i = j = 0; i < nb_imports; i++)
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{
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fprintf( outfile, " { 0, 0, 0, \"%s\", &imports.data[%d] },\n",
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dll_imports[i]->dll, j );
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j += dll_imports[i]->nb_imports + 1;
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}
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fprintf( outfile, " { 0, 0, 0, 0, 0 },\n" );
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fprintf( outfile, " },\n {\n" );
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/* list of imported functions */
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for (i = 0; i < nb_imports; i++)
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{
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fprintf( outfile, " /* %s */\n", dll_imports[i]->dll );
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for (j = 0; j < dll_imports[i]->nb_imports; j++)
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fprintf( outfile, " \"\\0\\0%s\",\n", dll_imports[i]->imports[j] );
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fprintf( outfile, " 0,\n" );
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}
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fprintf( outfile, " }\n};\n\n" );
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/* thunks for imported functions */
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fprintf( outfile, "#ifndef __GNUC__\nstatic void __asm__dummy_import(void) {\n#endif\n\n" );
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pos = 20 * (nb_imports + 1); /* offset of imports.data from start of imports */
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fprintf( outfile, "asm(\".align 4\");\n" );
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for (i = 0; i < nb_imports; i++, pos += 4)
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{
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for (j = 0; j < dll_imports[i]->nb_imports; j++, pos += 4)
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{
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fprintf( outfile,
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"asm(\".type " PREFIX "%s,@function\\n\\t"
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".globl " PREFIX "%s\\n"
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PREFIX "%s:\\tjmp *(imports+%d)\\n\\t"
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"movl %%esi,%%esi\");\n",
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dll_imports[i]->imports[j], dll_imports[i]->imports[j],
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dll_imports[i]->imports[j], pos );
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}
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}
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fprintf( outfile, "#ifndef __GNUC__\n}\n#endif\n\n" );
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done:
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return nb_imports;
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}
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