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https://github.com/reactos/reactos.git
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393 lines
9.2 KiB
C
393 lines
9.2 KiB
C
/* $Id: genntdll.c,v 1.1 2004/02/06 08:21:56 fireball Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS version of ntdll
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* FILE: iface/native/genntdll.c
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* PURPOSE: Generates the system call stubs in ntdll
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* CHANGE HISTORY: Added a '@xx' to deal with stdcall [ Ariadne ]
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* 19990616 (ea)
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* Four arguments now required; 4th is the file
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* for ntoskrnl ZwXXX functions (which are merely calls
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* to twin NtXXX calls, via int 0x2e (x86).
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* 19990617 (ea)
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* Fixed a bug in function numbers in kernel ZwXXX stubs.
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*
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*/
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/* INCLUDE ******************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define PARAMETERIZED_LIBS
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/* #define VERBOSE */
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#define INPUT_BUFFER_SIZE 255
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/* FUNCTIONS ****************************************************************/
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void write_syscall_stub(FILE* out, FILE* out3, char* name, char* name2,
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char* nr_args, unsigned int sys_call_idx)
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{
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int i;
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int nArgBytes = atoi(nr_args);
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#ifdef PARAMETERIZED_LIBS
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fprintf(out,"__asm__(\"\\n\\t.global _%s@%s\\n\\t\"\n",name,nr_args);
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fprintf(out,"\".global _%s@%s\\n\\t\"\n",name2,nr_args);
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fprintf(out,"\"_%s@%s:\\n\\t\"\n",name,nr_args);
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fprintf(out,"\"_%s@%s:\\n\\t\"\n",name2,nr_args);
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#else
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fprintf(out,"__asm__(\"\\n\\t.global _%s\\n\\t\"\n",name);
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fprintf(out,"\".global _%s\\n\\t\"\n",name2);
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fprintf(out,"\"_%s:\\n\\t\"\n",name);
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fprintf(out,"\"_%s:\\n\\t\"\n",name2);
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#endif
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fprintf(out,"\t\"pushl\t%%ebp\\n\\t\"\n");
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fprintf(out,"\t\"movl\t%%esp, %%ebp\\n\\t\"\n");
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fprintf(out,"\t\"mov\t$%d,%%eax\\n\\t\"\n",sys_call_idx);
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fprintf(out,"\t\"lea\t8(%%ebp),%%edx\\n\\t\"\n");
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fprintf(out,"\t\"int\t$0x2E\\n\\t\"\n");
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fprintf(out,"\t\"popl\t%%ebp\\n\\t\"\n");
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fprintf(out,"\t\"ret\t$%s\\n\\t\");\n\n",nr_args);
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/*
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* Now write the NTOSKRNL stub for the
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* current system call. ZwXXX does NOT
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* alias the corresponding NtXXX call.
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*/
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#if 0
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fprintf(out3,"__asm__(\n");
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fprintf(out3,"\".global _%s@%s\\n\\t\"\n",name2,nr_args);
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fprintf(out3,"\"_%s@%s:\\n\\t\"\n",name2,nr_args);
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fprintf(out3,"\t\"pushl\t%%ebp\\n\\t\"\n");
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fprintf(out3,"\t\"movl\t%%esp, %%ebp\\n\\t\"\n");
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fprintf(out3,"\t\"mov\t$%d,%%eax\\n\\t\"\n",sys_call_idx);
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fprintf(out3,"\t\"lea\t8(%%ebp),%%edx\\n\\t\"\n");
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fprintf(out3,"\t\"int\t$0x2E\\n\\t\"\n");
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fprintf(out3,"\t\"popl\t%%ebp\\n\\t\"\n");
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fprintf(out3,"\t\"ret\t$%s\\n\\t\");\n\n",nr_args);
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#else
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fprintf(out3,"__declspec(naked) __stdcall\n");
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fprintf(out3,"%s(", name2); // make it emit callconv, reval and full signature too
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for (i=0; i*4 < nArgBytes; ++i) {
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fprintf(out3,"int dummy%d", i);
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if (((i+1)*4) < nArgBytes) fprintf(out3,",");
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}
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fprintf(out3,")\n{\n");
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fprintf(out3,"\t__asm {\n");
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fprintf(out3,"\t\tpush\tebp\n");
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fprintf(out3,"\t\tmov\tebp, esp\n");
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fprintf(out3,"\t\tmov\teax,%d\n",sys_call_idx);
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fprintf(out3,"\t\tlea\tedx, 8[ebp]\n");
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fprintf(out3,"\t\tint\t0x2E\n");
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fprintf(out3,"\t\tpop\tebp\n");
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fprintf(out3,"\t\tret\t%s\n",nr_args);
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fprintf(out3,"\t}\n");
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fprintf(out3,"}\n\n");
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#endif
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}
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int makeSystemServiceTable(FILE *in, FILE *out)
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{
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char line [INPUT_BUFFER_SIZE];
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char *s;
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char *name;
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char *name2;
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int sys_call_idx;
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char *nr_args;
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char *stmp;
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/*
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* Main SSDT Header
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*/
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fprintf(out,"// Machine generated, don't edit\n");
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fprintf(out,"\n\n");
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/*
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* First we build the Main SSDT
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*/
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fprintf(out,"\n\n\n");
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fprintf(out,"SSDT MainSSDT[] = {\n");
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for ( /* First system call has index zero */
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sys_call_idx = 0;
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/* Go on until EOF or read zero bytes */
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( (!feof(in))
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&& (fgets(line, sizeof line, in) != NULL)
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);
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/* Next system call index */
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sys_call_idx++
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)
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{
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if ((s = (char *) strchr(line,'\r')) != NULL)
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{
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*s = '\0';
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}
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/*
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* Skip comments (#) and empty lines.
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*/
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s = & line[0];
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if ((*s) != '#' && (*s) != '\0')
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{
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/* Extract the NtXXX name */
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name = (char *)strtok(s," \t");
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/* Extract the ZwXXX name */
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name2 = (char *)strtok(NULL," \t");
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//value = strtok(NULL," \t");
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/* Extract the stack size */
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nr_args = (char *)strtok(NULL," \t");
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/*
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* Remove, if present, the trailing LF.
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*/
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if ((stmp = strchr(nr_args, '\n')) != NULL)
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{
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*stmp = '\0';
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}
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#ifdef VERBOSE
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printf("%3d \"%s\"\n",sys_call_idx,name);
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#endif
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if (sys_call_idx > 0)
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{
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fprintf(out,",\n");
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}
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/*
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* Now write the current system call's name
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* in the service table.
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*/
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fprintf(out,"\t\t{ (ULONG)%s }",name);
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}
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}
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/* Close the service table (C syntax) */
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fprintf(out,"\n};\n");
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/*
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* Now we build the Main SSPT
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*/
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rewind(in);
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fprintf(out,"\n\n\n");
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fprintf(out,"SSPT MainSSPT[] = {\n");
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for ( /* First system call has index zero */
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sys_call_idx = 0;
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/* Go on until EOF or read zero bytes */
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( (!feof(in))
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&& (fgets(line, sizeof line, in) != NULL)
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);
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/* Next system call index */
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sys_call_idx++
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)
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{
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if ((s = (char *) strchr(line,'\r')) != NULL)
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{
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*s = '\0';
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}
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/*
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* Skip comments (#) and empty lines.
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*/
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s = & line[0];
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if ((*s) != '#' && (*s) != '\0')
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{
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/* Extract the NtXXX name */
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name = (char *)strtok(s," \t");
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/* Extract the ZwXXX name */
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name2 = (char *)strtok(NULL," \t");
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//value = strtok(NULL," \t");
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/* Extract the stack size */
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nr_args = (char *)strtok(NULL," \t");
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/*
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* Remove, if present, the trailing LF.
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*/
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if ((stmp = strchr(nr_args, '\n')) != NULL)
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{
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*stmp = '\0';
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}
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#ifdef VERBOSE
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printf("%3d \"%s\"\n",sys_call_idx,name);
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#endif
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if (sys_call_idx > 0)
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{
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fprintf(out,",\n");
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}
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/*
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* Now write the current system call's ID
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* in the service table along with its Parameters Size.
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*/
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fprintf(out,"\t\t{ %s }",nr_args);
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}
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}
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/*
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* Close the service table (C syntax)
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*/
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fprintf(out,"\n};\n");
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/*
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* We write some useful defines
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*/
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fprintf(out, "\n\n#define MIN_SYSCALL_NUMBER 0\n");
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fprintf(out, "#define MAX_SYSCALL_NUMBER %d\n", sys_call_idx-1);
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fprintf(out, "#define NUMBER_OF_SYSCALLS %d\n", sys_call_idx);
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return(0);
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}
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int
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process(
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FILE * in,
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FILE * out,
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FILE * out2,
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FILE * out3
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)
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{
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char line [INPUT_BUFFER_SIZE];
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char * s;
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char * name; /* NtXXX name */
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char * name2; /* ZwXXX name */
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int sys_call_idx; /* NtXXX index number in the service table */
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char * nr_args; /* stack_size / machine_word_size */
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char * stmp;
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/*
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* NTDLL stubs file header
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*/
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fprintf(out,"// Machine generated, don't edit\n");
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fprintf(out,"\n\n");
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/*
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* NTOSKRNL Zw functions stubs header
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*/
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fprintf(out3,"// Machine generated by genntdll, don't edit\n");
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fprintf(out3,"\n\n");
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/*
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* Scan the database. DB is a text file; each line
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* is a record, which contains data for one system
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* function. Each record has three columns:
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*
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* NT_NAME (e.g. NtCreateProcess)
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* ZW_NAME (e.g. ZwCreateProcess)
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* STACK_SIZE (in machine words: for x[3456]86
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* processors a machine word is 4 bytes)
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*/
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for ( /* First system call has index zero */
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sys_call_idx = 0;
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/* Go on until EOF or read zero bytes */
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( (!feof(in))
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&& (fgets(line, sizeof line, in) != NULL)
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);
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/* Next system call index */
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sys_call_idx++
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)
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{
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/*
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* Remove, if present, the trailing CR.
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* (os specific?)
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*/
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if ((s = (char *) strchr(line,'\r')) != NULL)
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{
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*s = '\0';
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}
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/*
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* Skip comments (#) and empty lines.
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*/
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s = & line[0];
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if ((*s) != '#' && (*s) != '\0')
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{
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/* Extract the NtXXX name */
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name = (char *)strtok(s," \t");
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/* Extract the ZwXXX name */
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name2 = (char *)strtok(NULL," \t");
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//value = strtok(NULL," \t");
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/* Extract the stack size */
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nr_args = (char *)strtok(NULL," \t");
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/*
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* Remove, if present, the trailing LF.
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*/
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if ((stmp = strchr(nr_args, '\n')) != NULL)
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{
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*stmp = '\0';
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}
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#ifdef VERBOSE
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printf("%3d \"%s\"\n",sys_call_idx,name);
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#endif
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/*
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* Write the NTDLL stub for the current
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* system call: NtXXX and ZwXXX symbols
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* are aliases.
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*/
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write_syscall_stub(out, out3, name, name2,
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nr_args, sys_call_idx);
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}
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}
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return(0);
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}
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void usage(char * argv0)
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{
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printf("Usage: %s sysfuncs.lst napi.c napi.h zw.c\n"
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" sysfuncs.lst system functions database\n"
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" napi.c NTDLL stubs\n"
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" napi.h NTOSKRNL service table\n"
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" zw.c NTOSKRNL Zw stubs\n",
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argv0
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);
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}
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int main(int argc, char* argv[])
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{
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FILE * in; /* System calls database */
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FILE * out1; /* NTDLL stubs */
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FILE * out2; /* SERVICE_TABLE */
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FILE * out3; /* NTOSKRNL Zw stubs */
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int ret;
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if (argc != 5)
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{
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usage(argv[0]);
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return(1);
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}
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in = fopen(argv[1],"rb");
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if (in == NULL)
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{
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perror("Failed to open input file (system calls database)");
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return(1);
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}
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out1 = fopen(argv[2],"wb");
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if (out1 == NULL)
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{
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perror("Failed to open output file (NTDLL stubs)");
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return(1);
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}
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out2 = fopen(argv[3],"wb");
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if (out2 == NULL)
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{
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perror("Failed to open output file (NTOSKRNL service table)");
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return(1);
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}
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out3 = fopen(argv[4],"wb");
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if (out3 == NULL)
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{
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perror("Failed to open output file (NTOSKRNL Zw stubs)");
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return(1);
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}
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ret = process(in,out1,out2,out3);
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rewind(in);
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ret = makeSystemServiceTable(in, out2);
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fclose(in);
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fclose(out1);
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fclose(out2);
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fclose(out3);
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return(ret);
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}
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