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https://github.com/reactos/reactos.git
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changed syscall tables. now it mimics NT style.
it has a SSDT a SSPT, a KeServiceDescriptorTable and a KeServiceDescriptorTableShadow. genntdll now also generates some useful defines about min syscall number, max syscall number, and number of syscalls. svn path=/trunk/; revision=958
This commit is contained in:
Hernan Ochoa
parent
1220167730
commit
65a742ceaa
1 changed files with 201 additions and 22 deletions
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@ -1,4 +1,4 @@
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/* $Id: genntdll.c,v 1.8 1999/06/18 22:10:58 ea Exp $
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/* $Id: genntdll.c,v 1.9 2000/01/23 15:14:42 hochoa 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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@ -11,7 +11,7 @@
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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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*/
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/* INCLUDE ******************************************************************/
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@ -28,6 +28,174 @@
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/* FUNCTIONS ****************************************************************/
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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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*/
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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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*/
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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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/* Close the service table (C syntax) */
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fprintf(out,"\n};\n");
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// We write some useful defines
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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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fprintf(out, "#define SSDTSHADOW_MAX_ENTRIES 2\n");
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// Now write the KeServiceDescriptorTable
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fprintf(out, "\n\n// These Service Descriptor Table its exported by NTOSKRNL and can be used\n");
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fprintf(out, "// by Device Drivers to hook system services\n");
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fprintf(out, "\n\nKE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTable = {\n"
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"\t\tMainSSDT,\n"
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"\t\tNULL,\n"
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"\t\tNUMBER_OF_SYSCALLS,\n"
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"\t\tMainSSPT\n\t\t};\n");
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// Now write the KeServiceDescriptorTableShadow
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// This would be used when win32k.sys gets implemented
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fprintf(out, "\n\n// These Service Descriptor Table will be used by the win32k.sys driver\n");
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fprintf(out, "\n\nKE_SERVICE_DESCRIPTOR_TABLE_ENTRY KeServiceDescriptorTableShadow[SSDTSHADOW_MAX_ENTRIES] = {\n"
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"\t\t{ MainSSDT, NULL, NUMBER_OF_SYSCALLS, MainSSPT },\n"
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"\t\t{ NULL, NULL, 0, NULL }\n"
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"};\n");
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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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@ -43,7 +211,7 @@ process(
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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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@ -52,11 +220,14 @@ process(
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/*
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* Service table header
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*/
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fprintf(out2,"// Machine generated, don't edit\n");
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fprintf(out2,"\n\n");
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//Hfprintf(out2,"// Machine generated, don't edit\n");
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//Hfprintf(out2,"\n\n");
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//fprintf(out2,"#include <ntddk.h>");
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fprintf(out2,"\n\n\n");
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fprintf(out2,"SERVICE_TABLE _SystemServiceTable[256] = {\n");
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//H fprintf(out2,"\n\n\n");
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//H fprintf(out2,"SERVICE_TABLE _SystemServiceTable[256] = {\n");
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/*
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* NTOSKRNL Zw functions stubs header
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*/
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@ -72,7 +243,7 @@ process(
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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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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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@ -134,22 +305,25 @@ process(
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fprintf(out,"\t\"lea\t4(%%esp),%%edx\\n\\t\"\n");
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fprintf(out,"\t\"int\t$0x2E\\n\\t\"\n");
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fprintf(out,"\t\"ret\t$%s\\n\\t\");\n\n",nr_args);
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/*
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/*
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* Mark the end of the previous service
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* table's element (C array syntax). When
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* the current function is the n-th, we
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* close the (n - 1)-th entry.
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*/
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if (sys_call_idx > 0)
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{
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fprintf(out2,",\n");
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}
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//Hif (sys_call_idx > 0)
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//H{
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//H fprintf(out2,",\n");
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//H}
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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(out2,"\t\t{ %s, (ULONG)%s }",nr_args,name);
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/*
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//Hfprintf(out2,"\t\t{ %s, (ULONG)%s }",nr_args,name);
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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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@ -164,8 +338,8 @@ process(
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}
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}
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/* Close the service table (C syntax) */
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fprintf(out2,"\n};\n");
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//Hfprintf(out2,"\n};\n");
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return(0);
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}
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@ -188,32 +362,35 @@ int main(int argc, char* argv[])
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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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out = fopen(argv[2],"wb");
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if (out == 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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@ -222,11 +399,13 @@ int main(int argc, char* argv[])
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}
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ret = process(in,out,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(out);
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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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