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Amiga Format CD 52
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Amiga Format AFCD52 (Issue 136, May 2000).iso
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programming
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mesa
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mesa-tk
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glue
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genglue.in
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2000-02-23
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6KB
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227 lines
#include <sys/types.h>
#include <sys/syscall.h>
#include <stdio.h>
struct syscall {
char *name;
int vec;
} syscalls[] = {
#define SYSTEM_CALL(func,vec) { #func, vec},
#include "../include/GL/gl@TARGET@_calls.def"
#undef SYSTEM_CALL
};
int nsyscall = sizeof(syscalls) / sizeof (syscalls[0]);
#define MesaGL@TARGET@BASE "_MesaGL@TARGET@base"
#define MesaGL@TARGET@BASELEN (sizeof(MesaGL@TARGET@BASE) - 1)
#define BASEREL_OFFSET1 19
#define BASEREL_OFFSET2 31
/* The following code is a hexdump of this assembly program:
.globl _FUNCTION
_FUNCTION: movel a4@(_MesaGL@TARGET@base:W),a0
jmp a0@(OFFSET:w)
*/
static short baserel_code[] = {
0x0000, 0x0107, 0x0000, 0x0008, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0018, 0x0000, 0x0000, 0x0000, 0x0008, 0x0000, 0x0000,
0x206c, 0x0000, 0x4ee8, 0xff46, 0x0000, 0x0002, 0x0000, 0x0138,
0x0000, 0x0004, 0x0500, 0x0000, 0x0000, 0x0000, 0x0000, 0x0011,
0x0100, 0x0000, 0x0000, 0x0000
};
#define LARGE_BASEREL_OFFSET1 21
#define LARGE_BASEREL_OFFSET2 33
/* The following code is a hexdump of this assembly program:
.globl _FUNCTION
_FUNCTION: movel a4@(_MesaGL@TARGET@base:L),a0
jmp a0@(OFFSET:w)
*/
static short large_baserel_code[] = {
0x0000, 0x0107, 0x0000, 0x000c, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0018, 0x0000, 0x0000, 0x0000, 0x0008, 0x0000, 0x0000,
0x2074, 0x0170, 0x0000, 0x0000, 0x4ee8, 0xffe2, 0x0000, 0x0004,
0x0000, 0x0158, 0x0000, 0x0004, 0x0500, 0x0000, 0x0000, 0x0000,
0x0000, 0x000e, 0x0100, 0x0000, 0x0000, 0x0000
};
#define NO_BASEREL_OFFSET1 20
#define NO_BASEREL_OFFSET2 33
/* The following code is a hexdump of this assembly program:
.globl _FUNCTION
_FUNCTION: movel _MesaGL@TARGET@base,a0
jmp a0@(OFFSET:w)
*/
static short no_baserel_code[] = {
0x0000, 0x0107, 0x0000, 0x000c, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0018, 0x0000, 0x0000, 0x0000, 0x0008, 0x0000, 0x0000,
0x2079, 0x0000, 0x0000, 0x4ee8, 0xffe2, 0x0000, 0x0000, 0x0002,
0x0000, 0x0150, 0x0000, 0x0004, 0x0500, 0x0000, 0x0000, 0x0000,
0x0000, 0x000b, 0x0100, 0x0000, 0x0000, 0x0000
};
#define PROFILING_OFFSET1 29
#define PROFILING_OFFSET2 51
#define PROFILING_OFFSET3 57
#define PROFILING_OFFSET4 63
/* The following code is a hexdump of this assembly program:
.globl _FUNCTION
_FUNCTION:
.data
PROFFUNCTION:
.long 0
.text
link a5,#0
lea PROFFUNCTION,a0
jsr mcount
unlk a5
movel _MesaGL@TARGET@base,a0
jmp a0@(OFFSET:w)
*/
static short profiling_code[] = {
0x0000, 0x0107, 0x0000, 0x001c, 0x0000, 0x0004, 0x0000, 0x0000,
0x0000, 0x0030, 0x0000, 0x0000, 0x0000, 0x0018, 0x0000, 0x0000,
0x4e55, 0x0000, 0x41f9, 0x0000, 0x001c, 0x4eb9, 0x0000, 0x0000,
0x4e5d, 0x2079, 0x0000, 0x0000, 0x4ee8, 0xffe2, 0x0000, 0x0000,
0x0000, 0x0006, 0x0000, 0x0640, 0x0000, 0x000c, 0x0000, 0x0250,
0x0000, 0x0014, 0x0000, 0x0350, 0x0000, 0x0004, 0x0500, 0x0000,
0x0000, 0x0000, 0x0000, 0x000b, 0x0600, 0x0000, 0x0000, 0x001c,
0x0000, 0x0015, 0x0100, 0x0000, 0x0000, 0x0000, 0x0000, 0x001c,
0x0100, 0x0000, 0x0000, 0x0000
};
void usage(void)
{
fprintf(stderr, "Usage: gen_glue baserel | large-baserel | no-baserel | profiling\n");
exit(1);
}
void write_code(short *code, int len, FILE *f)
{
const short endian = 0x0100;
/* test if gen_glue is compiled on a big or little endian machine */
if (((char *)&endian)[0])
{
fwrite(code, len, 1, f); /* big endian */
}
else
{
int i;
for (i = 0; i < len / 2; i++)
{
short x = code[i]; /* little endian */
fputc(((char *)&x)[1], f);
fputc(((char *)&x)[0], f);
}
}
}
int main(int argc, char **argv)
{
FILE *fp;
struct syscall *sc;
int i, v, baserel = 0, profiling = 0, lbaserel = 0;
short *code;
int offset1, offset2, size;
int zero = 0;
if (argc != 2)
usage();
if (!strcmp(argv[1], "baserel"))
baserel = 1;
else if (!strcmp(argv[1], "baserel32"))
lbaserel = 1;
else if (!strcmp(argv[1], "profiling"))
profiling = 1;
else if (strcmp(argv[1], "no-baserel"))
usage();
for (i = 0, sc = syscalls; i < nsyscall; i++, sc++)
{
int namelen = strlen(sc->name);
char name[namelen + 3];
if (!memcmp(sc->name, "__obsolete", 10))
continue;
if (!memcmp(sc->name, "__must_recompile", 16))
continue;
if (!memcmp(sc->name, "__stk", 5))
continue;
v = -(sc->vec + 4) * 6;
sprintf (name, "%s.o", sc->name);
fp = fopen (name, "w");
if (!fp)
{
perror (sc->name);
exit (20);
}
code = no_baserel_code;
size = sizeof(no_baserel_code);
offset1 = NO_BASEREL_OFFSET1;
offset2 = NO_BASEREL_OFFSET2;
if (profiling)
{
profiling_code[PROFILING_OFFSET1] = v;
profiling_code[PROFILING_OFFSET2] = 6 + namelen;
profiling_code[PROFILING_OFFSET3] = 6 + namelen * 2 + 5;
profiling_code[PROFILING_OFFSET4] = 6 + namelen * 2 + 5 + 7;
write_code(profiling_code, sizeof(profiling_code), fp);
fwrite(&zero, 3, 1, fp);
fputc((char)(namelen * 2 + 7 + MesaGL@TARGET@BASELEN + 1 + 7 + 4), fp);
fputc('_', fp);
fwrite(sc->name, namelen + 1, 1, fp);
fprintf(fp, "PROF");
fwrite(sc->name, namelen + 1, 1, fp);
fwrite("mcount", 7, 1, fp);
}
else
{
if (baserel && sc->vec != SYS_ix_geta4)
{
code = baserel_code;
size = sizeof(baserel_code);
offset1 = BASEREL_OFFSET1;
offset2 = BASEREL_OFFSET2;
}
else if (lbaserel && sc->vec != SYS_ix_geta4)
{
code = large_baserel_code;
size = sizeof(large_baserel_code);
offset1 = LARGE_BASEREL_OFFSET1;
offset2 = LARGE_BASEREL_OFFSET2;
}
code[offset1] = v;
code[offset2] = namelen + 4 + 2;
write_code(code, size, fp);
fwrite(&zero, 3, 1, fp);
fputc((char)(namelen + 2 + MesaGL@TARGET@BASELEN + 1 + 4), fp);
fputc('_', fp);
fwrite(sc->name, namelen + 1, 1, fp);
}
fwrite(MesaGL@TARGET@BASE, MesaGL@TARGET@BASELEN + 1, 1, fp);
fclose (fp);
}
exit(0);
}