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/*
* elfspe - A wrapper to allow direct execution of SPE binaries
* Copyright (C) 2005 IBM Corp.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _XOPEN_SOURCE 600
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "libspe2.h"
#ifndef LS_SIZE
#define LS_SIZE 0x40000 /* 256K (in bytes) */
#endif /* LS_SIZE */
static struct spe_context *ctx;
static void handler (int signr ) __attribute__ ((noreturn));
static void
handler (int signr)
{
if (ctx)
spe_context_destroy(ctx);
fprintf (stderr, "Killed by signal %d\n", signr);
exit (128 + signr);
}
struct spe_regs {
unsigned int r3[4];
unsigned int r4[4];
unsigned int r5[4];
};
/* spe_copy_argv - setup C99-style argv[] region for SPE main().
*
* Duplicate command line arguments and set up argv pointers
* to be absolute LS offsets, allowing SPE program to directly
* reference these strings from its own LS.
*
* An SPE entry function (crt0.o) can take the data from spe_regs
* and copy the argv region from EA to the top of LS (largest addr),
* and set $SP per ABI requirements. Currently, this looks something
* like:
*
* +-----+ 0
* | txt |
* |-----|
* | |
* | ^ |
* | | |
* | | |
* |stack|
* |-----| ls_dst (LS_SIZE-nbytes)
* | args|
* +-----+ LS_SIZE
*/
static int
spe_copy_argv(int argc, char **argv, struct spe_regs *ret)
{
unsigned int *argv_offsets;
void *start = NULL;
char *ptr, *end;
union {
unsigned long long ull;
unsigned int ui[2];
} addr64;
int spe_arg_max = 4096;
int i, nbytes = 0;
memset(ret, 0, sizeof(struct spe_regs));
if ((argc <= 0) || getenv("SPE_NO_ARGS")) {
return 0;
}
if (getenv("SPE_ARG_MAX")) {
int v;
v = strtol((const char *) getenv("SPE_ARG_MAX"), (char **) NULL,
0);
if ((v >= 0) && (v <= spe_arg_max))
spe_arg_max = v & ~(15);
}
for (i = 0; i < argc; i++) {
nbytes += strlen(argv[i]) + 1;
}
nbytes += ((argc + 1) * sizeof(unsigned int));
nbytes = (nbytes + 15) & ~(15);
if (nbytes > spe_arg_max) {
return 2;
}
posix_memalign(&start, 16, nbytes);
if (!start) {
return 3;
}
addr64.ull = (unsigned long long) ((unsigned long) start);
memset(start, 0, nbytes);
ptr = (char *)start;
end = (char *)start + nbytes;
argv_offsets = (unsigned int *) ptr;
ptr += ((argc + 1) * sizeof(unsigned int));
for (i = 0; i < argc; i++) {
int len = strlen(argv[i]) + 1;
argv_offsets[i] = LS_SIZE - ((unsigned int) (end - ptr));
argv_offsets[i] &= LS_SIZE-1;
memcpy(ptr, argv[i], len);
ptr += len;
}
argv_offsets[argc] = NULL;
ret->r3[0] = argc;
ret->r4[0] = LS_SIZE - nbytes;
ret->r4[1] = addr64.ui[0];
ret->r4[2] = addr64.ui[1];
ret->r4[3] = nbytes;
return 0;
}
int
main (int argc, char **argv)
{
int flags = 0;
unsigned int entry = SPE_DEFAULT_ENTRY;
struct spe_regs params;
int rc;
spe_stop_info_t stop_info;
spe_program_handle_t *spe_handle;
signal (SIGSEGV, handler);
signal (SIGBUS, handler);
signal (SIGILL, handler);
signal (SIGFPE, handler);
signal (SIGTERM, handler);
signal (SIGHUP, handler);
signal (SIGINT, handler);
if (argc < 2) {
fprintf (stderr, "Usage: elfspe [spe-elf]\n");
exit (1);
}
spe_handle = spe_image_open (argv[1]);
if (!spe_handle) {
perror (argv[1]);
exit (1);
}
if (spe_copy_argv(argc-1, &argv[1], ¶ms)) {
perror ("spe_copy_argv");
exit (1);
}
ctx = spe_context_create(flags, NULL);
if (ctx == NULL) {
perror("spe_create_single");
exit(1);
}
if (spe_program_load(ctx, spe_handle)) {
perror("spe_load");
exit(1);
}
rc = spe_context_run(ctx, &entry, SPE_RUN_USER_REGS, ¶ms, NULL, &stop_info);
if (rc < 0)
perror("spe_run");
spe_context_destroy(ctx);
return stop_info.result.spe_exit_code;
}
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