long xexec(WORD flag, char *path, char *tail, char *env)
{
PD *p;
PGMHDR01 hdr;
MD *m, *env_md;
LONG rc;
long max, needed;
FH fh;
KDEBUG(("BDOS xexec: flag or mode = %d\n",flag));
/* first branch - actions that do not require loading files */
switch(flag) {
#if DETECT_NATIVE_FEATURES
case PE_RELOCATE: /* internal use only, see bootstrap() in bios/bios.c */
p = (PD *) tail;
rc = kpgm_relocate(p, (long)path);
if (rc) {
KDEBUG(("BDOS xexec: kpgm_reloc returned %ld (0x%lx)\n",rc,rc));
return rc;
}
/* invalidate instruction cache for the TEXT segment only
* programs that jump into their DATA, BSS or HEAP are kindly invited
* to do their cache management themselves.
*/
invalidate_instruction_cache( p+1, p->p_tlen);
return (long)p;
#endif
case PE_BASEPAGE: /* just create a basepage */
path = (char *) 0L; /* (same as basepage+flags with flags set to zero) */
/* drop thru */
case PE_BASEPAGEFLAGS: /* create a basepage, respecting the flags */
env_md = alloc_env(env);
if (env_md == NULL) {
KDEBUG(("BDOS xexec: not enough memory!\n"));
return ENSMEM;
}
m = alloc_tpa((ULONG)path,sizeof(PD),&max);
if (m == NULL) { /* not even enough memory for basepage */
freeit(env_md, &pmd);
KDEBUG(("BDOS xexec: No memory for basepage\n"));
return ENSMEM;
}
p = (PD *) m->m_start;
/* memory ownership */
m->m_own = env_md->m_own = run;
/* initialize the PD */
init_pd_fields(p, tail, max, env_md);
p->p_flags = (ULONG)path; /* set the flags */
init_pd_files(p);
return (long)p;
case PE_GOTHENFREE:
/* set the owner of the memory to be this process */
p = (PD *) tail;
set_owner(p, p, find_mpb(p));
set_owner(p->p_env, p, find_mpb(p->p_env));
/* fall through */
case PE_GO:
p = (PD *) tail;
proc_go(p);
/* should not return ? */
return (long)p;
case PE_LOADGO:
case PE_LOAD:
break;
default:
return EINVFN;
}
/* we now need to load a file */
KDEBUG(("BDOS xexec: trying to find the command ...\n"));
if (ixsfirst(path,0,0L)) {
KDEBUG(("BDOS xexec: command %s not found!!!\n",path));
return EFILNF; /* file not found */
}
/* load the header - if I/O error occurs now, the longjmp in rwabs will
* jump directly back to bdosmain.c, which is not a problem because
* we haven't allocated anything yet.
*/
rc = kpgmhdrld(path, &hdr, &fh);
if (rc) {
KDEBUG(("BDOS xexec: kpgmhdrld returned %ld (0x%lx)\n",rc,rc));
return rc;
}
/* allocate the environment first, always in ST RAM */
env_md = alloc_env(env);
if (env_md == NULL) {
KDEBUG(("BDOS xexec: not enough memory!\n"));
return ENSMEM;
}
/* allocate the basepage depending on memory policy */
needed = hdr.h01_tlen + hdr.h01_dlen + hdr.h01_blen + sizeof(PD);
m = alloc_tpa(hdr.h01_flags,needed,&max);
/* if failed, free env_md and return */
if (m == NULL) {
KDEBUG(("BDOS xexec: no memory for TPA\n"));
freeit(env_md, &pmd);
return ENSMEM;
}
p = (PD *) m->m_start;
/* memory ownership - the owner is either the new process being created,
* or the parent
*/
if (flag == PE_LOADGO) {
m->m_own = env_md->m_own = p;
} else {
m->m_own = env_md->m_own = run;
}
/* initialize the fields in the PD structure */
init_pd_fields(p, tail, max, env_md);
/* set the flags (must be done after init_pd) */
p->p_flags = hdr.h01_flags;
/* use static variable to avoid the obscure longjmp warning */
cur_p = p;
cur_m = m;
cur_env_md = env_md;
/* we have now allocated memory, so we need to intercept longjmp. */
memcpy(bakbuf, errbuf, sizeof(errbuf));
if (setjmp(errbuf)) {
KDEBUG(("Error and longjmp in xexec()!\n"));
/* free any memory allocated yet */
freeit(cur_env_md, &pmd);
freeit(cur_m, find_mpb(cur_m->m_start));
/* we still have to jump back to bdosmain.c so that the proper error
* handling can occur.
*/
longjmp(bakbuf, 1);
}
/* now, load the rest of the program and perform relocation */
rc = kpgmld(cur_p, fh, &hdr);
if (rc) {
KDEBUG(("BDOS xexec: kpgmld returned %ld (0x%lx)\n",rc,rc));
/* free any memory allocated yet */
freeit(cur_env_md, &pmd);
freeit(cur_m, find_mpb(cur_m->m_start));
return rc;
}
/* at this point the program has been correctly loaded in memory, and
* more I/O errors cannot occur, so it is safe now to finish initializing
* the new process.
*/
init_pd_files(cur_p);
/* invalidate instruction cache for the TEXT segment only
* programs that jump into their DATA, BSS or HEAP are kindly invited
* to do their cache management themselves.
*/
invalidate_instruction_cache(((char *)cur_p) + sizeof(PD), hdr.h01_tlen);
if (flag != PE_LOAD)
proc_go(cur_p);
return (long)cur_p;
}
long xexec(WORD flag, char *path, char *tail, char *env)
{
PD *p;
PGMHDR01 hdr;
MD *m, *env_md;
LONG rc;
long max, needed;
FH fh;
D(("BDOS: xexec - flag or mode = %d\n", flag));
/* first branch - actions that do not require loading files */
switch(flag) {
case PE_RELOCATE:
p = (PD *) tail;
rc = kpgm_relocate(p, (long)path);
if(rc) {
D(("BDOS: xexec - kpgm_relloc returned %ld (0x%lx)\n", rc, rc));
return(rc);
}
/* invalidate instruction cache for the TEXT segment only
* programs that jump into their DATA, BSS or HEAP are kindly invited
* to do their cache management themselves.
*/
invalidate_icache( p+1, p->p_tlen);
return (long) p;
case PE_BASEPAGE:
/* just create a basepage */
env_md = alloc_env(env);
if(env_md == NULL) {
D(("xexec: Not Enough Memory!\n"));
return(ENSMEM);
}
max = (long) ffit(-1L, &pmd);
if(max >= sizeof(PD)) {
m = ffit(max, &pmd);
p = (PD *) m->m_start;
} else {
/* not even enough memory for basepage */
freeit(env_md, &pmd);
D(("xexec: No memory for TPA\n"));
return(ENSMEM);
}
/* memory ownership */
m->m_own = env_md->m_own = run;
/* initialize the PD */
init_pd_fields(p, tail, max, env_md);
init_pd_files(p);
return (long) p;
case PE_GOTHENFREE:
/* set the owner of the memory to be this process */
p = (PD *) tail;
set_owner(p, p, find_mpb(p));
set_owner(p->p_env, p, find_mpb(p->p_env));
/* fall through */
case PE_GO:
p = (PD *) tail;
proc_go(p);
/* should not return ? */
return (long)p;
case PE_LOADGO:
case PE_LOAD:
break;
default:
return EINVFN;
}
/* we now need to load a file */
D(("BDOS: xexec - trying to find the command ...\n"));
if (ixsfirst(path,0,0L)) {
D(("BDOS: Command %s not found!!!\n", path));
return(EFILNF); /* file not found */
}
/* load the header - if IO error occurs now, the longjmp in rwabs will
* jump directly back to bdosmain.c, which is not a problem because
* we haven't allocated anything yet.
*/
rc = kpgmhdrld(path, &hdr, &fh);
if(rc) {
D(("BDOS: xexec - kpgmhdrld returned %ld (0x%lx)\n", rc, rc));
return(rc);
}
/* allocate the environment first, always in ST RAM */
env_md = alloc_env(env);
if ( env_md == NULL ) {
D(("xexec: Not Enough Memory!\n"));
return(ENSMEM);
}
/* allocate the basepage depending on memory policy */
needed = hdr.h01_tlen + hdr.h01_dlen + hdr.h01_blen + sizeof(PD);
max = 0;
/* first try */
p = NULL;
m = NULL;
#if CONF_WITH_ALT_RAM
if(has_alt_ram && (hdr.h01_flags & PF_TTRAMLOAD)) {
/* use alternate ram preferably */
max = (long) ffit(-1L, &pmdalt);
if(max >= needed) {
m = ffit(max, &pmdalt);
p = (PD *) m->m_start;
}
}
#endif
/* second try */
if(p == NULL) {
max = (long) ffit(-1L, &pmd);
if(max >= needed) {
m = ffit(max, &pmd);
p = (PD *) m->m_start;
}
}
/* still failed? free env_md and return */
if(p == NULL) {
D(("xexec: No memory for TPA\n"));
freeit(env_md, &pmd);
return(ENSMEM);
}
assert(m != NULL);
/* memory ownership - the owner is either the new process being created,
* or the parent
*/
if(flag == PE_LOADGO) {
m->m_own = env_md->m_own = p;
} else {
m->m_own = env_md->m_own = run;
}
/* initialize the fields in the PD structure */
init_pd_fields(p, tail, max, env_md);
/* set the flags (must be done after init_pd) */
p->p_flags = hdr.h01_flags;
/* use static variable to avoid the obscure longjmp warning */
cur_p = p;
cur_m = m;
cur_env_md = env_md;
/* we have now allocated memory, so we need to intercept longjmp. */
memcpy(bakbuf, errbuf, sizeof(errbuf));
if ( setjmp(errbuf) ) {
kprintf("Error and longjmp in xexec()!\n");
/* free any memory allocated yet */
freeit(cur_env_md, &pmd);
freeit(cur_m, find_mpb((void *)cur_m->m_start));
/* we still have to jump back to bdosmain.c so that the proper error
* handling can occur.
*/
longjmp(bakbuf, 1);
}
/* now, load the rest of the program and perform relocation */
rc = kpgmld(cur_p, fh, &hdr);
if ( rc ) {
D(("BDOS: xexec - kpgmld returned %ld (0x%lx)\n", rc, rc));
/* free any memory allocated yet */
freeit(cur_env_md, &pmd);
freeit(cur_m, find_mpb((void *)cur_m->m_start));
return rc;
}
/* at this point the program has been correctly loaded in memory, and
* more IO errors cannot occur, so it is safe now to finish initializing
* the new process.
*/
init_pd_files(cur_p);
/* invalidate instruction cache for the TEXT segment only
* programs that jump into their DATA, BSS or HEAP are kindly invited
* to do their cache management themselves.
*/
invalidate_icache(((char *)cur_p) + sizeof(PD), hdr.h01_tlen);
if(flag != PE_LOAD)
proc_go(cur_p);
return (long) cur_p;
}
