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Al's patch sent Fri aug 5

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This commit is contained in:
Ben Gras 2005-08-05 16:56:02 +00:00
parent a852be1357
commit 5d2588aedf
2 changed files with 14 additions and 3 deletions
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13
servers/pm/break.c
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@ -114,8 +114,13 @@ vir_bytes sp; /* new value of sp */
/* Do the new data and stack segment sizes fit in the address space? */
ft = (rmp->mp_flags & SEPARATE);
#if (CHIP == INTEL && _WORD_SIZE == 2)
r = size_ok(ft, rmp->mp_seg[T].mem_len, rmp->mp_seg[D].mem_len,
rmp->mp_seg[S].mem_len, rmp->mp_seg[D].mem_vir, rmp->mp_seg[S].mem_vir);
#else
r = (rmp->mp_seg[D].mem_vir + rmp->mp_seg[D].mem_len >
rmp->mp_seg[S].mem_vir) ? ENOMEM : OK;
#endif
if (r == OK) {
if (changed) sys_newmap((int)(rmp - mproc), rmp->mp_seg);
return(OK);
@ -131,7 +136,7 @@ vir_bytes sp; /* new value of sp */
return(ENOMEM);
}
#if (CHIP == INTEL && _WORD_SIZE == 2)
/*===========================================================================*
* size_ok *
*===========================================================================*/
@ -150,7 +155,6 @@ vir_clicks s_vir; /* virtual address for start of stack seg */
* is needed, since the data and stack may not exceed 4096 clicks.
*/
#if (CHIP == INTEL && _WORD_SIZE == 2)
int pt, pd, ps; /* segment sizes in pages */
pt = ( (tc << CLICK_SHIFT) + PAGE_SIZE - 1)/PAGE_SIZE;
@ -162,9 +166,12 @@ vir_clicks s_vir; /* virtual address for start of stack seg */
} else {
if (pt + pd + ps > MAX_PAGES) return(ENOMEM);
}
#endif
if (dvir + dc > s_vir) return(ENOMEM);
return(OK);
}
#endif

4
servers/pm/exec.c
View file

@ -275,7 +275,11 @@ vir_bytes *pc; /* program entry point (initial PC) */
if (dc >= totc) return(ENOEXEC); /* stack must be at least 1 click */
dvir = (*ft == SEPARATE ? 0 : tc);
s_vir = dvir + (totc - sc);
#if (CHIP == INTEL && _WORD_SIZE == 2)
m = size_ok(*ft, tc, dc, sc, dvir, s_vir);
#else
m = (dvir + dc > s_vir) ? ENOMEM : OK;
#endif
ct = hdr.a_hdrlen & BYTE; /* header length */
if (ct > A_MINHDR) lseek(fd, (off_t) ct, SEEK_SET); /* skip unused hdr */
return(m);