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Basic VM and other minor improvements.

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Not complete, probably not fully debugged or optimized.
This commit is contained in:
Ben Gras
2008-11-19 12:26:10 +00:00
parent c888305e21
commit c078ec0331
273 changed files with 10814 additions and 4305 deletions
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30
kernel/system/do_exec.c
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@@ -22,7 +22,6 @@ register message *m_ptr; /* pointer to request message */
{
/* Handle sys_exec(). A process has done a successful EXEC. Patch it up. */
register struct proc *rp;
reg_t sp; /* new sp */
phys_bytes phys_name;
char *np;
int proc;
@@ -31,27 +30,18 @@ register message *m_ptr; /* pointer to request message */
return EINVAL;
rp = proc_addr(proc);
sp = (reg_t) m_ptr->PR_STACK_PTR;
rp->p_reg.sp = sp; /* set the stack pointer */
#if (_MINIX_CHIP == _CHIP_INTEL)
/* wipe extra LDT entries */
phys_memset(vir2phys(&rp->p_seg.p_ldt[EXTRA_LDT_INDEX]), 0,
(LDT_SIZE - EXTRA_LDT_INDEX) * sizeof(rp->p_seg.p_ldt[0]));
#endif
rp->p_reg.pc = (reg_t) m_ptr->PR_IP_PTR; /* set pc */
RTS_LOCK_UNSET(rp, RECEIVING); /* PM does not reply to EXEC call */
/* Save command name for debugging, ps(1) output, etc. */
phys_name = numap_local(who_p, (vir_bytes) m_ptr->PR_NAME_PTR,
(vir_bytes) P_NAME_LEN - 1);
if (phys_name != 0) {
phys_copy(phys_name, vir2phys(rp->p_name), (phys_bytes) P_NAME_LEN - 1);
for (np = rp->p_name; (*np & BYTE) >= ' '; np++) {}
*np = 0; /* mark end */
} else {
if(data_copy(who_e, (vir_bytes) m_ptr->PR_NAME_PTR,
SYSTEM, (vir_bytes) rp->p_name, (phys_bytes) P_NAME_LEN - 1) != OK)
strncpy(rp->p_name, "<unset>", P_NAME_LEN);
}
/* Do architecture-specific exec() stuff. */
arch_pre_exec(rp, (u32_t) m_ptr->PR_IP_PTR, (u32_t) m_ptr->PR_STACK_PTR);
/* No reply to EXEC call */
RTS_LOCK_UNSET(rp, RECEIVING);
return(OK);
}
#endif /* USE_EXEC */