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Enable linux thread support on the alpha. The guts of linux_clone was

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mainly cut-n-pasted from the i386 port, except for the method of setting
the child's stack which is the only MD part of this function.

I've tested with the example apps shipped with the linux threads source
code (ex1-ex6) and with several binary builds of Mozilla.
This commit is contained in:
Andrew Gallatin 2000-11-10 23:04:31 +00:00
parent f16647740e
commit 922683e01a
1 changed files with 57 additions and 1 deletions
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58
sys/alpha/linux/linux_machdep.c
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@ -33,6 +33,7 @@
#include <sys/mount.h>
#include <sys/sysproto.h>
#include <sys/systm.h>
#include <sys/unistd.h>
#include <vm/vm.h>
#include <vm/pmap.h>
@ -115,7 +116,62 @@ linux_vfork(struct proc *p, struct linux_vfork_args *args)
int
linux_clone(struct proc *p, struct linux_clone_args *args)
{
return ENOSYS;
int error, ff = RFPROC;
struct proc *p2;
int exit_signal;
vm_offset_t start;
struct rfork_args rf_args;
#ifdef DEBUG
if (args->flags & CLONE_PID)
printf("linux_clone(%ld): CLONE_PID not yet supported\n",
(long)p->p_pid);
uprintf("linux_clone(%ld): invoked with flags 0x%x and stack %p\n",
(long)p->p_pid, (unsigned int)args->flags,
args->stack);
#endif
if (!args->stack)
return (EINVAL);
exit_signal = args->flags & 0x000000ff;
if (exit_signal >= LINUX_NSIG)
return (EINVAL);
/* if (exit_signal <= LINUX_SIGTBLSZ)
exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
*/
/* RFTHREAD probably not necessary here, but it shouldn't hurt */
ff |= RFTHREAD;
if (args->flags & CLONE_VM)
ff |= RFMEM;
if (args->flags & CLONE_SIGHAND)
ff |= RFSIGSHARE;
if (!(args->flags & CLONE_FILES))
ff |= RFFDG;
error = 0;
start = 0;
rf_args.flags = ff;
if ((error = rfork(p, &rf_args)) != 0)
return (error);
p2 = pfind(p->p_retval[0]);
if (p2 == 0)
return (ESRCH);
p2->p_sigparent = exit_signal;
p2->p_addr->u_pcb.pcb_hw.apcb_usp = (unsigned long)args->stack;
#ifdef DEBUG
uprintf ("linux_clone(%ld): successful rfork to %ld, stack %p, sig = %d\n",
(long)p->p_pid, (long)p2->p_pid, args->stack, exit_signal);
#endif
return (0);
}
#define STACK_SIZE (2 * 1024 * 1024)