Fix 'prctl' system call for IRIX. At this point IRIX 5.3 static binaries
are now working for 80% of the ones I have tried. The other ones that do
not work all fail in the same way with the same messages. Once that bug
is tracked down, we should be in good shape. Task locking still needs
some work.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/sysirix.c b/arch/mips/kernel/sysirix.c
index 7ae4af4..ed7c0e3 100644
--- a/arch/mips/kernel/sysirix.c
+++ b/arch/mips/kernel/sysirix.c
@@ -73,32 +73,30 @@
}
/* The prctl commands. */
-#define PR_MAXPROCS 1 /* Tasks/user. */
-#define PR_ISBLOCKED 2 /* If blocked, return 1. */
-#define PR_SETSTACKSIZE 3 /* Set largest task stack size. */
-#define PR_GETSTACKSIZE 4 /* Get largest task stack size. */
-#define PR_MAXPPROCS 5 /* Num parallel tasks. */
-#define PR_UNBLKONEXEC 6 /* When task exec/exit's, unblock. */
-#define PR_SETEXITSIG 8 /* When task exit's, set signal. */
-#define PR_RESIDENT 9 /* Make task unswappable. */
-#define PR_ATTACHADDR 10 /* (Re-)Connect a vma to a task. */
-#define PR_DETACHADDR 11 /* Disconnect a vma from a task. */
-#define PR_TERMCHILD 12 /* When parent sleeps with fishes, kill child. */
-#define PR_GETSHMASK 13 /* Get the sproc() share mask. */
-#define PR_GETNSHARE 14 /* Number of share group members. */
-#define PR_COREPID 15 /* Add task pid to name when it core. */
-#define PR_ATTACHADDRPERM 16 /* (Re-)Connect vma, with specified prot. */
-#define PR_PTHREADEXIT 17 /* Kill a pthread without prejudice. */
+#define PR_MAXPROCS 1 /* Tasks/user. */
+#define PR_ISBLOCKED 2 /* If blocked, return 1. */
+#define PR_SETSTACKSIZE 3 /* Set largest task stack size. */
+#define PR_GETSTACKSIZE 4 /* Get largest task stack size. */
+#define PR_MAXPPROCS 5 /* Num parallel tasks. */
+#define PR_UNBLKONEXEC 6 /* When task exec/exit's, unblock. */
+#define PR_SETEXITSIG 8 /* When task exit's, set signal. */
+#define PR_RESIDENT 9 /* Make task unswappable. */
+#define PR_ATTACHADDR 10 /* (Re-)Connect a vma to a task. */
+#define PR_DETACHADDR 11 /* Disconnect a vma from a task. */
+#define PR_TERMCHILD 12 /* Kill child if the parent dies. */
+#define PR_GETSHMASK 13 /* Get the sproc() share mask. */
+#define PR_GETNSHARE 14 /* Number of share group members. */
+#define PR_COREPID 15 /* Add task pid to name when it core. */
+#define PR_ATTACHADDRPERM 16 /* (Re-)Connect vma, with specified prot. */
+#define PR_PTHREADEXIT 17 /* Kill a pthread, only for IRIX 6.[234] */
-asmlinkage int irix_prctl(struct pt_regs *regs)
+asmlinkage int irix_prctl(unsigned option, ...)
{
- unsigned long cmd;
- int error = 0, base = 0;
+ va_list args;
+ int error = 0;
- if (regs->regs[2] == 1000)
- base = 1;
- cmd = regs->regs[base + 4];
- switch (cmd) {
+ va_start(args, option);
+ switch (option) {
case PR_MAXPROCS:
printk("irix_prctl[%s:%d]: Wants PR_MAXPROCS\n",
current->comm, current->pid);
@@ -111,7 +109,7 @@
printk("irix_prctl[%s:%d]: Wants PR_ISBLOCKED\n",
current->comm, current->pid);
read_lock(&tasklist_lock);
- task = find_task_by_pid(regs->regs[base + 5]);
+ task = find_task_by_pid(va_arg(args, pid_t));
error = -ESRCH;
if (error)
error = (task->run_list.next != NULL);
@@ -121,7 +119,7 @@
}
case PR_SETSTACKSIZE: {
- long value = regs->regs[base + 5];
+ long value = va_arg(args, long);
printk("irix_prctl[%s:%d]: Wants PR_SETSTACKSIZE<%08lx>\n",
current->comm, current->pid, (unsigned long) value);
@@ -222,17 +220,13 @@
error = -EINVAL;
break;
- case PR_PTHREADEXIT:
- printk("irix_prctl[%s:%d]: Wants PR_PTHREADEXIT\n",
- current->comm, current->pid);
- do_exit(regs->regs[base + 5]);
-
default:
printk("irix_prctl[%s:%d]: Non-existant opcode %d\n",
- current->comm, current->pid, (int)cmd);
+ current->comm, current->pid, option);
error = -EINVAL;
break;
}
+ va_end(args);
return error;
}
