From: Ulrich Drepper <drepper@redhat.com>
Date: Sat, 21 Jun 1997 01:41:58 +0000 (+0000)
Subject: Init code for Hurd/MIPS.
X-Git-Tag: upstream/2.30~10627^2~3564
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=304f5963db3b40ad1ac20d15bdc0329d0a163710;p=external%2Fglibc.git

Init code for Hurd/MIPS.
---

diff --git a/sysdeps/mach/hurd/mips/init-fault.c b/sysdeps/mach/hurd/mips/init-fault.c
new file mode 100644
index 0000000..619ef99
--- /dev/null
+++ b/sysdeps/mach/hurd/mips/init-fault.c
@@ -0,0 +1,41 @@
+/* Set up a thread_state for proc_handle_exceptions.  MIPS version.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <hurd/signal.h>
+#include <mach/thread_status.h>
+#include <string.h>
+#include <setjmp.h>
+
+extern jmp_buf _hurd_sigthread_fault_env;
+
+static char fault_stack[32];
+static volatile void
+faulted (void)
+{
+  __longjmp (_hurd_sigthread_fault_env, 1);
+}
+
+void
+_hurd_initialize_fault_recovery_state (void *state)
+{
+  struct mips_thread_state *ts = state;
+  memset (ts, 0, sizeof (*ts));
+  ts->r29 = (int) &fault_stack[sizeof (fault_stack)];
+  ts->pc = (int) &faulted;
+}
diff --git a/sysdeps/mach/hurd/mips/init-first.c b/sysdeps/mach/hurd/mips/init-first.c
new file mode 100644
index 0000000..b057aeb
--- /dev/null
+++ b/sysdeps/mach/hurd/mips/init-first.c
@@ -0,0 +1,407 @@
+/* Initialization code run first thing by the ELF startup code.  For Mips/Hurd.
+   Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <hurd.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include "hurdstartup.h"
+#include "set-hooks.h"
+#include "hurdmalloc.h"		/* XXX */
+
+extern void __mach_init (void);
+extern void __libc_init (int, char **, char **);
+extern void __getopt_clean_environment (void);
+extern void __libc_global_ctors (void);
+
+unsigned int __hurd_threadvar_max;
+unsigned long int __hurd_threadvar_stack_offset;
+unsigned long int __hurd_threadvar_stack_mask;
+
+int __libc_multiple_libcs = 1;
+
+int __libc_argc;
+char **__libc_argv;
+
+/* We often need the PID.  Cache this value.  */
+pid_t __libc_pid;
+
+void *(*_cthread_init_routine) (void); /* Returns new SP to use.  */
+void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__));
+
+
+/* Things that want to be run before _hurd_init or much anything else.
+   Importantly, these are called before anything tries to use malloc.  */
+DEFINE_HOOK (_hurd_preinit_hook, (void));
+
+static void
+init1 (int argc, char *arg0, ...)
+{
+  char **argv = &arg0;
+  char **envp = &argv[argc + 1];
+  struct hurd_startup_data *d;
+
+  __libc_argc = argc;
+  __libc_argv = argv;
+  __environ = envp;
+  while (*envp)
+    ++envp;
+  d = (void *) ++envp;
+
+  /* If we are the bootstrap task started by the kernel,
+     then after the environment pointers there is no Hurd
+     data block; the argument strings start there.  */
+  if ((void *) d != argv[0])
+    {
+      _hurd_init_dtable = d->dtable;
+      _hurd_init_dtablesize = d->dtablesize;
+
+      {
+	/* Check if the stack we are now on is different from
+	   the one described by _hurd_stack_{base,size}.  */
+
+	char dummy;
+	const vm_address_t newsp = (vm_address_t) &dummy;
+
+	if (d->stack_size != 0 && (newsp < d->stack_base ||
+				   newsp - d->stack_base > d->stack_size))
+	  /* The new stack pointer does not intersect with the
+	     stack the exec server set up for us, so free that stack.  */
+	  __vm_deallocate (__mach_task_self (), d->stack_base, d->stack_size);
+      }
+    }
+
+  if (__hurd_threadvar_stack_mask == 0)
+    {
+      /* We are not using cthreads, so we will have just a single allocated
+	 area for the per-thread variables of the main user thread.  */
+      unsigned long int i;
+      __hurd_threadvar_stack_offset
+	= (unsigned long int) malloc (__hurd_threadvar_max *
+				      sizeof (unsigned long int));
+      if (__hurd_threadvar_stack_offset == 0)
+	__libc_fatal ("Can't allocate single-threaded per-thread variables.");
+      for (i = 0; i < __hurd_threadvar_max; ++i)
+	((unsigned long int *) __hurd_threadvar_stack_offset)[i] = 0;
+    }
+
+  if ((void *) d != argv[0] && (d->portarray || d->intarray))
+    /* Initialize library data structures, start signal processing, etc.  */
+    _hurd_init (d->flags, argv,
+		d->portarray, d->portarraysize,
+		d->intarray, d->intarraysize);
+
+  __libc_init (argc, argv, __environ);
+
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment ();
+
+#ifdef PIC
+  __libc_global_ctors ();
+#endif
+
+  (void) &init1;
+}
+
+static void *
+__init (int *data)
+{
+  int argc = *data;
+  char **argv = (void *) (data + 1);
+  char **envp = &argv[argc + 1];
+  struct hurd_startup_data *d;
+
+  __environ = envp;
+  while (*envp)
+    ++envp;
+  d = (void *) ++envp;
+
+  /* The user might have defined a value for this, to get more variables.
+     Otherwise it will be zero on startup.  We must make sure it is set
+     properly before before cthreads initialization, so cthreads can know
+     how much space to leave for thread variables.  */
+  if (__hurd_threadvar_max < _HURD_THREADVAR_MAX)
+    __hurd_threadvar_max = _HURD_THREADVAR_MAX;
+
+
+  /* After possibly switching stacks, call `init1' (above) with the user
+     code as the return address, and the argument data immediately above
+     that on the stack.  */
+
+  if (_cthread_init_routine)
+    {
+      /* Initialize cthreads, which will allocate us a new stack to run on.  */
+      void *newsp = (*_cthread_init_routine) ();
+      struct hurd_startup_data *od;
+
+      /* Copy the argdata from the old stack to the new one.  */
+      newsp = memcpy (newsp - ((char *) &d[1] - (char *) data), data,
+		      (char *) d - (char *) data);
+
+      /* Set up the Hurd startup data block immediately following
+	 the argument and environment pointers on the new stack.  */
+      od = (newsp + ((char *) d - (char *) data));
+      if ((void *) argv[0] == d)
+	/* We were started up by the kernel with arguments on the stack.
+	   There is no Hurd startup data, so zero the block.  */
+	memset (od, 0, sizeof *od);
+      else
+	/* Copy the Hurd startup data block to the new stack.  */
+	*od = *d;
+
+      /* Push the user code address on the top of the new stack.  It will
+	 be the return address for `init1'; we will jump there with NEWSP
+	 as the stack pointer.  */
+      return newsp;
+    } 
+
+  /* The argument data is just above the stack frame we will unwind by
+     returning.  */
+  return (void *) data;
+
+  (void) &__init;
+}  
+
+#ifdef PIC
+/* This function is called to initialize the shared C library.
+   It is called just before the user _start code from mips/elf/start.S,
+   with the stack set up as that code gets it.  */
+
+/* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
+   pointer in the dynamic section based solely on that.  It is convention
+   for this function to be in the `.init' section, but the symbol name is
+   the only thing that really matters!!  */
+/*void _init (int argc, ...) __attribute__ ((unused, section (".init")));*/
+
+#if __mips64
+asm ("\
+	.section .init,\"ax\",@progbits\n\
+	.align 3\n\
+	.globl _init\n\
+	.type _init,@function\n\
+	.ent _init\n\
+_init:\n\
+	.set noreorder\n\
+	.cpload $25\n\
+	.set reorder\n\
+	dsubu $29, 8*8\n\
+	.cprestore 6*8\n\
+	sd $16, 4*8($29)\n\
+	sd $31, 5*8($29)\n\
+	jal preinit\n\
+	sd $28, 6*8($29)\n\
+	move $16, $29 # Save the old stack pointer to s0 ($16)\n\
+	daddu $4, $29, 4*8
+	jal __init\n\
+	# Restore saved registers from the old stack.\n\
+	ld $28, 6*8($16)\n\
+	ld $31, 5*8($16)\n\
+	ld $16, 4*8($16)\n\
+	move $29, $2 # set new sp to SP\n\
+call_init1:\n\
+	ld $4, 0($29)\n\
+	ld $5, 1*8($29)\n\
+	ld $6, 2*8($29)\n\
+	ld $7, 3*8($29)\n\
+	dla $25, init1\n\
+	jr $25\n\
+	.end _init\n\
+	.text\n\
+");
+#else
+asm ("\
+	.section .init,\"ax\",@progbits\n\
+	.align 2\n\
+	.globl _init\n\
+	.type _init,@function\n\
+	.ent _init\n\
+_init:\n\
+	.set noreorder\n\
+	.cpload $25\n\
+	.set reorder\n\
+	subu $29, 32\n\
+	.cprestore 24\n\
+	sw $16, 16($29)\n\
+	sw $31, 20($29)\n\
+	jal preinit\n\
+	sw $28, 24($29)\n\
+	move $16, $29 # Save the old stack pointer to s0 ($16)\n\
+	addu $4, $29, 32
+	jal __init\n\
+	# Restore saved registers from the old stack.\n\
+	lw $28, 24($16)\n\
+	lw $31, 20($16)\n\
+	lw $16, 16($16)\n\
+	move $29, $2 # set new sp to SP\n\
+call_init1:\n\
+	lw $4, 0($29)\n\
+	lw $5, 4($29)\n\
+	lw $6, 8($29)\n\
+	lw $7, 12($29)\n\
+	la $25, init1\n\
+	jr $25\n\
+	.end _init\n\
+	.text\n\
+");
+#endif
+
+static void
+preinit (void)
+{
+  /* Initialize data structures so we can do RPCs.  */
+  __mach_init ();
+
+  RUN_HOOK (_hurd_preinit_hook, ());
+
+  (void) &preinit;
+}
+
+void __libc_init_first (int argc, ...)
+{
+}
+#endif
+
+#ifndef PIC
+/* An assembler code wrapping c function __init.  */
+#ifdef __mips64
+asm ("\
+	.text\n\
+	.align 3\n\
+init:\n\
+	dsubu $29, 8*8\n\
+	sd $16, 4*8($29)\n\
+	sd $31, 5*8($29)\n\
+	move $16, $29\n\
+	jal __init\n\
+	ld $31, 5*8($16)\n\
+	ld $16, 4*8($16)\n\
+	move $29, $2 # set new sp to SP\n\
+call_init1:\n\
+	ld $4, 0($29)\n\
+	ld $5, 1*8($29)\n\
+	ld $6, 2*8($29)\n\
+	ld $7, 3*8($29)\n\
+	dla $25, init1\n\
+	jr $25\n\
+");
+#else
+asm ("\
+	.text\n\
+	.align 2\n\
+init:\n\
+	subu $29, 32\n\
+	sw $16, 16($29)\n\
+	sw $31, 20($29)\n\
+	move $16, $29\n\
+	jal __init\n\
+	lw $31, 20($16)\n\
+	lw $16, 16($16)\n\
+	move $29, $2 # set new sp to SP\n\
+call_init1:\n\
+	lw $4, 0($29)\n\
+	lw $5, 4($29)\n\
+	lw $6, 8($29)\n\
+	lw $7, 12($29)\n\
+	la $25, init1\n\
+	jr $25\n\
+");
+#endif
+
+/* An assembler code wrapping c function ___libc_init_first.
+   ___libc_init_first does an RPC call to flush cache to put doinit
+   function on the stack, so we should call __mach_init first in
+   this wrap. */
+#ifdef __mips64
+asm ("\
+	.text\n\
+	.align 3\n\
+	.globl __libc_init_first\n\
+__libc_init_first:\n\
+	dsubu $29, 8\n\
+	sd $31, 0($29)
+	jal __mach_init\n\
+	ld $4, 0($29)
+	ld $5, 1*8($29)
+	ld $6, 2*8($29)
+	ld $7, 3*8($29)
+	j ___libc_init_first\n\
+");
+#else
+asm ("\
+	.text\n\
+	.align 2\n\
+	.globl __libc_init_first\n\
+__libc_init_first:\n\
+	subu $29, 4\n\
+	sw $31, 0($29)
+	jal __mach_init\n\
+	lw $4, 0($29)
+	lw $5, 4($29)
+	lw $6, 8($29)
+	lw $7, 12($29)
+	j ___libc_init_first\n\
+");
+#endif
+
+static void
+___libc_init_first (int return_addr, int argc, ...)
+{
+  void doinit (int *data)
+    {
+#if 0
+      /* This function gets called with the argument data at TOS.  */
+      void doinit1 (int argc, ...)
+	{
+	  init (&argc);
+	}
+#endif
+      extern void init (int *data);
+
+      /* Push the user return address after the argument data, and then
+	 jump to `doinit1' (above), so it is as if __libc_init_first's
+	 caller had called `init' with the argument data already on the
+	 stack.  */
+      *--data = return_addr;
+
+#ifdef __mips64
+      asm volatile ("ld $31, 0(%0)\n" /* Load the original return address.  */
+		    "daddu $29, %0, 8\n" /* Switch to new outermost stack.  */
+		    "move $4, $29\n"
+		    "jr %1" : : "r" (data), "r" (&init));
+#else
+      asm volatile ("lw $31, 0(%0)\n" /* Load the original return address.  */
+		    "addu $29, %0, 4\n" /* Switch to new outermost stack.  */
+		    "move $4, $29\n"
+		    "jr %1" : : "r" (data), "r" (&init));
+#endif
+      /* NOTREACHED */
+    }
+
+#if 0
+  /* Initialize data structures so we can do RPCs.  */
+  __mach_init ();
+#endif
+
+  RUN_HOOK (_hurd_preinit_hook, ());
+  
+  _hurd_startup ((void **) &argc, &doinit);
+
+  (void) &___libc_init_first;
+}
+#endif