--- /dev/null
+/* 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
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