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authorRoland McGrath <roland@gnu.org>2001-11-10 00:37:59 +0000
committerRoland McGrath <roland@gnu.org>2001-11-10 00:37:59 +0000
commit7d0c5823985d8d2be48cbc23b5099633bedceef4 (patch)
tree74f4b2b676d08cccbfa7bc926f5a061fbb6dac7a /sysdeps
parentd0bf7991d6e87ffd4f378b2f7af4b3f16dfa96ee (diff)
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Hurd/PowerPC port contributed by Peter Bruin <pjbruin@dds.nl>.
* NEWS: Mention it. * sysdeps/mach/hurd/powerpc/exc2signal.c: New file. * sysdeps/mach/hurd/powerpc/init-first.c: New file. * sysdeps/mach/hurd/powerpc/intr-msg.h: New file. * sysdeps/mach/hurd/powerpc/longjmp-ts.c: New file. * sysdeps/mach/hurd/powerpc/register-dump.h: New file. * sysdeps/mach/hurd/powerpc/sigreturn.c: New file. * sysdeps/mach/hurd/powerpc/static-start.S: New file. * sysdeps/mach/hurd/powerpc/trampoline.c: New file. * sysdeps/mach/hurd/powerpc/bits/sigcontext.h: New file. * sysdeps/mach/hurd/powerpc/Dist: New file.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/mach/hurd/powerpc/Dist1
-rw-r--r--sysdeps/mach/hurd/powerpc/bits/sigcontext.h76
-rw-r--r--sysdeps/mach/hurd/powerpc/exc2signal.c74
-rw-r--r--sysdeps/mach/hurd/powerpc/init-first.c333
-rw-r--r--sysdeps/mach/hurd/powerpc/intr-msg.h99
-rw-r--r--sysdeps/mach/hurd/powerpc/longjmp-ts.c56
-rw-r--r--sysdeps/mach/hurd/powerpc/register-dump.h120
-rw-r--r--sysdeps/mach/hurd/powerpc/sigreturn.c186
-rw-r--r--sysdeps/mach/hurd/powerpc/static-start.S59
-rw-r--r--sysdeps/mach/hurd/powerpc/trampoline.c256
10 files changed, 1260 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/powerpc/Dist b/sysdeps/mach/hurd/powerpc/Dist
new file mode 100644
index 0000000..c581802
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/Dist
@@ -0,0 +1 @@
+static-start.S
diff --git a/sysdeps/mach/hurd/powerpc/bits/sigcontext.h b/sysdeps/mach/hurd/powerpc/bits/sigcontext.h
new file mode 100644
index 0000000..6f14ec5
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/bits/sigcontext.h
@@ -0,0 +1,76 @@
+/* Machine-dependent signal context structure for GNU Hurd. PowerPC version.
+ Copyright (C) 1991, 1992, 1994, 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. */
+
+#ifndef _SIGNAL_H
+# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
+#endif
+
+/* Signal handlers are actually called:
+ void handler (int sig, int code, struct sigcontext *scp); */
+
+/* State of this thread when the signal was taken. */
+struct sigcontext
+ {
+ /* These first members are machine-independent. */
+
+ int sc_onstack; /* Nonzero if running on sigstack. */
+ __sigset_t sc_mask; /* Blocked signals to restore. */
+
+ /* MiG reply port this thread is using. */
+ unsigned int sc_reply_port;
+
+ /* Port this thread is doing an interruptible RPC on. */
+ unsigned int sc_intr_port;
+
+ /* Error code associated with this signal (interpreted as `error_t'). */
+ int sc_error;
+
+ /* All following members are machine-dependent. The rest of this
+ structure is written to be laid out identically to:
+ {
+ struct ppc_thread_state basic;
+ struct ppc_exc_state exc;
+ struct ppc_float_state fpu;
+ }
+ trampoline.c knows this, so it must be changed if this changes. */
+
+#define sc_ppc_thread_state sc_srr0 /* Beginning of correspondence. */
+#define sc_pc sc_srr0 /* For sysdeps/generic/profil-counter.h. */
+ unsigned int sc_srr0;
+ unsigned int sc_srr1;
+ unsigned int sc_gprs[32];
+ unsigned int sc_cr;
+ unsigned int sc_xer;
+ unsigned int sc_lr;
+ unsigned int sc_ctr;
+ unsigned int sc_mq;
+ unsigned int sc_ts_pad;
+
+#define sc_ppc_exc_state sc_dar
+ unsigned int sc_dar;
+ unsigned int sc_dsisr;
+ unsigned int sc_exception;
+ unsigned int sc_es_pad0;
+ unsigned int sc_es_pad1[4];
+
+#define sc_ppc_float_state sc_fprs[0]
+ double sc_fprs[32];
+ unsigned int sc_fpscr_pad;
+ unsigned int sc_fpscr;
+ };
diff --git a/sysdeps/mach/hurd/powerpc/exc2signal.c b/sysdeps/mach/hurd/powerpc/exc2signal.c
new file mode 100644
index 0000000..7cea85d
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/exc2signal.c
@@ -0,0 +1,74 @@
+/* Translate Mach exception codes into signal numbers. PowerPC version.
+ Copyright (C) 1991,92,94,96,97,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <hurd.h>
+#include <hurd/signal.h>
+#include <mach/exception.h>
+
+/* Translate the Mach exception codes, as received in an `exception_raise' RPC,
+ into a signal number and signal subcode. */
+
+void
+_hurd_exception2signal (struct hurd_signal_detail *detail, int *signo)
+{
+ detail->error = 0;
+
+ switch (detail->exc)
+ {
+ default:
+ *signo = SIGIOT;
+ detail->code = detail->exc;
+ break;
+
+ case EXC_BAD_ACCESS:
+ if (detail->exc_code == KERN_PROTECTION_FAILURE)
+ *signo = SIGSEGV;
+ else
+ *signo = SIGBUS;
+ detail->code = detail->exc_subcode;
+ detail->error = detail->exc_code;
+ break;
+
+ /* XXX there has got to be something more here */
+
+ case EXC_BAD_INSTRUCTION:
+ *signo = SIGILL;
+ detail->code = 0;
+ break;
+
+ case EXC_ARITHMETIC:
+ *signo = SIGFPE;
+ detail->code = 0;
+ break;
+
+ case EXC_EMULATION:
+ *signo = SIGEMT;
+ detail->code = 0;
+ break;
+
+ case EXC_SOFTWARE:
+ *signo = SIGEMT;
+ detail->code = 0;
+ break;
+
+ case EXC_BREAKPOINT:
+ *signo = SIGTRAP;
+ detail->code = 0;
+ }
+}
diff --git a/sysdeps/mach/hurd/powerpc/init-first.c b/sysdeps/mach/hurd/powerpc/init-first.c
new file mode 100644
index 0000000..25f5c53
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/init-first.c
@@ -0,0 +1,333 @@
+/* Initialization code run first thing by the ELF startup code. PowerPC/Hurd.
+ Copyright (C) 1995,96,97,98,99,2000,01 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <assert.h>
+#include <hurd.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sysdep.h>
+#include <set-hooks.h>
+#include "hurdstartup.h"
+#include "hurdmalloc.h" /* XXX */
+
+extern void __mach_init (void);
+extern void __libc_init (int, char **, char **);
+#ifdef USE_NONOPTION_FLAGS
+extern void __getopt_clean_environment (char **);
+#endif
+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;
+
+#ifndef SHARED
+int __libc_enable_secure;
+#endif
+int __libc_multiple_libcs = 1;
+
+extern int __libc_argc;
+extern char **__libc_argv;
+extern char **_dl_argv;
+
+void *(*_cthread_init_routine) (void); /* Returns new SP to use. */
+void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__));
+
+#ifndef SHARED
+static unsigned int return_address; /* Make init1 return to _start. */
+#endif
+
+/* 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));
+
+
+/* We call this once the Hurd magic is all set up and we are ready to be a
+ Posixoid program. This does the same things the generic version does. */
+static void internal_function
+posixland_init (int argc, char **argv, char **envp)
+{
+ asm ("li 3,0xbb; .long 0");
+ __libc_argc = argc;
+ __libc_argv = argv;
+ __environ = envp;
+
+ __libc_init (argc, argv, envp);
+
+#ifdef USE_NONOPTION_FLAGS
+ /* This is a hack to make the special getopt in GNU libc working. */
+ __getopt_clean_environment (__environ);
+#endif
+
+#ifdef SHARED
+ __libc_global_ctors ();
+#endif
+}
+
+
+static void
+init1 (int *data)
+{
+ int argc = *data;
+ char **argv = (char **) &data[1];
+ char **envp = &argv[argc + 1];
+ struct hurd_startup_data *d;
+
+ 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. */
+ /* OSF Mach starts the bootstrap task with argc == 0.
+ XXX This fails if a non-bootstrap task gets started
+ with argc == 0. */
+ if (argc && (void *) d != argv[0])
+ {
+ _hurd_init_dtable = d->dtable;
+ _hurd_init_dtablesize = d->dtablesize;
+
+#if 0 /* We can't free the old stack because it contains the argument strings. */
+ {
+ /* 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);
+ }
+#endif
+ }
+
+ if (argc && (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);
+
+#ifndef SHARED
+ __libc_enable_secure = d->flags & EXEC_SECURE;
+#endif
+}
+
+
+static inline void
+init (int *data)
+{
+ int argc = *data;
+ char **argv = (void *) (data + 1);
+ char **envp = &argv[argc + 1];
+ struct hurd_startup_data *d;
+ unsigned long int threadvars[_HURD_THREADVAR_MAX];
+
+ /* Provide temporary storage for thread-specific variables on the startup
+ stack so the cthreads initialization code can use them for malloc et al,
+ or so we can use malloc below for the real threadvars array. */
+ memset (threadvars, 0, sizeof threadvars);
+ __hurd_threadvar_stack_offset = (unsigned long int) threadvars;
+
+ 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;
+#ifdef SHARED
+ void *oldsp;
+ unsigned int i, data_offset;
+#endif
+
+ /* Copy per-thread variables from that temporary
+ area onto the new cthread stack. */
+ memcpy (__hurd_threadvar_location_from_sp (0, newsp),
+ threadvars, sizeof threadvars);
+
+ /* Copy the argdata from the old stack to the new one. */
+ newsp = memcpy (newsp - ((char *) &d[1] - (char *) data), data,
+ (char *) d - (char *) data);
+
+#ifdef SHARED
+ /* And readjust the dynamic linker's idea of where the argument
+ vector lives. */
+ assert (_dl_argv == argv);
+ _dl_argv = (void *) ((int *) newsp + 1);
+#endif
+
+ /* 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 (!argc || (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;
+
+#ifndef SHARED
+ asm ("mtlr %0; mr 1,%1; li 0,0; mr 3,%1; stwu 0,-16(1); b init1"
+ : : "r" (return_address), "r" (newsp));
+ (void) init1; /* To avoid `defined but not used' warning. */
+ /* NOTREACHED */
+#else
+ /* Copy the rest of the stack. Don't call a function to do that,
+ because that will alter the current stack. */
+ asm ("mr %0,1" : "=r" (oldsp));
+ data_offset = (unsigned int) data - (unsigned int) oldsp;
+ newsp -= data_offset;
+ for (i = 0; i < data_offset / 4; i++)
+ ((unsigned int *)newsp)[i] = ((unsigned int *)oldsp)[i];
+
+ /* Relocate stack frames. */
+ {
+ unsigned int *oldframe0 = (unsigned int *)oldsp;
+ unsigned int *oldframe1 = *(unsigned int **)oldframe0;
+ unsigned int *oldframe2 = *(unsigned int **)oldframe1;
+ unsigned int *newframe0 = (unsigned int *)newsp;
+ unsigned int *newframe1 = newframe0 + (unsigned int)(oldframe1 - oldframe0);
+ unsigned int *newframe2 = newframe1 + (unsigned int)(oldframe2 - oldframe1);
+ *(unsigned int **)newframe0 = newframe1;
+ *(unsigned int **)newframe1 = newframe2;
+ }
+
+ asm ("mr 1,%0; mr 31,%0" : : "r" (newsp)); /* XXX */
+ init1 (newsp + data_offset);
+#endif
+ }
+ else
+ {
+ /* 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 *array;
+ unsigned int i;
+
+ array = malloc (__hurd_threadvar_max * sizeof (unsigned long int));
+ if (array == NULL)
+ __libc_fatal ("Can't allocate single-threaded thread variables.");
+
+ /* Copy per-thread variables from the temporary array into the
+ newly malloc'd space. */
+ memcpy (array, threadvars, sizeof threadvars);
+ __hurd_threadvar_stack_offset = (unsigned long int) array;
+ for (i = _HURD_THREADVAR_MAX; i < __hurd_threadvar_max; ++i)
+ array[i] = 0;
+
+#ifndef SHARED
+ asm ("mr 3,%0; mtlr %1; addi 1,3,-16; b init1"
+ : : "r" (data), "r" (return_address));
+ /* NOTREACHED */
+#else
+ init1 (data);
+#endif
+ }
+}
+
+
+/* Do the first essential initializations that must precede all else. */
+static inline void
+first_init (void)
+{
+ /* Initialize data structures so we can do RPCs. */
+ __mach_init ();
+
+ RUN_HOOK (_hurd_preinit_hook, ());
+}
+
+#ifdef SHARED
+/* This function is called specially by the dynamic linker to do early
+ initialization of the shared C library before normal initializers
+ expecting a Posixoid environment can run. It gets called with the
+ stack set up just as the user will see it, so it can switch stacks. */
+
+void
+_dl_init_first (int argc, ...)
+{
+ asm ("li 3,0xaa; .long 0");
+ first_init ();
+
+ init (&argc);
+}
+#endif
+
+
+#ifdef SHARED
+/* The regular posixland initialization is what goes into libc's
+ normal initializer. */
+/* 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!! */
+strong_alias (posixland_init, _init);
+
+
+void
+__libc_init_first (int argc, char **argv, char **envp)
+{
+ /* Everything was done in the shared library initializer, _init. */
+}
+#else
+strong_alias (posixland_init, __libc_init_first);
+
+
+void
+_hurd_stack_setup (int *data)
+{
+ register unsigned int address;
+ asm ("mflr %0" : "=r" (address));
+ return_address = address;
+
+ first_init ();
+
+ _hurd_startup ((void **) data, &init);
+}
+#endif
+
+
+/* This function is defined here so that if this file ever gets into
+ ld.so we will get a link error. Having this file silently included
+ in ld.so causes disaster, because the _init definition above will
+ cause ld.so to gain an init function, which is not a cool thing. */
+
+void
+_dl_start (void)
+{
+ abort ();
+}
diff --git a/sysdeps/mach/hurd/powerpc/intr-msg.h b/sysdeps/mach/hurd/powerpc/intr-msg.h
new file mode 100644
index 0000000..244d7e6
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/intr-msg.h
@@ -0,0 +1,99 @@
+/* Machine-dependent details of interruptible RPC messaging. PowerPC version.
+ Copyright (C) 1995,96,97,99,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \
+({ \
+ error_t err; \
+ asm (".globl _hurd_intr_rpc_msg_do_trap\n" \
+ ".globl _hurd_intr_rpc_msg_in_trap\n" \
+ " mr 3, %1\n" \
+ " mr 4, %2\n" \
+ " mr 5, %3\n" \
+ " mr 6, %4\n" \
+ " mr 7, %5\n" \
+ " mr 8, %6\n" \
+ " mr 9, %7\n" \
+ " li 0, -25\n" \
+ "_hurd_intr_rpc_msg_do_trap: sc\n" \
+ "_hurd_intr_rpc_msg_in_trap: mr 3, %0\n" \
+ : "=r" (err) \
+ : "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \
+ "r" (rcv_name), "r" (timeout), "r" (notify) \
+ : "0", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"); \
+ err; \
+})
+
+static void inline
+INTR_MSG_BACK_OUT (struct ppc_thread_state *state)
+{
+ return;
+}
+
+#include "hurdfault.h"
+
+/* This cannot be an inline function because it calls setjmp. */
+#define SYSCALL_EXAMINE(state, callno) \
+({ \
+ u_int32_t *p = (void *) ((state)->srr0 - 4); \
+ int result; \
+ _hurdsig_catch_memory_fault (p) ? 0 : \
+ ({ \
+ if (result = (*p == 0x44000002)) \
+ /* The PC is just after an `sc' instruction. \
+ This is a system call in progress; %r0 holds the call number. */ \
+ *(callno) = (state)->r0; \
+ _hurdsig_end_catch_fault (); \
+ result; \
+ }); \
+})
+
+struct mach_msg_trap_args
+ {
+ /* This is the order of arguments to mach_msg_trap. */
+ mach_msg_header_t *msg;
+ mach_msg_option_t option;
+ mach_msg_size_t send_size;
+ mach_msg_size_t rcv_size;
+ mach_port_t rcv_name;
+ mach_msg_timeout_t timeout;
+ mach_port_t notify;
+ };
+
+/* This cannot be an inline function because it calls setjmp. */
+#define MSG_EXAMINE(state, msgid, rcv_name, send_name, option, timeout) \
+({ \
+ mach_msg_header_t *msg = (mach_msg_header_t *) (state)->r3; \
+ *(option) = (mach_msg_option_t) (state)->r4; \
+ *(rcv_name) = (mach_port_t) (state)->r7; \
+ *(timeout) = (mach_msg_timeout_t) (state)->r8; \
+ (msg == 0) ? \
+ ({ \
+ *(send_name) = MACH_PORT_NULL; \
+ *(msgid) = 0; \
+ 0; \
+ }) : \
+ (_hurdsig_catch_memory_fault (msg) ? -1 : \
+ ({ \
+ *(send_name) = msg->msgh_remote_port; \
+ *(msgid) = msg->msgh_id; \
+ _hurdsig_end_catch_fault (); \
+ 0; \
+ }) \
+ ); \
+}) \
diff --git a/sysdeps/mach/hurd/powerpc/longjmp-ts.c b/sysdeps/mach/hurd/powerpc/longjmp-ts.c
new file mode 100644
index 0000000..4a59f16
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/longjmp-ts.c
@@ -0,0 +1,56 @@
+/* Perform a `longjmp' on a Mach thread_state. PowerPC version.
+ Copyright (C) 1991,94,95,97,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <hurd/signal.h>
+#include <setjmp.h>
+#include <mach/thread_status.h>
+
+
+/* Set up STATE to do the equivalent of `longjmp (ENV, VAL);'. */
+
+void
+_hurd_longjmp_thread_state (void *state, jmp_buf env, int val)
+{
+ struct ppc_thread_state *ts = state;
+
+ /* XXX should we set up the FPRs as well? And how? */
+ ts->r1 = env[0].__jmpbuf[JB_GPR1];
+ ts->r2 = env[0].__jmpbuf[JB_GPR2];
+ ts->r14 = env[0].__jmpbuf[JB_GPRS+0];
+ ts->r15 = env[0].__jmpbuf[JB_GPRS+1];
+ ts->r16 = env[0].__jmpbuf[JB_GPRS+2];
+ ts->r17 = env[0].__jmpbuf[JB_GPRS+3];
+ ts->r18 = env[0].__jmpbuf[JB_GPRS+4];
+ ts->r19 = env[0].__jmpbuf[JB_GPRS+5];
+ ts->r20 = env[0].__jmpbuf[JB_GPRS+6];
+ ts->r21 = env[0].__jmpbuf[JB_GPRS+7];
+ ts->r22 = env[0].__jmpbuf[JB_GPRS+8];
+ ts->r23 = env[0].__jmpbuf[JB_GPRS+9];
+ ts->r24 = env[0].__jmpbuf[JB_GPRS+10];
+ ts->r25 = env[0].__jmpbuf[JB_GPRS+11];
+ ts->r26 = env[0].__jmpbuf[JB_GPRS+12];
+ ts->r27 = env[0].__jmpbuf[JB_GPRS+13];
+ ts->r28 = env[0].__jmpbuf[JB_GPRS+14];
+ ts->r29 = env[0].__jmpbuf[JB_GPRS+15];
+ ts->r30 = env[0].__jmpbuf[JB_GPRS+16];
+ ts->r31 = env[0].__jmpbuf[JB_GPRS+17];
+ ts->cr = env[0].__jmpbuf[JB_CR];
+ ts->r3 = val ?: 1;
+ ts->srr0 = ts->lr = env[0].__jmpbuf[JB_LR];
+}
diff --git a/sysdeps/mach/hurd/powerpc/register-dump.h b/sysdeps/mach/hurd/powerpc/register-dump.h
new file mode 100644
index 0000000..0377175
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/register-dump.h
@@ -0,0 +1,120 @@
+/* Dump registers. PowerPC/Hurd version.
+ Copyright (C) 1998, 2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sys/uio.h>
+#include <stdio-common/_itoa.h>
+
+/* This prints out the information in the following form: */
+static const char dumpform[] = "\
+Register dump:\n\
+fp0-3: 0000030%0000031% 0000032%0000033% 0000034%0000035% 0000036%0000037%\n\
+fp4-7: 0000038%0000039% 000003a%000003b% 000003c%000003d% 000003e%000003f%\n\
+fp8-11: 0000040%0000041% 0000042%0000043% 0000044%0000045% 0000046%0000047%\n\
+fp12-15: 0000048%0000049% 000004a%000004b% 000004c%000004d% 000004e%000004f%\n\
+fp16-19: 0000050%0000051% 0000052%0000053% 0000054%0000055% 0000056%0000057%\n\
+fp20-23: 0000058%0000059% 000005a%000005b% 000005c%000005d% 000005e%000005f%\n\
+fp24-27: 0000060%0000061% 0000062%0000063% 0000064%0000065% 0000066%0000067%\n\
+fp28-31: 0000068%0000069% 000006a%000006b% 000006c%000006d% 000006e%000006f%\n\
+r0 =0000002% sp =0000003% r2 =0000004% r3 =0000005%\n\
+r4 =0000006% r5 =0000007% r6 =0000008% r7 =0000009% sr0=0000000% sr1=0000001%\n\
+r8 =000000a% r9 =000000b% r10=000000c% r11=000000d% cr=0000022% xer=0000023%\n\
+r12=000000e% r13=000000f% r14=0000010% r15=0000011% lr=0000024% ctr=0000025%\n\
+r16=0000012% r17=0000013% r18=0000014% r19=0000015% mq=0000026% fcr=0000071%\n\
+r20=0000016% r21=0000017% r22=0000018% r23=0000019% dar=0000028% dsi=0000029%\n\
+r24=000001a% r25=000001b% r26=000001c% r27=000001d% exc=000002a%\n\
+r28=000001e% r29=000001f% r30=0000020% r31=0000021%\n\
+";
+
+/* Most of the fields are self-explanatory. 'sr0' is the next
+ instruction to execute, from SRR0, which may have some relationship
+ with the instruction that caused the exception. 'r3*' is the value
+ that will be returned in register 3 when the current system call
+ returns. 'sr1' is SRR1, bits 16-31 of which are copied from the MSR:
+
+ 16 - External interrupt enable
+ 17 - Privilege level (1=user, 0=supervisor)
+ 18 - FP available
+ 19 - Machine check enable (if clear, processor locks up on machine check)
+ 20 - FP exception mode bit 0 (FP exceptions recoverable)
+ 21 - Single-step trace enable
+ 22 - Branch trace enable
+ 23 - FP exception mode bit 1
+ 25 - exception prefix (if set, exceptions are taken from 0xFFFnnnnn,
+ otherwise from 0x000nnnnn).
+ 26 - Instruction address translation enabled.
+ 27 - Data address translation enabled.
+ 30 - Exception is recoverable (otherwise, don't try to return).
+ 31 - Little-endian mode enable.
+
+ 'Trap' is the address of the exception:
+
+ 00200 - Machine check exception (memory parity error, for instance)
+ 00300 - Data access exception (memory not mapped, see dsisr for why)
+ 00400 - Instruction access exception (memory not mapped)
+ 00500 - External interrupt
+ 00600 - Alignment exception (see dsisr for more information)
+ 00700 - Program exception (illegal/trap instruction, FP exception)
+ 00800 - FP unavailable (should not be seen by user code)
+ 00900 - Decrementer exception (for instance, SIGALRM)
+ 00A00 - I/O controller interface exception
+ 00C00 - System call exception (for instance, kill(3)).
+ 00E00 - FP assist exception (optional FP instructions, etc.)
+
+ 'dar' is the memory location, for traps 00300, 00400, 00600, 00A00.
+ 'dsisr' has the following bits under trap 00300:
+ 0 - direct-store error exception
+ 1 - no page table entry for page
+ 4 - memory access not permitted
+ 5 - trying to access I/O controller space or using lwarx/stwcx on
+ non-write-cached memory
+ 6 - access was store
+ 9 - data access breakpoint hit
+ 10 - segment table search failed to find translation (64-bit ppcs only)
+ 11 - I/O controller instruction not permitted
+ For trap 00400, the same bits are set in SRR1 instead.
+ For trap 00600, bits 12-31 of the DSISR set to allow emulation of
+ the instruction without actually having to read it from memory.
+*/
+
+#define xtoi(x) (x >= 'a' ? x + 10 - 'a' : x - '0')
+
+static void
+register_dump (int fd, struct sigcontext *ctx)
+{
+ char buffer[sizeof(dumpform)];
+ char *bufferpos;
+ unsigned regno;
+ unsigned *regs = (unsigned *)(&ctx->sc_srr0);
+
+ memcpy(buffer, dumpform, sizeof(dumpform));
+
+ /* Generate the output. */
+ while ((bufferpos = memchr (buffer, '%', sizeof(dumpform))))
+ {
+ regno = xtoi (bufferpos[-1]) | xtoi (bufferpos[-2]) << 4;
+ memset (bufferpos-2, '0', 3);
+ _itoa_word (regs[regno], bufferpos+1, 16, 0);
+ }
+
+ /* Write the output. */
+ write (fd, buffer, sizeof(buffer));
+}
+
+#define REGISTER_DUMP \
+ register_dump (fd, ctx)
diff --git a/sysdeps/mach/hurd/powerpc/sigreturn.c b/sysdeps/mach/hurd/powerpc/sigreturn.c
new file mode 100644
index 0000000..18e37a3
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/sigreturn.c
@@ -0,0 +1,186 @@
+/* Return from signal handler for Hurd. PowerPC version.
+ Copyright (C) 1996,97,98,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <hurd.h>
+#include <hurd/signal.h>
+#include <hurd/threadvar.h>
+#include <stdlib.h>
+
+int
+__sigreturn (struct sigcontext *scp)
+{
+ struct hurd_sigstate *ss;
+ mach_port_t *reply_port;
+
+ if (scp == NULL || (scp->sc_mask & _SIG_CANT_MASK))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ ss = _hurd_self_sigstate ();
+ __spin_lock (&ss->lock);
+
+ /* Restore the set of blocked signals, and the intr_port slot. */
+ ss->blocked = scp->sc_mask;
+ ss->intr_port = scp->sc_intr_port;
+
+ /* Check for pending signals that were blocked by the old set. */
+ if (ss->pending & ~ss->blocked)
+ {
+ /* There are pending signals that just became unblocked. Wake up the
+ signal thread to deliver them. But first, squirrel away SCP where
+ the signal thread will notice it if it runs another handler, and
+ arrange to have us called over again in the new reality. */
+ ss->context = scp;
+ __spin_unlock (&ss->lock);
+ __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
+ /* If a pending signal was handled, sig_post never returned. */
+ __spin_lock (&ss->lock);
+ ss->context = NULL;
+ }
+
+ if (scp->sc_onstack)
+ {
+ ss->sigaltstack.ss_flags &= ~SS_ONSTACK; /* XXX threadvars */
+ /* XXX cannot unlock until off sigstack */
+ abort ();
+ }
+ else
+ __spin_unlock (&ss->lock);
+
+ /* Destroy the MiG reply port used by the signal handler, and restore the
+ reply port in use by the thread when interrupted. */
+ reply_port =
+ (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY);
+ if (*reply_port)
+ {
+ mach_port_t port = *reply_port;
+
+ /* Assigning MACH_PORT_DEAD here tells libc's mig_get_reply_port not to
+ get another reply port, but avoids mig_dealloc_reply_port trying to
+ deallocate it after the receive fails (which it will, because the
+ reply port will be bogus, whether we do this or not). */
+ *reply_port = MACH_PORT_DEAD;
+
+ __mach_port_destroy (__mach_task_self (), port);
+ }
+ *reply_port = scp->sc_reply_port;
+
+ /* Restore FPU state. */
+#define restore_fpr(n) \
+ asm volatile ("lfd " #n ",%0(31)" : : "i" (n * 4))
+
+ asm volatile ("mr 31,%0" : : "r" (scp->sc_fprs));
+
+ /* Restore the floating-point control/status register. */
+ asm volatile ("lfd 0,256(31)");
+ asm volatile ("mtfsf 0xff,0");
+
+ /* Restore floating-point registers. */
+ restore_fpr (0);
+ restore_fpr (1);
+ restore_fpr (2);
+ restore_fpr (3);
+ restore_fpr (4);
+ restore_fpr (5);
+ restore_fpr (6);
+ restore_fpr (7);
+ restore_fpr (8);
+ restore_fpr (9);
+ restore_fpr (10);
+ restore_fpr (11);
+ restore_fpr (12);
+ restore_fpr (13);
+ restore_fpr (14);
+ restore_fpr (15);
+ restore_fpr (16);
+ restore_fpr (17);
+ restore_fpr (18);
+ restore_fpr (19);
+ restore_fpr (20);
+ restore_fpr (21);
+ restore_fpr (22);
+ restore_fpr (23);
+ restore_fpr (24);
+ restore_fpr (25);
+ restore_fpr (26);
+ restore_fpr (27);
+ restore_fpr (28);
+ restore_fpr (29);
+ restore_fpr (30);
+ restore_fpr (31);
+
+ /* Load all the registers from the sigcontext. */
+#define restore_gpr(n) \
+ asm volatile ("lwz " #n ",%0(31)" : : "i" (n * 4))
+
+ asm volatile ("addi 31,31,-188"); /* r31 = scp->gprs */
+
+ /* Restore the special purpose registers. */
+ asm volatile ("lwz 0,128(31); mtcr 0");
+ asm volatile ("lwz 0,132(31); mtxer 0");
+ asm volatile ("lwz 0,136(31); mtlr 0");
+ asm volatile ("lwz 0,-8(31); mtctr 0"); /* XXX this is the PC */
+#if 0
+ asm volatile ("lwz 0,144(31); mtmq %0"); /* PPC601 only */
+#endif
+
+ /* Restore the normal registers. */
+ restore_gpr (0);
+ restore_gpr (1);
+ restore_gpr (2);
+ restore_gpr (3);
+ restore_gpr (4);
+ restore_gpr (5);
+ restore_gpr (6);
+ restore_gpr (7);
+ restore_gpr (8);
+ restore_gpr (9);
+ restore_gpr (10);
+ restore_gpr (11);
+ restore_gpr (12);
+ restore_gpr (13);
+ restore_gpr (14);
+ restore_gpr (15);
+ restore_gpr (16);
+ restore_gpr (17);
+ restore_gpr (18);
+ restore_gpr (19);
+ restore_gpr (20);
+ restore_gpr (21);
+ restore_gpr (22);
+ restore_gpr (23);
+ restore_gpr (24);
+ restore_gpr (25);
+ restore_gpr (26);
+ restore_gpr (27);
+ restore_gpr (28);
+ restore_gpr (29);
+ restore_gpr (30);
+ restore_gpr (31);
+
+ /* Return. */
+ asm volatile ("bctr"); /* XXX CTR is not restored! */
+
+ /* NOTREACHED */
+ return -1;
+}
+
+weak_alias (__sigreturn, sigreturn)
diff --git a/sysdeps/mach/hurd/powerpc/static-start.S b/sysdeps/mach/hurd/powerpc/static-start.S
new file mode 100644
index 0000000..209972c
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/static-start.S
@@ -0,0 +1,59 @@
+/* Startup code for statically linked Hurd/PowerPC binaries.
+ Copyright (C) 1998,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+ /* These are the various addresses we require. */
+ .section ".rodata"
+ .align 2
+ weak_extern(_init)
+ weak_extern(_fini)
+L(start_addresses):
+ .long _SDA_BASE_
+ .long JUMPTARGET(main)
+ .long JUMPTARGET(_init)
+ .long JUMPTARGET(_fini)
+ ASM_SIZE_DIRECTIVE(L(start_addresses))
+
+ .section ".text"
+ENTRY(_start)
+ /* Save the stack pointer to pass to _hurd_stack_setup. */
+ mr r3,r1
+ /* Set up an initial stack frame. */
+ li r0,0
+ stwu r0,-16(r1)
+ /* Call _hurd_stack_setup. */
+ bl JUMPTARGET(_hurd_stack_setup)
+ /* Pass the argument data to __libc_start_main. */
+ addi r9,r1,16
+ /* Clear the LR. */
+ li r0,0
+ mtlr r0
+ /* Set r13 to point at the 'small data area', and put the address of
+ start_addresses in r8... */
+ lis r8,L(start_addresses)@ha
+ lwzu r13,L(start_addresses)@l(r8)
+ /* and continue in libc-start, in glibc. */
+ b JUMPTARGET(__libc_start_main)
+END(_start)
+
+/* Define a symbol for the first piece of initialized data. */
+ .section ".data"
+__data_start:
+weak_alias (__data_start, data_start)
diff --git a/sysdeps/mach/hurd/powerpc/trampoline.c b/sysdeps/mach/hurd/powerpc/trampoline.c
new file mode 100644
index 0000000..4e5d675
--- /dev/null
+++ b/sysdeps/mach/hurd/powerpc/trampoline.c
@@ -0,0 +1,256 @@
+/* Set thread_state for sighandler, and sigcontext to recover. For PowerPC.
+ Copyright (C) 1994,95,96,97,98,99,2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <hurd/signal.h>
+#include <hurd/userlink.h>
+#include "thread_state.h"
+#include <assert.h>
+#include <errno.h>
+#include "hurdfault.h"
+#include "intr-msg.h"
+
+struct sigcontext *
+_hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler,
+ int signo, struct hurd_signal_detail *detail,
+ volatile int rpc_wait,
+ struct machine_thread_all_state *state)
+{
+ void trampoline (void);
+ void rpc_wait_trampoline (void);
+ void *volatile sigsp;
+ struct sigcontext *scp;
+
+ if (ss->context)
+ {
+ /* We have a previous sigcontext that sigreturn was about
+ to restore when another signal arrived. We will just base
+ our setup on that. */
+ if (! _hurdsig_catch_memory_fault (ss->context))
+ {
+ memcpy (&state->basic, &ss->context->sc_ppc_thread_state,
+ sizeof (state->basic));
+ memcpy (&state->exc, &ss->context->sc_ppc_exc_state,
+ sizeof (state->exc));
+ memcpy (&state->fpu, &ss->context->sc_ppc_float_state,
+ sizeof (state->fpu));
+ state->set = (1 << PPC_THREAD_STATE) | (1 << PPC_EXCEPTION_STATE)
+ | (1 << PPC_FLOAT_STATE);
+ }
+ }
+
+ if (! machine_get_basic_state (ss->thread, state))
+ return NULL;
+
+ if ((ss->actions[signo].sa_flags & SA_ONSTACK) &&
+ !(ss->sigaltstack.ss_flags & (SS_DISABLE|SS_ONSTACK)))
+ {
+ sigsp = ss->sigaltstack.ss_sp + ss->sigaltstack.ss_size;
+ ss->sigaltstack.ss_flags |= SS_ONSTACK;
+ /* XXX need to set up base of new stack for
+ per-thread variables, cthreads. */
+ }
+ else
+ sigsp = (char *) state->basic.SP;
+
+ /* Set up the sigcontext structure on the stack. This is all the stack
+ needs, since the args are passed in registers (below). */
+ sigsp -= sizeof (*scp);
+ scp = sigsp;
+ sigsp -= 16; /* Reserve some space for a stack frame. */
+
+ if (_hurdsig_catch_memory_fault (scp))
+ {
+ /* We got a fault trying to write the stack frame.
+ We cannot set up the signal handler.
+ Returning NULL tells our caller, who will nuke us with a SIGILL. */
+ return NULL;
+ }
+ else
+ {
+ int ok;
+
+ /* Set up the sigcontext from the current state of the thread. */
+
+ scp->sc_onstack = ss->sigaltstack.ss_flags & SS_ONSTACK ? 1 : 0;
+
+ /* struct sigcontext is laid out so that starting at sc_srr0
+ mimics a struct ppc_thread_state. */
+ memcpy (&scp->sc_ppc_thread_state,
+ &state->basic, sizeof (state->basic));
+
+ /* struct sigcontext is laid out so that starting at sc_dar
+ mimics a struct ppc_exc_state. */
+ ok = machine_get_state (ss->thread, state, PPC_EXCEPTION_STATE,
+ &state->exc, &scp->sc_ppc_exc_state,
+ sizeof (state->exc));
+
+ /* struct sigcontext is laid out so that starting at sc_fprs[0]
+ mimics a struct ppc_float_state. */
+ if (ok)
+ ok = machine_get_state (ss->thread, state, PPC_FLOAT_STATE,
+ &state->fpu, &scp->sc_ppc_float_state,
+ sizeof (state->fpu));
+
+ _hurdsig_end_catch_fault ();
+
+ if (!ok)
+ return NULL;
+ }
+
+ /* Modify the thread state to call the trampoline code on the new stack. */
+ if (rpc_wait)
+ {
+ /* The signalee thread was blocked in a mach_msg_trap system call,
+ still waiting for a reply. We will have it run the special
+ trampoline code which retries the message receive before running
+ the signal handler.
+
+ To do this we change the OPTION argument in its registers to
+ enable only message reception, since the request message has
+ already been sent. */
+
+ /* The system call arguments are stored in consecutive registers
+ starting with r3. */
+ struct mach_msg_trap_args *args = (void *) &state->basic.r3;
+
+ if (_hurdsig_catch_memory_fault (args))
+ {
+ /* Faulted accessing ARGS. Bomb. */
+ return NULL;
+ }
+
+ assert (args->option & MACH_RCV_MSG);
+ /* Disable the message-send, since it has already completed. The
+ calls we retry need only wait to receive the reply message. */
+ args->option &= ~MACH_SEND_MSG;
+
+ /* Limit the time to receive the reply message, in case the server
+ claimed that `interrupt_operation' succeeded but in fact the RPC
+ is hung. */
+ args->option |= MACH_RCV_TIMEOUT;
+ args->timeout = _hurd_interrupted_rpc_timeout;
+
+ _hurdsig_end_catch_fault ();
+
+ state->basic.PC = (int) rpc_wait_trampoline;
+ /* After doing the message receive, the trampoline code will need to
+ update the r3 value to be restored by sigreturn. To simplify
+ the assembly code, we pass the address of its slot in SCP to the
+ trampoline code in r10. */
+ state->basic.r10 = (long int) &scp->sc_gprs[3];
+ /* We must preserve the mach_msg_trap args in r3..r9.
+ Pass the handler args to the trampoline code in r11..r13. */
+ state->basic.r11 = signo;
+ state->basic.r12 = detail->code;
+ state->basic.r13 = (int) scp;
+ }
+ else
+ {
+ state->basic.PC = (int) trampoline;
+ state->basic.r3 = signo;
+ state->basic.r4 = detail->code;
+ state->basic.r5 = (int) scp;
+ }
+
+ state->basic.r1 = (int) sigsp; /* r1 is the stack pointer. */
+
+ /* We pass the handler function to the trampoline code in ctr. */
+ state->basic.ctr = (int) handler;
+ /* In r15, we store the address of __sigreturn itself,
+ for the trampoline code to use. */
+ state->basic.r15 = (int) &__sigreturn;
+ /* In r16, we save the SCP value to pass to __sigreturn
+ after the handler returns. */
+ state->basic.r16 = (int) scp;
+
+ /* In r3, we store a pointer to the registers in STATE so that the
+ trampoline code can load the registers from that. For some reason,
+ thread_set_state doesn't set all registers. */
+ state->basic.r17 = state->basic.r3; /* Store the real r3 in r17. */
+ state->basic.r3 = (int) &state->basic.r0;
+
+ return scp;
+}
+
+/* The trampoline code follows. This used to be located inside
+ _hurd_setup_sighandler, but was optimized away by gcc 2.95. */
+
+/* This function sets some registers which the trampoline code uses
+ and which are not automatically set by thread_set_state.
+ In r3 we have a pointer to the registers in STATE. */
+asm ("trampoline_load_registers:\n"
+ "lwz 17,68(3)\n" /* The real r3. */
+ "lwz 4,16(3)\n"
+ "lwz 5,20(3)\n"
+ "lwz 6,24(3)\n"
+ "lwz 7,28(3)\n"
+ "lwz 8,32(3)\n"
+ "lwz 9,36(3)\n"
+ "lwz 10,40(3)\n"
+ "lwz 11,44(3)\n"
+ "lwz 12,48(3)\n"
+ "lwz 13,52(3)\n"
+ "lwz 14,56(3)\n"
+ "lwz 15,60(3)\n"
+ "lwz 16,64(3)\n"
+ "mr 3,17\n"
+ "blr\n");
+
+asm ("rpc_wait_trampoline:\n");
+ /* This is the entry point when we have an RPC reply message to receive
+ before running the handler. The MACH_MSG_SEND bit has already been
+ cleared in the OPTION argument in our registers. For our convenience,
+ r10 points to the sc_regs[3] member of the sigcontext (saved r3). */
+
+asm (/* Retry the interrupted mach_msg system call. */
+ "bl trampoline_load_registers\n"
+ "li 0, -25\n" /* mach_msg_trap */
+ "sc\n"
+ /* When the sigcontext was saved, r3 was MACH_RCV_INTERRUPTED. But
+ now the message receive has completed and the original caller of
+ the RPC (i.e. the code running when the signal arrived) needs to
+ see the final return value of the message receive in r3. So
+ store the new r3 value into the sc_regs[3] member of the sigcontext
+ (whose address is in r10 to make this code simpler). */
+ "stw 3, 0(10)\n"
+ /* Since the argument registers needed to have the mach_msg_trap
+ arguments, we've stored the arguments to the handler function
+ in registers r11..r13 of the state structure. */
+ "mr 3,11\n"
+ "mr 4,12\n"
+ "mr 5,13\n");
+
+asm ("trampoline:\n");
+ /* Entry point for running the handler normally. The arguments to the
+ handler function are already in the standard registers:
+
+ r3 SIGNO
+ r4 SIGCODE
+ r5 SCP
+
+ r16 also contains SCP; this value is callee-saved (and so should not get
+ clobbered by running the handler). We use this saved value to pass to
+ __sigreturn, so the handler can clobber the argument registers if it
+ likes. */
+asm ("bl trampoline_load_registers\n"
+ "bctrl\n" /* Call the handler function. */
+ "mtctr 15\n" /* Copy &__sigreturn to CTR. */
+ "mr 3,16\n" /* Copy the saved SCP to r3. */
+ "bctr\n" /* Call __sigreturn (SCP). */
+ );