diff options
Diffstat (limited to 'sysdeps/mach/hurd/mips')
| -rw-r--r-- | sysdeps/mach/hurd/mips/bits/sigcontext.h (renamed from sysdeps/mach/hurd/mips/sigcontext.h) | 0 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/dl-machine.c | 131 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/exc2signal.c | 65 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/init-fault.c | 41 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/init-first.c | 407 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/intr-msg.h | 127 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/longjmp-ctx.c | 41 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/longjmp-ts.c | 34 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/sigreturn.c | 100 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/mips/trampoline.c | 217 |
10 files changed, 1010 insertions, 153 deletions
diff --git a/sysdeps/mach/hurd/mips/sigcontext.h b/sysdeps/mach/hurd/mips/bits/sigcontext.h index 81d1f25f25..81d1f25f25 100644 --- a/sysdeps/mach/hurd/mips/sigcontext.h +++ b/sysdeps/mach/hurd/mips/bits/sigcontext.h diff --git a/sysdeps/mach/hurd/mips/dl-machine.c b/sysdeps/mach/hurd/mips/dl-machine.c new file mode 100644 index 0000000000..18261e1115 --- /dev/null +++ b/sysdeps/mach/hurd/mips/dl-machine.c @@ -0,0 +1,131 @@ +/* Operating system support for run-time dynamic linker. MIPS specific + stuffs on 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 <link.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdlib.h> +#include <sys/mman.h> +#include <assert.h> +#include <sysdep.h> +#include <mach/mig_support.h> +#include "../stdio-common/_itoa.h" +#include <stdarg.h> +#include <ctype.h> +#include <sys/stat.h> + +void weak_function +abort (void) +{ + _exit (127); +} + + +#include <string.h> +#include <mach/error.h> +#include <errorlib.h> + +#undef _ +#define _(x) x + +/* Return a string describing the errno code in ERRNUM. */ +char * weak_function +_strerror_internal (int errnum, char *buf, size_t buflen) +{ + int system; + int sub; + int code; + const struct error_system *es; + extern void __mach_error_map_compat (int *); + + __mach_error_map_compat (&errnum); + + system = err_get_system (errnum); + sub = err_get_sub (errnum); + code = err_get_code (errnum); + + if (system > err_max_system || ! __mach_error_systems[system].bad_sub) + { + const char *unk = _("Error in unknown error system: "); + const size_t unklen = strlen (unk); + char *p = buf + buflen; + *--p = '\0'; + p = _itoa (errnum, p, 16, 1); + return memcpy (p - unklen, unk, unklen); + } + + es = &__mach_error_systems[system]; + + if (sub >= es->max_sub) + return (char *) es->bad_sub; + + if (code >= es->subsystem[sub].max_code) + { + const char *unk = _("Unknown error "); + const size_t unklen = strlen (unk); + char *p = buf + buflen; + size_t len = strlen (es->subsystem[sub].subsys_name); + *--p = '\0'; + p = _itoa (errnum, p, 16, 1); + *p-- = ' '; + p = memcpy (p - len, es->subsystem[sub].subsys_name, len); + return memcpy (p - unklen, unk, unklen); + } + + return (char *) _(es->subsystem[sub].codes[code]); +} + +/* Read the whole contents of FILE into new mmap'd space with given + protections. The size of the file is returned in SIZE. */ +void * +_dl_sysdep_read_whole_file (const char *file, size_t *size, int prot) +{ + struct stat stat; + mach_port_t memobj_rd; + void *contents; + error_t err; + + memobj_rd = __open (file, O_RDONLY, 0); + if (memobj_rd) + { + err = __io_stat ((file_t) memobj_rd, &stat); + if (err) + { + __hurd_fail (err); + contents = 0; + } + else + { + /* Map a copy of the file contents. */ + contents = __mmap (0, stat.st_size, prot, MAP_COPY, memobj_rd, 0); + if (contents == (void *)-1) + contents = 0; + else + *size = stat.st_size; + } + + __mach_port_deallocate (__mach_task_self (), memobj_rd); + } + else + contents = 0; + + return contents; +} diff --git a/sysdeps/mach/hurd/mips/exc2signal.c b/sysdeps/mach/hurd/mips/exc2signal.c index f907c89cf0..235b2e2947 100644 --- a/sysdeps/mach/hurd/mips/exc2signal.c +++ b/sysdeps/mach/hurd/mips/exc2signal.c @@ -1,21 +1,21 @@ /* Translate Mach exception codes into signal numbers. MIPS version. -Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc. -This file is part of the GNU C Library. + 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 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. + 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 <hurd/signal.h> @@ -25,56 +25,55 @@ Cambridge, MA 02139, USA. */ into a signal number and signal subcode. */ void -_hurd_exception2signal (int exception, int code, int subcode, - int *signo, long int *sigcode, int *error) +_hurd_exception2signal (struct hurd_signal_detail *detail, int *signo) { - *error = 0; + detail->error = 0; - switch (exception) + switch (detail->exc) { default: *signo = SIGIOT; - *sigcode = exception; + detail->code = detail->exc; break; case EXC_BAD_ACCESS: - if (code == KERN_PROTECTION_FAILURE) + if (detail->exc_code == KERN_PROTECTION_FAILURE) *signo = SIGSEGV; else *signo = SIGBUS; - *sigcode = subcode; - *error = code; + detail->code = detail->exc_subcode; + detail->error = detail->exc_code; break; case EXC_BAD_INSTRUCTION: *signo = SIGILL; - if (code == EXC_MIPS_II) - *sigcode = code; + if (detail->exc_code == EXC_MIPS_II) + detail->code = detail->exc_subcode; else - *sigcode = 0; + detail->code = 0; break; case EXC_ARITHMETIC: - switch (code) + switch (detail->exc_code) { case EXC_MIPS_OV: /* integer overflow */ *signo = SIGFPE; - *sigcode = EXC_MIPS_FLT_OVERFLOW; + detail->code = detail->exc_subcode; break; default: *signo = SIGFPE; - *sigcode = 0; + detail->code = 0; break; case EXC_MIPS_INT: /* Subcode is the fp_status word saved by the hardware. Give an error code corresponding to the first bit set. */ - if (subcode == EXC_MIPS_FLT_UNIMP) + if (detail->exc_subcode == EXC_MIPS_FLT_UNIMP) *signo = SIGILL; else *signo = SIGFPE; - *sigcode = subcode; + detail->code = detail->exc_subcode; break; } break; @@ -82,17 +81,17 @@ _hurd_exception2signal (int exception, int code, int subcode, case EXC_EMULATION: /* 3.0 doesn't give this one, why, I don't know. */ *signo = SIGEMT; - *sigcode = 0; + detail->code = 0; break; case EXC_SOFTWARE: *signo = SIGEMT; - *sigcode = 0; + detail->code = 0; break; case EXC_BREAKPOINT: *signo = SIGTRAP; - *sigcode = code; + detail->code = 0; break; } } diff --git a/sysdeps/mach/hurd/mips/init-fault.c b/sysdeps/mach/hurd/mips/init-fault.c new file mode 100644 index 0000000000..619ef996a9 --- /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 0000000000..b057aeb097 --- /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 diff --git a/sysdeps/mach/hurd/mips/intr-msg.h b/sysdeps/mach/hurd/mips/intr-msg.h new file mode 100644 index 0000000000..7d155f63f3 --- /dev/null +++ b/sysdeps/mach/hurd/mips/intr-msg.h @@ -0,0 +1,127 @@ +/* Machine-dependent details of interruptible RPC messaging. 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. */ + + +#ifdef __mips64 +#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \ +({ \ + error_t err; \ + mach_port_t __rcv_name = (rcv_name); \ + mach_msg_timeout_t __timeout = (timeout); \ + mach_port_t __notify = (notify); \ + asm (".globl _hurd_intr_rpc_msg_do_trap\n" \ + ".globl _hurd_intr_rpc_msg_in_trap\n" \ + " move $4, %1\n" \ + " move $5, %2\n" \ + " move $6, %3\n" \ + " move $7, %4\n" \ + " move $8, %5\n" \ + " move $9, %6\n" \ + " move $10, %7\n" \ + " dli $2, -25\n" \ + "_hurd_intr_rpc_msg_do_trap: syscall\n" \ + "_hurd_intr_rpc_msg_in_trap: move %0, $2\n" \ + : "=r" (err) \ + : "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \ + "r" (__rcv_name), "r" (__timeout), "r" (__notify) \ + : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", \ + "$11", "$12", "$13", "$14", "$15", "$24", "$25", "$28"); \ + err; \ +}) +#else +#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \ +({ \ + error_t err; \ + mach_port_t __rcv_name = (rcv_name); \ + mach_msg_timeout_t __timeout = (timeout); \ + mach_port_t __notify = (notify); \ + asm (".globl _hurd_intr_rpc_msg_do_trap\n" \ + ".globl _hurd_intr_rpc_msg_in_trap\n" \ + " move $4, %1\n" \ + " move $5, %2\n" \ + " move $6, %3\n" \ + " move $7, %4\n" \ + " move $8, %5\n" \ + " move $9, %6\n" \ + " move $10, %7\n" \ + " li $2, -25\n" \ + "_hurd_intr_rpc_msg_do_trap: syscall\n" \ + "_hurd_intr_rpc_msg_in_trap: move %0, $2\n" \ + : "=r" (err) \ + : "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \ + "r" (__rcv_name), "r" (__timeout), "r" (__notify) \ + : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", \ + "$11", "$12", "$13", "$14", "$15", "$24", "$25", "$28"); \ + err; \ +}) +#endif + +static inline void +INTR_MSG_BACK_OUT (struct mips_thread_state *state) +{ + return; +} + +#include "hurdfault.h" + +static inline int +SYSCALL_EXAMINE (struct mips_thread_state *state, int *callno) +{ + u_int32_t *p = (void *) (state->pc - 4); + int result; + if (_hurdsig_catch_memory_fault (p)) + return 0; + if (result = (*p == 0x0000000c)) + /* The PC is just after a `syscall' instruction. + This is a system call in progress; v0($2) holds the call number. */ + *callno = state->r2; + _hurdsig_end_catch_fault (); + return 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; + }; + + +static inline mach_port_t +MSG_EXAMINE (struct mips_thread_state *state, int *msgid) +{ + mach_msg_header_t *msg; + mach_port_t send_port; + + msg = (mach_msg_header_t *) state->r4; + + if (_hurdsig_catch_memory_fault (msg)) + return MACH_PORT_NULL; + send_port = msg->msgh_remote_port; + *msgid = msg->msgh_id; + _hurdsig_end_catch_fault (); + + return send_port; +} diff --git a/sysdeps/mach/hurd/mips/longjmp-ctx.c b/sysdeps/mach/hurd/mips/longjmp-ctx.c new file mode 100644 index 0000000000..df04900e78 --- /dev/null +++ b/sysdeps/mach/hurd/mips/longjmp-ctx.c @@ -0,0 +1,41 @@ +/* Perform a `longjmp' on a `struct sigcontext'. 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 <setjmp.h> +#include <hurd/signal.h> +#include <string.h> + +void +_hurd_longjmp_sigcontext (struct sigcontext *scp, jmp_buf env, int retval) +{ + scp->sc_gpr[16] = env[0].__regs[0]; + scp->sc_gpr[17] = env[0].__regs[1]; + scp->sc_gpr[18] = env[0].__regs[2]; + scp->sc_gpr[19] = env[0].__regs[3]; + scp->sc_gpr[20] = env[0].__regs[4]; + scp->sc_gpr[21] = env[0].__regs[5]; + scp->sc_gpr[22] = env[0].__regs[6]; + scp->sc_gpr[23] = env[0].__regs[7]; + + scp->sc_gpr[28] = (int) env[0].__gp; + scp->sc_fp = (int) env[0].__fp; + scp->sc_sp = (int) env[0].__sp; + scp->sc_pc = (int) env[0].__pc; + scp->sc_gpr[2] = retval ?: 1; +} diff --git a/sysdeps/mach/hurd/mips/longjmp-ts.c b/sysdeps/mach/hurd/mips/longjmp-ts.c index 980a2ceb94..ea62bb1bf3 100644 --- a/sysdeps/mach/hurd/mips/longjmp-ts.c +++ b/sysdeps/mach/hurd/mips/longjmp-ts.c @@ -1,21 +1,21 @@ /* Perform a `longjmp' on a Mach thread_state. MIPS version. -Copyright (C) 1991, 1994 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 <setjmp.h> diff --git a/sysdeps/mach/hurd/mips/sigreturn.c b/sysdeps/mach/hurd/mips/sigreturn.c index 7396a8bb22..fe38fac1df 100644 --- a/sysdeps/mach/hurd/mips/sigreturn.c +++ b/sysdeps/mach/hurd/mips/sigreturn.c @@ -1,30 +1,32 @@ -/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc. -This file is part of the GNU C Library. +/* 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 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. + 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 <hurd/signal.h> #include <hurd/threadvar.h> #include <stdlib.h> +#include <mach/mips/mips_instruction.h> int __sigreturn (struct sigcontext *scp) { struct hurd_sigstate *ss; + struct hurd_userlink *link = (void *) &scp[1]; mach_port_t *reply_port; if (scp == NULL || (scp->sc_mask & _SIG_CANT_MASK)) @@ -36,6 +38,11 @@ __sigreturn (struct sigcontext *scp) ss = _hurd_self_sigstate (); __spin_lock (&ss->lock); + /* Remove the link on the `active resources' chain added by + _hurd_setup_sighandler. Its purpose was to make sure + that we got called; now we have, it is done. */ + _hurd_userlink_unlink (link); + /* Restore the set of blocked signals, and the intr_port slot. */ ss->blocked = scp->sc_mask; ss->intr_port = scp->sc_intr_port; @@ -48,15 +55,11 @@ __sigreturn (struct sigcontext *scp) 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; - /* Clear the intr_port slot, since we are not in fact doing - an interruptible RPC right now. If SS->intr_port is not null, - the SCP context is doing an interruptible RPC, but the signal - thread will examine us while we are blocked in the sig_post RPC. */ - ss->intr_port = MACH_PORT_NULL; __spin_unlock (&ss->lock); - __msg_sig_post (_hurd_msgport, 0, __mach_task_self ()); + __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) @@ -73,7 +76,17 @@ __sigreturn (struct sigcontext *scp) reply_port = (mach_port_t *) __hurd_threadvar_location (_HURD_THREADVAR_MIG_REPLY); if (*reply_port) - __mach_port_destroy (__mach_task_self (), *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; if (scp->sc_coproc_used & SC_COPROC_USE_FPU) @@ -83,30 +96,70 @@ __sigreturn (struct sigcontext *scp) asm volatile ("l.d $f" #n ",%0" : : "m" (scp->sc_fpr[n])) /* Restore floating-point registers. */ +#ifdef __mips64 restore_fpr (0); + restore_fpr (1); restore_fpr (2); + restore_fpr (3); restore_fpr (4); + restore_fpr (5); restore_fpr (6); + restore_fpr (7); restore_fpr (8); + restore_fpr (9); restore_fpr (10); + restore_fpr (11); restore_fpr (12); + restore_fpr (13); restore_fpr (14); + restore_fpr (15); restore_fpr (16); + restore_fpr (17); restore_fpr (18); + restore_fpr (19); restore_fpr (20); + restore_fpr (21); restore_fpr (22); + restore_fpr (23); restore_fpr (24); + restore_fpr (25); restore_fpr (26); + restore_fpr (27); restore_fpr (28); + restore_fpr (29); restore_fpr (30); + restore_fpr (31); +#else + restore_fpr (0); + restore_fpr (2); + restore_fpr (4); + restore_fpr (6); + restore_fpr (8); + restore_fpr (10); + restore_fpr (12); + restore_fpr (14); + restore_fpr (16); + restore_fpr (18); + restore_fpr (20); + restore_fpr (22); + restore_fpr (24); + restore_fpr (26); + restore_fpr (28); + restore_fpr (30); +#endif /* Restore the floating-point control/status register ($f31). */ asm volatile ("ctc1 %0,$f31" : : "r" (scp->sc_fpcsr)); } /* Load all the registers from the sigcontext. */ +#ifdef __mips64 +#define restore_gpr(n) \ + asm volatile ("ld $" #n ",%0" : : "m" (scpreg->sc_gpr[n - 1])) +#else #define restore_gpr(n) \ asm volatile ("lw $" #n ",%0" : : "m" (scpreg->sc_gpr[n - 1])) +#endif { register const struct sigcontext *const scpreg asm ("$1") = scp; @@ -157,9 +210,10 @@ __sigreturn (struct sigcontext *scp) at = &scpreg->sc_pc; /* This is an emulated instruction that will find at the address in $1 two words: the PC value to restore, and the $1 value to restore. */ - asm volatile (".word op_sigreturn"); - + asm volatile (".word %0" : : "i" (op_sigreturn)); asm volatile (".set reorder; .set at;"); + /* NOTREACHED */ + return at; /* To prevent optimization. */ } /* NOTREACHED */ diff --git a/sysdeps/mach/hurd/mips/trampoline.c b/sysdeps/mach/hurd/mips/trampoline.c index 03e3d1da6f..fbb7df508f 100644 --- a/sysdeps/mach/hurd/mips/trampoline.c +++ b/sysdeps/mach/hurd/mips/trampoline.c @@ -1,56 +1,58 @@ /* Set thread_state for sighandler, and sigcontext to recover. MIPS version. -Copyright (C) 1994, 1995 Free Software Foundation, Inc. -This file is part of the GNU C Library. + 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 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. + 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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 <hurd/userlink.h> #include "thread_state.h" - - -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; - }; +#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, long int sigcode, - int rpc_wait, + int signo, struct hurd_signal_detail *detail, + volatile int rpc_wait, struct machine_thread_all_state *state) { - - __label__ trampoline, rpc_wait_trampoline; - void *sigsp; + __label__ trampoline, rpc_wait_trampoline, firewall; + void *volatile sigsp; struct sigcontext *scp; + struct + { + int signo; + long int sigcode; + struct sigcontext *scp; /* Points to ctx, below. */ + void *sigreturn_addr; + void *sigreturn_returns_here; + struct sigcontext *return_scp; /* Same; arg to sigreturn. */ + struct sigcontext ctx; + struct hurd_userlink link; + } *stackframe; 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 (! setjmp (_hurd_sigthread_fault_env)) + if (! _hurdsig_catch_memory_fault (ss->context)) { memcpy (&state->basic, &ss->context->sc_mips_thread_state, sizeof (state->basic)); @@ -63,24 +65,17 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, sizeof (state->fpu)); state->set |= (1 << MIPS_FLOAT_STATE); } - assert (! rpc_wait); - /* The intr_port slot was cleared before sigreturn sent us the - sig_post that made us notice this pending signal, so - _hurd_internal_post_signal wouldn't do interrupt_operation. - After we return, our caller will set SCP->sc_intr_port (in the - new context) from SS->intr_port and clear SS->intr_port. Now - that we are restoring this old context recorded by sigreturn, - we want to restore its intr_port too; so store it in - SS->intr_port now, so it will end up in SCP->sc_intr_port - later. */ - ss->intr_port = ss->context->sc_intr_port; } - /* If the sigreturn context was bogus, just ignore it. */ - ss->context = NULL; } - else if (! machine_get_basic_state (ss->thread, state)) + + if (! machine_get_basic_state (ss->thread, state)) return NULL; + /* Save the original SP in the gratuitous s0 ($16) slot. + We may need to reset the SP (the `r29' slot) to avoid clobbering an + interrupted RPC frame. */ + state->basic.r16 = state->basic.r29; + if ((ss->actions[signo].sa_flags & SA_ONSTACK) && !(ss->sigaltstack.ss_flags & (SA_DISABLE|SA_ONSTACK))) { @@ -92,13 +87,46 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, else sigsp = (char *) state->basic.r29; - /* 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; + /* Push the arguments to call `trampoline' on the stack. */ + sigsp -= sizeof (*stackframe); + stackframe = sigsp; - if (! setjmp (_hurd_sigthread_fault_env)) + if (_hurdsig_catch_memory_fault (stackframe)) { + /* 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; + + extern void _hurdsig_longjmp_from_handler (void *, jmp_buf, int); + + /* Add a link to the thread's active-resources list. We mark this as + the only user of the "resource", so the cleanup function will be + called by any longjmp which is unwinding past the signal frame. + The cleanup function (in sigunwind.c) will make sure that all the + appropriate cleanups done by sigreturn are taken care of. */ + stackframe->link.cleanup = &_hurdsig_longjmp_from_handler; + stackframe->link.cleanup_data = &stackframe->ctx; + stackframe->link.resource.next = NULL; + stackframe->link.resource.prevp = NULL; + stackframe->link.thread.next = ss->active_resources; + stackframe->link.thread.prevp = &ss->active_resources; + if (stackframe->link.thread.next) + stackframe->link.thread.next->thread.prevp + = &stackframe->link.thread.next; + ss->active_resources = &stackframe->link; + + /* Set up the arguments for the signal handler. */ + stackframe->signo = signo; + stackframe->sigcode = detail->code; + stackframe->scp = stackframe->return_scp = scp = &stackframe->ctx; + stackframe->sigreturn_addr = &__sigreturn; + stackframe->sigreturn_returns_here = &&firewall; /* Crash on return. */ + /* Set up the sigcontext from the current state of the thread. */ scp->sc_onstack = ss->sigaltstack.ss_flags & SA_ONSTACK ? 1 : 0; @@ -110,24 +138,23 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, /* struct sigcontext is laid out so that starting at sc_cause mimics a struct mips_exc_state. */ - if (! machine_get_state (ss->thread, state, MIPS_EXC_STATE, - &state->exc, &scp->sc_cause, - sizeof (state->exc))) - return NULL; - if ((scp->sc_coproc_used & SC_COPROC_USE_FPU) && - /* struct sigcontext is laid out so that starting at sc_fpr - mimics a struct mips_float_state. This state - is only meaningful if the coprocessor was used. */ - ! machine_get_state (ss->thread, state, MIPS_FLOAT_STATE, - &state->fpu, - &scp->sc_mips_float_state, sizeof (state->fpu))) + ok = machine_get_state (ss->thread, state, MIPS_EXC_STATE, + &state->exc, &scp->sc_cause, + sizeof (state->exc)); + + if (ok && (scp->sc_coproc_used & SC_COPROC_USE_FPU)) + /* struct sigcontext is laid out so that starting at sc_fpr + mimics a struct mips_float_state. This state + is only meaningful if the coprocessor was used. */ + ok = machine_get_state (ss->thread, state, MIPS_FLOAT_STATE, + &state->fpu, &scp->sc_mips_float_state, + sizeof (state->fpu)); + + _hurdsig_end_catch_fault (); + + if (! ok) return NULL; } - else - /* 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; /* Modify the thread state to call the trampoline code on the new stack. */ if (rpc_wait) @@ -145,6 +172,12 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, starting with a0 ($4). */ struct mach_msg_trap_args *args = (void *) &state->basic.r4; + 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. */ @@ -156,17 +189,22 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, args->option |= MACH_RCV_TIMEOUT; args->timeout = _hurd_interrupted_rpc_timeout; + _hurdsig_end_catch_fault (); + state->basic.pc = (int) &&rpc_wait_trampoline; - state->basic.r29 = (int) sigsp; /* $29 is the stack pointer register. */ + /* The reply-receiving trampoline code runs initially on the original + user stack. We pass it the signal stack pointer in s4 ($20). */ + state->basic.r29 = state->basic.r16; /* Restore mach_msg syscall SP. */ + state->basic.r20 = (int) sigsp; /* After doing the message receive, the trampoline code will need to update the v0 ($2) 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 v1 ($3). */ - state->basic.r3 = (int) &scp->sc_gpr[1]; + trampoline code in s5 ($21). */ + state->basic.r21 = (int) &scp->sc_gpr[1]; /* We must preserve the mach_msg_trap args in a0..t2 ($4..$10). Pass the handler args to the trampoline code in s1..s3 ($17..$19). */ state->basic.r17 = signo; - state->basic.r18 = sigcode; + state->basic.r18 = detail->code; state->basic.r19 = (int) scp; } else @@ -174,12 +212,12 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, state->basic.pc = (int) &&trampoline; state->basic.r29 = (int) sigsp; state->basic.r4 = signo; - state->basic.r5 = sigcode; + state->basic.r5 = detail->code; state->basic.r6 = (int) scp; } - /* We pass the handler function to the trampoline code in at ($1). */ - state->basic.r1 = (int) handler; + /* We pass the handler function to the trampoline code in s6 ($22). */ + state->basic.r22 = (int) handler; /* In the callee-saved register s0 ($16), we save the SCP value to pass to __sigreturn after the handler returns. */ state->basic.r16 = (int) scp; @@ -197,21 +235,31 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, asm volatile (".set noat; .set noreorder; .set nomacro\n" /* Retry the interrupted mach_msg system call. */ +#ifdef __mips64 + "dli $2, -25\n" /* mach_msg_trap */ +#else "li $2, -25\n" /* mach_msg_trap */ +#endif "syscall\n" /* When the sigcontext was saved, v0 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 v0. So store the new v0 value into the sc_gpr[1] member of the sigcontext - (whose address is in v1 to make this code simpler). */ - "sw $2, ($3)\n" + (whose address is in s5 to make this code simpler). */ +#ifdef __mips64 + "sd $2, ($21)\n" +#else + "sw $2, ($21)\n" +#endif /* Since the argument registers needed to have the mach_msg_trap arguments, we've stored the arguments to the handler function in registers s1..s3 ($17..$19). */ "move $4, $17\n" "move $5, $18\n" - "move $6, $19\n"); + "move $6, $19\n" + /* Switch to the signal stack. */ + "move $29, $20\n"); trampoline: /* Entry point for running the handler normally. The arguments to the @@ -222,14 +270,23 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, a2 SCP */ asm volatile - ("jal $1; nop\n" /* Call the handler function. */ + ("move $25, $22\n" /* Copy s6 to t9 for MIPS ABI. */ + "jal $25; nop\n" /* Call the handler function. */ /* Call __sigreturn (SCP); this cannot return. */ - "j %0\n" +#ifdef __mips64 + "dla $1,%0\n" +#else + "la $1,%0\n" +#endif + "j $1\n" "move $4, $16" /* Set up arg from saved SCP in delay slot. */ : : "i" (&__sigreturn)); /* NOTREACHED */ asm volatile (".set reorder; .set at; .set macro"); + firewall: + asm volatile ("hlt: j hlt"); + return NULL; } |