diff options
Diffstat (limited to 'sysdeps/mach/hurd/i386')
| -rw-r--r-- | sysdeps/mach/hurd/i386/intr-msg.h | 55 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/i386/trampoline.c | 16 |
2 files changed, 56 insertions, 15 deletions
diff --git a/sysdeps/mach/hurd/i386/intr-msg.h b/sysdeps/mach/hurd/i386/intr-msg.h index 353a6d2acd..43d244a182 100644 --- a/sysdeps/mach/hurd/i386/intr-msg.h +++ b/sysdeps/mach/hurd/i386/intr-msg.h @@ -1,5 +1,5 @@ /* Machine-dependent details of interruptible RPC messaging. i386 version. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 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 @@ -45,3 +45,56 @@ INTR_MSG_BACK_OUT (struct i386_thread_state *state) else state->ecx = state->uesp; } + +#include "hurdfault.h" + +static inline int +SYSCALL_EXAMINE (struct i386_thread_state *state, int *callno) +{ + struct { unsigned int c[2]; } *p = (void *) (state->eip - 7); + int result; + if (_hurdsig_catch_memory_fault (p)) + return 0; + if (result = p->c[0] == 0x0000009a && (p->c[1] & 0x00ffffff) == 0x00000700) + /* The PC is just after an `lcall $7,$0' instruction. + This is a system call in progress; %eax holds the call number. */ + *callno = state->eax; + _hurdsig_end_catch_fault (); + return result; +} + + +struct mach_msg_trap_args + { + void *retaddr; /* Address mach_msg_trap will return to. */ + /* 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 i386_thread_state *state, int *msgid) +{ + const struct mach_msg_trap_args *args = (const void *) state->uesp; + mach_msg_header_t *msg; + mach_port_t send_port; + + if (_hurdsig_catch_memory_fault (args)) + return MACH_PORT_NULL; + msg = args->msg; + _hurdsig_end_catch_fault (); + + 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/i386/trampoline.c b/sysdeps/mach/hurd/i386/trampoline.c index f64539a384..bd91c24304 100644 --- a/sysdeps/mach/hurd/i386/trampoline.c +++ b/sysdeps/mach/hurd/i386/trampoline.c @@ -23,21 +23,9 @@ Cambridge, MA 02139, USA. */ #include <assert.h> #include <errno.h> #include "hurdfault.h" +#include "intr-msg.h" -struct mach_msg_trap_args - { - void *retaddr; /* Address mach_msg_trap will return to. */ - /* 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; - }; - struct sigcontext * _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, int signo, long int sigcode, @@ -94,7 +82,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, per-thread variables, cthreads. */ } /* This code has intimate knowledge of the special mach_msg system call - done in intr-msg.c; that code does: + done in intr-msg.c; that code does (see intr-msg.h): movl %esp, %ecx leal ARGS, %esp _hurd_intr_rpc_msg_cx_sp: movl $-25, %eax |