diff options
Diffstat (limited to 'libc/sysdeps/mach/hurd/i386/bits/sigcontext.h')
-rw-r--r-- | libc/sysdeps/mach/hurd/i386/bits/sigcontext.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libc/sysdeps/mach/hurd/i386/bits/sigcontext.h b/libc/sysdeps/mach/hurd/i386/bits/sigcontext.h new file mode 100644 index 000000000..a78dd2f27 --- /dev/null +++ b/libc/sysdeps/mach/hurd/i386/bits/sigcontext.h @@ -0,0 +1,120 @@ +/* Machine-dependent signal context structure for GNU Hurd. i386 version. + Copyright (C) 1991, 1992, 1994, 1997, 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. */ + +#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H +# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead." +#endif + +#ifndef sc_pc + +/* Signal handlers are actually called: + void handler (int sig, int code, struct sigcontext *scp); */ + +#include <mach/machine/fp_reg.h> + +/* 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 i386_thread_state basic; + struct i386_float_state fpu; + } + trampoline.c knows this, so it must be changed if this changes. */ + +#define sc_i386_thread_state sc_gs /* Beginning of correspondence. */ + /* Segment registers. */ + int sc_gs; + int sc_fs; + int sc_es; + int sc_ds; + + /* "General" registers. These members are in the order that the i386 + `pusha' and `popa' instructions use (`popa' ignores %esp). */ + int sc_edi; + int sc_esi; + int sc_ebp; + int sc_esp; /* Not used; sc_uesp is used instead. */ + int sc_ebx; + int sc_edx; + int sc_ecx; + int sc_eax; + + int sc_eip; /* Instruction pointer. */ + int sc_cs; /* Code segment register. */ + + int sc_efl; /* Processor flags. */ + + int sc_uesp; /* This stack pointer is used. */ + int sc_ss; /* Stack segment register. */ + + /* Following mimics struct i386_float_state. Structures and symbolic + values can be found in <mach/i386/fp_reg.h>. */ +#define sc_i386_float_state sc_fpkind + int sc_fpkind; /* FP_NO, FP_387, etc. */ + int sc_fpused; /* If zero, ignore rest of float state. */ + struct i386_fp_save sc_fpsave; + struct i386_fp_regs sc_fpregs; + int sc_fpexcsr; /* FPSR including exception bits. */ + }; + +/* Traditional BSD names for some members. */ +#define sc_sp sc_uesp /* Stack pointer. */ +#define sc_fp sc_ebp /* Frame pointer. */ +#define sc_pc sc_eip /* Process counter. */ +#define sc_ps sc_efl + + +/* Codes for SIGFPE. */ +#define FPE_INTOVF_TRAP 0x1 /* integer overflow */ +#define FPE_INTDIV_FAULT 0x2 /* integer divide by zero */ +#define FPE_FLTOVF_FAULT 0x3 /* floating overflow */ +#define FPE_FLTDIV_FAULT 0x4 /* floating divide by zero */ +#define FPE_FLTUND_FAULT 0x5 /* floating underflow */ +#define FPE_SUBRNG_FAULT 0x7 /* BOUNDS instruction failed */ +#define FPE_FLTDNR_FAULT 0x8 /* denormalized operand */ +#define FPE_FLTINX_FAULT 0x9 /* floating loss of precision */ +#define FPE_EMERR_FAULT 0xa /* mysterious emulation error 33 */ +#define FPE_EMBND_FAULT 0xb /* emulation BOUNDS instruction failed */ + +/* Codes for SIGILL. */ +#define ILL_INVOPR_FAULT 0x1 /* invalid operation */ +#define ILL_STACK_FAULT 0x2 /* fault on microkernel stack access */ +#define ILL_FPEOPR_FAULT 0x3 /* invalid floating operation */ + +/* Codes for SIGTRAP. */ +#define DBG_SINGLE_TRAP 0x1 /* single step */ +#define DBG_BRKPNT_FAULT 0x2 /* breakpoint instruction */ + +#endif /* sc_pc */ |