| /* Machine-dependent signal context structure for GNU Hurd. i386 version. |
| Copyright (C) 1991-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #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 */ |
