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1 /* Machine-dependent signal context structure for GNU Hurd. i386 version.
2 Copyright (C) 1991-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #ifndef _BITS_SIGCONTEXT_H
20 #define _BITS_SIGCONTEXT_H 1
22 #if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
23 # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
26 /* Signal handlers are actually called:
27 void handler (int sig, int code, struct sigcontext *scp); */
29 #include <mach/machine/fp_reg.h>
31 /* State of this thread when the signal was taken. */
34 /* These first members are machine-independent. */
36 int sc_onstack
; /* Nonzero if running on sigstack. */
37 __sigset_t sc_mask
; /* Blocked signals to restore. */
39 /* MiG reply port this thread is using. */
40 unsigned int sc_reply_port
;
42 /* Port this thread is doing an interruptible RPC on. */
43 unsigned int sc_intr_port
;
45 /* Error code associated with this signal (interpreted as `error_t'). */
48 /* All following members are machine-dependent. The rest of this
49 structure is written to be laid out identically to:
51 struct i386_thread_state basic;
52 struct i386_float_state fpu;
54 trampoline.c knows this, so it must be changed if this changes. */
56 #define sc_i386_thread_state sc_gs /* Beginning of correspondence. */
57 /* Segment registers. */
63 /* "General" registers. These members are in the order that the i386
64 `pusha' and `popa' instructions use (`popa' ignores %esp). */
68 int sc_esp
; /* Not used; sc_uesp is used instead. */
74 int sc_eip
; /* Instruction pointer. */
75 int sc_cs
; /* Code segment register. */
77 int sc_efl
; /* Processor flags. */
79 int sc_uesp
; /* This stack pointer is used. */
80 int sc_ss
; /* Stack segment register. */
82 /* Following mimics struct i386_float_state. Structures and symbolic
83 values can be found in <mach/i386/fp_reg.h>. */
84 #define sc_i386_float_state sc_fpkind
85 int sc_fpkind
; /* FP_NO, FP_387, etc. */
86 int sc_fpused
; /* If zero, ignore rest of float state. */
87 struct i386_fp_save sc_fpsave
;
88 struct i386_fp_regs sc_fpregs
;
89 int sc_fpexcsr
; /* FPSR including exception bits. */
92 /* Traditional BSD names for some members. */
93 #define sc_sp sc_uesp /* Stack pointer. */
94 #define sc_fp sc_ebp /* Frame pointer. */
95 #define sc_pc sc_eip /* Process counter. */
99 /* Codes for SIGFPE. */
100 #define FPE_INTOVF_TRAP 0x1 /* integer overflow */
101 #define FPE_INTDIV_FAULT 0x2 /* integer divide by zero */
102 #define FPE_FLTOVF_FAULT 0x3 /* floating overflow */
103 #define FPE_FLTDIV_FAULT 0x4 /* floating divide by zero */
104 #define FPE_FLTUND_FAULT 0x5 /* floating underflow */
105 #define FPE_SUBRNG_FAULT 0x7 /* BOUNDS instruction failed */
106 #define FPE_FLTDNR_FAULT 0x8 /* denormalized operand */
107 #define FPE_FLTINX_FAULT 0x9 /* floating loss of precision */
108 #define FPE_EMERR_FAULT 0xa /* mysterious emulation error 33 */
109 #define FPE_EMBND_FAULT 0xb /* emulation BOUNDS instruction failed */
111 /* Codes for SIGILL. */
112 #define ILL_INVOPR_FAULT 0x1 /* invalid operation */
113 #define ILL_STACK_FAULT 0x2 /* fault on microkernel stack access */
114 #define ILL_FPEOPR_FAULT 0x3 /* invalid floating operation */
116 /* Codes for SIGTRAP. */
117 #define DBG_SINGLE_TRAP 0x1 /* single step */
118 #define DBG_BRKPNT_FAULT 0x2 /* breakpoint instruction */
120 #endif /* bits/sigcontext.h */