[thirdparty/glibc.git] / sysdeps / mach / hurd / i386 / bits / sigcontext.h

/* Machine-dependent signal context structure for GNU Hurd.  i386 version.
   Copyright (C) 1991-2023 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
   <https://www.gnu.org/licenses/>.  */

#ifndef _BITS_SIGCONTEXT_H
#define _BITS_SIGCONTEXT_H 1

#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif

/* Signal handlers are actually called:
   void handler (int sig, int code, struct sigcontext *scp);  */

#include <bits/types/__sigset_t.h>
#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


/* The deprecated sigcode values below are passed as an extra, non-portable
   argument to regular signal handlers.  You should use SA_SIGINFO handlers
   instead, which use the standard POSIX signal codes.  */

/* 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 /* bits/sigcontext.h */
Commit	Line	Data
28f540f4	1	/* Machine-dependent signal context structure for GNU Hurd. i386 version.
6d7e8eda	2	Copyright (C) 1991-2023 Free Software Foundation, Inc.
478b92f0	3	This file is part of the GNU C Library.
28f540f4	4
478b92f0	5	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	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.
28f540f4	9
478b92f0 UD	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
41bdb6e2	13	Lesser General Public License for more details.
28f540f4	14
41bdb6e2	15	You should have received a copy of the GNU Lesser General Public
59ba27a6	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
28f540f4	18
c66b29f9 ZW	19	#ifndef _BITS_SIGCONTEXT_H
	20	#define _BITS_SIGCONTEXT_H 1
	21
f58f41f1	22	#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
f4017d20 UD	23	# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
	24	#endif
	25
28f540f4 RM	26	/* Signal handlers are actually called:
	27	void handler (int sig, int code, struct sigcontext scp); /
	28
a992f506	29	#include <bits/types/__sigset_t.h>
28f540f4 RM	30	#include <mach/machine/fp_reg.h>
	31
	32	/* State of this thread when the signal was taken. */
	33	struct sigcontext
	34	{
	35	/* These first members are machine-independent. */
	36
	37	int sc_onstack; /* Nonzero if running on sigstack. */
	38	__sigset_t sc_mask; /* Blocked signals to restore. */
	39
	40	/* MiG reply port this thread is using. */
	41	unsigned int sc_reply_port;
	42
	43	/* Port this thread is doing an interruptible RPC on. */
	44	unsigned int sc_intr_port;
	45
	46	/* Error code associated with this signal (interpreted as `error_t'). */
	47	int sc_error;
	48
	49	/* All following members are machine-dependent. The rest of this
	50	structure is written to be laid out identically to:
	51	{
478b92f0 UD	52	struct i386_thread_state basic;
478b92f0 UD	53	struct i386_float_state fpu;
28f540f4 RM	54	}
	55	trampoline.c knows this, so it must be changed if this changes. */
	56
	57	#define sc_i386_thread_state sc_gs /* Beginning of correspondence. */
	58	/* Segment registers. */
	59	int sc_gs;
	60	int sc_fs;
	61	int sc_es;
	62	int sc_ds;
478b92f0	63
28f540f4 RM	64	/* "General" registers. These members are in the order that the i386
	65	`pusha' and `popa' instructions use (`popa' ignores %esp). */
	66	int sc_edi;
	67	int sc_esi;
	68	int sc_ebp;
	69	int sc_esp; /* Not used; sc_uesp is used instead. */
	70	int sc_ebx;
	71	int sc_edx;
	72	int sc_ecx;
	73	int sc_eax;
478b92f0	74
28f540f4 RM	75	int sc_eip; /* Instruction pointer. */
28f540f4 RM	76	int sc_cs; /* Code segment register. */
478b92f0	77
28f540f4 RM	78	int sc_efl; /* Processor flags. */
	79
	80	int sc_uesp; /* This stack pointer is used. */
	81	int sc_ss; /* Stack segment register. */
	82
	83	/* Following mimics struct i386_float_state. Structures and symbolic
	84	values can be found in <mach/i386/fp_reg.h>. */
	85	#define sc_i386_float_state sc_fpkind
	86	int sc_fpkind; /* FP_NO, FP_387, etc. */
	87	int sc_fpused; /* If zero, ignore rest of float state. */
	88	struct i386_fp_save sc_fpsave;
	89	struct i386_fp_regs sc_fpregs;
	90	int sc_fpexcsr; /* FPSR including exception bits. */
	91	};
	92
0cdd0c51 MK	93	/* Traditional BSD names for some members. */
	94	#define sc_sp sc_uesp /* Stack pointer. */
	95	#define sc_fp sc_ebp /* Frame pointer. */
	96	#define sc_pc sc_eip /* Process counter. */
	97	#define sc_ps sc_efl
	98
28f540f4	99
d865ff74 JK	100	/* The deprecated sigcode values below are passed as an extra, non-portable
	101	argument to regular signal handlers. You should use SA_SIGINFO handlers
	102	instead, which use the standard POSIX signal codes. */
	103
28f540f4 RM	104	/* Codes for SIGFPE. */
	105	#define FPE_INTOVF_TRAP 0x1 /* integer overflow */
	106	#define FPE_INTDIV_FAULT 0x2 /* integer divide by zero */
	107	#define FPE_FLTOVF_FAULT 0x3 /* floating overflow */
	108	#define FPE_FLTDIV_FAULT 0x4 /* floating divide by zero */
	109	#define FPE_FLTUND_FAULT 0x5 /* floating underflow */
	110	#define FPE_SUBRNG_FAULT 0x7 /* BOUNDS instruction failed */
	111	#define FPE_FLTDNR_FAULT 0x8 /* denormalized operand */
	112	#define FPE_FLTINX_FAULT 0x9 /* floating loss of precision */
	113	#define FPE_EMERR_FAULT 0xa /* mysterious emulation error 33 */
	114	#define FPE_EMBND_FAULT 0xb /* emulation BOUNDS instruction failed */
	115
	116	/* Codes for SIGILL. */
	117	#define ILL_INVOPR_FAULT 0x1 /* invalid operation */
	118	#define ILL_STACK_FAULT 0x2 /* fault on microkernel stack access */
	119	#define ILL_FPEOPR_FAULT 0x3 /* invalid floating operation */
	120
	121	/* Codes for SIGTRAP. */
	122	#define DBG_SINGLE_TRAP 0x1 /* single step */
	123	#define DBG_BRKPNT_FAULT 0x2 /* breakpoint instruction */
f58f41f1	124
c66b29f9	125	#endif /* bits/sigcontext.h */