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126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/* Machine-dependent signal context structure for GNU Hurd. i386 version.
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Copyright (C) 1991-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _BITS_SIGCONTEXT_H
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#define _BITS_SIGCONTEXT_H 1
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#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
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# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
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#endif
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/* Signal handlers are actually called:
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void handler (int sig, int code, struct sigcontext *scp); */
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#include <bits/types/__sigset_t.h>
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#include <mach/machine/fp_reg.h>
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/* State of this thread when the signal was taken. */
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struct sigcontext
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{
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/* These first members are machine-independent. */
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int sc_onstack; /* Nonzero if running on sigstack. */
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__sigset_t sc_mask; /* Blocked signals to restore. */
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/* MiG reply port this thread is using. */
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unsigned int sc_reply_port;
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/* Port this thread is doing an interruptible RPC on. */
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unsigned int sc_intr_port;
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/* Error code associated with this signal (interpreted as `error_t'). */
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int sc_error;
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/* All following members are machine-dependent. The rest of this
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structure is written to be laid out identically to:
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{
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struct i386_thread_state basic;
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struct i386_float_state fpu;
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}
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trampoline.c knows this, so it must be changed if this changes. */
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#define sc_i386_thread_state sc_gs /* Beginning of correspondence. */
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/* Segment registers. */
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int sc_gs;
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int sc_fs;
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int sc_es;
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int sc_ds;
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/* "General" registers. These members are in the order that the i386
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`pusha' and `popa' instructions use (`popa' ignores %esp). */
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int sc_edi;
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int sc_esi;
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int sc_ebp;
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int sc_esp; /* Not used; sc_uesp is used instead. */
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int sc_ebx;
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int sc_edx;
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int sc_ecx;
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int sc_eax;
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int sc_eip; /* Instruction pointer. */
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int sc_cs; /* Code segment register. */
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int sc_efl; /* Processor flags. */
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int sc_uesp; /* This stack pointer is used. */
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int sc_ss; /* Stack segment register. */
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/* Following mimics struct i386_float_state. Structures and symbolic
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values can be found in <mach/i386/fp_reg.h>. */
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#define sc_i386_float_state sc_fpkind
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int sc_fpkind; /* FP_NO, FP_387, etc. */
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int sc_fpused; /* If zero, ignore rest of float state. */
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struct i386_fp_save sc_fpsave;
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struct i386_fp_regs sc_fpregs;
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int sc_fpexcsr; /* FPSR including exception bits. */
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};
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/* Traditional BSD names for some members. */
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#define sc_sp sc_uesp /* Stack pointer. */
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#define sc_fp sc_ebp /* Frame pointer. */
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#define sc_pc sc_eip /* Process counter. */
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#define sc_ps sc_efl
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/* The deprecated sigcode values below are passed as an extra, non-portable
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argument to regular signal handlers. You should use SA_SIGINFO handlers
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instead, which use the standard POSIX signal codes. */
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/* Codes for SIGFPE. */
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#define FPE_INTOVF_TRAP 0x1 /* integer overflow */
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#define FPE_INTDIV_FAULT 0x2 /* integer divide by zero */
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#define FPE_FLTOVF_FAULT 0x3 /* floating overflow */
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#define FPE_FLTDIV_FAULT 0x4 /* floating divide by zero */
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#define FPE_FLTUND_FAULT 0x5 /* floating underflow */
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#define FPE_SUBRNG_FAULT 0x7 /* BOUNDS instruction failed */
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#define FPE_FLTDNR_FAULT 0x8 /* denormalized operand */
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#define FPE_FLTINX_FAULT 0x9 /* floating loss of precision */
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#define FPE_EMERR_FAULT 0xa /* mysterious emulation error 33 */
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#define FPE_EMBND_FAULT 0xb /* emulation BOUNDS instruction failed */
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/* Codes for SIGILL. */
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#define ILL_INVOPR_FAULT 0x1 /* invalid operation */
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#define ILL_STACK_FAULT 0x2 /* fault on microkernel stack access */
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#define ILL_FPEOPR_FAULT 0x3 /* invalid floating operation */
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/* Codes for SIGTRAP. */
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#define DBG_SINGLE_TRAP 0x1 /* single step */
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#define DBG_BRKPNT_FAULT 0x2 /* breakpoint instruction */
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#endif /* bits/sigcontext.h */
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