mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 18:40:14 +00:00
107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/* Machine-dependent signal context structure for GNU Hurd. i386 version.
|
|
Copyright (C) 1991, 1992, 1994 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
/* 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. */
|
|
};
|
|
|
|
|
|
/* 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 */
|