1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _ASM_IA64_SIGCONTEXT_H 3*4882a593Smuzhiyun #define _ASM_IA64_SIGCONTEXT_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co 7*4882a593Smuzhiyun * Copyright (C) 1998, 1999, 2001 David Mosberger-Tang <davidm@hpl.hp.com> 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <asm/fpu.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #define IA64_SC_FLAG_ONSTACK_BIT 0 /* is handler running on signal stack? */ 13*4882a593Smuzhiyun #define IA64_SC_FLAG_IN_SYSCALL_BIT 1 /* did signal interrupt a syscall? */ 14*4882a593Smuzhiyun #define IA64_SC_FLAG_FPH_VALID_BIT 2 /* is state in f[32]-f[127] valid? */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #define IA64_SC_FLAG_ONSTACK (1 << IA64_SC_FLAG_ONSTACK_BIT) 17*4882a593Smuzhiyun #define IA64_SC_FLAG_IN_SYSCALL (1 << IA64_SC_FLAG_IN_SYSCALL_BIT) 18*4882a593Smuzhiyun #define IA64_SC_FLAG_FPH_VALID (1 << IA64_SC_FLAG_FPH_VALID_BIT) 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun # ifndef __ASSEMBLY__ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* 23*4882a593Smuzhiyun * Note on handling of register backing store: sc_ar_bsp contains the address that would 24*4882a593Smuzhiyun * be found in ar.bsp after executing a "cover" instruction the context in which the 25*4882a593Smuzhiyun * signal was raised. If signal delivery required switching to an alternate signal stack 26*4882a593Smuzhiyun * (sc_rbs_base is not NULL), the "dirty" partition (as it would exist after executing the 27*4882a593Smuzhiyun * imaginary "cover" instruction) is backed by the *alternate* signal stack, not the 28*4882a593Smuzhiyun * original one. In this case, sc_rbs_base contains the base address of the new register 29*4882a593Smuzhiyun * backing store. The number of registers in the dirty partition can be calculated as: 30*4882a593Smuzhiyun * 31*4882a593Smuzhiyun * ndirty = ia64_rse_num_regs(sc_rbs_base, sc_rbs_base + (sc_loadrs >> 16)) 32*4882a593Smuzhiyun * 33*4882a593Smuzhiyun */ 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun struct sigcontext { 36*4882a593Smuzhiyun unsigned long sc_flags; /* see manifest constants above */ 37*4882a593Smuzhiyun unsigned long sc_nat; /* bit i == 1 iff scratch reg gr[i] is a NaT */ 38*4882a593Smuzhiyun stack_t sc_stack; /* previously active stack */ 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun unsigned long sc_ip; /* instruction pointer */ 41*4882a593Smuzhiyun unsigned long sc_cfm; /* current frame marker */ 42*4882a593Smuzhiyun unsigned long sc_um; /* user mask bits */ 43*4882a593Smuzhiyun unsigned long sc_ar_rsc; /* register stack configuration register */ 44*4882a593Smuzhiyun unsigned long sc_ar_bsp; /* backing store pointer */ 45*4882a593Smuzhiyun unsigned long sc_ar_rnat; /* RSE NaT collection register */ 46*4882a593Smuzhiyun unsigned long sc_ar_ccv; /* compare and exchange compare value register */ 47*4882a593Smuzhiyun unsigned long sc_ar_unat; /* ar.unat of interrupted context */ 48*4882a593Smuzhiyun unsigned long sc_ar_fpsr; /* floating-point status register */ 49*4882a593Smuzhiyun unsigned long sc_ar_pfs; /* previous function state */ 50*4882a593Smuzhiyun unsigned long sc_ar_lc; /* loop count register */ 51*4882a593Smuzhiyun unsigned long sc_pr; /* predicate registers */ 52*4882a593Smuzhiyun unsigned long sc_br[8]; /* branch registers */ 53*4882a593Smuzhiyun /* Note: sc_gr[0] is used as the "uc_link" member of ucontext_t */ 54*4882a593Smuzhiyun unsigned long sc_gr[32]; /* general registers (static partition) */ 55*4882a593Smuzhiyun struct ia64_fpreg sc_fr[128]; /* floating-point registers */ 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun unsigned long sc_rbs_base; /* NULL or new base of sighandler's rbs */ 58*4882a593Smuzhiyun unsigned long sc_loadrs; /* see description above */ 59*4882a593Smuzhiyun 60*4882a593Smuzhiyun unsigned long sc_ar25; /* cmp8xchg16 uses this */ 61*4882a593Smuzhiyun unsigned long sc_ar26; /* rsvd for scratch use */ 62*4882a593Smuzhiyun unsigned long sc_rsvd[12]; /* reserved for future use */ 63*4882a593Smuzhiyun /* 64*4882a593Smuzhiyun * The mask must come last so we can increase _NSIG_WORDS 65*4882a593Smuzhiyun * without breaking binary compatibility. 66*4882a593Smuzhiyun */ 67*4882a593Smuzhiyun sigset_t sc_mask; /* signal mask to restore after handler returns */ 68*4882a593Smuzhiyun }; 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun # endif /* __ASSEMBLY__ */ 71*4882a593Smuzhiyun #endif /* _ASM_IA64_SIGCONTEXT_H */ 72