1*6f52b16cSGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 243e40f25SDavid Howells #ifndef _ASM_IA64_SIGCONTEXT_H 343e40f25SDavid Howells #define _ASM_IA64_SIGCONTEXT_H 443e40f25SDavid Howells 543e40f25SDavid Howells /* 643e40f25SDavid Howells * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co 743e40f25SDavid Howells * Copyright (C) 1998, 1999, 2001 David Mosberger-Tang <davidm@hpl.hp.com> 843e40f25SDavid Howells */ 943e40f25SDavid Howells 1043e40f25SDavid Howells #include <asm/fpu.h> 1143e40f25SDavid Howells 1243e40f25SDavid Howells #define IA64_SC_FLAG_ONSTACK_BIT 0 /* is handler running on signal stack? */ 1343e40f25SDavid Howells #define IA64_SC_FLAG_IN_SYSCALL_BIT 1 /* did signal interrupt a syscall? */ 1443e40f25SDavid Howells #define IA64_SC_FLAG_FPH_VALID_BIT 2 /* is state in f[32]-f[127] valid? */ 1543e40f25SDavid Howells 1643e40f25SDavid Howells #define IA64_SC_FLAG_ONSTACK (1 << IA64_SC_FLAG_ONSTACK_BIT) 1743e40f25SDavid Howells #define IA64_SC_FLAG_IN_SYSCALL (1 << IA64_SC_FLAG_IN_SYSCALL_BIT) 1843e40f25SDavid Howells #define IA64_SC_FLAG_FPH_VALID (1 << IA64_SC_FLAG_FPH_VALID_BIT) 1943e40f25SDavid Howells 2043e40f25SDavid Howells # ifndef __ASSEMBLY__ 2143e40f25SDavid Howells 2243e40f25SDavid Howells /* 2343e40f25SDavid Howells * Note on handling of register backing store: sc_ar_bsp contains the address that would 2443e40f25SDavid Howells * be found in ar.bsp after executing a "cover" instruction the context in which the 2543e40f25SDavid Howells * signal was raised. If signal delivery required switching to an alternate signal stack 2643e40f25SDavid Howells * (sc_rbs_base is not NULL), the "dirty" partition (as it would exist after executing the 2743e40f25SDavid Howells * imaginary "cover" instruction) is backed by the *alternate* signal stack, not the 2843e40f25SDavid Howells * original one. In this case, sc_rbs_base contains the base address of the new register 2943e40f25SDavid Howells * backing store. The number of registers in the dirty partition can be calculated as: 3043e40f25SDavid Howells * 3143e40f25SDavid Howells * ndirty = ia64_rse_num_regs(sc_rbs_base, sc_rbs_base + (sc_loadrs >> 16)) 3243e40f25SDavid Howells * 3343e40f25SDavid Howells */ 3443e40f25SDavid Howells 3543e40f25SDavid Howells struct sigcontext { 3643e40f25SDavid Howells unsigned long sc_flags; /* see manifest constants above */ 3743e40f25SDavid Howells unsigned long sc_nat; /* bit i == 1 iff scratch reg gr[i] is a NaT */ 3843e40f25SDavid Howells stack_t sc_stack; /* previously active stack */ 3943e40f25SDavid Howells 4043e40f25SDavid Howells unsigned long sc_ip; /* instruction pointer */ 4143e40f25SDavid Howells unsigned long sc_cfm; /* current frame marker */ 4243e40f25SDavid Howells unsigned long sc_um; /* user mask bits */ 4343e40f25SDavid Howells unsigned long sc_ar_rsc; /* register stack configuration register */ 4443e40f25SDavid Howells unsigned long sc_ar_bsp; /* backing store pointer */ 4543e40f25SDavid Howells unsigned long sc_ar_rnat; /* RSE NaT collection register */ 4643e40f25SDavid Howells unsigned long sc_ar_ccv; /* compare and exchange compare value register */ 4743e40f25SDavid Howells unsigned long sc_ar_unat; /* ar.unat of interrupted context */ 4843e40f25SDavid Howells unsigned long sc_ar_fpsr; /* floating-point status register */ 4943e40f25SDavid Howells unsigned long sc_ar_pfs; /* previous function state */ 5043e40f25SDavid Howells unsigned long sc_ar_lc; /* loop count register */ 5143e40f25SDavid Howells unsigned long sc_pr; /* predicate registers */ 5243e40f25SDavid Howells unsigned long sc_br[8]; /* branch registers */ 5343e40f25SDavid Howells /* Note: sc_gr[0] is used as the "uc_link" member of ucontext_t */ 5443e40f25SDavid Howells unsigned long sc_gr[32]; /* general registers (static partition) */ 5543e40f25SDavid Howells struct ia64_fpreg sc_fr[128]; /* floating-point registers */ 5643e40f25SDavid Howells 5743e40f25SDavid Howells unsigned long sc_rbs_base; /* NULL or new base of sighandler's rbs */ 5843e40f25SDavid Howells unsigned long sc_loadrs; /* see description above */ 5943e40f25SDavid Howells 6043e40f25SDavid Howells unsigned long sc_ar25; /* cmp8xchg16 uses this */ 6143e40f25SDavid Howells unsigned long sc_ar26; /* rsvd for scratch use */ 6243e40f25SDavid Howells unsigned long sc_rsvd[12]; /* reserved for future use */ 6343e40f25SDavid Howells /* 6443e40f25SDavid Howells * The mask must come last so we can increase _NSIG_WORDS 6543e40f25SDavid Howells * without breaking binary compatibility. 6643e40f25SDavid Howells */ 6743e40f25SDavid Howells sigset_t sc_mask; /* signal mask to restore after handler returns */ 6843e40f25SDavid Howells }; 6943e40f25SDavid Howells 7043e40f25SDavid Howells # endif /* __ASSEMBLY__ */ 7143e40f25SDavid Howells #endif /* _ASM_IA64_SIGCONTEXT_H */ 72