| #ifndef _ASM_IA64_SIGCONTEXT_H |
| #define _ASM_IA64_SIGCONTEXT_H |
| |
| /* |
| * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co |
| * Copyright (C) 1998, 1999, 2001 David Mosberger-Tang <davidm@hpl.hp.com> |
| */ |
| |
| #include <asm/fpu.h> |
| |
| #define IA64_SC_FLAG_ONSTACK_BIT 0 /* is handler running on signal stack? */ |
| #define IA64_SC_FLAG_IN_SYSCALL_BIT 1 /* did signal interrupt a syscall? */ |
| #define IA64_SC_FLAG_FPH_VALID_BIT 2 /* is state in f[32]-f[127] valid? */ |
| |
| #define IA64_SC_FLAG_ONSTACK (1 << IA64_SC_FLAG_ONSTACK_BIT) |
| #define IA64_SC_FLAG_IN_SYSCALL (1 << IA64_SC_FLAG_IN_SYSCALL_BIT) |
| #define IA64_SC_FLAG_FPH_VALID (1 << IA64_SC_FLAG_FPH_VALID_BIT) |
| |
| # ifndef __ASSEMBLY__ |
| |
| /* |
| * Note on handling of register backing store: sc_ar_bsp contains the address that would |
| * be found in ar.bsp after executing a "cover" instruction the context in which the |
| * signal was raised. If signal delivery required switching to an alternate signal stack |
| * (sc_rbs_base is not NULL), the "dirty" partition (as it would exist after executing the |
| * imaginary "cover" instruction) is backed by the *alternate* signal stack, not the |
| * original one. In this case, sc_rbs_base contains the base address of the new register |
| * backing store. The number of registers in the dirty partition can be calculated as: |
| * |
| * ndirty = ia64_rse_num_regs(sc_rbs_base, sc_rbs_base + (sc_loadrs >> 16)) |
| * |
| */ |
| |
| struct sigcontext { |
| unsigned long sc_flags; /* see manifest constants above */ |
| unsigned long sc_nat; /* bit i == 1 iff scratch reg gr[i] is a NaT */ |
| stack_t sc_stack; /* previously active stack */ |
| |
| unsigned long sc_ip; /* instruction pointer */ |
| unsigned long sc_cfm; /* current frame marker */ |
| unsigned long sc_um; /* user mask bits */ |
| unsigned long sc_ar_rsc; /* register stack configuration register */ |
| unsigned long sc_ar_bsp; /* backing store pointer */ |
| unsigned long sc_ar_rnat; /* RSE NaT collection register */ |
| unsigned long sc_ar_ccv; /* compare and exchange compare value register */ |
| unsigned long sc_ar_unat; /* ar.unat of interrupted context */ |
| unsigned long sc_ar_fpsr; /* floating-point status register */ |
| unsigned long sc_ar_pfs; /* previous function state */ |
| unsigned long sc_ar_lc; /* loop count register */ |
| unsigned long sc_pr; /* predicate registers */ |
| unsigned long sc_br[8]; /* branch registers */ |
| /* Note: sc_gr[0] is used as the "uc_link" member of ucontext_t */ |
| unsigned long sc_gr[32]; /* general registers (static partition) */ |
| struct ia64_fpreg sc_fr[128]; /* floating-point registers */ |
| |
| unsigned long sc_rbs_base; /* NULL or new base of sighandler's rbs */ |
| unsigned long sc_loadrs; /* see description above */ |
| |
| unsigned long sc_ar25; /* cmp8xchg16 uses this */ |
| unsigned long sc_ar26; /* rsvd for scratch use */ |
| unsigned long sc_rsvd[12]; /* reserved for future use */ |
| /* |
| * The mask must come last so we can increase _NSIG_WORDS |
| * without breaking binary compatibility. |
| */ |
| sigset_t sc_mask; /* signal mask to restore after handler returns */ |
| }; |
| |
| # endif /* __ASSEMBLY__ */ |
| #endif /* _ASM_IA64_SIGCONTEXT_H */ |
