host-signal.h (1831B)
1 /* 2 * host-signal.h: signal info dependent on the host architecture 3 * 4 * Copyright (c) 2003-2005 Fabrice Bellard 5 * Copyright (c) 2021 Linaro Limited 6 * 7 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. 8 * See the COPYING file in the top-level directory. 9 */ 10 11 #ifndef MIPS_HOST_SIGNAL_H 12 #define MIPS_HOST_SIGNAL_H 13 14 /* The third argument to a SA_SIGINFO handler is ucontext_t. */ 15 typedef ucontext_t host_sigcontext; 16 17 static inline uintptr_t host_signal_pc(host_sigcontext *uc) 18 { 19 return uc->uc_mcontext.pc; 20 } 21 22 static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc) 23 { 24 uc->uc_mcontext.pc = pc; 25 } 26 27 static inline void *host_signal_mask(host_sigcontext *uc) 28 { 29 return &uc->uc_sigmask; 30 } 31 32 #if defined(__misp16) || defined(__mips_micromips) 33 #error "Unsupported encoding" 34 #endif 35 36 static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc) 37 { 38 uint32_t insn = *(uint32_t *)host_signal_pc(uc); 39 40 /* Detect all store instructions at program counter. */ 41 switch ((insn >> 26) & 077) { 42 case 050: /* SB */ 43 case 051: /* SH */ 44 case 052: /* SWL */ 45 case 053: /* SW */ 46 case 054: /* SDL */ 47 case 055: /* SDR */ 48 case 056: /* SWR */ 49 case 070: /* SC */ 50 case 071: /* SWC1 */ 51 case 074: /* SCD */ 52 case 075: /* SDC1 */ 53 case 077: /* SD */ 54 #if !defined(__mips_isa_rev) || __mips_isa_rev < 6 55 case 072: /* SWC2 */ 56 case 076: /* SDC2 */ 57 #endif 58 return true; 59 case 023: /* COP1X */ 60 /* 61 * Required in all versions of MIPS64 since 62 * MIPS64r1 and subsequent versions of MIPS32r2. 63 */ 64 switch (insn & 077) { 65 case 010: /* SWXC1 */ 66 case 011: /* SDXC1 */ 67 case 015: /* SUXC1 */ 68 return true; 69 } 70 break; 71 } 72 return false; 73 } 74 75 #endif