| /* |
| * host-signal.h: signal info dependent on the host architecture |
| * |
| * Copyright (c) 2003-2005 Fabrice Bellard |
| * Copyright (c) 2021 WANG Xuerui <git@xen0n.name> |
| * |
| * This work is licensed under the terms of the GNU LGPL, version 2.1 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #ifndef LOONGARCH64_HOST_SIGNAL_H |
| #define LOONGARCH64_HOST_SIGNAL_H |
| |
| /* The third argument to a SA_SIGINFO handler is ucontext_t. */ |
| typedef ucontext_t host_sigcontext; |
| |
| static inline uintptr_t host_signal_pc(host_sigcontext *uc) |
| { |
| return uc->uc_mcontext.__pc; |
| } |
| |
| static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc) |
| { |
| uc->uc_mcontext.__pc = pc; |
| } |
| |
| static inline void *host_signal_mask(host_sigcontext *uc) |
| { |
| return &uc->uc_sigmask; |
| } |
| |
| static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc) |
| { |
| const uint32_t *pinsn = (const uint32_t *)host_signal_pc(uc); |
| uint32_t insn = pinsn[0]; |
| |
| /* Detect store by reading the instruction at the program counter. */ |
| switch ((insn >> 26) & 0b111111) { |
| case 0b001000: /* {ll,sc}.[wd] */ |
| switch ((insn >> 24) & 0b11) { |
| case 0b01: /* sc.w */ |
| case 0b11: /* sc.d */ |
| return true; |
| } |
| break; |
| case 0b001001: /* {ld,st}ox4.[wd] ({ld,st}ptr.[wd]) */ |
| switch ((insn >> 24) & 0b11) { |
| case 0b01: /* stox4.w (stptr.w) */ |
| case 0b11: /* stox4.d (stptr.d) */ |
| return true; |
| } |
| break; |
| case 0b001010: /* {ld,st}.* family */ |
| switch ((insn >> 22) & 0b1111) { |
| case 0b0100: /* st.b */ |
| case 0b0101: /* st.h */ |
| case 0b0110: /* st.w */ |
| case 0b0111: /* st.d */ |
| case 0b1101: /* fst.s */ |
| case 0b1111: /* fst.d */ |
| return true; |
| } |
| break; |
| case 0b001110: /* indexed, atomic, bounds-checking memory operations */ |
| switch ((insn >> 15) & 0b11111111111) { |
| case 0b00000100000: /* stx.b */ |
| case 0b00000101000: /* stx.h */ |
| case 0b00000110000: /* stx.w */ |
| case 0b00000111000: /* stx.d */ |
| case 0b00001110000: /* fstx.s */ |
| case 0b00001111000: /* fstx.d */ |
| case 0b00011101100: /* fstgt.s */ |
| case 0b00011101101: /* fstgt.d */ |
| case 0b00011101110: /* fstle.s */ |
| case 0b00011101111: /* fstle.d */ |
| case 0b00011111000: /* stgt.b */ |
| case 0b00011111001: /* stgt.h */ |
| case 0b00011111010: /* stgt.w */ |
| case 0b00011111011: /* stgt.d */ |
| case 0b00011111100: /* stle.b */ |
| case 0b00011111101: /* stle.h */ |
| case 0b00011111110: /* stle.w */ |
| case 0b00011111111: /* stle.d */ |
| case 0b00011000000 ... 0b00011100011: /* am* insns */ |
| return true; |
| } |
| break; |
| } |
| |
| return false; |
| } |
| |
| #endif |
