diff options
Diffstat (limited to 'linux-user/host/riscv/host-signal.h')
-rw-r--r-- | linux-user/host/riscv/host-signal.h | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/linux-user/host/riscv/host-signal.h b/linux-user/host/riscv/host-signal.h deleted file mode 100644 index a4f170efb0..0000000000 --- a/linux-user/host/riscv/host-signal.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * host-signal.h: signal info dependent on the host architecture - * - * Copyright (c) 2003-2005 Fabrice Bellard - * Copyright (c) 2021 Linaro Limited - * - * 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 RISCV_HOST_SIGNAL_H -#define RISCV_HOST_SIGNAL_H - -static inline uintptr_t host_signal_pc(ucontext_t *uc) -{ - return uc->uc_mcontext.__gregs[REG_PC]; -} - -static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) -{ - uc->uc_mcontext.__gregs[REG_PC] = pc; -} - -static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) -{ - /* - * Detect store by reading the instruction at the program counter. - * Do not read more than 16 bits, because we have not yet determined - * the size of the instruction. - */ - const uint16_t *pinsn = (const uint16_t *)host_signal_pc(uc); - uint16_t insn = pinsn[0]; - - /* 16-bit instructions */ - switch (insn & 0xe003) { - case 0xa000: /* c.fsd */ - case 0xc000: /* c.sw */ - case 0xe000: /* c.sd (rv64) / c.fsw (rv32) */ - case 0xa002: /* c.fsdsp */ - case 0xc002: /* c.swsp */ - case 0xe002: /* c.sdsp (rv64) / c.fswsp (rv32) */ - return true; - } - - /* 32-bit instructions, major opcodes */ - switch (insn & 0x7f) { - case 0x23: /* store */ - case 0x27: /* store-fp */ - return true; - case 0x2f: /* amo */ - /* - * The AMO function code is in bits 25-31, unread as yet. - * The AMO functions are LR (read), SC (write), and the - * rest are all read-modify-write. - */ - insn = pinsn[1]; - return (insn >> 11) != 2; /* LR */ - } - - return false; -} - -#endif |