| 1 | /* |
| 2 | * RISC-V signal definitions |
| 3 | * |
| 4 | * Copyright (c) 2019 Mark Corbin |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | #include "qemu/osdep.h" |
| 20 | |
| 21 | #include "qemu.h" |
| 22 | |
| 23 | /* |
| 24 | * Compare with sendsig() in riscv/riscv/exec_machdep.c |
| 25 | * Assumes that target stack frame memory is locked. |
| 26 | */ |
| 27 | abi_long |
| 28 | set_sigtramp_args(CPURISCVState *regs, int sig, struct target_sigframe *frame, |
| 29 | abi_ulong frame_addr, struct target_sigaction *ka) |
| 30 | { |
| 31 | /* |
| 32 | * Arguments to signal handler: |
| 33 | * a0 (10) = signal number |
| 34 | * a1 (11) = siginfo pointer |
| 35 | * a2 (12) = ucontext pointer |
| 36 | * pc = signal pointer handler |
| 37 | * sp (2) = sigframe pointer |
| 38 | * ra (1) = sigtramp at base of user stack |
| 39 | */ |
| 40 | |
| 41 | regs->gpr[xA0] = sig; |
| 42 | regs->gpr[xA1] = frame_addr + |
| 43 | offsetof(struct target_sigframe, sf_si); |
| 44 | regs->gpr[xA2] = frame_addr + |
| 45 | offsetof(struct target_sigframe, sf_uc); |
| 46 | regs->pc = ka->_sa_handler; |
| 47 | regs->gpr[xSP] = frame_addr; |
| 48 | regs->gpr[xRA] = TARGET_PS_STRINGS - TARGET_SZSIGCODE; |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * Compare to riscv/riscv/exec_machdep.c sendsig() |
| 54 | * Assumes that the memory is locked if frame points to user memory. |
| 55 | */ |
| 56 | abi_long setup_sigframe_arch(CPURISCVState *env, abi_ulong frame_addr, |
| 57 | struct target_sigframe *frame, int flags) |
| 58 | { |
| 59 | target_mcontext_t *mcp = &frame->sf_uc.uc_mcontext; |
| 60 | |
| 61 | get_mcontext(env, mcp, flags); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | /* |
| 66 | * Compare with get_mcontext() in riscv/riscv/machdep.c |
| 67 | * Assumes that the memory is locked if mcp points to user memory. |
| 68 | */ |
| 69 | abi_long get_mcontext(CPURISCVState *regs, target_mcontext_t *mcp, |
| 70 | int flags) |
| 71 | { |
| 72 | |
| 73 | mcp->mc_gpregs.gp_t[0] = tswap64(regs->gpr[5]); |
| 74 | mcp->mc_gpregs.gp_t[1] = tswap64(regs->gpr[6]); |
| 75 | mcp->mc_gpregs.gp_t[2] = tswap64(regs->gpr[7]); |
| 76 | mcp->mc_gpregs.gp_t[3] = tswap64(regs->gpr[28]); |
| 77 | mcp->mc_gpregs.gp_t[4] = tswap64(regs->gpr[29]); |
| 78 | mcp->mc_gpregs.gp_t[5] = tswap64(regs->gpr[30]); |
| 79 | mcp->mc_gpregs.gp_t[6] = tswap64(regs->gpr[31]); |
| 80 | |
| 81 | mcp->mc_gpregs.gp_s[0] = tswap64(regs->gpr[8]); |
| 82 | mcp->mc_gpregs.gp_s[1] = tswap64(regs->gpr[9]); |
| 83 | mcp->mc_gpregs.gp_s[2] = tswap64(regs->gpr[18]); |
| 84 | mcp->mc_gpregs.gp_s[3] = tswap64(regs->gpr[19]); |
| 85 | mcp->mc_gpregs.gp_s[4] = tswap64(regs->gpr[20]); |
| 86 | mcp->mc_gpregs.gp_s[5] = tswap64(regs->gpr[21]); |
| 87 | mcp->mc_gpregs.gp_s[6] = tswap64(regs->gpr[22]); |
| 88 | mcp->mc_gpregs.gp_s[7] = tswap64(regs->gpr[23]); |
| 89 | mcp->mc_gpregs.gp_s[8] = tswap64(regs->gpr[24]); |
| 90 | mcp->mc_gpregs.gp_s[9] = tswap64(regs->gpr[25]); |
| 91 | mcp->mc_gpregs.gp_s[10] = tswap64(regs->gpr[26]); |
| 92 | mcp->mc_gpregs.gp_s[11] = tswap64(regs->gpr[27]); |
| 93 | |
| 94 | mcp->mc_gpregs.gp_a[0] = tswap64(regs->gpr[10]); |
| 95 | mcp->mc_gpregs.gp_a[1] = tswap64(regs->gpr[11]); |
| 96 | mcp->mc_gpregs.gp_a[2] = tswap64(regs->gpr[12]); |
| 97 | mcp->mc_gpregs.gp_a[3] = tswap64(regs->gpr[13]); |
| 98 | mcp->mc_gpregs.gp_a[4] = tswap64(regs->gpr[14]); |
| 99 | mcp->mc_gpregs.gp_a[5] = tswap64(regs->gpr[15]); |
| 100 | mcp->mc_gpregs.gp_a[6] = tswap64(regs->gpr[16]); |
| 101 | mcp->mc_gpregs.gp_a[7] = tswap64(regs->gpr[17]); |
| 102 | |
| 103 | if (flags & TARGET_MC_GET_CLEAR_RET) { |
| 104 | mcp->mc_gpregs.gp_a[0] = 0; /* a0 */ |
| 105 | mcp->mc_gpregs.gp_a[1] = 0; /* a1 */ |
| 106 | mcp->mc_gpregs.gp_t[0] = 0; /* clear syscall error */ |
| 107 | } |
| 108 | |
| 109 | mcp->mc_gpregs.gp_ra = tswap64(regs->gpr[1]); |
| 110 | mcp->mc_gpregs.gp_sp = tswap64(regs->gpr[2]); |
| 111 | mcp->mc_gpregs.gp_gp = tswap64(regs->gpr[3]); |
| 112 | mcp->mc_gpregs.gp_tp = tswap64(regs->gpr[4]); |
| 113 | mcp->mc_gpregs.gp_sepc = tswap64(regs->pc); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | /* Compare with set_mcontext() in riscv/riscv/exec_machdep.c */ |
| 119 | abi_long set_mcontext(CPURISCVState *regs, target_mcontext_t *mcp, |
| 120 | int srflag) |
| 121 | { |
| 122 | |
| 123 | regs->gpr[5] = tswap64(mcp->mc_gpregs.gp_t[0]); |
| 124 | regs->gpr[6] = tswap64(mcp->mc_gpregs.gp_t[1]); |
| 125 | regs->gpr[7] = tswap64(mcp->mc_gpregs.gp_t[2]); |
| 126 | regs->gpr[28] = tswap64(mcp->mc_gpregs.gp_t[3]); |
| 127 | regs->gpr[29] = tswap64(mcp->mc_gpregs.gp_t[4]); |
| 128 | regs->gpr[30] = tswap64(mcp->mc_gpregs.gp_t[5]); |
| 129 | regs->gpr[31] = tswap64(mcp->mc_gpregs.gp_t[6]); |
| 130 | |
| 131 | regs->gpr[8] = tswap64(mcp->mc_gpregs.gp_s[0]); |
| 132 | regs->gpr[9] = tswap64(mcp->mc_gpregs.gp_s[1]); |
| 133 | regs->gpr[18] = tswap64(mcp->mc_gpregs.gp_s[2]); |
| 134 | regs->gpr[19] = tswap64(mcp->mc_gpregs.gp_s[3]); |
| 135 | regs->gpr[20] = tswap64(mcp->mc_gpregs.gp_s[4]); |
| 136 | regs->gpr[21] = tswap64(mcp->mc_gpregs.gp_s[5]); |
| 137 | regs->gpr[22] = tswap64(mcp->mc_gpregs.gp_s[6]); |
| 138 | regs->gpr[23] = tswap64(mcp->mc_gpregs.gp_s[7]); |
| 139 | regs->gpr[24] = tswap64(mcp->mc_gpregs.gp_s[8]); |
| 140 | regs->gpr[25] = tswap64(mcp->mc_gpregs.gp_s[9]); |
| 141 | regs->gpr[26] = tswap64(mcp->mc_gpregs.gp_s[10]); |
| 142 | regs->gpr[27] = tswap64(mcp->mc_gpregs.gp_s[11]); |
| 143 | |
| 144 | regs->gpr[10] = tswap64(mcp->mc_gpregs.gp_a[0]); |
| 145 | regs->gpr[11] = tswap64(mcp->mc_gpregs.gp_a[1]); |
| 146 | regs->gpr[12] = tswap64(mcp->mc_gpregs.gp_a[2]); |
| 147 | regs->gpr[13] = tswap64(mcp->mc_gpregs.gp_a[3]); |
| 148 | regs->gpr[14] = tswap64(mcp->mc_gpregs.gp_a[4]); |
| 149 | regs->gpr[15] = tswap64(mcp->mc_gpregs.gp_a[5]); |
| 150 | regs->gpr[16] = tswap64(mcp->mc_gpregs.gp_a[6]); |
| 151 | regs->gpr[17] = tswap64(mcp->mc_gpregs.gp_a[7]); |
| 152 | |
| 153 | |
| 154 | regs->gpr[1] = tswap64(mcp->mc_gpregs.gp_ra); |
| 155 | regs->gpr[2] = tswap64(mcp->mc_gpregs.gp_sp); |
| 156 | regs->gpr[3] = tswap64(mcp->mc_gpregs.gp_gp); |
| 157 | regs->gpr[4] = tswap64(mcp->mc_gpregs.gp_tp); |
| 158 | regs->pc = tswap64(mcp->mc_gpregs.gp_sepc); |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | /* Compare with sys_sigreturn() in riscv/riscv/machdep.c */ |
| 164 | abi_long get_ucontext_sigreturn(CPURISCVState *regs, |
| 165 | abi_ulong target_sf, abi_ulong *target_uc) |
| 166 | { |
| 167 | |
| 168 | *target_uc = target_sf; |
| 169 | return 0; |
| 170 | } |