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
set_sigtramp_args(CPURISCVState * regs,int sig,struct target_sigframe * frame,abi_ulong frame_addr,struct target_sigaction * ka)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 */
setup_sigframe_arch(CPURISCVState * env,abi_ulong frame_addr,struct target_sigframe * frame,int flags)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 */
get_mcontext(CPURISCVState * regs,target_mcontext_t * mcp,int flags)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 */
set_mcontext(CPURISCVState * regs,target_mcontext_t * mcp,int srflag)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 */
get_ucontext_sigreturn(CPURISCVState * regs,abi_ulong target_sf,abi_ulong * target_uc)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 }
171