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1 : : /* Fetch live process registers from TID. C-SKY version. 2 : : Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. 3 : : This file is part of elfutils. 4 : : 5 : : This file is free software; you can redistribute it and/or modify 6 : : it under the terms of either 7 : : 8 : : * the GNU Lesser General Public License as published by the Free 9 : : Software Foundation; either version 3 of the License, or (at 10 : : your option) any later version 11 : : 12 : : or 13 : : 14 : : * the GNU General Public License as published by the Free 15 : : Software Foundation; either version 2 of the License, or (at 16 : : your option) any later version 17 : : 18 : : or both in parallel, as here. 19 : : 20 : : elfutils is distributed in the hope that it will be useful, but 21 : : WITHOUT ANY WARRANTY; without even the implied warranty of 22 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 : : General Public License for more details. 24 : : 25 : : You should have received copies of the GNU General Public License and 26 : : the GNU Lesser General Public License along with this program. If 27 : : not, see <http://www.gnu.org/licenses/>. */ 28 : : 29 : : #ifdef HAVE_CONFIG_H 30 : : # include <config.h> 31 : : #endif 32 : : 33 : : #include "system.h" 34 : : #include <assert.h> 35 : : #if defined __CSKY__ && defined __linux__ 36 : : # include <sys/uio.h> 37 : : # include <sys/procfs.h> 38 : : # include <sys/ptrace.h> 39 : : #endif 40 : : 41 : : #define BACKEND csky_ 42 : : #include "libebl_CPU.h" 43 : : 44 : : bool 45 : 0 : csky_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), 46 : : ebl_tid_registers_t *setfunc __attribute__ ((unused)), 47 : : void *arg __attribute__ ((unused))) 48 : : { 49 : : #if !defined __CSKY__ || !defined __linux__ 50 : 0 : return false; 51 : : #else /* __CSKY__ */ 52 : : struct pt_regs user_regs; 53 : : struct iovec iovec; 54 : : iovec.iov_base = &user_regs; 55 : : iovec.iov_len = sizeof (user_regs); 56 : : if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) 57 : : return false; 58 : : 59 : : Dwarf_Word dwarf_regs[38]; 60 : : 61 : : /* lr. */ 62 : : dwarf_regs[15] = user_regs.lr; 63 : : /* sp. */ 64 : : dwarf_regs[14] = user_regs.usp; 65 : : /* r0 ~ r13. */ 66 : : dwarf_regs[0] = user_regs.a0; 67 : : dwarf_regs[1] = user_regs.a1; 68 : : dwarf_regs[2] = user_regs.a2; 69 : : dwarf_regs[3] = user_regs.a3; 70 : : for (int i = 4; i < 14; i++) 71 : : dwarf_regs[i] = user_regs.regs[i - 4]; 72 : : /* r ~ r13. */ 73 : : for (int i = 16; i < 31; i++) 74 : : dwarf_regs[i] = user_regs.exregs[i - 16]; 75 : : /* tls. */ 76 : : dwarf_regs[31] = user_regs.tls; 77 : : /* hi. */ 78 : : dwarf_regs[36] = user_regs.rhi; 79 : : /* lo. */ 80 : : dwarf_regs[37] = user_regs.rlo; 81 : : /* pc. */ 82 : : dwarf_regs[32] = user_regs.pc; 83 : : setfunc (-1, 1, &dwarf_regs[32], arg); 84 : : 85 : : return setfunc (0, 38, dwarf_regs, arg); 86 : : #endif 87 : : }