1 /* $NetBSD: core_machdep.c,v 1.5 2019/11/20 19:37:51 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __KERNEL_RCSID(1, "$NetBSD: core_machdep.c,v 1.5 2019/11/20 19:37:51 pgoyette Exp $"); 35 36 #include <sys/types.h> 37 #include <sys/cpu.h> 38 #include <sys/exec.h> 39 #include <sys/core.h> 40 #include <sys/lwp.h> 41 #include <sys/compat_stub.h> 42 43 #include <aarch64/pcb.h> 44 #include <aarch64/frame.h> 45 #include <aarch64/machdep.h> 46 #include <aarch64/armreg.h> 47 48 /* 49 * Write the machine-dependent part of a core dump. 50 */ 51 int 52 cpu_coredump(struct lwp *l, struct coredump_iostate *iocookie, 53 struct core *chdr) 54 { 55 struct coreseg cseg; 56 struct md_coredump md_core; 57 struct pcb * const pcb = lwp_getpcb(l); 58 int error; 59 60 if (iocookie == NULL) { 61 CORE_SETMAGIC(*chdr, COREMAGIC, MID_MACHINE, 0); 62 chdr->c_hdrsize = ALIGN(sizeof(*chdr)); 63 chdr->c_seghdrsize = ALIGN(sizeof(cseg)); 64 chdr->c_cpusize = sizeof(md_core); 65 chdr->c_nseg++; 66 return 0; 67 } 68 69 md_core.reg = l->l_md.md_utf->tf_regs; 70 md_core.reg.r_tpidr = (uint64_t)(uintptr_t)l->l_private; 71 72 fpu_save(l); 73 if (fpu_used_p(l)) { 74 md_core.fpreg = pcb->pcb_fpregs; 75 } else { 76 memset(&md_core.fpreg, 0, sizeof(md_core.fpreg)); 77 } 78 79 CORE_SETMAGIC(cseg, CORESEGMAGIC, MID_MACHINE, CORE_CPU); 80 cseg.c_addr = 0; 81 cseg.c_size = chdr->c_cpusize; 82 83 MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cseg, 84 chdr->c_seghdrsize), ENOSYS, error); 85 if (error) 86 return error; 87 88 MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &md_core, 89 sizeof(md_core)), ENOSYS, error); 90 91 return error; 92 } 93