/* * Copyright (c) 1991, 1992 Paul Kranenburg * Copyright (c) 1993 Branko Lankester * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey * Copyright (c) 1996-1999 Wichert Akkerman * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation * Linux for s390 port by D.J. Barrow * * Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH * port by Greg Banks * Copyright (c) 1999-2018 The strace developers. * * All rights reserved. * * SPDX-License-Identifier: LGPL-2.1-or-later */ #include "defs.h" #ifdef HAVE_ELF_H # include #endif #include "ptrace.h" #include "ptrace_syscall_info.h" #include "regs.h" #include "xlat/nt_descriptor_types.h" #include "xlat/ptrace_cmds.h" #include "xlat/ptrace_setoptions_flags.h" #include "xlat/ptrace_peeksiginfo_flags.h" #define uoff(member) offsetof(struct user, member) #define XLAT_UOFF(member) { uoff(member), "offsetof(struct user, " #member ")" } static const struct xlat struct_user_offsets[] = { #include "userent.h" XLAT_END }; static void print_user_offset_addr(const kernel_ulong_t addr) { bool no_str = false; const struct xlat *x; for (x = struct_user_offsets; x->str; ++x) { if (x->val >= addr) break; } if (!x->str || (x == struct_user_offsets && x->val > addr)) no_str = true; if (no_str || xlat_verbose(xlat_verbosity) != XLAT_STYLE_ABBREV) printaddr(addr); if (no_str || xlat_verbose(xlat_verbosity) == XLAT_STYLE_RAW) return; if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE) tprints(" /* "); if (x->val > addr) { --x; tprintf("%s + %" PRI_klu, x->str, addr - (kernel_ulong_t) x->val); } else { tprints(x->str); } if (xlat_verbose(xlat_verbosity) == XLAT_STYLE_VERBOSE) tprints(" */"); } SYS_FUNC(ptrace) { const kernel_ulong_t request = tcp->u_arg[0]; const int pid = tcp->u_arg[1]; const kernel_ulong_t addr = tcp->u_arg[2]; const kernel_ulong_t data = tcp->u_arg[3]; if (entering(tcp)) { /* request */ printxval64(ptrace_cmds, request, "PTRACE_???"); if (request == PTRACE_TRACEME) { /* pid, addr, and data are ignored. */ return RVAL_DECODED; } /* pid */ tprintf(", %d", pid); /* addr */ switch (request) { case PTRACE_ATTACH: case PTRACE_INTERRUPT: case PTRACE_KILL: case PTRACE_LISTEN: /* addr and data are ignored */ return RVAL_DECODED; case PTRACE_PEEKUSER: case PTRACE_POKEUSER: tprints(", "); print_user_offset_addr(addr); break; case PTRACE_GETREGSET: case PTRACE_SETREGSET: tprints(", "); printxval(nt_descriptor_types, addr, "NT_???"); break; case PTRACE_GETSIGMASK: case PTRACE_SETSIGMASK: case PTRACE_SECCOMP_GET_FILTER: case PTRACE_SECCOMP_GET_METADATA: case PTRACE_GET_SYSCALL_INFO: tprintf(", %" PRI_klu, addr); break; case PTRACE_PEEKSIGINFO: { tprints(", "); struct { uint64_t off; uint32_t flags; uint32_t nr; } psi; if (umove_or_printaddr(tcp, addr, &psi)) { tprints(", "); printaddr(data); return RVAL_DECODED; } tprintf("{off=%" PRIu64 ", flags=", psi.off); printflags(ptrace_peeksiginfo_flags, psi.flags, "PTRACE_PEEKSIGINFO_???"); tprintf(", nr=%u}", psi.nr); break; } default: tprints(", "); printaddr(addr); } # if defined IA64 || defined SPARC || defined SPARC64 switch (request) { # ifdef IA64 case PTRACE_PEEKDATA: case PTRACE_PEEKTEXT: case PTRACE_PEEKUSER: /* data is ignored */ return RVAL_DECODED | RVAL_HEX; # endif /* IA64 */ # if defined SPARC || defined SPARC64 case PTRACE_GETREGS: case PTRACE_SETREGS: case PTRACE_GETFPREGS: case PTRACE_SETFPREGS: /* data is ignored */ return RVAL_DECODED; # endif /* SPARC || SPARC64 */ } # endif /* IA64 || SPARC || SPARC64 */ tprints(", "); /* data */ switch (request) { case PTRACE_CONT: case PTRACE_DETACH: case PTRACE_SYSCALL: #ifdef PTRACE_SINGLESTEP case PTRACE_SINGLESTEP: #endif #ifdef PTRACE_SINGLEBLOCK case PTRACE_SINGLEBLOCK: #endif #ifdef PTRACE_SYSEMU case PTRACE_SYSEMU: #endif #ifdef PTRACE_SYSEMU_SINGLESTEP case PTRACE_SYSEMU_SINGLESTEP: #endif printsignal(data); break; case PTRACE_SEIZE: case PTRACE_SETOPTIONS: #ifdef PTRACE_OLDSETOPTIONS case PTRACE_OLDSETOPTIONS: #endif printflags64(ptrace_setoptions_flags, data, "PTRACE_O_???"); break; case PTRACE_SETSIGINFO: printsiginfo_at(tcp, data); break; case PTRACE_SETSIGMASK: print_sigset_addr_len(tcp, data, addr); break; case PTRACE_SETREGSET: tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR); break; case PTRACE_SECCOMP_GET_METADATA: if (verbose(tcp)) { uint64_t filter_off; if (addr < sizeof(filter_off) || umove(tcp, data, &filter_off)) { printaddr(data); return RVAL_DECODED; } tprintf("{filter_off=%" PRIu64, filter_off); return 0; } printaddr(data); break; #ifndef IA64 case PTRACE_PEEKDATA: case PTRACE_PEEKTEXT: case PTRACE_PEEKUSER: #endif case PTRACE_GETEVENTMSG: case PTRACE_GETREGSET: case PTRACE_GETSIGINFO: case PTRACE_GETSIGMASK: case PTRACE_PEEKSIGINFO: case PTRACE_SECCOMP_GET_FILTER: case PTRACE_GET_SYSCALL_INFO: if (verbose(tcp)) { /* print data on exiting syscall */ return 0; } ATTRIBUTE_FALLTHROUGH; default: printaddr(data); break; } return RVAL_DECODED; } else { switch (request) { #ifndef IA64 case PTRACE_PEEKDATA: case PTRACE_PEEKTEXT: case PTRACE_PEEKUSER: printnum_ptr(tcp, data); break; #endif case PTRACE_GETEVENTMSG: printnum_ulong(tcp, data); break; case PTRACE_GETREGSET: tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR); break; case PTRACE_GETSIGINFO: printsiginfo_at(tcp, data); break; case PTRACE_GETSIGMASK: print_sigset_addr_len(tcp, data, addr); break; case PTRACE_PEEKSIGINFO: print_siginfo_array(tcp, data, tcp->u_rval); break; case PTRACE_SECCOMP_GET_FILTER: print_seccomp_fprog(tcp, data, tcp->u_rval); break; case PTRACE_SECCOMP_GET_METADATA: { const size_t offset = sizeof(uint64_t); uint64_t flags = 0; size_t ret_size = MIN((kernel_ulong_t) tcp->u_rval, offset + sizeof(flags)); if (syserror(tcp) || ret_size <= offset) { tprints("}"); return 0; } if (umoven(tcp, data + offset, ret_size - offset, &flags)) { tprints(", ...}"); return 0; } tprints(", flags="); printflags64(seccomp_filter_flags, flags, "SECCOMP_FILTER_FLAG_???"); if ((kernel_ulong_t) tcp->u_rval > ret_size) tprints(", ..."); tprints("}"); break; } case PTRACE_GET_SYSCALL_INFO: print_ptrace_syscall_info(tcp, data, addr); break; } } return 0; }