Dmitry V. Levin
86d073674e
Provide fallback definitions for PTRACE_GET_SYSCALL_INFO API. Add very basic PTRACE_GET_SYSCALL_INFO support in the parser of ptrace syscall. * ptrace.h: Include <stdint.h>. [!PTRACE_GET_SYSCALL_INFO] (PTRACE_GET_SYSCALL_INFO, PTRACE_SYSCALL_INFO_NONE, PTRACE_SYSCALL_INFO_ENTRY, PTRACE_SYSCALL_INFO_EXIT, PTRACE_SYSCALL_INFO_SECCOMP, struct ptrace_syscall_info): Define. * xlat/ptrace_cmds.in: Add PTRACE_GET_SYSCALL_INFO. * process.c (SYS_FUNC(ptrace)): Handle it.
291 lines
6.6 KiB
C
291 lines
6.6 KiB
C
/*
|
|
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
|
|
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
|
|
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
|
|
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
|
|
* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Linux for s390 port by D.J. Barrow
|
|
* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
|
|
* Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
|
|
* port by Greg Banks <gbanks@pocketpenguins.com>
|
|
* 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 <elf.h>
|
|
#endif
|
|
|
|
#include "ptrace.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:
|
|
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("}");
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|