aboutsummaryrefslogtreecommitdiff
path: root/REORG.TODO/elf/sotruss-lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'REORG.TODO/elf/sotruss-lib.c')
-rw-r--r--REORG.TODO/elf/sotruss-lib.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/REORG.TODO/elf/sotruss-lib.c b/REORG.TODO/elf/sotruss-lib.c
new file mode 100644
index 0000000000..da2fedd52a
--- /dev/null
+++ b/REORG.TODO/elf/sotruss-lib.c
@@ -0,0 +1,386 @@
+/* Trace calls through PLTs and show caller, callee, and parameters.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <error.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+#include <sys/uio.h>
+
+#include <ldsodefs.h>
+
+
+extern const char *__progname;
+extern const char *__progname_full;
+
+
+/* List of objects to trace calls from. */
+static const char *fromlist;
+/* List of objects to trace calls to. */
+static const char *tolist;
+
+/* If non-zero, also trace returns of the calls. */
+static int do_exit;
+/* If non-zero print PID for each line. */
+static int print_pid;
+
+/* The output stream to use. */
+static FILE *out_file;
+
+
+static int
+match_pid (pid_t pid, const char *which)
+{
+ if (which == NULL || which[0] == '\0')
+ {
+ print_pid = 1;
+ return 1;
+ }
+
+ char *endp;
+ unsigned long n = strtoul (which, &endp, 0);
+ return *endp == '\0' && n == pid;
+}
+
+
+static void
+init (void)
+{
+ fromlist = getenv ("SOTRUSS_FROMLIST");
+ if (fromlist != NULL && fromlist[0] == '\0')
+ fromlist = NULL;
+ tolist = getenv ("SOTRUSS_TOLIST");
+ if (tolist != NULL && tolist[0] == '\0')
+ tolist = NULL;
+ do_exit = (getenv ("SOTRUSS_EXIT") ?: "")[0] != '\0';
+
+ /* Determine whether this process is supposed to be traced and if
+ yes, whether we should print into a file. */
+ const char *which_process = getenv ("SOTRUSS_WHICH");
+ pid_t pid = getpid ();
+ int out_fd = -1;
+ if (match_pid (pid, which_process))
+ {
+ const char *out_filename = getenv ("SOTRUSS_OUTNAME");
+
+ if (out_filename != NULL && out_filename[0] != 0)
+ {
+ size_t out_filename_len = strlen (out_filename) + 13;
+ char fullname[out_filename_len];
+ char *endp = stpcpy (fullname, out_filename);
+ if (which_process == NULL || which_process[0] == '\0')
+ snprintf (endp, 13, ".%ld", (long int) pid);
+
+ out_fd = open (fullname, O_RDWR | O_CREAT | O_TRUNC, 0666);
+ if (out_fd != -1)
+ print_pid = 0;
+ }
+ }
+
+ /* If we do not write into a file write to stderr. Duplicate the
+ descriptor so that we can keep printing in case the program
+ closes stderr. Try first to allocate a descriptor with a value
+ usually not used as to minimize interference with the
+ program. */
+ if (out_fd == -1)
+ {
+ out_fd = fcntl (STDERR_FILENO, F_DUPFD, 1000);
+ if (out_fd == -1)
+ out_fd = dup (STDERR_FILENO);
+ }
+
+ if (out_fd != -1)
+ {
+ /* Convert file descriptor into a stream. */
+ out_file = fdopen (out_fd, "w");
+ if (out_file != NULL)
+ setlinebuf (out_file);
+ }
+}
+
+
+/* Audit interface verification. We also initialize everything if
+ everything checks out OK. */
+unsigned int
+la_version (unsigned int v)
+{
+ if (v != LAV_CURRENT)
+ error (1, 0, "cannot handle interface version %u", v);
+
+ init ();
+
+ return v;
+}
+
+
+/* Check whether a file name is on the colon-separated list of file
+ names. */
+static unsigned int
+match_file (const char *list, const char *name, size_t name_len,
+ unsigned int mask)
+{
+ if (list[0] == '\0')
+ return 0;
+
+ const char *cp = list;
+ while (1)
+ {
+ if (strncmp (cp, name, name_len) == 0
+ && (cp[name_len] == ':' || cp[name_len] == '\0'))
+ return mask;
+
+ cp = strchr (cp, ':');
+ if (cp == NULL)
+ return 0;
+ ++cp;
+ }
+}
+
+
+unsigned int
+la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
+{
+ if (out_file == NULL)
+ return 0;
+
+ const char *full_name = map->l_name ?: "";
+ if (full_name[0] == '\0')
+ full_name = __progname_full;
+ size_t full_name_len = strlen (full_name);
+ const char *base_name = basename (full_name);
+ if (base_name[0] == '\0')
+ base_name = __progname;
+ size_t base_name_len = strlen (base_name);
+
+ int result = 0;
+ const char *print_name = NULL;
+ for (struct libname_list *l = map->l_libname; l != NULL; l = l->next)
+ {
+ if (print_name == NULL || (print_name[0] == '/' && l->name[0] != '/'))
+ print_name = l->name;
+
+ if (fromlist != NULL)
+ result |= match_file (fromlist, l->name, strlen (l->name),
+ LA_FLG_BINDFROM);
+
+ if (tolist != NULL)
+ result |= match_file (tolist, l->name, strlen (l->name),LA_FLG_BINDTO);
+ }
+
+ if (print_name == NULL)
+ print_name = base_name;
+ if (print_name[0] == '\0')
+ print_name = __progname;
+
+ /* We cannot easily get to the object name in the PLT handling
+ functions. Use the cookie to get the string pointer passed back
+ to us. */
+ *cookie = (uintptr_t) print_name;
+
+ /* The object name has to be on the list of objects to trace calls
+ from or that list must be empty. In the latter case we trace
+ only calls from the main binary. */
+ if (fromlist == NULL)
+ result |= map->l_name[0] == '\0' ? LA_FLG_BINDFROM : 0;
+ else
+ result |= (match_file (fromlist, full_name, full_name_len,
+ LA_FLG_BINDFROM)
+ | match_file (fromlist, base_name, base_name_len,
+ LA_FLG_BINDFROM));
+
+ /* The object name has to be on the list of objects to trace calls
+ to or that list must be empty. In the latter case we trace
+ calls toall objects. */
+ if (tolist == NULL)
+ result |= LA_FLG_BINDTO;
+ else
+ result |= (match_file (tolist, full_name, full_name_len, LA_FLG_BINDTO)
+ | match_file (tolist, base_name, base_name_len, LA_FLG_BINDTO));
+
+ return result;
+}
+
+
+#if __ELF_NATIVE_CLASS == 32
+# define la_symbind la_symbind32
+typedef Elf32_Sym Elf_Sym;
+#else
+# define la_symbind la_symbind64
+typedef Elf64_Sym Elf_Sym;
+#endif
+
+uintptr_t
+la_symbind (Elf_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+ uintptr_t *defcook, unsigned int *flags, const char *symname)
+{
+ if (!do_exit)
+ *flags = LA_SYMB_NOPLTEXIT;
+
+ return sym->st_value;
+}
+
+
+static void
+print_enter (uintptr_t *refcook, uintptr_t *defcook, const char *symname,
+ unsigned long int reg1, unsigned long int reg2,
+ unsigned long int reg3, unsigned int flags)
+{
+ char buf[3 * sizeof (pid_t) + 3];
+ buf[0] = '\0';
+ if (print_pid)
+ snprintf (buf, sizeof (buf), "%5ld: ", (long int) getpid ());
+
+ fprintf (out_file, "%s%15s -> %-15s:%s%s(0x%lx, 0x%lx, 0x%lx)\n",
+ buf, (char *) *refcook, (char *) *defcook,
+ (flags & LA_SYMB_NOPLTEXIT) ? "*" : " ", symname, reg1, reg2, reg3);
+}
+
+
+#ifdef __i386__
+Elf32_Addr
+la_i86_gnu_pltenter (Elf32_Sym *sym __attribute__ ((unused)),
+ unsigned int ndx __attribute__ ((unused)),
+ uintptr_t *refcook, uintptr_t *defcook,
+ La_i86_regs *regs, unsigned int *flags,
+ const char *symname, long int *framesizep)
+{
+ unsigned long int *sp = (unsigned long int *) regs->lr_esp;
+
+ print_enter (refcook, defcook, symname, sp[1], sp[2], sp[3], *flags);
+
+ /* No need to copy anything, we will not need the parameters in any case. */
+ *framesizep = 0;
+
+ return sym->st_value;
+}
+#elif defined __x86_64__
+Elf64_Addr
+la_x86_64_gnu_pltenter (Elf64_Sym *sym __attribute__ ((unused)),
+ unsigned int ndx __attribute__ ((unused)),
+ uintptr_t *refcook, uintptr_t *defcook,
+ La_x86_64_regs *regs, unsigned int *flags,
+ const char *symname, long int *framesizep)
+{
+ print_enter (refcook, defcook, symname,
+ regs->lr_rdi, regs->lr_rsi, regs->lr_rdx, *flags);
+
+ /* No need to copy anything, we will not need the parameters in any case. */
+ *framesizep = 0;
+
+ return sym->st_value;
+}
+#elif defined __sparc__ && !defined __arch64__
+Elf32_Addr
+la_sparc32_gnu_pltenter (Elf32_Sym *sym __attribute__ ((unused)),
+ unsigned int ndx __attribute__ ((unused)),
+ uintptr_t *refcook, uintptr_t *defcook,
+ La_sparc32_regs *regs, unsigned int *flags,
+ const char *symname, long int *framesizep)
+{
+ print_enter (refcook, defcook, symname,
+ regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2],
+ *flags);
+
+ /* No need to copy anything, we will not need the parameters in any case. */
+ *framesizep = 0;
+
+ return sym->st_value;
+}
+#elif defined __sparc__ && defined __arch64__
+Elf64_Addr
+la_sparc64_gnu_pltenter (Elf64_Sym *sym __attribute__ ((unused)),
+ unsigned int ndx __attribute__ ((unused)),
+ uintptr_t *refcook, uintptr_t *defcook,
+ La_sparc64_regs *regs, unsigned int *flags,
+ const char *symname, long int *framesizep)
+{
+ print_enter (refcook, defcook, symname,
+ regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2],
+ *flags);
+
+ /* No need to copy anything, we will not need the parameters in any case. */
+ *framesizep = 0;
+
+ return sym->st_value;
+}
+#elif !defined HAVE_ARCH_PLTENTER
+# warning "pltenter for architecture not supported"
+#endif
+
+
+static void
+print_exit (uintptr_t *refcook, uintptr_t *defcook, const char *symname,
+ unsigned long int reg)
+{
+ char buf[3 * sizeof (pid_t) + 3];
+ buf[0] = '\0';
+ if (print_pid)
+ snprintf (buf, sizeof (buf), "%5ld: ", (long int) getpid ());
+
+ fprintf (out_file, "%s%15s -> %-15s:%s%s - 0x%lx\n",
+ buf, (char *) *refcook, (char *) *defcook, " ", symname, reg);
+}
+
+
+#ifdef __i386__
+unsigned int
+la_i86_gnu_pltexit (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+ uintptr_t *defcook, const struct La_i86_regs *inregs,
+ struct La_i86_retval *outregs, const char *symname)
+{
+ print_exit (refcook, defcook, symname, outregs->lrv_eax);
+
+ return 0;
+}
+#elif defined __x86_64__
+unsigned int
+la_x86_64_gnu_pltexit (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+ uintptr_t *defcook, const struct La_x86_64_regs *inregs,
+ struct La_x86_64_retval *outregs, const char *symname)
+{
+ print_exit (refcook, defcook, symname, outregs->lrv_rax);
+
+ return 0;
+}
+#elif defined __sparc__ && !defined __arch64__
+unsigned int
+la_sparc32_gnu_pltexit (Elf32_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+ uintptr_t *defcook, const struct La_sparc32_regs *inregs,
+ struct La_sparc32_retval *outregs, const char *symname)
+{
+ print_exit (refcook, defcook, symname, outregs->lrv_reg[0]);
+
+ return 0;
+}
+#elif defined __sparc__ && defined __arch64__
+unsigned int
+la_sparc64_gnu_pltexit (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
+ uintptr_t *defcook, const struct La_sparc64_regs *inregs,
+ struct La_sparc64_retval *outregs, const char *symname)
+{
+ print_exit (refcook, defcook, symname, outregs->lrv_reg[0]);
+
+ return 0;
+}
+#elif !defined HAVE_ARCH_PLTEXIT
+# warning "pltexit for architecture not supported"
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 00:44:04 +0000