From c5a6cee743483f789fb6d8c160ec0840cbddb574 Mon Sep 17 00:00:00 2001 From: gonzoj Date: Sat, 20 Mar 2010 20:06:08 +0000 Subject: [PATCH] initial commit --- .dep/elf_utils.d | 66 +++++ .dep/proc_utils.d | 48 ++++ .dep/ptrace_utils.d | 60 +++++ .dep/stubs.d | 2 + .dep/surgeon.d | 70 ++++++ COPYING | 675 ++++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 57 +++++ README | 54 +++++ elf_utils.c | 419 ++++++++++++++++++++++++++++++++ elf_utils.h | 62 +++++ inject.sh | 9 + proc_utils.c | 252 ++++++++++++++++++++ proc_utils.h | 43 ++++ ptrace_utils.c | 101 ++++++++ ptrace_utils.h | 40 ++++ stubs.S | 53 +++++ stubs.h | 39 +++ surgeon.c | 646 +++++++++++++++++++++++++++++++++++++++++++++++++ types.h | 23 ++ unload.sh | 9 + 20 files changed, 2728 insertions(+) create mode 100644 .dep/elf_utils.d create mode 100644 .dep/proc_utils.d create mode 100644 .dep/ptrace_utils.d create mode 100644 .dep/stubs.d create mode 100644 .dep/surgeon.d create mode 100644 COPYING create mode 100644 Makefile create mode 100644 README create mode 100644 elf_utils.c create mode 100644 elf_utils.h create mode 100755 inject.sh create mode 100644 proc_utils.c create mode 100644 proc_utils.h create mode 100644 ptrace_utils.c create mode 100644 ptrace_utils.h create mode 100644 stubs.S create mode 100644 stubs.h create mode 100644 surgeon.c create mode 100644 types.h create mode 100755 unload.sh diff --git a/.dep/elf_utils.d b/.dep/elf_utils.d new file mode 100644 index 0000000..a50d3c5 --- /dev/null +++ b/.dep/elf_utils.d @@ -0,0 +1,66 @@ +elf_utils.o: elf_utils.c /usr/include/errno.h /usr/include/features.h \ + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \ + /usr/include/bits/errno.h /usr/include/linux/errno.h \ + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h \ + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \ + /usr/include/stdio.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h \ + /usr/include/bits/types.h /usr/include/bits/wordsize.h \ + /usr/include/bits/typesizes.h /usr/include/libio.h \ + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h \ + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h \ + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h \ + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h \ + /usr/include/endian.h /usr/include/bits/endian.h \ + /usr/include/sys/select.h /usr/include/bits/select.h \ + /usr/include/bits/sigset.h /usr/include/bits/time.h \ + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h \ + /usr/include/bits/sched.h /usr/include/alloca.h \ + /usr/include/sys/ptrace.h /usr/include/unistd.h \ + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h \ + /usr/include/getopt.h elf_utils.h /usr/include/linux/elf.h \ + /usr/include/linux/types.h /usr/include/linux/posix_types.h \ + /usr/include/linux/stddef.h /usr/include/linux/compiler.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/asm/posix_types.h \ + /usr/include/asm/posix_types.h /usr/include/asm-i486/posix_types.h \ + /usr/include/asm/types.h /usr/include/asm-i486/types.h \ + /usr/include/linux/auxvec.h /usr/include/asm/auxvec.h \ + /usr/include/asm-i486/auxvec.h /usr/include/linux/elf-em.h \ + /usr/include/asm/elf.h /usr/include/asm-i486/elf.h \ + /usr/include/asm/ptrace.h /usr/include/asm-i486/ptrace.h \ + /usr/include/asm/user.h /usr/include/asm-i486/user.h \ + /usr/include/asm/page.h /usr/include/asm-i486/page.h \ + /usr/include/linux/utsname.h /usr/include/string.h types.h \ + ptrace_utils.h +elf_utils.c /usr/include/errno.h /usr/include/features.h: + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h: + /usr/include/bits/errno.h /usr/include/linux/errno.h: + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h: + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h: + /usr/include/stdio.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h: + /usr/include/bits/types.h /usr/include/bits/wordsize.h: + /usr/include/bits/typesizes.h /usr/include/libio.h: + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h: + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h: + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h: + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h: + /usr/include/endian.h /usr/include/bits/endian.h: + /usr/include/sys/select.h /usr/include/bits/select.h: + /usr/include/bits/sigset.h /usr/include/bits/time.h: + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h: + /usr/include/bits/sched.h /usr/include/alloca.h: + /usr/include/sys/ptrace.h /usr/include/unistd.h: + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h: + /usr/include/getopt.h elf_utils.h /usr/include/linux/elf.h: + /usr/include/linux/types.h /usr/include/linux/posix_types.h: + /usr/include/linux/stddef.h /usr/include/linux/compiler.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/asm/posix_types.h: + /usr/include/asm/posix_types.h /usr/include/asm-i486/posix_types.h: + /usr/include/asm/types.h /usr/include/asm-i486/types.h: + /usr/include/linux/auxvec.h /usr/include/asm/auxvec.h: + /usr/include/asm-i486/auxvec.h /usr/include/linux/elf-em.h: + /usr/include/asm/elf.h /usr/include/asm-i486/elf.h: + /usr/include/asm/ptrace.h /usr/include/asm-i486/ptrace.h: + /usr/include/asm/user.h /usr/include/asm-i486/user.h: + /usr/include/asm/page.h /usr/include/asm-i486/page.h: + /usr/include/linux/utsname.h /usr/include/string.h types.h: + ptrace_utils.h: diff --git a/.dep/proc_utils.d b/.dep/proc_utils.d new file mode 100644 index 0000000..d9a180d --- /dev/null +++ b/.dep/proc_utils.d @@ -0,0 +1,48 @@ +proc_utils.o: proc_utils.c /usr/include/errno.h /usr/include/features.h \ + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \ + /usr/include/bits/errno.h /usr/include/linux/errno.h \ + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h \ + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/limits.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/syslimits.h \ + /usr/include/limits.h /usr/include/bits/posix1_lim.h \ + /usr/include/bits/local_lim.h /usr/include/linux/limits.h \ + /usr/include/bits/posix2_lim.h /usr/include/stdio.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h \ + /usr/include/bits/types.h /usr/include/bits/wordsize.h \ + /usr/include/bits/typesizes.h /usr/include/libio.h \ + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h \ + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h \ + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h \ + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h \ + /usr/include/endian.h /usr/include/bits/endian.h \ + /usr/include/sys/select.h /usr/include/bits/select.h \ + /usr/include/bits/sigset.h /usr/include/bits/time.h \ + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h \ + /usr/include/bits/sched.h /usr/include/alloca.h /usr/include/string.h \ + /usr/include/unistd.h /usr/include/bits/posix_opt.h \ + /usr/include/bits/confname.h /usr/include/getopt.h proc_utils.h types.h +proc_utils.c /usr/include/errno.h /usr/include/features.h: + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h: + /usr/include/bits/errno.h /usr/include/linux/errno.h: + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h: + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/limits.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/syslimits.h: + /usr/include/limits.h /usr/include/bits/posix1_lim.h: + /usr/include/bits/local_lim.h /usr/include/linux/limits.h: + /usr/include/bits/posix2_lim.h /usr/include/stdio.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h: + /usr/include/bits/types.h /usr/include/bits/wordsize.h: + /usr/include/bits/typesizes.h /usr/include/libio.h: + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h: + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h: + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h: + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h: + /usr/include/endian.h /usr/include/bits/endian.h: + /usr/include/sys/select.h /usr/include/bits/select.h: + /usr/include/bits/sigset.h /usr/include/bits/time.h: + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h: + /usr/include/bits/sched.h /usr/include/alloca.h /usr/include/string.h: + /usr/include/unistd.h /usr/include/bits/posix_opt.h: + /usr/include/bits/confname.h /usr/include/getopt.h proc_utils.h types.h: diff --git a/.dep/ptrace_utils.d b/.dep/ptrace_utils.d new file mode 100644 index 0000000..ed0dda4 --- /dev/null +++ b/.dep/ptrace_utils.d @@ -0,0 +1,60 @@ +ptrace_utils.o: ptrace_utils.c /usr/include/errno.h \ + /usr/include/features.h /usr/include/sys/cdefs.h \ + /usr/include/gnu/stubs.h /usr/include/bits/errno.h \ + /usr/include/linux/errno.h /usr/include/asm/errno.h \ + /usr/include/asm-i486/errno.h /usr/include/asm-generic/errno.h \ + /usr/include/asm-generic/errno-base.h /usr/include/stdio.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h \ + /usr/include/bits/types.h /usr/include/bits/wordsize.h \ + /usr/include/bits/typesizes.h /usr/include/libio.h \ + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h \ + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h \ + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h \ + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h \ + /usr/include/endian.h /usr/include/bits/endian.h \ + /usr/include/sys/select.h /usr/include/bits/select.h \ + /usr/include/bits/sigset.h /usr/include/bits/time.h \ + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h \ + /usr/include/bits/sched.h /usr/include/alloca.h /usr/include/string.h \ + /usr/include/sys/ptrace.h /usr/include/sys/wait.h /usr/include/signal.h \ + /usr/include/bits/signum.h /usr/include/bits/siginfo.h \ + /usr/include/bits/sigaction.h /usr/include/bits/sigcontext.h \ + /usr/include/asm/sigcontext.h /usr/include/asm-i486/sigcontext.h \ + /usr/include/linux/compiler.h /usr/include/bits/sigstack.h \ + /usr/include/bits/sigthread.h /usr/include/sys/resource.h \ + /usr/include/bits/resource.h /usr/include/bits/waitflags.h \ + /usr/include/bits/waitstatus.h ptrace_utils.h \ + /usr/include/asm-i486/user.h /usr/include/asm/page.h \ + /usr/include/asm-i486/page.h /usr/include/unistd.h \ + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h \ + /usr/include/getopt.h types.h +ptrace_utils.c /usr/include/errno.h: + /usr/include/features.h /usr/include/sys/cdefs.h: + /usr/include/gnu/stubs.h /usr/include/bits/errno.h: + /usr/include/linux/errno.h /usr/include/asm/errno.h: + /usr/include/asm-i486/errno.h /usr/include/asm-generic/errno.h: + /usr/include/asm-generic/errno-base.h /usr/include/stdio.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h: + /usr/include/bits/types.h /usr/include/bits/wordsize.h: + /usr/include/bits/typesizes.h /usr/include/libio.h: + /usr/include/_G_config.h /usr/include/wchar.h /usr/include/bits/wchar.h: + /usr/include/gconv.h /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h: + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h: + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h: + /usr/include/endian.h /usr/include/bits/endian.h: + /usr/include/sys/select.h /usr/include/bits/select.h: + /usr/include/bits/sigset.h /usr/include/bits/time.h: + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h: + /usr/include/bits/sched.h /usr/include/alloca.h /usr/include/string.h: + /usr/include/sys/ptrace.h /usr/include/sys/wait.h /usr/include/signal.h: + /usr/include/bits/signum.h /usr/include/bits/siginfo.h: + /usr/include/bits/sigaction.h /usr/include/bits/sigcontext.h: + /usr/include/asm/sigcontext.h /usr/include/asm-i486/sigcontext.h: + /usr/include/linux/compiler.h /usr/include/bits/sigstack.h: + /usr/include/bits/sigthread.h /usr/include/sys/resource.h: + /usr/include/bits/resource.h /usr/include/bits/waitflags.h: + /usr/include/bits/waitstatus.h ptrace_utils.h: + /usr/include/asm-i486/user.h /usr/include/asm/page.h: + /usr/include/asm-i486/page.h /usr/include/unistd.h: + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h: + /usr/include/getopt.h types.h: diff --git a/.dep/stubs.d b/.dep/stubs.d new file mode 100644 index 0000000..9e5cdb9 --- /dev/null +++ b/.dep/stubs.d @@ -0,0 +1,2 @@ +stubs.o: stubs.S +stubs.S: diff --git a/.dep/surgeon.d b/.dep/surgeon.d new file mode 100644 index 0000000..18e196f --- /dev/null +++ b/.dep/surgeon.d @@ -0,0 +1,70 @@ +surgeon.o: surgeon.c /usr/include/dlfcn.h /usr/include/features.h \ + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h \ + /usr/include/bits/dlfcn.h /usr/include/errno.h \ + /usr/include/bits/errno.h /usr/include/linux/errno.h \ + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h \ + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \ + /usr/include/getopt.h /usr/include/stdio.h /usr/include/bits/types.h \ + /usr/include/bits/wordsize.h /usr/include/bits/typesizes.h \ + /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h \ + /usr/include/bits/wchar.h /usr/include/gconv.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h \ + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h \ + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h \ + /usr/include/endian.h /usr/include/bits/endian.h \ + /usr/include/sys/select.h /usr/include/bits/select.h \ + /usr/include/bits/sigset.h /usr/include/bits/time.h \ + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h \ + /usr/include/bits/sched.h /usr/include/alloca.h \ + /usr/include/sys/ptrace.h /usr/include/unistd.h \ + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h elf_utils.h \ + /usr/include/linux/elf.h /usr/include/linux/types.h \ + /usr/include/linux/posix_types.h /usr/include/linux/stddef.h \ + /usr/include/linux/compiler.h \ + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/asm/posix_types.h \ + /usr/include/asm/posix_types.h /usr/include/asm-i486/posix_types.h \ + /usr/include/asm/types.h /usr/include/asm-i486/types.h \ + /usr/include/linux/auxvec.h /usr/include/asm/auxvec.h \ + /usr/include/asm-i486/auxvec.h /usr/include/linux/elf-em.h \ + /usr/include/asm/elf.h /usr/include/asm-i486/elf.h \ + /usr/include/asm/ptrace.h /usr/include/asm-i486/ptrace.h \ + /usr/include/asm/user.h /usr/include/asm-i486/user.h \ + /usr/include/asm/page.h /usr/include/asm-i486/page.h \ + /usr/include/linux/utsname.h /usr/include/string.h types.h proc_utils.h \ + ptrace_utils.h stubs.h +surgeon.c /usr/include/dlfcn.h /usr/include/features.h: + /usr/include/sys/cdefs.h /usr/include/gnu/stubs.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stddef.h: + /usr/include/bits/dlfcn.h /usr/include/errno.h: + /usr/include/bits/errno.h /usr/include/linux/errno.h: + /usr/include/asm/errno.h /usr/include/asm-i486/errno.h: + /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h: + /usr/include/getopt.h /usr/include/stdio.h /usr/include/bits/types.h: + /usr/include/bits/wordsize.h /usr/include/bits/typesizes.h: + /usr/include/libio.h /usr/include/_G_config.h /usr/include/wchar.h: + /usr/include/bits/wchar.h /usr/include/gconv.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/stdarg.h: + /usr/include/bits/stdio_lim.h /usr/include/bits/sys_errlist.h: + /usr/include/stdlib.h /usr/include/sys/types.h /usr/include/time.h: + /usr/include/endian.h /usr/include/bits/endian.h: + /usr/include/sys/select.h /usr/include/bits/select.h: + /usr/include/bits/sigset.h /usr/include/bits/time.h: + /usr/include/sys/sysmacros.h /usr/include/bits/pthreadtypes.h: + /usr/include/bits/sched.h /usr/include/alloca.h: + /usr/include/sys/ptrace.h /usr/include/unistd.h: + /usr/include/bits/posix_opt.h /usr/include/bits/confname.h elf_utils.h: + /usr/include/linux/elf.h /usr/include/linux/types.h: + /usr/include/linux/posix_types.h /usr/include/linux/stddef.h: + /usr/include/linux/compiler.h: + /usr/lib/gcc/i486-linux-gnu/4.1.2/include/asm/posix_types.h: + /usr/include/asm/posix_types.h /usr/include/asm-i486/posix_types.h: + /usr/include/asm/types.h /usr/include/asm-i486/types.h: + /usr/include/linux/auxvec.h /usr/include/asm/auxvec.h: + /usr/include/asm-i486/auxvec.h /usr/include/linux/elf-em.h: + /usr/include/asm/elf.h /usr/include/asm-i486/elf.h: + /usr/include/asm/ptrace.h /usr/include/asm-i486/ptrace.h: + /usr/include/asm/user.h /usr/include/asm-i486/user.h: + /usr/include/asm/page.h /usr/include/asm-i486/page.h: + /usr/include/linux/utsname.h /usr/include/string.h types.h proc_utils.h: + ptrace_utils.h stubs.h: diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..a737dcf --- /dev/null +++ b/COPYING @@ -0,0 +1,675 @@ + + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..83e39ff --- /dev/null +++ b/Makefile @@ -0,0 +1,57 @@ +CC = gcc + +CFLAGS = -Wall -m32 + +MAKEDEPEND = -MD + +DEPDIR = .dep + +CSRC := $(wildcard *.c) + +ASMSRC := $(wildcard *.S) + +OBJ = $(CSRC:%.c=%.o) $(ASMSRC:%.S=%.o) + +EXE = surgeon + +INSTALLPATH = /usr/bin + +PROCESSDEP = @cp $*.d $(DEPDIR)/$*.d; \ + sed -e 's/\#.*//' -e 's/^[^:]*: *//' -e 's/ * \\$$//' -e '/^$$/ d' -e 's/$$/:/' < $*.d >> $(DEPDIR)/$*.d; \ + rm -f $*.d; + +.PHONY: build +build: $(OBJ) + $(CC) $(CFLAGS) -o $(EXE) $(OBJ) + @echo + @echo "*** BUILD COMPLETE ***" + +.PHONY: debug +debug: CFLAGS += -g +debug: $(OBJ) + $(CC) $(CFLAGS) -o $(EXE) $(OBJ) + @echo + @echo "*** DEBUG BUILD COMPLETE ***" + +%.o: %.c + $(CC) -c $(CFLAGS) $(MAKEDEPEND) -o $@ $< + $(PROCESSDEP) + +%.o: %.S + $(CC) -c $(CFLAGS) $(MAKEDEPEND) -o $@ $< + $(PROCESSDEP) + +-include $(CSRC:%.c=$(DEPDIR)/%.d) $(ASMSRC:%.S=$(DEPDIR)/%.d) + +.PHONY: install +install: + cp $(EXE) $(INSTALLPATH) + +.PHONY: remove +remove: + rm -f $(INSTALLPATH)/$(EXE) + +.PHONY: clean +clean: + rm -f $(OBJ) $(EXE) + diff --git a/README b/README new file mode 100644 index 0000000..d09f021 --- /dev/null +++ b/README @@ -0,0 +1,54 @@ +surgeon v 0.2 by gonzoj + + +Installation: +------------- + +Since this is a complete rewrite of my old injector, I'll recommend the debug +build. If it's crashing, you know why / where at least (theoretically). + +Anyway, to build choose between the standard and the debug build. For the +former run: + +$ make + +For the latter run: + +$ make debug + +And eventually install: + +$ make install + +If you got tired of injecting, type: + +$ make remove + + +Usage: +------ + +Injecting a shared object OBJECT into a running process PID with surgeon is +easy: + +$ surgeon [-i] PID OBJECT + +To unload a shared object from a process, use the toggle -u: + +$ surgeon [-u] PID OBJECT + +In order to work properly, surgeon needs some (internal) libc functions. +Although it has built-in several ways to resolve those functions, it may occur +that the injection fails. In such a situation it can be useful, to set the +location of libc as well as the offsets for those function manually. The +options which allow that are --libc, --malloc, --free, --dlopen and --dlclose. +To obtain offsets manually, you could use readelf, for example. Run surgeon -h +to learn more. + + +Note: +----- + +This release contains as well two simple shell scripts, which inject / unload +snoogans into Diablo II. I won't bother to explain how to use them, I think it +should be clear enough. diff --git a/elf_utils.c b/elf_utils.c new file mode 100644 index 0000000..08cf9f6 --- /dev/null +++ b/elf_utils.c @@ -0,0 +1,419 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include + +#include "elf_utils.h" +#include "ptrace_utils.h" + +int +elf_is_valid(vaddr_t addr) +{ + char *word = (char *) ptrace_read(addr, sizeof(long)); + if (word == NULL) + { + return 0; + } + return (word[EI_MAG0] == ELFMAG0 && word[EI_MAG1] == ELFMAG1 && word[EI_MAG2] + == ELFMAG2 && word[EI_MAG3] == ELFMAG3) ? 1 : 0; +} + +int +elf_read(vaddr_t addr, void *elf_struct, size_t size) +{ + long *data = ptrace_read(addr, size); + if (data) + { + memcpy(elf_struct, (void *) data, size); + return 1; + } + return 0; +} + +char * +elf_read_string(vaddr_t addr) +{ + static char *str = NULL; + + if (str) + { + free(str); + str = NULL; + } + + int i = 0; + do + { + if ((i % 512) == 0) + { + str = (char *) realloc(str, i + 512); + if (str == NULL) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + } + + long *word = ptrace_read(addr + i, sizeof(long)); + if (word == NULL) + { + return NULL; + } + memcpy(str + i, word, sizeof(long)); + } + while (str[i++] != '\0' && str[i++] != '\0' && str[i++] != '\0' && str[i++] + != '\0'); + + return str; +} + +void +elf_dump_ehdr(Elf32_Ehdr ehdr) +{ + printf("-----------------------------------------------------\n"); + printf("ELF header: (magic sequence %lX %lX %lX %lX)\n", + (long unsigned) ehdr.e_ident[EI_MAG0], + (long unsigned) ehdr.e_ident[EI_MAG1], + (long unsigned) ehdr.e_ident[EI_MAG2], + (long unsigned) ehdr.e_ident[EI_MAG3]); + printf(" class: "); + switch (ehdr.e_ident[EI_CLASS]) + { + case ELFCLASSNONE: + printf("invalid\n"); + break; + case ELFCLASS32: + printf("ELF32\n"); + break; + case ELFCLASS64: + printf("ELF64\n"); + break; + default: + printf("\n"); + break; + } + printf(" data: "); + switch (ehdr.e_ident[EI_DATA]) + { + case ELFDATANONE: + printf("invalid\n"); + break; + case ELFDATA2LSB: + printf("2's complement (LSB)\n"); + break; + case ELFDATA2MSB: + printf("2's complement (MSB)\n"); + break; + default: + printf("\n"); + break; + } + printf(" version: %i\n", ehdr.e_ident[EI_VERSION]); + printf("\n"); + printf(" type: "); + switch (ehdr.e_type) + { + case ET_NONE: + printf("invalid\n"); + break; + case ET_REL: + printf("relocatable file\n"); + break; + case ET_EXEC: + printf("executable file\n"); + break; + case ET_DYN: + printf("shared object file\n"); + break; + case ET_CORE: + printf("core file\n"); + break; + default: + printf("\n"); + break; + } + printf(" machine: "); + switch (ehdr.e_machine) + { + case EM_NONE: + printf("invalid\n"); + break; + case EM_M32: + printf("AT&T WE 32100\n"); + break; + case EM_SPARC: + printf("SPARC\n"); + break; + case EM_386: + printf("Intel 80386\n"); + break; + case EM_68K: + printf("Motorola 68000\n"); + break; + case EM_88K: + printf("Motorola 88000\n"); + break; + case EM_860: + printf("Intel 80860\n"); + break; + case EM_MIPS: + printf("MIPS RS3000\n"); + break; + default: + printf("\n"); + break; + } + printf(" flags: 0x%lX\n", + (long unsigned) ehdr.e_flags); + printf("\n"); + printf(" entry point: 0x%lX\n", + (long unsigned) ehdr.e_entry); + printf("\n"); + printf(" program header table (offset): %i bytes\n", ehdr.e_phoff); + printf(" size of entry: %i bytes\n", ehdr.e_phentsize); + printf(" number of entries: %i\n", ehdr.e_phnum); + printf("\n"); + printf(" section header table (offset): %i bytes\n", ehdr.e_shoff); + printf(" size of entry: %i bytes\n", ehdr.e_shentsize); + printf(" number of entries: %i\n", ehdr.e_shnum); + printf(" index of string table: %i\n", ehdr.e_shstrndx); + printf("\n"); + printf(" size of ELF header: %i bytes\n", ehdr.e_ehsize); + printf("-----------------------------------------------------\n"); + printf("\n"); +} + +void +elf_dump_phdr(Elf32_Phdr phdr) +{ + printf("-----------------------------------------------------\n"); + printf("program header:\n"); + printf(" type: "); + switch (phdr.p_type) + { + case PT_NULL: + printf("unused\n"); + break; + case PT_LOAD: + printf("loadable segment\n"); + break; + case PT_DYNAMIC: + printf("dynamic linking information\n"); + break; + case PT_INTERP: + printf("interpreter information\n"); + break; + case PT_NOTE: + printf("auxiliary information\n"); + break; + case PT_SHLIB: + printf("warning: segment type is reserved but has unspeciļ¬ed semantics\n"); + break; + case PT_PHDR: + printf("program header table information\n"); + break; + default: + printf("\n"); + break; + } + printf(" offset: 0x%lX\n", (long unsigned) phdr.p_offset); + printf(" virtual address: 0x%lX\n", (long unsigned) phdr.p_vaddr); + printf(" physical address: 0x%lX\n", (long unsigned) phdr.p_paddr); + printf(" size (file image): %i\n", phdr.p_filesz); + printf(" size (memory image): %i\n", phdr.p_memsz); + printf(" flags: "); + printf((phdr.p_flags & PF_R) ? "R" : " "); + printf((phdr.p_flags & PF_W) ? "W" : " "); + printf((phdr.p_flags & PF_X) ? "X" : " "); + printf("\n"); + printf(" alignment: %i\n", phdr.p_align); + printf("-----------------------------------------------------\n"); + printf("\n"); +} + +void +elf_dump_shdr(Elf32_Shdr shdr) +{ + printf("-----------------------------------------------------\n"); + printf("section header:\n"); + printf(" name: 0x%lX\n", (long unsigned) shdr.sh_name); + printf(" type: "); + switch (shdr.sh_type) + { + case SHT_NULL: + printf("inactive\n"); + break; + case SHT_PROGBITS: + printf("information defined by program\n"); + break; + case SHT_SYMTAB: + printf("symbol table (SYMTAB)\n"); + break; + case SHT_STRTAB: + printf("string table\n"); + break; + case SHT_RELA: + printf("relocation entries (explicit addends)\n"); + break; + case SHT_HASH: + printf("symbol hash table\n"); + break; + case SHT_DYNAMIC: + printf("information for dynamic linking\n"); + break; + case SHT_NOTE: + printf("note section\n"); + break; + case SHT_NOBITS: + printf("section occupies no space\n"); + break; + case SHT_REL: + printf("relocation entries\n"); + break; + case SHT_SHLIB: + printf("reserved but unspecified semantics\n"); + break; + case SHT_DYNSYM: + printf("symbol table (DYNSYM)\n"); + break; + default: + printf("\n"); + break; + } + printf(" flags: "); + printf((shdr.sh_flags & SHF_WRITE) ? "W" : " "); + printf((shdr.sh_flags & SHF_ALLOC) ? "A" : " "); + printf((shdr.sh_flags & SHF_EXECINSTR) ? "X" : " "); + printf("\n"); + printf(" address: 0x%lX\n", (long unsigned) shdr.sh_addr); + printf(" offset: %i bytes\n", shdr.sh_offset); + printf(" size: %i bytes\n", shdr.sh_size); + printf(" link: 0x%lX\n", (long unsigned) shdr.sh_link); + printf(" info: 0x%lX\n", (long unsigned) shdr.sh_info); + printf(" alignment: %i\n", shdr.sh_addralign); + printf(" size (entry): %i bytes\n", shdr.sh_entsize); + printf("-----------------------------------------------------\n"); + printf("\n"); +} + +void +elf_dump_dyn(Elf32_Dyn dyn) +{ + printf("-----------------------------------------------------\n"); + printf("dynamic structure:\n"); + printf(" tag: "); + switch (dyn.d_tag) + { + case DT_NULL: + printf("end of _DYNAMIC array\n"); + break; + case DT_NEEDED: + printf("needed library\n"); + break; + case DT_PLTRELSZ: + printf("size of relocation entries\n"); + break; + case DT_PLTGOT: + printf("procedure linkage table / global offset table\n"); + break; + case DT_HASH: + printf("symbol hash table\n"); + break; + case DT_STRTAB: + printf("string table\n"); + break; + case DT_SYMTAB: + printf("symbol table\n"); + break; + case DT_RELA: + printf("relocation table\n"); + break; + case DT_RELASZ: + printf("size of relocation table\n"); + break; + case DT_RELAENT: + printf("size of relocation table entry\n"); + break; + case DT_STRSZ: + printf("size of string table\n"); + break; + case DT_SYMENT: + printf("size of symbol table entry\n"); + break; + case DT_INIT: + printf("initialization function\n"); + break; + case DT_FINI: + printf("termination function\n"); + break; + case DT_SONAME: + printf("shared object\n"); + break; + case DT_RPATH: + printf("library search path\n"); + break; + case DT_SYMBOLIC: + printf("alters symbol resolution algorithm\n"); + break; + case DT_REL: + printf("relocation table (implicit addends)\n"); + break; + case DT_RELSZ: + printf("size of relocation table (implicit addends)\n"); + break; + case DT_RELENT: + printf("size of relocation table (implicit adddends) entry\n"); + break; + case DT_PLTREL: + printf("type of relocation entry (procedure linkage table)\n"); + break; + case DT_DEBUG: + printf("debugging\n"); + break; + case DT_TEXTREL: + printf("no modification to non-writable segments\n"); + break; + case DT_JMPREL: + printf("address of relocation entry\n"); + break; + default: + printf("\n"); + break; + } + printf(" value: 0x%lX\n", (long unsigned) dyn.d_un.d_val); + printf("-----------------------------------------------------\n"); + printf("\n"); +} + +void +elf_dump_sym(Elf32_Sym sym) +{ + printf("-----------------------------------------------------\n"); + printf("symbol table entry:\n"); + printf(" name: 0x%lX\n", (long unsigned) sym.st_name); + printf(" value: 0x%lX\n", (long unsigned) sym.st_value); + printf(" size: %i bytes\n", sym.st_size); + printf(" info: %i\n", sym.st_info); + printf(" other: %i\n", sym.st_other); + printf(" section header table index: 0x%lX\n", (long unsigned) sym.st_shndx); + printf("-----------------------------------------------------\n"); + printf("\n"); +} diff --git a/elf_utils.h b/elf_utils.h new file mode 100644 index 0000000..e194125 --- /dev/null +++ b/elf_utils.h @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef ELF_UTILS_H_ +#define ELF_UTILS_H_ + +#include +#include + +#include "types.h" + +extern pid_t pid; + +int +elf_is_valid(vaddr_t); + +int +elf_read(vaddr_t, void *, size_t); + +#define elf_read_ehdr(addr, ehdr) elf_read(addr, &ehdr, sizeof(Elf32_Ehdr)) + +#define elf_read_phdr(addr, phdr) elf_read(addr, &phdr, sizeof(Elf32_Phdr)) + +#define elf_read_shdr(addr, shdr) elf_read(addr, &shdr, sizeof(Elf32_Shdr)) + +#define elf_read_dyn(addr, dyn) elf_read(addr, &dyn, sizeof(Elf32_Dyn)) + +#define elf_read_sym(addr, sym) elf_read(addr, &sym, sizeof(Elf32_Sym)) + +char * +elf_read_string(vaddr_t); + +void +elf_dump_ehdr(Elf32_Ehdr); + +void +elf_dump_phdr(Elf32_Phdr); + +void +elf_dump_shdr(Elf32_Shdr); + +void +elf_dump_dyn(Elf32_Dyn); + +void +elf_dump_sym(Elf32_Sym); + +#endif /* ELF_UTILS_H_ */ diff --git a/inject.sh b/inject.sh new file mode 100755 index 0000000..d96491b --- /dev/null +++ b/inject.sh @@ -0,0 +1,9 @@ +#!/bin/bash +open=`ps -e | grep Game.exe | wc -l` +if [ $open -gt 0 ]; then + pid=`ps -e | grep -m 1 Game.exe | sed -e 's/^ *//' -e 's/^\([0-9][0-9]*\) .*/\1/'` + surgeon -i $pid snoogans.so +else + echo "err: couldn't find Game.exe" +fi + diff --git a/proc_utils.c b/proc_utils.c new file mode 100644 index 0000000..c1d17cd --- /dev/null +++ b/proc_utils.c @@ -0,0 +1,252 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include + +#include "proc_utils.h" + +#define PID_MAX 5 + +char * +read_line(FILE *file) +{ + static char *line = NULL; + + if (line) + { + free(line); + line = NULL; + } + + int i = 0; + while (!feof(file)) + { + if (i % 512 == 0) + { + line = (char *) realloc(line, i + 512); + if (line == NULL) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + } + + char chr = fgetc(file); + if (chr == EOF) + { + break; + } + if (chr == '\n') + { + line[i] = '\0'; + break; + } + line[i++] = chr; + } + + return line; +} + +int +proc_get_object_base(const char *object, vaddr_t *base) +{ + char *path = + (char *) malloc(strlen("/proc/") + PID_MAX + strlen("/maps") + 1); + if (path == NULL) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + sprintf(path, "/proc/%u/maps", pid); + FILE *maps = fopen(path, "r"); + if (maps == NULL) + { + printf("err: %s\n", strerror(errno)); + free(path); + return 0; + } + + int found = 0; + char *line; + while ((line = read_line(maps))) + { + if (strstr(line, object)) + { + char *tmp = strchr(line, '-'); + if (tmp) + { + *tmp = '\0'; + sscanf(line, "%lx", (long unsigned *) base); + found = 1; + break; + } + } + } + + fclose(maps); + free(path); + + return found; +} + +char * +proc_get_object_path(vaddr_t object_base) +{ + static char *object_path = NULL; + + if (object_path) + { + free(object_path); + object_path = NULL; + } + + char *path = + (char *) malloc(strlen("/proc/") + PID_MAX + strlen("/maps") + 1); + if (path == NULL) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + sprintf(path, "/proc/%u/maps", pid); + FILE *maps = fopen(path, "r"); + if (maps == NULL) + { + printf("err: %s\n", strerror(errno)); + free(path); + return NULL; + } + + char *line; + while ((line = read_line(maps))) + { + char *tmp = strchr(line, '-'); + if (tmp) + { + *tmp++ = '\0'; + vaddr_t base; + sscanf(line, "%lx", (long unsigned *) &base); + if (base == object_base) + { + object_path = (char *) malloc(strlen(tmp)); + strcpy(object_path, strchr(tmp, '/')); + break; + } + } + } + + fclose(maps); + free(path); + + return object_path; +} + +char * +proc_get_executable() +{ + static char *executable; + + if (executable) + { + free(executable); + executable = NULL; + } + + char *path = (char *) malloc(strlen("/proc/") + PID_MAX + strlen("/exe") + 1); + if (path == NULL) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + sprintf(path, "/proc/%u/exe", pid); + executable = (char *) malloc(PATH_MAX); // let's hope that one is defined :( + if (readlink(path, executable, PATH_MAX) == -1) + { + printf("err: %s\n", strerror(errno)); + free(path); + return NULL; + } + + free(path); + + return executable; +} + +int +proc_iterate_addrspace(vaddr_t *base) +{ + static FILE *maps = NULL; + if (maps == NULL) + { + char *path = (char *) malloc(strlen("/proc/") + PID_MAX + strlen("/maps") + + 1); + if (path == NULL) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + sprintf(path, "/proc/%u/maps", pid); + maps = fopen(path, "r"); + if (maps == NULL) + { + printf("err: %s\n", strerror(errno)); + free(path); + return 0; + } + free(path); + } + + char *line; + while ((line = read_line(maps))) + { + char *tmp = strchr(line, '-'); + if (tmp) + { + *tmp++ = '\0'; + strtok(tmp, " "); + tmp = strtok(NULL, " "); + if (strchr(tmp, 'r')) + { + strtok(NULL, " "); + strtok(NULL, " "); + strtok(NULL, " "); + tmp = strtok(NULL, " "); + if (tmp) + { + if (strstr(tmp, "/dev") == tmp) + { + continue; + } + } + sscanf(line, "%lx", (long unsigned *) base); + return 1; + } + else + { + continue; + } + } + } + fclose(maps); + maps = NULL; + + return 0; +} diff --git a/proc_utils.h b/proc_utils.h new file mode 100644 index 0000000..6bfc13f --- /dev/null +++ b/proc_utils.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef PROC_UTILS_H_ +#define PROC_UTILS_H_ + +#include +#include + +#include "types.h" + +extern pid_t pid; + +char * +read_line(FILE *); + +int +proc_get_object_base(const char *, vaddr_t *); + +char * +proc_get_object_path(vaddr_t); + +char * +proc_get_executable(); + +int +proc_iterate_addrspace(vaddr_t *); + +#endif /* PROC_UTILS_H_ */ diff --git a/ptrace_utils.c b/ptrace_utils.c new file mode 100644 index 0000000..74c7598 --- /dev/null +++ b/ptrace_utils.c @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include + +#include "ptrace_utils.h" + +long * +ptrace_read(vaddr_t addr, size_t len) +{ + static long *data = NULL; + + int size = (len / sizeof(long)) + ((len % sizeof(long)) ? 1 : 0); + if (data) + { + free(data); + } + data = (long *) malloc(size * sizeof(long)); + if (data == NULL) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + + int i; + for (i = 0; i < size; i++) + { + errno = 0; + long word = ptrace(PTRACE_PEEKDATA, pid, addr + i * sizeof(long), NULL); + if (word == -1 && errno) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + data[i] = word; + } + + return data; +} + +int +ptrace_write(vaddr_t addr, void *data, size_t len) +{ + int size = (len / sizeof(long)) + ((len % sizeof(long)) ? 1 : 0); + int i; + for (i = 0; i < size; i++) + { + long word = 0; + size_t remaining = len - (i * sizeof(long)); + memcpy(&word, (long *) data + i, (remaining < sizeof(long)) ? remaining + : sizeof(long)); + if (ptrace(PTRACE_POKEDATA, pid, addr + i * sizeof(long), word) == -1) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + } + return 1; +} + +void * +ptrace_call(vaddr_t addr, struct user_regs_struct *regs) +{ + regs->eip = (long) addr; + if (ptrace(PTRACE_SETREGS, pid, NULL, regs) == -1) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + if (ptrace(PTRACE_CONT, pid, NULL, NULL) == -1) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + wait(NULL); + if (ptrace(PTRACE_GETREGS, pid, NULL, regs) == -1) + { + printf("err: %s\n", strerror(errno)); + return NULL; + } + return (void *) regs->eax; +} diff --git a/ptrace_utils.h b/ptrace_utils.h new file mode 100644 index 0000000..541efa7 --- /dev/null +++ b/ptrace_utils.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef PTRACE_UTILS_H_ +#define PTRACE_UTILS_H_ + +#include +#include +#include + +#include "types.h" + +extern pid_t pid; + +#define ALIGN_SIZE(size) ((size) + (sizeof(long) - (((size) % sizeof(long)) ? ((size) % sizeof(long)) : sizeof(long)))) + +long * +ptrace_read(vaddr_t, size_t); + +int +ptrace_write(vaddr_t, void *, size_t); + +void * +ptrace_call(vaddr_t, struct user_regs_struct *); + +#endif /* PTRACE_UTILS_H_ */ diff --git a/stubs.S b/stubs.S new file mode 100644 index 0000000..476fd35 --- /dev/null +++ b/stubs.S @@ -0,0 +1,53 @@ + +# Copyright (C) 2010 gonzoj +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + + +.section .text + +.globl call_malloc_STUB +.globl call_free_STUB +.globl call_libc_dlopen_mode_STUB +.globl call_libc_dlclose_STUB + +.type call_malloc_STUB, @function +call_malloc_STUB: + + push %ecx + call *%eax + int $0x3 + +.type call_free_STUB, @function +call_free_STUB: + + push %ecx + call *%eax + int $0x3 + +.type call_libc_dlopen_mode_STUB, @function +call_libc_dlopen_mode_STUB: + + push %ecx + push %edx + call *%eax + int $0x3 + +.type call_libc_dlclose_STUB, @function +call_libc_dlclose_STUB: + + push %ecx + call *%eax + int $0x3 + diff --git a/stubs.h b/stubs.h new file mode 100644 index 0000000..912c5c7 --- /dev/null +++ b/stubs.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef STUBS_H_ +#define STUBS_H_ + +/* address of function must be in eax, arguments in ecx, edx */ + +#define call_malloc_STUB_size 4 +void * +call_malloc_STUB(); + +#define call_free_STUB_size 4 +void * +call_free_STUB(); + +#define call_libc_dlopen_mode_STUB_size 5 +void * +call_libc_dlopen_mode_STUB(); + +#define call_libc_dlclose_STUB_size 4 +void * +call_libc_dlclose_STUB(); + +#endif /* STUBS_H_ */ diff --git a/surgeon.c b/surgeon.c new file mode 100644 index 0000000..eb20f18 --- /dev/null +++ b/surgeon.c @@ -0,0 +1,646 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "elf_utils.h" +#include "proc_utils.h" +#include "ptrace_utils.h" +#include "stubs.h" +#include "types.h" + +pid_t pid = 0; + +char *module_to_load = NULL; + +char action = 'i'; + +char *libc_path = NULL; + +Elf32_Off malloc_off = 0; +Elf32_Off free_off = 0; +Elf32_Off dlopen_off = 0; +Elf32_Off dlclose_off = 0; + +int +resolve_symbol_generic(vaddr_t base, const char *symbol, vaddr_t *resolved) +{ + if (elf_is_valid(base)) + { + Elf32_Ehdr ehdr; + if (elf_read_ehdr(base, ehdr)) + { + if (ehdr.e_type == ET_DYN) + { + vaddr_t phdr_table = base + ehdr.e_phoff; + int i; + for (i = 0; i < ehdr.e_phnum * ehdr.e_phentsize; i + += ehdr.e_phentsize) + { + Elf32_Phdr phdr; + if (elf_read_phdr(phdr_table + i, phdr)) + { + if (phdr.p_type == PT_DYNAMIC) + { + vaddr_t dyn_section = base + phdr.p_offset; + Elf32_Off dyn_off = 0; + vaddr_t symtab = 0, strtab = 0; + long nchain = 0; + Elf32_Dyn dyn; + do + { + if (!elf_read_dyn(dyn_section + dyn_off, dyn)) + { + break; + } + dyn_off += sizeof(Elf32_Dyn); + if (dyn.d_tag == DT_SYMTAB) + { + symtab + = ((vaddr_t) dyn.d_un.d_ptr < base) ? base + + dyn.d_un.d_ptr + : (vaddr_t) dyn.d_un.d_ptr; + } + else if (dyn.d_tag == DT_STRTAB) + { + strtab + = ((vaddr_t) dyn.d_un.d_ptr < base) ? base + + dyn.d_un.d_ptr + : (vaddr_t) dyn.d_un.d_ptr; + } + else if (dyn.d_tag == DT_HASH) + { + vaddr_t hash = ((vaddr_t) dyn.d_un.d_ptr + < base) ? base + dyn.d_un.d_ptr + : (vaddr_t) dyn.d_un.d_ptr; + if (!elf_read(hash + sizeof(Elf32_Word), + &nchain, sizeof(Elf32_Word))) + { + break; + } + } + } + while (dyn.d_tag != DT_NULL && !(symtab && strtab + && nchain)); + if (symtab && strtab && nchain) + { + int j; + for (j = 0; j < nchain * sizeof(Elf32_Sym); j + += sizeof(Elf32_Sym)) + { + Elf32_Sym sym; + if (elf_read_sym(symtab + j, sym)) + { + if (sym.st_name != 0) + { + char *sym_name = elf_read_string( + strtab + sym.st_name); + if (sym_name) + { + if (strcmp(symbol, sym_name) == 0) + { + *resolved + = ((vaddr_t) sym.st_value + < base) ? base + + sym.st_value + : (vaddr_t) sym.st_value; + return 1; + } + } + } + } + } + } + } + } + } + } + } + } + return 0; +} + +int +resolve_symbol_dumb(const char *object, const char *symbol, vaddr_t *resolved) +{ + char *cmd = (char *) malloc(strlen("readelf -s ") + strlen(object) + strlen( + " | grep ") + strlen(symbol) + 1); + if (cmd == NULL) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + sprintf(cmd, "readelf -s %s | grep %s", object, symbol); + FILE *output = popen(cmd, "r"); + if (output == NULL) + { + printf("err: %s\n", strerror(errno)); + free(cmd); + return 0; + } + char *line; + while ((line = read_line(output))) + { + if (strstr(line, "GLOBAL")) + { + Elf32_Off off; + strtok(line, ":"); + char *tmp = strtok(NULL, " "); + if (tmp) + { + sscanf(tmp, "%x", &off); + strtok(NULL, " "); + strtok(NULL, " "); + strtok(NULL, " "); + strtok(NULL, " "); + strtok(NULL, " "); + char *sym = strtok(NULL, "@"); + if (sym) + { + if (strcmp(symbol, sym) == 0) + { + vaddr_t base; + if (proc_get_object_base(object, &base)) + { + *resolved = base + off; + pclose(output); + free(cmd); + return 1; + } + } + } + } + } + } + pclose(output); + free(cmd); + return 0; +} + +int +load_module(const char *module, vaddr_t patch, vaddr_t sym__libc_dlopen_mode, + vaddr_t sym_malloc, vaddr_t sym_free) +{ + long success = 0; + + struct user_regs_struct regs_backup; + struct user_regs_struct regs; + + if (ptrace(PTRACE_GETREGS, pid, NULL, ®s_backup) == -1) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + memcpy(®s, ®s_backup, sizeof(struct user_regs_struct)); + + long *patch_backup; + size_t patch_size = ALIGN_SIZE(call_malloc_STUB_size) + + ALIGN_SIZE(call_free_STUB_size) + + ALIGN_SIZE(call_libc_dlopen_mode_STUB_size); + if ((patch_backup = ptrace_read(patch, patch_size)) == NULL) + { + printf("err: could not backup original code\n"); + return 0; + } + vaddr_t free_stub = patch + ALIGN_SIZE(call_malloc_STUB_size); + vaddr_t libc_dlopen_mode_stub = free_stub + ALIGN_SIZE(call_free_STUB_size); + if (!ptrace_write(patch, call_malloc_STUB, call_malloc_STUB_size)) + { + printf("err: could not patch in malloc stub\n"); + return 0; + } + if (!ptrace_write(free_stub, call_free_STUB, call_free_STUB_size)) + { + printf("err: could not patch in free stub\n"); + goto backup; + } + if (!ptrace_write(libc_dlopen_mode_stub, call_libc_dlopen_mode_STUB, + call_libc_dlopen_mode_STUB_size)) + { + printf("err: could not patch in __libc_dlopen_mode stub\n"); + goto backup; + } + + regs.eax = (long) sym_malloc; + regs.ecx = (long) ALIGN_SIZE(strlen(module) + 1); + vaddr_t module_string = ptrace_call(patch, ®s); + if (module_string == NULL) + { + printf("err: allocating memory for module name failed\n"); + goto backup; + } + if (!ptrace_write(module_string, (void *) module, strlen(module) + 1)) + { + printf("err: failed to write module name\n"); + goto cleanup; + } + + regs.eax = (long) sym__libc_dlopen_mode; + regs.ecx = (long) RTLD_LAZY | 0x80000000; + regs.edx = (long) module_string; + success = (long) ptrace_call(libc_dlopen_mode_stub, ®s); + + cleanup: regs.eax = (long) sym_free; + regs.ecx = (long) module_string; + ptrace_call(free_stub, ®s); + + backup: if (!ptrace_write(patch, patch_backup, patch_size)) + { + printf("err: failed to restore original code\n"); + success = 0; + } + if (ptrace(PTRACE_SETREGS, pid, NULL, ®s_backup) == -1) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + + return success; +} + +int +unload_module(const char *module, vaddr_t patch, vaddr_t sym__libc_dlclose, + vaddr_t sym__libc_dlopen_mode, vaddr_t sym_malloc, vaddr_t sym_free) +{ + struct user_regs_struct regs_backup; + struct user_regs_struct regs; + + if (ptrace(PTRACE_GETREGS, pid, NULL, ®s_backup) == -1) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + memcpy(®s, ®s_backup, sizeof(struct user_regs_struct)); + + long *patch_backup; + size_t patch_size = ALIGN_SIZE(call_malloc_STUB_size) + + ALIGN_SIZE(call_free_STUB_size) + + ALIGN_SIZE(call_libc_dlopen_mode_STUB_size) + + ALIGN_SIZE(call_libc_dlclose_STUB_size); + if ((patch_backup = ptrace_read(patch, patch_size)) == NULL) + { + printf("err: could not backup original code\n"); + return 0; + } + vaddr_t free_stub = patch + ALIGN_SIZE(call_malloc_STUB_size); + vaddr_t libc_dlopen_mode_stub = free_stub + ALIGN_SIZE(call_free_STUB_size); + vaddr_t libc_dlclose_stub = libc_dlopen_mode_stub + + ALIGN_SIZE(call_libc_dlopen_mode_STUB_size); + if (!ptrace_write(patch, call_malloc_STUB, call_malloc_STUB_size)) + { + printf("err: could not patch in malloc stub\n"); + return 0; + } + if (!ptrace_write(free_stub, call_free_STUB, call_free_STUB_size)) + { + printf("err: could not patch in free stub\n"); + goto backup; + } + if (!ptrace_write(libc_dlopen_mode_stub, call_libc_dlopen_mode_STUB, + call_libc_dlopen_mode_STUB_size)) + { + printf("err: could not patch in __libc_dlopen_mode stub\n"); + goto backup; + } + if (!ptrace_write(libc_dlclose_stub, call_libc_dlclose_STUB, + call_libc_dlclose_STUB_size)) + { + printf("err: could not patch in __libc_dlclose stub\n"); + goto backup; + } + + regs.eax = (long) sym_malloc; + regs.ecx = (long) ALIGN_SIZE(strlen(module) + 1); + vaddr_t module_string = ptrace_call(patch, ®s); + if (module_string == NULL) + { + printf("err: could not allocate memory for module name\n"); + goto backup; + } + if (!ptrace_write(module_string, (void *) module, strlen(module) + 1)) + { + printf("err: failed to write module name\n"); + goto cleanup; + } + + regs.eax = (long) sym__libc_dlopen_mode; + regs.ecx = (long) RTLD_LAZY | 0x80000000; + regs.edx = (long) module_string; + void *handle = ptrace_call(libc_dlopen_mode_stub, ®s); + if (handle == NULL) + { + printf("err: could not get a handle for %s\n", module); + goto cleanup; + } + + long success = 1; + vaddr_t base; + while (proc_get_object_base(module, &base)) + { + regs.eax = (long) sym__libc_dlclose; + regs.ecx = (long) handle; + if (ptrace_call(libc_dlclose_stub, ®s)) + { + printf("err: __libc_dlclose returned with error\n"); + success = 0; + break; + } + } + + cleanup: regs.eax = (long) sym_free; + regs.ecx = (long) module_string; + ptrace_call(free_stub, ®s); + + backup: if (!ptrace_write(patch, patch_backup, patch_size)) + { + success = 0; + } + if (ptrace(PTRACE_SETREGS, pid, NULL, ®s_backup) == -1) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + + return success; +} + +int +parse_arguments(int argc, char **argv) +{ + struct option long_options[] = + { + { "libc", required_argument, 0, 'a' }, + { "malloc", required_argument, 0, 'b' }, + { "free", required_argument, 0, 'c' }, + { "dlopen", required_argument, 0, 'd' }, + { "dlclose", required_argument, 0, 'e' }, + { 0 } }; + while (optind < argc) + { + int index = -1; + int result = getopt_long(argc, argv, "hiu", long_options, &index); + if (result == -1) + { + break; + } + switch (result) + { + case 'a': + libc_path = (char *) malloc(strlen(optarg) + 1); + if (libc_path == NULL) + { + printf("err: %s\n", strerror(errno)); + return 0; + } + strcpy(libc_path, optarg); + break; + case 'b': + if (!sscanf(optarg, "%lx", (long unsigned *) &malloc_off)) + { + return 0; + } + break; + case 'c': + if (!sscanf(optarg, "%lx", (long unsigned *) &free_off)) + { + return 0; + } + break; + case 'd': + if (!sscanf(optarg, "%lx", (long unsigned *) &dlopen_off)) + { + return 0; + } + break; + case 'e': + if (!sscanf(optarg, "%lx", (long unsigned *) &dlclose_off)) + { + return 0; + } + break; + case 'h': + return 0; + case 'i': + case 'u': + action = result; + break; + case '?': + printf("err: unknown parameter\n"); + return 0; + case ':': + printf("err: missing argument\n"); + return 0; + } + } + if (argc - optind < 2) + { + return 0; + } + if (!sscanf(argv[optind++], "%i", &pid)) + { + return 0; + } + module_to_load = (char *) malloc(strlen(argv[optind]) + 1); + strcpy(module_to_load, argv[optind++]); + return 1; +} + +void +usage() +{ + printf("\n"); + printf("usage:\n"); + printf(" surgeon [OPTION]... PID MODULE\n"); + printf("\n"); + printf(" OPTIONS:\n"); + printf(" -h display usage\n"); + printf(" -i inject MODULE into process PID (default)\n"); + printf(" -u unload MODULE from process PID\n"); + printf(" --libc=PATH set location of libc to PATH\n"); + printf(" --malloc=OFFSET set offset for symbol malloc to OFFSET\n"); + printf(" --free=OFFSET set offset for symbol free to OFFSET\n"); + printf( + " --dlopen=OFFSET set offset for symbol __libc_dlopen_mode to OFFSET\n"); + printf( + " --dlclose=OFFSET set offset for symbol __libc_dlclose to OFFSET\n"); + printf("\n"); +} + +int +main(int argc, char **argv) +{ + if (!parse_arguments(argc, argv)) + { + usage(); + exit(EXIT_FAILURE); + } + + if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) == -1) + { + printf("err: could not attach to process %i (%s)\n", pid, strerror(errno)); + exit(EXIT_FAILURE); + } + + vaddr_t libc_base = 0, patch = 0, p_malloc = 0, p_free = 0, p_dlopen = 0, + p_dlclose = 0; + + if (libc_path) + { + proc_get_object_base(libc_path, &libc_base); + } + else + { + proc_get_object_base("libc-", &libc_base); + } + + if (libc_base) + { + if (libc_path == NULL) + { + libc_path = proc_get_object_path(libc_base); + } + if (malloc_off) + { + p_malloc = libc_base + malloc_off; + } + else if (!resolve_symbol_generic(libc_base, "malloc", &p_malloc)) + { + if (libc_path) + { + resolve_symbol_dumb(libc_path, "malloc", &p_malloc); + } + } + if (free_off) + { + p_free = libc_base + free_off; + } + else if (!resolve_symbol_generic(libc_base, "free", &p_free)) + { + if (libc_path) + { + resolve_symbol_dumb(libc_path, "free", &p_free); + } + } + if (dlopen_off) + { + p_dlopen = libc_base + dlopen_off; + } + else if (!resolve_symbol_generic(libc_base, "__libc_dlopen_mode", + &p_dlopen)) + { + if (libc_path) + { + resolve_symbol_dumb(libc_path, "__libc_dlopen_mode", &p_dlopen); + } + } + if (dlclose_off && action == 'u') + { + p_dlclose = libc_base + dlclose_off; + } + else if (!resolve_symbol_generic(libc_base, "__libc_dlclose", &p_dlclose) + && action == 'u') + { + if (libc_path) + { + resolve_symbol_dumb(libc_path, "__libc_dlclose", &p_dlclose); + } + } + } + else + { + vaddr_t addr; + while (proc_iterate_addrspace(&addr)) + { + if (!p_malloc) + { + resolve_symbol_generic(addr, "malloc", &p_malloc); + } + if (!p_free) + { + resolve_symbol_generic(addr, "free", &p_free); + } + if (!p_dlopen) + { + resolve_symbol_generic(addr, "__libc_dlopen_mode", &p_dlopen); + } + if (action == 'u' && !p_dlclose) + { + resolve_symbol_generic(addr, "__libc_dlclose", &p_dlclose); + } + } + } + + char *bin = proc_get_executable(); + if (bin) + { + proc_get_object_base(bin, &patch); + } + + if (!(patch && p_malloc && p_free && p_dlopen && (action == 'i' || p_dlclose))) + { + printf("err: could not resolve all necessary symbols\n"); + ptrace(PTRACE_DETACH, pid, NULL, NULL); + exit(EXIT_FAILURE); + } + else + { + int success; + switch (action) + { + case 'i': + printf("injecting module %s into process %i\n", module_to_load, pid); + success + = load_module(module_to_load, patch, p_dlopen, p_malloc, p_free); + if (!success) + { + printf("err: failed to load module %s\n", module_to_load); + } + else + { + printf("successfully injected module %s\n", module_to_load); + } + break; + case 'u': + printf("unloading module %s from process %i\n", module_to_load, pid); + success = unload_module(module_to_load, patch, p_dlclose, p_dlopen, + p_malloc, p_free); + if (!success) + { + printf("err: failed to unload module %s\n", module_to_load); + } + else + { + printf("successfully unloaded module %s\n", module_to_load); + } + break; + } + if (!success) + { + ptrace(PTRACE_DETACH, pid, NULL, NULL); + exit(EXIT_FAILURE); + } + } + + ptrace(PTRACE_DETACH, pid, NULL, NULL); + exit(EXIT_SUCCESS); +} diff --git a/types.h b/types.h new file mode 100644 index 0000000..28e185f --- /dev/null +++ b/types.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2010 gonzoj + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef TYPES_H_ +#define TYPES_H_ + +typedef void * vaddr_t; + +#endif /* TYPES_H_ */ diff --git a/unload.sh b/unload.sh new file mode 100755 index 0000000..770ab2b --- /dev/null +++ b/unload.sh @@ -0,0 +1,9 @@ +#!/bin/bash +open=`ps -e | grep Game.exe | wc -l` +if [ $open -gt 0 ]; then + pid=`ps -e | grep -m 1 Game.exe | sed -e 's/^ *//' -e 's/^\([0-9][0-9]*\) .*/\1/'` + surgeon -u $pid snoogans.so +else + echo "err: couldn't find Game.exe" +fi + -- 2.11.4.GIT