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2024-03-14* exec/trace.c (rpl_stpcpy): Replace stpcpy if absent.Po Lu1-0/+30
2024-03-14Improve /proc/self/exe substitution on AndroidPo Lu4-11/+121
* exec/configure.ac (USER_SWORD): New macro. * exec/exec.c (format_pid): Export this function. * exec/exec.h: * exec/trace.c (canon_path): New function. (handle_readlinkat, handle_openat): Test complete file name against /proc/self/exe, and further check for /proc/pid/exe.
2024-01-29* exec/configure.ac (OPENAT_SYSCALL): Define on MIPS.Po Lu1-0/+4
2024-01-27Intercept calls to `openat' under AndroidPo Lu3-2/+150
* exec/configure.ac (OPEN_SYSCALL, OPENAT_SYSCALL): Define new macros. * exec/exec.h (struct exec_tracee): New field `sp'. * exec/trace.c (handle_openat): New function. (process_system_call): If handle_openat executes successfully, save the unmodified stack pointer within the tracee structure to be restored once the system call completes.
2024-01-21; * exec/Makefile.in: Correct typo.Po Lu1-1/+1
2024-01-21; * exec/Makefile.in (extraclean): Remove standard files.Po Lu1-2/+5
2024-01-20Fix autogen.sh’s spurious ‘git diff’ outputPaul Eggert3-4222/+0
Problem reported by Gerd Möllmann (Bug#68464). * .gitignore: Ignore files in exec that are now copied from build-aux. * admin/merge-gnulib (avoided_flags): Instead of clearing autom4te.cache here ... * autogen.sh (do_git): ... clear it here. Use config.guess, config.sub and install-sh from the Emacs repository, as they are more likely to be up to date. This avoids unnecessary differences among different builders, and avoids unnecessary ‘git diff’ output after autogen.sh. Also, copy these files from build-aux to exec since there should be no difference between the two copies. * exec/config.guess, exec/config.sub, exec/install-sh: Remove from repository, as autogen.sh now copies them from build-aux.
2024-01-02; Update copyright years in more filesPo Lu1-1/+1
2024-01-02; Add 2024 to copyright yearsPo Lu20-20/+20
2023-12-10; Use ?c instead of integer in local variablesStefan Kangas3-3/+3
* exec/loader-armeabi.s (timespec): * exec/loader-mips64el.s (__start): * exec/loader-mipsel.s (__start): Use ?c instead of integer in local variables.
2023-12-10; Fix typosStefan Kangas2-2/+2
2023-11-26; Update Autoconf auxiliaries in execPo Lu2-27/+50
* exec/config.guess: * exec/config.sub: Update configury files.
2023-09-18Correct build on systems without PAGE_MASKPo Lu1-1/+1
* exec/exec.c (write_load_command) <PAGE_MASK, PAGE_SIZE>: Uniformly define even if !HAVE_GETPAGESIZE.
2023-09-18Correct crash in child processes under armeabi AndroidPo Lu1-8/+14
* exec/trace.c (process_system_call) <READLINKAT_SYSCALL>: Examine tracee->waiting_for_syscall and avoid rewriting user arguments if a system call is presently being executed by the kernel. Reported by Romário Rios <romariorios@protonmail.com>.
2023-08-12Avoid stpncpyPaul Eggert2-74/+7
It’s not worth the porting hassle, and as the glibc manual says, “this function is generally a poor choice for processing strings”. * admin/merge-gnulib (GNULIB_MODULES): Remove stpncpy. * exec/configure.ac: Do not check for stpncpy. * exec/exec.c (rpl_stpncpy, stpncpy): Remove this replacement. (exec_0): Properly clear buffer1. Use memcpy instead of stpncpy to add the trailing name. This code is clearly still suboptimal but efficiency is not that important here and I tried to minimize the change. * lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
2023-08-07Stop tracking exec/config.h.inPo Lu1-358/+0
* .gitignore: Add exec/config.h.in. * exec/config.h.in: Remove from Git.
2023-07-20Update Android portPo Lu1-3/+3
* exec/trace.c (handle_readlinkat): Adjust commentary to match behavior. * src/android.c (android_get_keysym_name): NULL terminate *name_return.
2023-06-27; * exec/loader-mips64el.s (rest_of_exec): Fix typo in comment.Po Lu1-1/+1
2023-06-19; * exec/Makefile.in (clean): Add `exec1'.Po Lu1-1/+1
2023-05-31Update Android portPo Lu1-30/+63
* exec/exec.c (insert_args): New argument `arg3'. Replace argv[1] with that argument. (exec_0): Pass file name of script to `insert_args'.
2023-05-23; * exec/exec.c (exec_0): Use strcpy.Po Lu1-1/+1
2023-05-20Remove arbitrary process count limitPo Lu1-0/+12
* exec/trace.c (handle_clone_prepare): (handle_clone): When !REENTRANT, use malloc to allocate tracees after running out of static ones.
2023-05-05Fix execution of /proc/self/exe within child processesPo Lu2-39/+154
* exec/exec.h (struct exec_tracee): New field `new_child'. Also, make `waiting_for_syscall' a bitfield. * exec/trace.c (PTRACE_GETEVENTMSG): New declaration. (MAX_TRACEES): Bump to 4096. (handle_clone_prepare): New function. (handle_clone): If required, set `new_child' and wait for a ptrace event describing the parent to arrive. (after_fork): Clear new field. (exec_waitpid): Upon a ptrace event describing a clone, create the child's tracee if it doesn't already exist. Otherwise, copy over the parent's cmdline and start running it.
2023-05-05Update Android portPo Lu1-30/+46
* doc/emacs/android.texi (Android Environment): Document lossage with SIGSTOP. * exec/exec.c (exec_0): Check X_OK on file being opened. Also handle /proc/self/exe.
2023-05-05Update Android portPo Lu1-0/+4
* exec/trace.c (SYS_SECCOMP): Define when not present.
2023-05-04Update Android portPo Lu1-21/+97
* exec/trace.c (check_signal): New function. (handle_exec, process_system_call): Handle signal-delivery-stop while waiting synchronously for syscall completion.
2023-05-03Update Android portPo Lu3-0/+32
* exec/config.h.in: Autoheader. * exec/configure.ac: Check for siginfo_t.si_syscall. * exec/trace.c (exec_waitpid): If SIGSYS is received, and caused by seccomp, drop it should the call number be the invalid system call used by Emacs.
2023-05-03Update Android portPo Lu3-2/+161
* exec/config.h.in: Autoheader. * exec/configure.ac: Use system extensions. (HAVE_PROCESS_VM): Define if process_vm_readv and process_vm_writev are available. * exec/trace.c (read_memory, user_copy): Implement in terms of process_vm if possible.
2023-05-03Remove extra debugging codePo Lu1-4/+4
* exec/loader-mipsel.s (__start): Remove extraneous debugging code.
2023-05-03Update Android portPo Lu1-1/+2
* exec/Makefile.in: (.PHONY): Add `bootstrap-clean' and `extraclean'. (bootstrap-clean): New rule.
2023-05-02Update Android portPo Lu5-20/+288
* exec/config.h.in (__bool_true_false_are_defined): * exec/configure.ac (REENTRANT): New definition. (READLINKAT_SYSCALL, READLINK_SYSCALL): New defines. Set on all hosts. * exec/exec.c (MIN, MAX): Remove redundant declarations. Move to config.h. (exec_0): Copy name of executable into NAME when !REENTRANT. * exec/exec.h (struct exec_tracee): New struct `exec_file'. * exec/trace.c (remove_tracee, handle_exec, handle_readlinkat) (process_system_call, after_fork): Handle readlinkat system calls.
2023-05-02Fix ps name in Android subprocessesPo Lu7-28/+115
* exec/Makefile.in (.SUFFIXES): Include ., then `srcdir'. * exec/loader-aarch64.s (_start): * exec/loader-armeabi.s (_start): * exec/loader-mips64el.s (__start): * exec/loader-mipsel.s (__start): * exec/loader-x86.s (_start): * exec/loader-x86_64.s (_start): Get basename of opened exec file and make it the command name. Fix envp skipping on x86 and various leaks.
2023-05-02Port Android port to older Android systemsPo Lu3-5/+14
* exec/config.h.in: Autoheader. * exec/configure.ac: Check for declarations of stpcpy and stpncpy. * exec/exec.c (stpcpy, stpncpy): Use replacements if declarations are not present; this happens when a new Android NDK is building for an old version of Android.
2023-05-01Update Android portPo Lu3-5/+109
* exec/config.h.in: Update config.h.in. * exec/configure.ac: Check for stpcpy and stpncpy. * exec/exec.c (rpl_stpcpy, rpl_stpncpy): Define replacements when they are not present on the system. (process_program_header): Fill comment.
2023-05-01Fix cwd relative process execution on AndroidPo Lu2-14/+78
* exec/exec.c (format_pid): New function. (exec_0): Make cwd relative file names relative to /proc/pid/cwd. * exec/trace.c (handle_exec): Handle EINTR. (process_system_call): Report failure without clobbering x0.
2023-05-01Fix syscall error reporting on aarch64Po Lu1-1/+20
* exec/trace.c (process_system_call): Save and restore x0, x1 and x2 regs after replacing them with an invalid file descriptor.
2023-05-01Update Android portPo Lu6-35/+95
* Makefile.in (extraclean): Clean in exec as well. * configure.ac: Fix detection of absolute srcdir. Also, pass CFLAGS. * exec/Makefile.in: (.c.o): Add -I. so config.h can be found.:(.s.o): Don't create m4 temporary in srcdir. * exec/config-mips.m4.in (DADDI2, DADDI3): New macros. Define to substitute if as cannot assemble daddi. * exec/configure.ac (user_h): Look for user.h in asm/ as well. Use new user.h. Also look in ptrace.h on arm systems. Check if as supports daddi on mips64. * exec/exec.c (check_interpreter): Fix char signedness bug. * exec/loader-mips64el.s (__start): Use DADDI2 and DADDI3 for two- and 3-operand daddi. * exec/mipsel-user.h: Don't include sgidefs.h. * java/INSTALL: Document that m4 is now required. * src/android.c (android_rewrite_spawn_argv): Add missing NULL.
2023-05-01Work around system restrictions regarding execPo Lu1-0/+6
* doc/emacs/android.texi (Android Environment): Document `android-use-exec-loader'. * exec/exec1.c (main): Set program group of child process. * src/android.c (android_rewrite_spawn_argv): New function. * src/android.h: Update prototypes. * src/androidfns.c (syms_of_androidfns): New variable `android_use_exec_loader'. * src/callproc.c (emacs_spawn): Rewrite the argument vector to use exec1 if necessary.
2023-05-01Remove exec/configurePo Lu1-6940/+0
* exec/configure: Remove file. * .gitignore: Add exec/configure.
2023-04-30Add helper binary `exec1'Po Lu24-0/+15915
* .gitignore: New files. * Makefile.in (mostlyclean_dirs): Add libexec, if its Makefile exists. * autogen.sh (do_git): Autoreconf in exec as well. * configure.ac: Configure libexec on Android. * exec/Makefile.in: * exec/README: * exec/config-mips.m4.in: * exec/config.guess: * exec/config.h.in: * exec/config.sub: * exec/configure: * exec/configure.ac: * exec/deps.mk: * exec/exec.c (MIN, struct exec_open_command) (struct exec_map_command, struct exec_jump_command) (write_open_command, write_load_command, process_interpreter_1) (process_interpreter, process_program_header, insert_args) (exec_0): * exec/exec.h (_EXEC_H_, struct elf_header_32) (struct program_header_32, struct dt_entry_32) (struct elf_header_64, struct program_header_64) (struct dt_entry_64, struct exec_tracee): * exec/exec1.c (main): * exec/install-sh (scriptversion): * exec/loader-aarch64.s (_start): * exec/loader-armeabi.s (_start): * exec/loader-mips64el.s (__start): * exec/loader-mipsel.s (__start): * exec/loader-x86.s (_start): * exec/loader-x86_64.s (_start): * exec/mipsel-user.h (_MIPSEL_USER_H_): * exec/mipsfpu.c (MIPS_ABI_FP_ANY, fpu_reqs, valid_abi_p) (fp_mode_for_abi, cpu_supports_fr0_p, determine_fpu_mode): * exec/mipsfpu.h (_MIPSFPU_H_, FP_FR0): * exec/test.c (print_usage, main): * exec/trace.c (MAX_TRACEES, aarch64_set_regs, read_memory) (user_alloca, user_copy, remove_tracee, handle_clone) (syscall_trap_p, handle_exec, process_system_call, tracing_execve) (after_fork, find_tracee, exec_waitpid, exec_init): New files. * java/Makefile.in (CROSS_EXEC_BINS): Add exec1 and loader. ($(CROSS_EXEC_BINS) &): New target.
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