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2026-05-28Fix the Android build againPo Lu
* exec/trace.c (ARRAYELTS, establish_seccomp_filter): Restore ARRAYELTS, since Gnulib is not available in the exec library.
2026-05-26ARRAYELTS → countofPaul Eggert
C2y will standardize countof as the macro that Emacs uses the name ARRAYELTS for. Switch to the standard name, which is supported by GCC 16+, by Clang 21, and by the Gnulib stdcountof-h module already in use for compilers that do not support countof. Also, use countof in a few places where we missed using ARRAYELTS. * admin/coccinelle/arrayelts.cocci: Suggest countof, not ARRAYELTS. * admin/merge-gnulib (GNULIB_MODULES): Add stdcountof-h, as it is now a direct rather than an indirect dependency. * exec/trace.c, src/lisp.h, src/sfnt.c: Include <stdcountof.h>. (ARRAYELTS): Remove. All uses replaced by countof. * lib-src/ebrowse.c, lib-src/etags.c, lib-src/make-docfile.c: * lib-src/seccomp-filter.c, lwlib/lwlib-Xaw.c: Prefer <stdcountof.h> and countof to doing things by hand.
2026-05-25Revert "Don’t silently truncate file names in exec.c"Po Lu
This reverts commit 3461b450c5eae3ed53192aa9514e0b1ac1b1c8f2. Gnulib and intprops.h are not available from within the exec helper.
2026-05-23Don’t silently truncate file names in exec.cPaul Eggert
* exec/exec.c (format_pid): Simplify. No need for a local array. (exec_0): Shrink local buffer. If names are too long, fail instead of silently truncating them. Be cautious in case symlink is zero length (shouldn’t be possible in Android, but it’s easy to be safe).
2026-01-01; Add 2026 to copyright years.Sean Whitton
2025-04-15Port recent Android changes to mips64elPo Lu
* exec/config-mips.m4.in (DADDI2, DADDI3): Disable at-clobbering by assembler macros expressly. * exec/loader-mips64el.s: Adapt from loader-mipsel.s. * exec/configure.ac (exec_cv_as_daddi): Properly escape reg names. * exec/exec.c (struct exec_jump_command, exec_0): Don't define or set `fpu_mode' if __LP64__. * exec/exec.h (struct exec_tracee): New field `callno'. * exec/trace.c (process_system_call): Always record the current system call number in TRACEE lest it should be required once it has been overwritten upon the syscall's completion. (seccomp_system_call): Likewise. (after_fork): Clear `tracee->callno'.
2025-04-13Replace AT_EXECFN in auxiliary vectors of programs executed on AndroidPo Lu
* exec/exec.c (insert_args, exec_0): On non-MIPS systems, copy NAME and its length to the loader area. State that MIPS support is not yet available (though it will be pending the availability of a functioning emulator). * exec/loader-aarch64.s (_start): * exec/loader-armeabi.s (_start): * exec/loader-x86.s (_start): * exec/loader-x86_64.s (_start): Displace auxv, environ, and argv to create sufficient space for the provided file name, and copy the file name there. Replace AT_EXECFN to refer to this space.
2025-02-09Merge from savannah/emacs-30Po Lu
563efd6838c Fix program execution on Android 15 QPR2 Beta
2025-02-09Fix program execution on Android 15 QPR2 BetaPo Lu
* exec/trace.c (process_vm_readv, process_vm_writev): New function pointers. Attempt to load them on recent Android systems when `exec' was not linked with a sufficiently up-to-date libc. (read_memory, user_copy): Always use process_vm_readv and process_vm_writev if available. (handle_openat): Write trailing NULL byte of filename to user buffer. (exec_init): Attempt to dlsym process_vm_readv and process_vm_writev.
2025-01-02Update copyright year to 2025Stefan Kangas
Run "TZ=UTC0 admin/update-copyright".
2025-01-01Update copyright year to 2025Paul Eggert
Run "TZ=UTC0 admin/update-copyright".
2024-11-21; Fix typosStefan Kangas
2024-07-02Port seccomp acceleration to Linux 3.5.0Po Lu
* etc/NEWS: Update correspondingly. * exec/Makefile.in (config-mips.m4): Don't define rule or predicate $(LOADOBJS) on it elsewhere than on MIPS. * exec/README: Direct developers to GDB. * exec/trace.c (finish_exec): Resume the tracee after reporting an error in `exec'. (after_fork): If seccomp is enabled on Android, and the kernel is 4.7 or earlier, detect whether revisions to the sequencing of seccomp events have been backported from 4.8. (exec_waitpid): Resume the process with PTRACE_CONT after receiving an unknown signal. (exec_init): Cease disabling seccomp on Android kernels earlier than 4.8.
2024-07-01; * exec/trace.c (seccomp_system_call): Typo in commentary.Po Lu
2024-07-01Optimize process execution on AndroidPo Lu
* exec/configure.ac (REENTRANT): Remove option for reentrancy. (PROGRAM_COUNTER, HAVE_SECCOMP): Define register providing the program counter and enable seccomp if its headers are available. * exec/exec.c (write_load_command): Avoid defining unused variable. (exec_0): Remove code specific to REENTRANT configurations. * exec/exec.h (struct exec_tracee) <exec_data, data_size>: New fields for loader instructions and their size. * exec/exec1.c (main): Call exec_init before forking. * exec/mipsel-user.h (ELF_NGREG): Delete definition. (struct mipsel_regs): Reduce number of gregs to 32, but introduce separate fields for special registers. * exec/trace.c (use_seccomp_p): New variable; defile to false if !HAVE_SECCOMP. (remove_tracee): Cease providing for non-reentrant configurations. Release executable data if present. (handle_clone_prepare): Likewise. Resume process with PTRACE_CONT if seccomp-based interception is enabled. (handle_clone, check_signal): Resume processes as above. (handle_exec): Divide into two functions, with only rewriting the system call and generating instructions for the loader remaining in the first, and copying such instructions into the loader's stack removed into a new function, `finish_exec'. (finish_exec): New function. (handle_readlinkat, handle_openat): Abolish non-REENTRANT configurations. (process_system_call): Divide exec system calls into two phases, disambiguated by the value of tracee->waiting_for_syscall. Typo fixes. Accommodate syscall-exit-stops where the signal was initially intercepted by `seccomp_system_call'. (interesting_syscalls): New array. (ARRAYELTS): New macro. (seccomp_system_call, establish_seccomp_filter): New function. (tracing_execve) [HAVE_SECCOMP]: Establish a seccomp filter if this is to be enabled. (after_fork): Provide PTRACE_O_TRACESECCOMP. Resume process with PTRACE_CONT if seccomp-based interception is enabled. (exec_waitpid): Resume process with PTRACE_CONT if seccomp-based interception is enabled. Dispatch stops identifying as PTRACE_EVENT_SECCOMP to `seccomp_system_call'. (exec_init): Establish whether it is possible to enable seccomp.
2024-03-14* exec/trace.c (rpl_stpcpy): Replace stpcpy if absent.Po Lu
2024-03-14Improve /proc/self/exe substitution on AndroidPo Lu
* 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.
2024-01-27Intercept calls to `openat' under AndroidPo Lu
* 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.
2024-01-02; Add 2024 to copyright yearsPo Lu
2023-12-10; Fix typosStefan Kangas
2023-09-18Correct crash in child processes under armeabi AndroidPo Lu
* 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>.
2023-07-20Update Android portPo Lu
* exec/trace.c (handle_readlinkat): Adjust commentary to match behavior. * src/android.c (android_get_keysym_name): NULL terminate *name_return.
2023-05-20Remove arbitrary process count limitPo Lu
* 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 Lu
* 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 Lu
* exec/trace.c (SYS_SECCOMP): Define when not present.
2023-05-04Update Android portPo Lu
* 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 Lu
* 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 Lu
* 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.
2023-05-02Update Android portPo Lu
* 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.
2023-05-01Fix cwd relative process execution on AndroidPo Lu
* 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 Lu
* exec/trace.c (process_system_call): Save and restore x0, x1 and x2 regs after replacing them with an invalid file descriptor.
2023-04-30Add helper binary `exec1'Po Lu
* .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.
generated by cgit v1.3 (git 2.53.0) at 2026-07-01 02:06:26 +0000