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* Port recent Android changes to mips64elPo Lu2025-04-151-2/+12
| | | | | | | | | | | | | | | | | | | | | * 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'.
* Replace AT_EXECFN in auxiliary vectors of programs executed on AndroidPo Lu2025-04-131-0/+12
| | | | | | | | | | | | | | | | | | * 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.
* Merge from savannah/emacs-30Po Lu2025-02-091-14/+44
|\ | | | | | | 563efd6838c Fix program execution on Android 15 QPR2 Beta
| * Fix program execution on Android 15 QPR2 BetaPo Lu2025-02-091-14/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
| * Update copyright year to 2025Stefan Kangas2025-01-021-1/+1
| | | | | | | | Run "TZ=UTC0 admin/update-copyright".
* | Update copyright year to 2025Paul Eggert2025-01-011-1/+1
| | | | | | | | Run "TZ=UTC0 admin/update-copyright".
* | ; Fix typosStefan Kangas2024-11-211-1/+1
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* | Port seccomp acceleration to Linux 3.5.0Po Lu2024-07-021-22/+91
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* | ; * exec/trace.c (seccomp_system_call): Typo in commentary.Po Lu2024-07-011-2/+2
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* | Optimize process execution on AndroidPo Lu2024-07-011-186/+621
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* * exec/trace.c (rpl_stpcpy): Replace stpcpy if absent.Po Lu2024-03-141-0/+30
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* Improve /proc/self/exe substitution on AndroidPo Lu2024-03-141-10/+111
| | | | | | | | | | | | * 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.
* Intercept calls to `openat' under AndroidPo Lu2024-01-271-1/+134
| | | | | | | | | | | | * 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.
* ; Add 2024 to copyright yearsPo Lu2024-01-021-1/+1
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* ; Fix typosStefan Kangas2023-12-101-1/+1
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* Correct crash in child processes under armeabi AndroidPo Lu2023-09-181-8/+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>.
* Update Android portPo Lu2023-07-201-3/+3
| | | | | | | * exec/trace.c (handle_readlinkat): Adjust commentary to match behavior. * src/android.c (android_get_keysym_name): NULL terminate *name_return.
* Remove arbitrary process count limitPo Lu2023-05-201-0/+12
| | | | | | * exec/trace.c (handle_clone_prepare): (handle_clone): When !REENTRANT, use malloc to allocate tracees after running out of static ones.
* Fix execution of /proc/self/exe within child processesPo Lu2023-05-051-38/+149
| | | | | | | | | | | | | | * 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.
* Update Android portPo Lu2023-05-051-0/+4
| | | | * exec/trace.c (SYS_SECCOMP): Define when not present.
* Update Android portPo Lu2023-05-041-21/+97
| | | | | | * exec/trace.c (check_signal): New function. (handle_exec, process_system_call): Handle signal-delivery-stop while waiting synchronously for syscall completion.
* Update Android portPo Lu2023-05-031-0/+25
| | | | | | | | * 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.
* Update Android portPo Lu2023-05-031-1/+43
| | | | | | | | | * 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.
* Update Android portPo Lu2023-05-021-4/+164
| | | | | | | | | | | | | | * 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.
* Fix cwd relative process execution on AndroidPo Lu2023-05-011-14/+25
| | | | | | | | * 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.
* Fix syscall error reporting on aarch64Po Lu2023-05-011-1/+20
| | | | | | * exec/trace.c (process_system_call): Save and restore x0, x1 and x2 regs after replacing them with an invalid file descriptor.
* Add helper binary `exec1'Po Lu2023-04-301-0/+972
* .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 v1.2.1 (git 2.18.0) at 2026-01-15 13:08:35 +0000