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* Restructure argument setup in hashbangFlavio Cruz2024-09-081-48/+43
| | | | | | | | | | | | | | | We do a few things here: - Move search_path to the scope where it is used to make dependencies more clear. - Have a separate variable to store the file name we eventually need to free and move the free logic to happen in a single place. Both of this allows us to still free the name even if a fault is generated and also avoids a compiler warning as we try to assign a 'const char*' file_name_exec to a 'char *', making it more clear to what exactly we need to free. I also believe 'error' in line 245 was not initialized in case 'file_name_exec' is used and this fixes that too. Message-ID: <20240121210757.1900938-1-flaviocruz@gmail.com>
* Fix line-buffered stderrSamuel Thibault2024-08-251-0/+1
| | | | | mach_open_devstream creates a fully-buffered stream by default. This prevents from seeing various messages.
* Revert "exec: Stop relying on address space size"Samuel Thibault2024-03-231-1/+3
| | | | | | This reverts commit db46ea2eb9dc84959fbf9b1819facac3d6078ba1. This is making the hurd startup hang.
* exec: Add support for AArch64 executablesSergey Bugaev2024-03-231-0/+5
| | | | | | | | | This maps to EM_AARCH64. Just like the x86_64 branch, we only compile this code if CPU_TYPE_ARM64 is defined in Mach headers, to avoid raising Mach version requirement on other architectures; and we explicitly enable the branch when building for AArch64 itself, to get a build error if CPU_TYPE_ARM64 is somehow not defined. Message-ID: <20240323115322.69075-7-bugaevc@gmail.com>
* elfcore: Add support for saving AArch64 registersSergey Bugaev2024-03-231-0/+26
| | | | Message-ID: <20240323115322.69075-8-bugaevc@gmail.com>
* exec: Stop relying on address space sizeSergey Bugaev2024-03-231-3/+1
| | | | | | | The code here just wants to deallocate the whole address space, and Mach already contains the logic to limit the passed-in range to the vm_map's actual bounds (see VM_MAP_RANGE_CHECK). Message-ID: <20240323115322.69075-6-bugaevc@gmail.com>
* exec: Fix creating executable stacksSergey Bugaev2024-03-231-4/+5
| | | | | | | | | | | | | | | | The previous logic had two independent issues: * We need to make the stack executable if either the program or its ELF interpreter requires executable stack. In practice, it's common for the program itself to not require executable stack, but ld.so (glibc) needs it. * mach_setup_thread () allocates stacks with a simple vm_allocate (), which creates non-executable memory. So if an executable stack is required, the stack has to be vm_protect'ed to enable execution, not the other way around. As the comment suggest, it would've been better to use vm_map () with the desired protection directly. Message-ID: <20240323115322.69075-2-bugaevc@gmail.com>
* Replace deprecated sigmask with sigset_t callsFlavio Cruz2023-12-291-2/+7
| | | | Message-ID: <20231229161211.312389-2-flaviocruz@gmail.com>
* exec: TODO note about implementing interruptSamuel Thibault2023-11-201-0/+4
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* Get rid of u_int in RPCsSamuel Thibault2023-08-082-15/+15
| | | | To get mach_msg_type_number_t everywhere
* exec: Get rid of u_intSamuel Thibault2023-08-081-1/+1
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* exec: Properly preallocate address spaceSergey Bugaev2023-07-031-101/+67
| | | | | | | | | | | | | | | The existing code mapped the first PT_LOAD segment using anywhere=1, letting Mach pick an arbitrary location, and then uses anywhere=0 for all the remaining segments to place them next to the first one, as expected by the program. This, however, runs into many issues, primarily because of conflicts between interpreter and executable mappings. Some of those the existing code tried to work around. Instead, do it the way it's implemented in glibc: calculate upfront how much space the overall mapping will need, and ask Mach to preallocate this much address space. Then we deallocate it back, and instead map the program segments onto this very same place. Message-Id: <20230625231137.403096-4-bugaevc@gmail.com>
* exec: On 64-bit, map lower 4 GB inaccessible for PIEsSergey Bugaev2023-07-031-1/+14
| | | | | | | | | | We want to map the whole lower 4 GB of address space inaccessible to catch accidental pointer truncation. We can only do this when the executable (as well as the interpreter, if any) is compiled as PIC/PIE, since otherwise we would violate the ABI requirement. Fortunately most distributions have already switched to using PIE by default, so this should not be an issue. Message-Id: <20230625231137.403096-3-bugaevc@gmail.com>
* exec: Allow loading x86_64 executables on x86_64Sergey Bugaev2023-05-152-1/+16
| | | | | | | | | Since we don't support mixing i386 and x86_64 binaries on the same system (as running them requires different build-time gnumach configurations), the exec server can simply require the binary being loaded to have been built for the same architecture as the exec server itself. Message-Id: <20230515073600.1350072-1-bugaevc@gmail.com>
* elfcore: Add support for saving x86_64 registersSergey Bugaev2023-05-101-1/+71
| | | | Message-Id: <20230508213136.608575-21-bugaevc@gmail.com>
* exec: Port to x86_64Sergey Bugaev2023-05-102-5/+5
| | | | Message-Id: <20230508213136.608575-20-bugaevc@gmail.com>
* Use uintptr_t for message payloads.Flavio Cruz2023-05-021-1/+1
| | | | | A follow up to 92fad38a043b75ed6b435b3efa574ede91dbe9ee in gnumach. Message-Id: <ZFCNasf9bJ9qj+CG@jupiter.tail36e24.ts.net>
* Fix *printf specifier for user space mach ports.Flavio Cruz2022-12-061-1/+1
| | | | | mach_port_t are mach_port_name_t and thus require %u instead of %lu. Message-Id: <Y42RELMbulK4xaKM@reue>
* Rename proc_complete_reauthentication to proc_reauthenticate_completeSamuel Thibault2022-08-101-1/+1
| | | | For coherency with the existing RPCs
* Make proc_reauthenticate () recreate proc portSergey Bugaev2022-08-101-0/+7
| | | | And add proc_complete_reauthentication ()
* exec: Use proc_reauthenticate_reassign ()Sergey Bugaev2022-08-101-42/+33
| | | | | This lets the exec server atomically replace the old task with the new task while raising its privileges.
* exec: Support ELIBEXEC errorSamuel Thibault2022-04-121-0/+7
| | | | | So users get a "Cannot exec a shared library directly" error message instead of a segfault.
* Fix const warningsSamuel Thibault2022-01-173-20/+22
| | | | | Now that the RPCs have const, this forces us cleaning our const-meant functions.
* Make RPC input array parameters constSamuel Thibault2022-01-161-18/+18
| | | | | This follows mig's cf4bcc3f1435 ("Also add const qualifiers on server side")
* Fix build warningsSamuel Thibault2022-01-011-2/+2
| | | | No actual behavior change.
* exec: only constraint loading the ELF interpreterSamuel Thibault2021-12-301-7/+7
| | | | | PIE programs do not need bitmask constraints, only the ELF interpreter needs to leave room for a non-PIE program.
* exec: Fix and use mask for memory layoutSamuel Thibault2021-08-161-20/+7
| | | | | | | Gnumach's 0650a4ee30e3 implements support for high bits being set in the mask parameter of vm_map. This allowed to remove the rmh kludge in the dynamic linker. Exec now can and should use the mask for excluding parts of the memory layout.
* Fix references to startup in commentsSamuel Thibault2020-07-251-1/+1
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* Fix build with -fno-commonSamuel Thibault2020-03-312-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | which will be the default in gcc-10. * acpi/acpifs.h (fs, acpifs_maptime): Add extern qualifier. * boot/private.h (verbose): Likewise. * eth-multiplexer/netfs_impl.h (multiplexer_maptime): Likewise. * eth-multiplexer/vdev.h (port_bucket, vdev_portclass): Likewise. * exec/priv.h (port_bucket, execboot_portclass): Likewise. * ext2fs/ext2fs.h (sblock, sblock_dirty, block_size, log2_block_size, log2_dev_blocks_per_fs_block, log2_stat_blocks_per_fs_block, zeroblock, frag_size, frags_per_block, inodes_per_block, itb_per_group, db_per_group, desc_per_block, addr_per_block, groups_count, node_to_page_lock, generation_lock, next_generation, group_desc_image, global_pokel, modified_global_blocks, use_xattr_translator_records): Likewise. * hostmux/hostmux.h (hostmux_maptime): Likewise. * isofs/isofs.h (host_name, mounted_on, disk_image, disk_image_len, logical_block_size, sblock): Likewise. * libdiskfs/diskfs.h (diskfs_shortcut_symlink, diskfs_shortcut_chrdev, diskfs_shortcut_blkdev, diskfs_shortcut_fifo, diskfs_shortcut_ifsock, diskfs_create_symlink_hook, diskfs_read_symlink_hook): Likewise. * libnetfs/callbacks.h (_netfs_translator_callback1, _netfs_translator_callback2): Likewise. * libnetfs/priv.h (netfs_mtime): Likewise. * libpager/priv.h (_pager_class): Likewise. * libtrivfs/trivfs.h (trivfs_check_access_hook, trivfs_check_open_hook, trivfs_open_hook, trivfs_protid_create_hook, trivfs_peropen_create_hook, trivfs_protid_destroy_hook, trivfs_peropen_destroy_hook, trivfs_getroot_hook): Likewise. * lwip/lwip-hurd.h (lwip_bucket, socketport_class, addrport_class, shutdown_notify_class, lwip_protid_portclasses, lwip_cntl_portclasses, lwip_bootstrap_portclass, fsys_identity, lwipcntl, lwip_owner, lwip_group): Likewise. * lwip/port/include/netif/hurdtunif.h (tunnel_cntlclass, tunnel_class): Likewise. * nfs/nfs.h (main_udp_socket, hostname, mapped_time): Likewise. * nfsd/nfsd.h (mapped_time, authserver): Likewise. * pci-arbiter/pcifs.h (fs, pcifs_maptime): Likewise. * pci-arbiter/startup.h (pci_shutdown_notify_class, arrange_shutdown_notification): Likewise. * pfinet/pfinet.h (pfinet_bucket, addrport_class, socketport_class, fsys_identity, pfinetctl, pfinet_owner, pfinet_group): Likewise. * pflocal/sserver.h (sock_port_bucket): Likewise. * proc/proc.h (authserver, self_proc, init_proc, startup_proc, proc_bucket, proc_class, generic_port_class, exc_class, generic_port, kernel_proc, global_lock): Likewise. * term/term.h (termstate, termflags, global_lock, carrier_alert, select_alert, pty_select_alert, term_bucket, tty_cntl_class, tty_class, cttyid_class, pty_class, pty_cntl_class, termctl, ptyctl, inputq, rawq, outputq, remote_input_mode, external_processing, term_owner, term_group, term_mode, bottom): Likewise. * usermux/usermux.h (usermux_maptime): Likewise. * utils/msgids.h (msgid_argp): Likewise. * libdiskfs/priv.h (_diskfs_mtime): Remove definition. * lwip/options.h (lwip_argp): Add prototype. * mach-defpager/priv.h (partitions): Name structure. (all_partitions): Add extern qualifier. * acpi/main.c (acpifs_maptime, fs): New variables. * exec/main.c (port_bucket, execboot_portclass): Likewise. * ext2fs/ext2fs.c (sblock, sblock_dirty, block_size, log2_block_size, log2_dev_blocks_per_fs_block, log2_stat_blocks_per_fs_block, frag_size, frags_per_block, inodes_per_block, itb_per_group, db_per_group, desc_per_block, addr_per_block, groups_count, next_generation, group_desc_image, global_pokel, use_xattr_translator_records): Likewise. * isofs/main.c (host_name, mounted_on, logical_block_size, sblock): Likewise. * libpager/pager-create.c (_pager_class): Likewise. * lwip/port/netif/hurdtunif.c (tunnel_cntlclass, tunnel_class): Likewise. * mach-defpager/default_pager.c (all_partitions): Likewise. * nfs/main.c (main_udp_socket, hostname, mapped_time): Likewise. * nfsd/main.c (mapped_time, authserver): Likewise. * pci-arbiter/main.c (fs, pcifs_maptime): Likewise. * pci-arbiter/startup.c (*pci_shutdown_notify_class): Likewise. * pfinet/main.c (pfinetctl, pfinet_owner, pfinet_group, pfinet_bucket, addrport_class, socketport_class, fsys_identity): Likewise. * proc/main.c (authserver, self_proc, init_proc, startup_proc, proc_bucket, proc_class, generic_port_class, exc_class, generic_port, kernel_proc, global_lock): Likewise. * term/main.c (termstate, termflags, global_lock, carrier_alert, select_alert, pty_select_alert, term_bucket, tty_cntl_class, tty_class, cttyid_class, pty_class, pty_cntl_class, termctl, ptyctl, outputq, remote_input_mode, external_processing, term_owner, term_group, term_mode, bottom): Likewise. * usermux/usermux.c (usermux_mapped_time): Rename to usermux_maptime. * lwip/main.c: Include "options.h". (lwip_argp, netif_list): Remove declarations. (lwip_bucket, socketport_class, addrport_class, shutdown_notify_class, lwip_cntl_portclasses, lwip_bootstrap_portclass, lwip_owner, lwip_group, fsys_identity, lwipcntl): New variables. * eth-multiplexer/multiplexer.c (multiplexer_maptime): Add variable. * hostmux/hostmux.c (hostmux_mapped_time): Rename variable to hostmux_maptime * libdiskfs/extra-version.c: Rename file to... * libdiskfs/priv.c: ... new file. (diskfs_shortcut_symlink, diskfs_shortcut_chrdev, diskfs_shortcut_blkdev, diskfs_shortcut_fifo, diskfs_shortcut_ifsock, diskfs_create_symlink_hook, diskfs_read_symlink_hook): Add weak variables. * libdiskfs/Makefile (OTHERSRCS): Replace extra-version.c with priv.c. * libtrivfs/priv.c: New file. * libtrivfs/Makefile (OTHERSRCS): Add priv.c * libcons/extra-version.c: Rename file to... * libcons/priv.c: ... new file. * libcons/Makefile (SRCS): Replace extra-version.c with priv.c. Fix build with #
* Use the data_t type defined in hurd_types.h.Flavio Cruz2019-09-011-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * boot/boot.c: Replace char* with data_t. * console-client/trans.c: Likewise. * exec/exec.c: Likewise. * ext2fs/storeinfo.c: Likewise. * fatfs/inode.c: Likewise. * fatfs/main.c: Likewise. * isofs/inode.c: Likewise. * libdiskfs/boot-start.c: Likewise. * libdiskfs/dir-readdir.c: Likewise. * libdiskfs/file-exec.c: Likewise. * libdiskfs/file-get-fs-opts.c: Likewise. * libdiskfs/file-get-trans.c: Likewise. * libdiskfs/file-getfh.c: Likewise. * libdiskfs/file-set-trans.c: Likewise. * libdiskfs/fsys-forward.c: Likewise. * libdiskfs/fsys-getfile.c: Likewise. * libdiskfs/fsys-options.c: Likewise. * libdiskfs/io-read.c: Likewise. * libdiskfs/io-write.c: Likewise. * libnetfs/dir-readdir.c: Likewise. * libnetfs/file-exec.c: Likewise. * libnetfs/file-get-fs-options.c: Likewise. * libnetfs/file-get-storage-info.c: Likewise. * libnetfs/file-get-translator.c: Likewise. * libnetfs/file-set-translator.c: Likewise. * libnetfs/fsstubs.c: Likewise. * libnetfs/fsys-get-options.c: Likewise. * libnetfs/fsys-set-options.c: Likewise. * libnetfs/fsysstubs.c: Likewise. * libnetfs/io-read.c: Likewise. * libnetfs/io-write.c: Likewise. * libtrivfs/dir-readdir.c: Likewise. * libtrivfs/file-get-fs-options.c: Likewise. * libtrivfs/file-get-storage-info.c: Likewise. * libtrivfs/file-get-trans.c: Likewise. * libtrivfs/file-getfh.c: Likewise. * libtrivfs/file-set-trans.c: Likewise. * libtrivfs/fsys-forward.c: Likewise. * libtrivfs/fsys-get-options.c: Likewise. * libtrivfs/fsys-set-options.c: Likewise. * libtrivfs/fsys-stubs.c: Likewise. * libtrivfs/io-read.c: Likewise. * libtrivfs/io-write.c: Likewise. * pfinet/io-ops.c: Likewise. * pfinet/pfinet-ops.c: Likewise. * pfinet/socket-ops.c: Likewise. * pfinet/tunnel.c: Likewise. * pflocal/io.c: Likewise. * pflocal/pf.c: Likewise. * pflocal/socket.c: Likewise. * proc/info.c: Likewise. * startup/startup.c: Likewise. * storeio/io.c: Likewise. * term/users.c: Likewise. * tmpfs/node.c: Likewise. * trans/crash.c: Likewise. * trans/fakeroot.c: Likewise. * trans/fifo.c: Likewise. * trans/firmlink.c: Likewise. * trans/hello-mt.c: Likewise. * trans/hello.c: Likewise. * trans/mtab.c: Likewise. * trans/new-fifo.c: Likewise. * trans/null.c: Likewise. * trans/proxy-defpager.c: Likewise. * trans/streamio.c: Likewise.
* exec: Leave room for mmaps etc. before PIE binariesSamuel Thibault2018-04-221-0/+3
| | | | | | | | otherwise there might not even be enough room to run RPCs during rtld bootstrap. * exec/exec.c (do_exec): Add 128MiB to anywhere_start before loading program.
* exec: Fix else branchSamuel Thibault2018-04-221-19/+21
| | | | | | | which happened to have no nefarious consequences by luck. * exec/exec.c (load_section): Add braces around commented code to fix else branch.
* exec: document why mask code is currently commentedSamuel Thibault2018-04-221-0/+5
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* Fix warningsSamuel Thibault2018-03-052-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * libdiskfs/boot-start.c (diskfs_start_bootstrap): Fix printf format. * libfshelp/delegate.c: Include <alloca.h> and <stdlib.h>. * libfshelp/start-translator-long.c: Include <stdlib.h>. * libshouldbeinlibc/ugids-verify-auth.c (server_verify_make_auth): Fix prototypes for password_check_group and password_check_user. * libstore/argp.c: Include <stdlib.h>. * libstore/task.c: Include <stdlib.h>. * exec/exec.c: Include <mach/vm_param.h>. * libbpf/bpf_impl.c: Include <stdlib.h>. * proc/info.c (S_proc_getloginpids): Remove local variables leader_task and leader_sub. * proc/main.c (main): Remove local variable original_argv. * boot/boot.c (task_died, S_mach_notify_new_task): Fix printf format. * exec/elfcore.c: Include <alloca.h> and <mach/vm_param.h>. * trans/crash.c: Include <hurd/msg.h>. * trans/random.c: Include <signal.h>. * utils/login.c: Include <signal.h>. * utils/id.c: Include <hurd/msg.h>. * utils/devprobe.c: Include <stdlib.h>. * utils/addauth.c: Include <hurd/msg.h>. * utils/frobauth-mod.c: Include <hurd/msg.h>. * utils/storeread.c: Include <stdlib.h>. * utils/msgport.c: Include <hurd/msg.h>. * sutils/clookup.c (file_name_lookup_carefully): Fix lookup function prototype, make head and tail const. * utils/rpcscan.c: Include <stdlib.h>. * sutils/bless.c: Include <stdlib.h>. * fstests/fstests.c: Include <stdlib.h>. * startup/startup.c (argz_task_insert_right): Fix printf format. * init/init.c: Include <stdlib.h>.
* Implement /proc/<pid>/exeSamuel Thibault2018-01-081-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | by adding proc_set/get_exe to the proc server, making exec call proc_set_exe, and libps call proc_get_exe. procfs can then just retrieve the information to make the "exe" symlink. * hurd/process.defs (proc_set_exe, proc_get_exe): New RPCs. * hurd/process_request.defs: Likewise. * hurd/process_reply.defs: Add skips for proc_set_exe and proc_get_exe RPCs. * proc/proc.h (struct proc): Add `exe' field. * proc/info.c (S_proc_set_exe, S_proc_get_exe): New functions. * proc/mgt.c (process_has_exited): Free p->exe. (S_proc_child): Duplicate parent `exe' into child's `exe'. * exec/exec.c (do_exec): Call proc_set_exe when a filename is available. * libps/ps.h (struct proc_stat): Add `exe_vm_alloced', `exe', and `exe_len' field. (PSTAT_EXE): New macro. (PSTAT_USER_BASE): Change value to make room. (proc_stat_exe, proc_stat_exe_len): New macros. * libps/procstat.c (proc_stat_set_flags): Handle PSTAT_EXE case by calling proc_get_exe. * libps/spec.c (ps_get_exe): New function. (ps_exe_getter): New structure. (ps_fmt_spec): Add "Exe" specification. * procfs/process.c (process_file_symlink_make_node, process_file_gc_exe): New functions. (procfs_dir_entry): Add "exe" entry. * startup/startup.c (launch_core_servers): Set exe paths for startup, auth, proc, and fs servers. (frob_kernel_process): Set exe path for kernel task. (S_startup_essential_task): Set exe path for exec server.
* Add support for $ORIGIN rpath expansionSamuel Thibault2018-01-081-4/+83
| | | | | * exec/exec.c (do_exec): When abspath is absolute, record its dirname into the LD_ORIGIN_PATH environment variable.
* Fix exec_paths through fakeroot or chrootJustus Winter2018-01-081-42/+51
| | | | | | | | | | | | | | | | | | | | | | If file_name_exec is not given, check_hashbang will try to locate the file. If argv[0] contains a '/', the file path is assumed to be absolute and it will try to open the file. Otherwise, the file is searched in the PATH. In either case, the resulting file identity port is compared to the identity port of the original file handle passed to check_hashbang. exec_paths_exec.patch explicitly provides the script files path in file_name_exec. According to the comment, if this path is provided, it is assumed to be the path to the script file and no attempt at locating the script file is done. However, the identity ports are still compared. This cannot succeed if fakeroot or chroot is used, because the process doing the exec and thus the initial file lookup is running in the chrooted environment, while the exec server is not. Fix this by skipping the identity test if file_name_exec is provided. * exec/hashexec.c (check_hashbang): Skip the file identity test if the file_name_exec is provided.
* Add a file_exec_file_name RPCEmilio Pozuelo Monfort2018-01-081-9/+25
| | | | | | | | | | | | | | | | | | | | | | * hurd/fs.defs (file_exec): Deprecate in favor of... (file_exec_paths): ...this new RPC. * TODO: Update. * doc/hurd.texi: Update RPC name. * hurd/hurd_types.h: Update RPC name. * libdiskfs/boot-start.c: Update RPC name. * configure.ac: Check for presence of RPC stubs file_exec_paths exec_exec_paths. * exec/hashexec.c (check_hashbang): When file_exec_paths is available, use it instead of file_exec. * startup/startup.c (run, run_for_real, start_child): Likewise. * utils/login.c (main): Likewise. * libfshelp/start-translator-long.c (fshelp_start_translator_long): Likewise. * libdiskfs/file-exec.c (diskfs_S_file_exec): Move code to new function diskfs_S_file_exec_paths and call it. (diskfs_S_file_exec_paths): New function, use exec_exec_paths when available instead of exec_exec * libnetfs/file-exec.c (netfs_S_file_exec, netfs_S_file_exec_paths): Likewise. * trans/fakeroot.c (netfs_S_file_exec, netfs_S_file_exec_paths): Likewise. * libtrivfs/file-exec.c (trivfs_S_file_exec_paths): New function.
* Add a new exec_exec_paths RPCEmilio Pozuelo Monfort2018-01-083-11/+62
| | | | | | | | | | | | * hurd/exec.defs (exec_exec): Label as deprecated. (exec_exec_paths): New RPC. * doc/hurd.texi: Update accordingly. * exec/hashexec.c (check_hashbang): Add file_name_exec argument. Don't guess the file name if file_name_exec is set. * exec/priv.h (check_hashbang): Add path argument. * exec/exec.c (S_exec_exec): Label as deprecated. (S_exec_exec_paths): New function. (do_exec): Add path and abspath arguments, pass path to check_hashbang.
* Record executable entry for PIE core dumpsSamuel Thibault2017-12-112-0/+18
| | | | | | | | | | | | * hurd/process.defs (proc_set_entry, proc_get_entry): New RPCs. * hurd/process_reply.defs: Add skips for proc_set_entry, proc_get_entry. * hurd/process_request.defs: Likewise. * exec/exec.c (do_exec): Call proc_set_entry. * proc/proc.h (proc): Add p_entry field. * proc/mgt.c (S_proc_set_entry, S_proc_get_entry): New RPC implementations. * exec/elfcore.c (dump_core): Add at_entry note, call proc_get_entry to get it, and write it with WRITE_NOTE.
* exec: Avoid calling mmap with zero sizeSamuel Thibault2017-09-101-0/+2
| | | | | | mmap is supposed to return an error on passing a zero size. * exec/exec.c (servercopy): Immediately return NULL if argsize is 0.
* Replace bcopy with memcpy or memmove as appropriate.Justus Winter2017-08-051-1/+1
| | | | | | | | | | | * boot/boot.c: Replace bcopy with memcpy or memmove as appropriate. * exec/hashexec.c: Likewise. * libps/proclist.c: Likewise, but also fix the amount of data copied. * libps/procstat.c: Likewise. * libps/spec.c: Likewise. * libshouldbeinlibc/cacheq.c: Likewise. * libshouldbeinlibc/idvec.c: Likewise. * libshouldbeinlibc/timefmt.c: Likewise.
* Use our own variant of 'assert' and 'assert_perror'.Justus Winter2017-08-055-17/+17
| | | | | Our variants print stack traces on failures. This will make locating errors much easier.
* exec: Fix loading binaries without a memory manager objectBrent W. Baccala2016-08-311-7/+8
| | | | | | | | | | Falling back from the io_map method needs to handle the "anywhere" flag too by updating MAPSTART. * exec/exec.c (write_to_task): Turn MAPSTART parameter into a reference to the address. Fix usage accordingly. (load_section): Pass address of MAPSTART to write_to_task so it can update it.
* Fix exec crash when setexecdata has never been calledSamuel Thibault2016-08-281-5/+7
| | | | | | | | | or called with a small array. This notably happens when using a sub-exec, see BZ #48919. * exec/hashexec.c (check_hashbang): Check std_nports before accessing std_ports.
* Fix loading small pic programsSamuel Thibault2016-08-261-15/+42
| | | | | | | | | | | | | | | It happens that the link script for ld.so contains a hole, which might thus leave an empty page between the text and the data. When loading a small pic program, its text would then fit in there, and loading the data right after it would fail. We here rather force all pic loads to be mapped contiguously, starting from the place that was allocated for the first pic load. * exec/exec.c (load_section): Return the address of the end of the section. (load): Take the address to be used for loading pic objects as parameter, force pic objects there if it is not zero, and compute and return the address to be used for the next pic object. (do_exec): Pass addresses for pic loads between calls to load().
* Revert part of "fix compiler warnings in hurd/exec"Thomas Schwinge2016-05-231-2/+2
| | | | | | | | | This reverts part of commit 05c3ffac543052c8d0b171a5f77bb977d5316a61. These type casts are no longer needed after the commit e914bfc3d6e5ddf6f8c5e93a4334873a48a24ddf changes. * exec/elfcore.c: Revert type casts added in commit 05c3ffac543052c8d0b171a5f77bb977d5316a61.
* exec: remove duplicate function callEsa Peuha2016-02-041-5/+0
| | | | | * exec/main.c (main) Remove second call to trivfs_startup from commit a5d384c.
* Fix typoSamuel Thibault2016-01-191-1/+1
| | | | * exec/Makefile (targets): Rename to target.
* Also build exec.staticSamuel Thibault2016-01-171-2/+1
| | | | | | Which can be more convenient than using ld.so to boot the Hurd * exec/Makefile (targets): Add exec.static
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