Marco Casaroli 95c326704e arch/x86_64: Implement up_addrenv_fork() and provide POSIX fork(). ... Duplicate an address environment into freshly allocated pages mapped at the same virtual addresses, which is what POSIX fork() is built on. x86_64_fork_syscall() then lets the child run at the parent's stack addresses. A pointer to a stack local taken before fork() must name the same object in the child that it named in the parent, so the child adopts the parent's stack geometry rather than being given a relocated copy; the parent's stack is already in the duplicate, at the parent's address, with its contents. That shows up as a zero offset, which also means the copy would have the same source and destination, so both the copy and the frame-pointer relocation are skipped. Build-verified on qemu-intel64:knsh_romfs. NuttX on qemu-intel64 requires tsc-deadline and pcid, which TCG does not implement, so it cannot be run on this host. Assisted-by: Claude Code:claude-opus-5 Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>		2026-09-24 18:02:36 -03:00
..
image	docs/guides/bootsequence: Migrate UML diagram to PlantUML	2026-02-15 08:47:23 +01:00
porting-case-studies	!arch/arm: Use r9 as the PIC base register.	2026-08-06 01:38:23 +08:00
armv7m_runtimestackcheck.rst	style: Fix "the the" typo across the codebase.	2026-03-23 11:07:49 +01:00
automounter.rst
building_nuttx_with_app_out_of_src_tree.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
building_uclibcpp.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
changing_systemclockconfig.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
cpp_cmake.rst	Documentation/guides: Update CMake C++ guide	2025-09-15 15:30:15 -03:00
custom_app_directories.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
customapps.rst
customboards.rst	docs/guides/customboards: Mention special Kconfig settings	2026-06-18 21:51:48 +08:00
devicetree.rst	fdt: add fdt description document	2024-09-30 14:20:49 +08:00
drivers.rst
etcromfs.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
fork_vfork_migration.rst	arch/x86_64: Implement up_addrenv_fork() and provide POSIX fork().	2026-09-24 18:02:36 -03:00
fortify.rst	Doc: Fortify Instructions	2025-01-23 15:36:14 +08:00
fully_linked_elf.rst	docs: Update the ELF guides	2025-06-11 23:11:08 +08:00
include_files_board_h.rst	style: Fix "the the" typo across the codebase.	2026-03-23 11:07:49 +01:00
index.rst	!Documentation: Describe the fork()/vfork() split.	2026-08-10 08:57:30 -03:00
integrate_newlib.rst	style: fix typos	2025-04-30 13:45:46 +08:00
ipv6.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
kernel_threads_with_custom_stacks.rst	sched/task: fix Redundant memory allocation.	2026-01-01 07:25:04 -03:00
logging_rambuffer.rst	drivers/syslog: remove implement of syslog_putc()	2024-11-15 19:46:36 +08:00
lwl.rst	docs/guides/lwl: move lwl's README.txt to lwl.rst	2025-12-23 15:20:06 +01:00
multiple_nsh_sessions.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
nestedinterrupts.rst
nfs.rst
nix_flake.rst	tools/nix: move nix flakes to tools/	2025-08-28 10:04:01 +08:00
nsh_network_link_management.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
ofloader.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
optee.rst	drivers/misc/optee: Expanded RPC support.	2025-08-06 02:29:33 +08:00
partially_linked_elf.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
platform_directories.rst	style: fix typos	2025-04-30 13:45:46 +08:00
port.rst	style: fix typos	2025-04-30 13:45:46 +08:00
port_bootsequence.rst	docs/guides/bootsequence: Migrate UML diagram to PlantUML	2026-02-15 08:47:23 +01:00
port_drivers_to_stm32f7.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
port_relatedkernelconfigrations.rst	Documentation/guides: add the guide:how to port.	2024-12-12 21:52:24 +08:00
protected_build.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
pysimcoder.rst	Documentation: fix spelling	2025-05-15 11:33:41 +08:00
qemu_tips.rst	Documentation: add notes about TAP configuration for qemu	2025-12-18 11:39:54 -03:00
ram_rom_disks.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
reading_can_msgs.rst	nuttx/can: add message alignment	2025-11-24 14:11:41 +08:00
remove_device_drivers_nsh.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
renode.rst	!arch/stm32h7: use common STM32 Kconfig symbols	2026-06-14 11:35:31 -03:00
rndis.rst	style: fix typos	2025-04-30 13:45:46 +08:00
rust.rst	!sched/clock: remove CONFIG_SYSTEM_TIME64 and always use 64-bit time	2026-05-19 16:21:28 +08:00
semihosting.rst	doc: Add semihost syslog guide instructions	2025-10-24 09:56:24 +08:00
signal_events_interrupt_handlers.rst	Doc: Replace link from old wiki to new wiki in signaling events from int	2024-10-28 09:35:07 +08:00
signaling_sem_priority_inheritance.rst	Doc: Migration Signaling Semaphores and priority inheritance	2024-10-28 09:35:07 +08:00
simulator.rst	Documentation: add nxmodbus doc	2026-04-21 09:39:04 +08:00
smaller_vector_tables.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
specialstuff_in_nuttxheaderfiles.rst	Doc: Migrate Put special stuff in NuttX header files	2024-10-15 01:22:59 +08:00
stm32_ports.rst	arch/arm/stm32c0: Add USB device support	2026-09-14 18:32:23 -03:00
stm32ccm.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
stm32nullpointer.rst	style: Fix "the the" typo across the codebase.	2026-03-23 11:07:49 +01:00
testingtcpip.rst
thread_local_storage.rst	doc: Fix code blocks in thread_local_storage.rst	2024-08-03 21:15:05 +08:00
updating_release_system_elf.rst	Doc: improve and add documentations for the guide section of the wiki	2024-12-30 12:32:42 +08:00
usbtrace.rst	!boards: Remove NSH_ARCHINIT and board_app_initialize	2026-05-02 18:36:46 +08:00
usingkernelthreads.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00
versioning_and_task_names.rst	Documentation/Make: add implementation/make_build_system.rst	2025-11-20 09:39:16 -05:00
zerolatencyinterrupts.rst	!arch/stm32: move stm32l1 and finalize the directory split	2026-06-24 14:54:44 -03:00