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0aaa04d055
ARCH_ARM has selected ARCH_HAVE_VFORK only "if !BUILD_KERNEL" since the fork()/vfork() split. That condition was deliberate but temporary: it was added because the fork family had never worked on a 32-bit ARM kernel build -- the entry point in fork.S snapshots the kernel-side stub rather than the caller, so a child resumes at a kernel address -- and said in as many words that "arch/arm takes the condition off again in the patch that adds its saved-syscall-frame path". That patch is the one before this. arm_syscall() records the caller's exception frame in xcp.sregs and arm_fork() builds the child from it, so the condition has nothing left to protect against. Cortex-M is unaffected either way -- BUILD_KERNEL depends on ARCH_USE_MMU, which it does not have -- so the only configurations this changes are the MMU-capable ARM ports, which are exactly the ones the previous commit fixed. Verified on qemu-armv7a:knsh under qemu-system-arm: ostest's vfork_test passes, where before the change vfork() was absent. Assisted-by: Claude Code:claude-opus-5 Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com> |
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| avr | ||
| ceva | ||
| dummy | ||
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| mips | ||
| misoc | ||
| or1k | ||
| renesas | ||
| risc-v | ||
| sim | ||
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| tricore | ||
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| xtensa | ||
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| CMakeLists.txt | ||
| Kconfig | ||