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| author | Kir Kolyshkin <kolyshkin@gmail.com> | 2023-08-16 19:20:54 -0700 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2023-09-07 19:11:15 +0000 |
| commit | da7ee57f40069eda3488b2e51dfa878bdd5816af (patch) | |
| tree | d0830dc406737df376008d1ff52f684a66ed1039 /src/syscall/asm_linux_arm.s | |
| parent | 584d646559eb6c5942410f2ba2d2806f2627c2a2 (diff) | |
| download | go-da7ee57f40069eda3488b2e51dfa878bdd5816af.tar.xz | |
syscall: add support to get pidfd from ForkExec on Linux
Add PidFD support, so that if the PidFD pointer in SysProcAttr is not
nil, ForkExec (and thus all its users) obtains a pidfd from the kernel
during clone(), and writes the result (or -1, if the functionality
is not supported by the kernel) into *PidFD.
The functionality to get pidfd is implemented for both clone3 and clone.
For the latter, an extra argument to rawVforkSyscall is needed, thus the
change in asm files.
Add a trivial test case checking the obtained pidfd can be used to send
a signal to a process, using pidfd_send_signal. To test clone3 code path,
add a flag available to tests only.
Updates #51246.
Change-Id: I2212b69e1a657163c31b4a6245b076bc495777a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/520266
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com>
Diffstat (limited to 'src/syscall/asm_linux_arm.s')
| -rw-r--r-- | src/syscall/asm_linux_arm.s | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/syscall/asm_linux_arm.s b/src/syscall/asm_linux_arm.s index d3995416c2..06a35b55cb 100644 --- a/src/syscall/asm_linux_arm.s +++ b/src/syscall/asm_linux_arm.s @@ -41,25 +41,25 @@ okseek: BL runtime·exitsyscall(SB) RET -// func rawVforkSyscall(trap, a1, a2 uintptr) (r1, err uintptr) -TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-20 +// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr) +TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-24 MOVW trap+0(FP), R7 // syscall entry MOVW a1+4(FP), R0 MOVW a2+8(FP), R1 - MOVW $0, R2 + MOVW a3+12(FP), R2 SWI $0 MOVW $0xfffff001, R1 CMP R1, R0 BLS ok MOVW $-1, R1 - MOVW R1, r1+12(FP) + MOVW R1, r1+16(FP) RSB $0, R0, R0 - MOVW R0, err+16(FP) + MOVW R0, err+20(FP) RET ok: - MOVW R0, r1+12(FP) + MOVW R0, r1+16(FP) MOVW $0, R0 - MOVW R0, err+16(FP) + MOVW R0, err+20(FP) RET // func rawSyscallNoError(trap uintptr, a1, a2, a3 uintptr) (r1, r2 uintptr); |