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390c9ea0 | dchagin | May 15, 2022, 6:12 p.m. | linux(4): Add AT_MINSIGSTKSZ to arm64 port
MFC after: 2 weekscgit |
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c56480a8 | dchagin | May 15, 2022, 6:10 p.m. | linux(4): Implement signal trampoline for arm64 in a FreeBSD-way
The implemenation differs from others Linuxulators. For unwinders Linux ucontext_t is stored, however native machine context is used to store/restore process state to avoid code duplication. As DWARF Aarch64 does not define a register number for PC and provides no direct way to encode the PC of the previous frame, CFI cannot describe a signal trampoline frame. So, modified the vdso linker script to discard unused sections. Extensions are not implemented. MFC after: 2 weekscgit |
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08e201a3 | dchagin | May 15, 2022, 6:08 p.m. | linux(4): Retire unused include
MFC after: 2 weekscgit |
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8f9635dc | dchagin | May 15, 2022, 6:08 p.m. | linux(4): Retire handmade DWARF annotations from signal trampolines
The Linux exports __kernel_sigreturn and __kernel_rt_sigreturn from the vdso. Modern glibc's sigaction sets the sa_restorer field of sigaction to the corresponding vdso __sigreturn, and sets the SA_RESTORER. Our signal trampolines uses the FreeBSD-way to call a signal handler, so does not use the sigaction's sa_restorer. However, as glibc's runtime linker depends on the existment of the vdso __sigreturn symbols, for all Linuxulators was added separate trampolines named __sigcode with DWARF anotations and left separate __sigreturn methods, which are exported. MFC after: 2 weekscgit |
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6e826d27 | dchagin | May 15, 2022, 6:06 p.m. | linux(4): Better naming for ucontext field of struct rt_sigframe
To reduce sendsig code difference and to avoid confusing me, rename sf_sc to sf_uc to match the content. MFC after: 2 weekscgit |
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af557e64 | dchagin | May 15, 2022, 6:05 p.m. | linux(4): Rework the definition of struct siginfo to match Linux actual one
Rework the defintion of struct siginfo so that the array padding struct siginfo to SI_MAX_SIZE can be placed in a union along side of the rest of the struct siginfo members. The result is that we no longer need the __ARCH_SI_PREAMBLE_SIZE or SI_PAD_SIZE definitions. Move struct siginfo definition under /compat/linux to reduce MD part. To avoid headers polution include linux_siginfo.h in the MD linux.h MFC after: 2 weekscgit |
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21f24617 | dchagin | May 15, 2022, 6:03 p.m. | linux(4): Move sigframe definitions to separate headers
The signal trampoine-related definitions are used only in the MD part of code, wherefore moved from everywhere used linux.h to separate MD headers. MFC after: 2 weekscgit |
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ba279bcd | dchagin | May 15, 2022, 6 p.m. | linux(4): Cleanup signal trampolines
This is the first stage of a signal trampolines refactoring. From trampolines retired emulation of the 'call' instruction, which is replaced by direct call of a signal handler. The signal handler address is in the register. The previous trampoline implemenatation used semi-Linux-way to call a signal handler via the 'jmp' instruction. Wherefore the trampoline emulated a 'call' instruction to into the stack the return address for signal handler's 'ret' instruction. Wherefore handmade DWARD annotations was used. While here rephrased and removed excessive comments. MFC after: 2 weekscgit |
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0b5d5dc3 | dchagin | May 15, 2022, 5:58 p.m. | linux(4): Retire unneeded initialization
Both uc_flags and uc_link are zeroed above. On amd64 and i386 the uc_link field is not used at all. The UC_FP_XSTATE bit should be set in the uc_flags if OS xsave knob is turned on (and xsave is implemented). MFC after: 2 weekscgit |
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3bae1cd6 | dchagin | May 15, 2022, 5:49 p.m. | linux(4): Implement futex_op for arm64.
It's mostly modeled like the Linux does. Differential revision: https://reviews.freebsd.org/D35154 MFC after: 2 weekscgit |
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f210e4fb | tuexen | May 14, 2022, 6:30 a.m. | sctp: cleanup, no functional change intended
MFC after: 3 dayscgit |
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aab6e5bd | tuexen | May 14, 2022, 6:07 a.m. | sctp: improve path verification
Ensure that a HB can be sent faster than a HB.Interval when performing path verification of a reachable peer address. Thanks to Alexander Funke for finding the issue and proposing a fix. MFC after: 3 dayscgit |
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9312ba23 | tuexen | May 14, 2022, 6:05 a.m. | sctp: improve path verification
When sending path confirmation heartbeats, do not take HB.interval into account when the path is still reachable. Thanks to Alexander Funke for finding the issue and suggesting a fix. MFC after: 3 dayscgit |
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9b2a35b3 | tuexen | May 14, 2022, 4:28 a.m. | sctp: improve consistency
No functional change intended. MFC after: 3 dayscgit |
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0817c8dc | dim | May 14, 2022, 8:07 p.m. | Avoid adding -d to kernel module link command lines for lld >= 14
Since 0b3178a45cd0 we have added '-d' to the link command line for kernel modules, so if any unexpected common symbols turn up (even though we use -fno-common in CFLAGS), storage will be allocated in in the module itself. However, with lld this option did not have any effect since ~2017, and as of lld 14 it warns: "-d, -dc, -dp, and --[no-]define-common will be removed. See https://github.com/llvm/llvm-project/issues/53660" Add a linker type and version check, to avoid adding the option for lld 14 and later. Reported by: bz MFC after: 2 weekscgit |