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8dd039a6fc
Ilya Leoshkevich says: ==================== libbpf now has macros to access syscall arguments in an architecture-agnostic manner, but unfortunately they have a number of issues on non-Intel arches, which this series aims to fix. v1: https://lore.kernel.org/bpf/20220201234200.1836443-1-iii@linux.ibm.com/ v1 -> v2: * Put orig_gpr2 in place of args[1] on s390 (Vasily). * Fix arm64, powerpc and riscv (Heiko). v2: https://lore.kernel.org/bpf/20220204041955.1958263-1-iii@linux.ibm.com/ v2 -> v3: * Undo args[1] change (Andrii). * Rename PT_REGS_SYSCALL to PT_REGS_SYSCALL_REGS (Andrii). * Split the riscv patch (Andrii). v3: https://lore.kernel.org/bpf/20220204145018.1983773-1-iii@linux.ibm.com/ v3 -> v4: * Undo arm64's and s390's user_pt_regs changes. * Use struct pt_regs when vmlinux.h is available (Andrii). * Use offsetofend for accessing orig_gpr2 and orig_x0 (Andrii). * Move libbpf's copy of offsetofend to a new header. * Fix riscv's __PT_FP_REG. * Use PT_REGS_SYSCALL_REGS in test_probe_user.c. * Test bpf_syscall_macro with userspace headers. * Use Naveen's suggestions and code in patches 5 and 6. * Add warnings to arm64's and s390's ptrace.h (Andrii). v4: https://lore.kernel.org/bpf/20220208051635.2160304-1-iii@linux.ibm.com/ v4 -> v5: * Go back to v3. * Do not touch arch headers. * Use CO-RE struct flavors to access orig_x0 and orig_gpr2. * Fail compilation if non-CO-RE macros are used to access the first syscall parameter on arm64 and s390. * Fix accessing frame pointer on riscv. ==================== Signed-off-by: Andrii Nakryiko <andrii@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.