kernel/arch/xtensa/include/asm/ptrace.h, branch linux-rolling-stable

Merge tag 'xtensa-20250808' of https://github.com/jcmvbkbc/linux-xtensa

2025-08-09T04:35:03Z

Pull xtensa update from Max Filippov: - replace __ASSEMBLY__ with __ASSEMBLER__ in arch headers * tag 'xtensa-20250808' of https://github.com/jcmvbkbc/linux-xtensa: xtensa: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers xtensa: Replace __ASSEMBLY__ with __ASSEMBLER__ in uapi headers

xtensa: Replace ASSEMBLY with ASSEMBLER in non-uapi headers

2025-06-06T08:03:35Z

While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: Chris Zankel Cc: Max Filippov Signed-off-by: Thomas Huth Message-Id: <20250314071013.1575167-40-thuth@redhat.com> Signed-off-by: Max Filippov

xtensa: ptrace: Remove zero-length alignment array

2025-02-19T17:06:37Z

Use a compiler attribute to align the areg field to 16 bytes instead of using a zero-length alignment array. Signed-off-by: Thorsten Blum Message-Id: <20250219114759.20110-2-thorsten.blum@linux.dev> Signed-off-by: Max Filippov

xtensa: fix MAKE_PC_FROM_RA second argument

2024-04-03T02:42:35Z

Xtensa has two-argument MAKE_PC_FROM_RA macro to convert a0 to an actual return address because when windowed ABI is used call{,x}{4,8,12} opcodes stuff encoded window size into the top 2 bits of the register that becomes a return address in the called function. Second argument of that macro is supposed to be an address having these 2 topmost bits set correctly, but the comment suggested that that could be the stack address. However the stack doesn't have to be in the same 1GByte region as the code, especially in noMMU XIP configurations. Fix the comment and use either _text or regs->pc as the second argument for the MAKE_PC_FROM_RA macro. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov

xtensa: ptrace: add prototypes to

2023-09-20T12:03:19Z

Add prototype for do_syscall_trace_enter() to asm/ptrace.h. Move prototype for do_syscall_trace_leave() there to be consistent. Fixes a build warning: arch/xtensa/kernel/ptrace.c:545:5: warning: no previous prototype for 'do_syscall_trace_enter' [-Wmissing-prototypes] 545 | int do_syscall_trace_enter(struct pt_regs *regs) Signed-off-by: Randy Dunlap Cc: Chris Zankel Cc: Max Filippov Message-Id: <20230920052139.10570-5-rdunlap@infradead.org> Signed-off-by: Max Filippov

xtensa: use XCHAL_NUM_AREGS as pt_regs::areg size

2022-03-07T20:02:54Z

struct pt_regs is used to access both kernel and user exception frames. User exception frames may contain up to XCHAL_NUM_AREG registers that task creation and signal delivery code may access, but pt_regs::areg array has only 16 entries that cover only the kernel exception frame. This results in the following build error: arch/xtensa/kernel/process.c: In function 'copy_thread': arch/xtensa/kernel/process.c:262:52: error: array subscript 53 is above array bounds of 'long unsigned int[16]' [-Werror=array-bounds] 262 | put_user(regs->areg[caller_ars+1], Change struct pt_regs::areg size to XCHAL_NUM_AREGS so that it covers the whole user exception frame. Adjust task_pt_regs and drop additional register copying code from copy_thread now that the whole user exception stack frame is copied. Reported-by: Kees Cook Signed-off-by: Max Filippov Reviewed-by: Kees Cook

xtensa: replace variant/core.h with asm/core.h

2019-05-07T00:48:55Z

Introduce the header arch/xtensa/include/asm/core.h that provides definitions for XCHAL macros missing in older xtensa releases. Use this header instead of variant/core.h Signed-off-by: Max Filippov

xtensa: implement syscall tracepoints

2018-12-17T21:50:25Z

Add TIF_SYSCALL_TRACEPOINT flag definition; add _TIF_SYSCALL_TRACEPOINT to _TIF_WORK_MASK. Call trace_sys_enter from do_syscall_trace_enter and trace_sys_exit from do_syscall_trace_leave when TIF_SYSCALL_TRACEPOINT flag is set. Add declaration of sys_call_table to arch/xtensa/include/asm/syscall.h Add definition of NR_syscalls to arch/xtensa/include/asm/unistd.h Select HAVE_SYSCALL_TRACEPOINTS. This change allows tracing each syscall entry and exit through the ftrace mechanism. Signed-off-by: Max Filippov

xtensa: use NO_SYSCALL instead of -1

2018-12-17T21:48:21Z

For the sake of clarity define macro NO_SYSCALL and use it for setting/checking struct pt_regs::syscall field. Signed-off-by: Max Filippov

xtensa: clean up exception handling structure

2017-12-17T06:37:09Z

Instead of using flat array of longs use normal C structure and generate EXC_TABLE_* constants in the asm-offsets.c Signed-off-by: Max Filippov