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

xtensa: add FDPIC and static PIE support for noMMU

2022-09-14T01:28:00Z

Define ELFOSABI_XTENSA_FDPIC and use it as an OSABI tag in the ELF header to distinguish FDPIC ELF files from regular ELF files. Define ELF_FDPIC_PLAT_INIT and put executable map, interpreter map and executable dynamic section addresses into registers a4..a6. Update start_thread macro to preserve register values in the current register window. Add definitions for PTRACE_GETFDPIC, PTRACE_GETFDPIC_EXEC and PTRACE_GETFDPIC_INTERP. Signed-off-by: Max Filippov

xtensa: clean up ELF_PLAT_INIT macro

2022-09-14T01:21:56Z

Wrap _r in parentheses in the macro body. Signed-off-by: Max Filippov

xtensa: enable CORE_DUMP_USE_REGSET

2018-12-17T21:48:22Z

Drop xtensa_elf_core_copy_regs function, ELF_CORE_COPY_REGS macro, and dump_fpu function. Define CORE_DUMP_USE_REGSET to make ELF core dumper use regset interface. Signed-off-by: Max Filippov

xtensa: implement task_user_regset_view

2018-12-17T21:48:21Z

- define struct user_pt_regs in the arch/xtensa/include/uapi/asm/ptrace.h with the same layout as xtensa_gregset_t; make xtensa_gregset_t a typedef; - define REGSET_GPR regset, implement register get and set functions; - define task_user_regset_view function and expose REGSET_GPR. Signed-off-by: Max Filippov

Move EM_XTENSA to uapi/linux/elf-em.h

2018-12-17T21:46:02Z

This should never have been defined in the arch tree to begin with, and now uapi/linux/audit.h header is going to use EM_XTENSA in order to define AUDIT_ARCH_XTENSA which is needed to implement syscall_get_arch() which in turn is required to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Cc: Max Filippov Cc: Oleg Nesterov Cc: Andy Lutomirski Cc: Elvira Khabirova Cc: Eugene Syromyatnikov Cc: Chris Zankel Cc: linux-xtensa@linux-xtensa.org Signed-off-by: Dmitry V. Levin Signed-off-by: Max Filippov

xtensa: drop unused declarations from elf.h

2018-12-03T09:39:24Z

do_copy_regs, do_restore_regs, do_save_fpregs and do_restore_fpregs are not used or implemented by xtensa, drop these declarations from the arch/xtensa/include/asm/elf.h Signed-off-by: Max Filippov

xtensa: add support for TLS

2013-02-24T03:35:57Z

The Xtensa architecture provides a global register called THREADPTR for the purpose of Thread Local Storage (TLS) support. This allows us to use a fairly simple implementation, keeping the thread pointer in the regset and simply saving and restoring it upon entering/exiting the from user space. Signed-off-by: Chris Zankel

xtensa: clean up files to make them code-style compliant

2012-12-19T05:10:25Z

Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel

cross-arch: don't corrupt personality flags upon exec()

2012-10-05T18:04:47Z

Historically, the top three bytes of personality have been used for things such as ADDR_NO_RANDOMIZE, which made sense only for specific architectures. We now however have a flag there that is general no matter the architecture (UNAME26); generally we have to be careful to preserve the personality flags across exec(). This patch tries to fix all architectures that forcefully overwrite personality flags during exec() (ppc32 and s390 have been fixed recently by commits f9783ec862ea ("[S390] Do not clobber personality flags on exec") and 59e4c3a2fe9c ("powerpc/32: Don't clobber personality flags on exec") in a similar way already). Signed-off-by: Jiri Kosina Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Mike Frysinger Cc: Mark Salter Cc: Mikael Starvik Cc: Jesper Nilsson Cc: David Howells Cc: Yoshinori Sato Cc: Richard Kuo Cc: Hirokazu Takata Cc: Geert Uytterhoeven Cc: Michal Simek Cc: Koichi Yasutake Cc: Jonas Bonn Cc: Chen Liqin Cc: Lennox Wu Cc: Paul Mundt Cc: "David S. Miller" Cc: Chris Zankel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

xtensa: Shuffle include statements to fix linker script

2010-05-02T08:05:13Z

The linker script was including assembly macros from the coprocessor header file that is not otherwise used by the script. Signed-off-by: Chris Zankel