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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 14:41:04 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 14:41:04 -0700 |
commit | 5db6db0d400edd8bec274e34960cfa22838e1df5 (patch) | |
tree | 3d7934f2eb27a2b72b87eae3c2918cf2e635d814 /include/asm-generic/extable.h | |
parent | 5fab10041b4389b61de7e7a49893190bae686241 (diff) | |
parent | 2fefc97b2180518bac923fba3f79fdca1f41dc15 (diff) |
Merge branch 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess unification updates from Al Viro:
"This is the uaccess unification pile. It's _not_ the end of uaccess
work, but the next batch of that will go into the next cycle. This one
mostly takes copy_from_user() and friends out of arch/* and gets the
zero-padding behaviour in sync for all architectures.
Dealing with the nocache/writethrough mess is for the next cycle;
fortunately, that's x86-only. Same for cleanups in iov_iter.c (I am
sold on access_ok() in there, BTW; just not in this pile), same for
reducing __copy_... callsites, strn*... stuff, etc. - there will be a
pile about as large as this one in the next merge window.
This one sat in -next for weeks. -3KLoC"
* 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (96 commits)
HAVE_ARCH_HARDENED_USERCOPY is unconditional now
CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now
m32r: switch to RAW_COPY_USER
hexagon: switch to RAW_COPY_USER
microblaze: switch to RAW_COPY_USER
get rid of padding, switch to RAW_COPY_USER
ia64: get rid of copy_in_user()
ia64: sanitize __access_ok()
ia64: get rid of 'segment' argument of __do_{get,put}_user()
ia64: get rid of 'segment' argument of __{get,put}_user_check()
ia64: add extable.h
powerpc: get rid of zeroing, switch to RAW_COPY_USER
esas2r: don't open-code memdup_user()
alpha: fix stack smashing in old_adjtimex(2)
don't open-code kernel_setsockopt()
mips: switch to RAW_COPY_USER
mips: get rid of tail-zeroing in primitives
mips: make copy_from_user() zero tail explicitly
mips: clean and reorder the forest of macros...
mips: consolidate __invoke_... wrappers
...
Diffstat (limited to 'include/asm-generic/extable.h')
-rw-r--r-- | include/asm-generic/extable.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-generic/extable.h b/include/asm-generic/extable.h new file mode 100644 index 000000000000..ca14c6664027 --- /dev/null +++ b/include/asm-generic/extable.h @@ -0,0 +1,26 @@ +#ifndef __ASM_GENERIC_EXTABLE_H +#define __ASM_GENERIC_EXTABLE_H + +/* + * The exception table consists of pairs of addresses: the first is the + * address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out + * what to do. + * + * All the routines below use bits of fixup code that are out of line + * with the main instruction path. This means when everything is well, + * we don't even have to jump over them. Further, they do not intrude + * on our cache or tlb entries. + */ + +struct exception_table_entry +{ + unsigned long insn, fixup; +}; + + +struct pt_regs; +extern int fixup_exception(struct pt_regs *regs); + +#endif |