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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-04 18:04:44 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-04 18:04:44 -0400 |
commit | 8e7106a60748e74f4c76b2204e83f14e4dc041cc (patch) | |
tree | 99dee14b06b1d01dc1da4325c8b2fb613a5ebfae /arch | |
parent | c1ece76719205690f4b448460d9b85c130e8021b (diff) | |
parent | 002d2f01f13f1671d771e1493a3405ed4986694d (diff) | |
download | linux-8e7106a60748e74f4c76b2204e83f14e4dc041cc.tar.bz2 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu updates from Greg Ungerer:
"This series is all about Nicolas flat format support for MMU systems.
Traditional m68k no-MMU flat format binaries can now be run on m68k
MMU enabled systems too. The series includes some nice cleanups of
the binfmt_flat code and converts it to using proper user space
accessor functions.
With all this in place you can boot and run a complete no-MMU flat
format based user space on an MMU enabled system"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: enable binfmt_flat on systems with an MMU
binfmt_flat: allow compressed flat binary format to work on MMU systems
binfmt_flat: add MMU-specific support
binfmt_flat: update libraries' data segment pointer with userspace accessors
binfmt_flat: use clear_user() rather than memset() to clear .bss
binfmt_flat: use proper user space accessors with old relocs code
binfmt_flat: use proper user space accessors with relocs processing code
binfmt_flat: clean up create_flat_tables() and stack accesses
binfmt_flat: use generic transfer_args_to_stack()
elf_fdpic_transfer_args_to_stack(): make it generic
binfmt_flat: prevent kernel dammage from corrupted executable headers
binfmt_flat: convert printk invocations to their modern form
binfmt_flat: assorted cleanups
m68k: use same start_thread() on MMU and no-MMU
m68k: fix file path comment
m68k: fix bFLT executable running on MMU enabled systems
Diffstat (limited to 'arch')
-rw-r--r-- | arch/m68k/include/asm/flat.h | 13 | ||||
-rw-r--r-- | arch/m68k/include/asm/processor.h | 15 |
2 files changed, 11 insertions, 17 deletions
diff --git a/arch/m68k/include/asm/flat.h b/arch/m68k/include/asm/flat.h index f9454b89a51b..00c392b0cabd 100644 --- a/arch/m68k/include/asm/flat.h +++ b/arch/m68k/include/asm/flat.h @@ -1,5 +1,5 @@ /* - * include/asm-m68knommu/flat.h -- uClinux flat-format executables + * flat.h -- uClinux flat-format executables */ #ifndef __M68KNOMMU_FLAT_H__ @@ -8,8 +8,9 @@ #define flat_argvp_envp_on_stack() 1 #define flat_old_ram_flag(flags) (flags) #define flat_reloc_valid(reloc, size) ((reloc) <= (size)) -#define flat_get_addr_from_rp(rp, relval, flags, p) get_unaligned(rp) -#define flat_put_addr_at_rp(rp, val, relval) put_unaligned(val,rp) +#define flat_get_addr_from_rp(rp, relval, flags, p) \ + ({ unsigned long __val; __get_user_unaligned(__val, rp); __val; }) +#define flat_put_addr_at_rp(rp, val, relval) __put_user_unaligned(val, rp) #define flat_get_relocate_addr(rel) (rel) static inline int flat_set_persistent(unsigned long relval, @@ -18,4 +19,10 @@ static inline int flat_set_persistent(unsigned long relval, return 0; } +#define FLAT_PLAT_INIT(regs) \ + do { \ + if (current->mm) \ + (regs)->d5 = current->mm->start_data; \ + } while (0) + #endif /* __M68KNOMMU_FLAT_H__ */ diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h index a6ce2ec8d693..c84a2183b3f0 100644 --- a/arch/m68k/include/asm/processor.h +++ b/arch/m68k/include/asm/processor.h @@ -110,7 +110,6 @@ struct thread_struct { #define setframeformat(_regs) do { } while (0) #endif -#ifdef CONFIG_MMU /* * Do necessary setup to start up a newly executed thread. */ @@ -123,26 +122,14 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, wrusp(usp); } +#ifdef CONFIG_MMU extern int handle_kernel_fault(struct pt_regs *regs); - #else - -#define start_thread(_regs, _pc, _usp) \ -do { \ - (_regs)->pc = (_pc); \ - setframeformat(_regs); \ - if (current->mm) \ - (_regs)->d5 = current->mm->start_data; \ - (_regs)->sr &= ~0x2000; \ - wrusp(_usp); \ -} while(0) - static inline int handle_kernel_fault(struct pt_regs *regs) { /* Any fault in kernel is fatal on non-mmu */ return 0; } - #endif /* Forward declaration, a strange C thing */ |