diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m32r/lib/getuser.S | |
| download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m32r/lib/getuser.S')
| -rw-r--r-- | arch/m32r/lib/getuser.S | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/m32r/lib/getuser.S b/arch/m32r/lib/getuser.S new file mode 100644 index 000000000000..58a0db055c5c --- /dev/null +++ b/arch/m32r/lib/getuser.S @@ -0,0 +1,88 @@ +/* + * __get_user functions. + * + * (C) Copyright 2001 Hirokazu Takata + * + * These functions have a non-standard call interface + * to make them more efficient, especially as they + * return an error value in addition to the "real" + * return value. + */ + +#include <linux/config.h> + +/* + * __get_user_X + * + * Inputs: r0 contains the address + * + * Outputs: r0 is error code (0 or -EFAULT) + * r1 contains zero-extended value + * + * These functions should not modify any other registers, + * as they get called from within inline assembly. + */ + +#ifdef CONFIG_ISA_DUAL_ISSUE + + .text + .balign 4 + .globl __get_user_1 +__get_user_1: +1: ldub r1, @r0 || ldi r0, #0 + jmp r14 + + .balign 4 + .globl __get_user_2 +__get_user_2: +2: lduh r1, @r0 || ldi r0, #0 + jmp r14 + + .balign 4 + .globl __get_user_4 +__get_user_4: +3: ld r1, @r0 || ldi r0, #0 + jmp r14 + +bad_get_user: + ldi r1, #0 || ldi r0, #-14 + jmp r14 + +#else /* not CONFIG_ISA_DUAL_ISSUE */ + + .text + .balign 4 + .globl __get_user_1 +__get_user_1: +1: ldub r1, @r0 + ldi r0, #0 + jmp r14 + + .balign 4 + .globl __get_user_2 +__get_user_2: +2: lduh r1, @r0 + ldi r0, #0 + jmp r14 + + .balign 4 + .globl __get_user_4 +__get_user_4: +3: ld r1, @r0 + ldi r0, #0 + jmp r14 + +bad_get_user: + ldi r1, #0 + ldi r0, #-14 + jmp r14 + +#endif /* not CONFIG_ISA_DUAL_ISSUE */ + +.section __ex_table,"a" + .long 1b,bad_get_user + .long 2b,bad_get_user + .long 3b,bad_get_user +.previous + + .end |
