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| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-01-02 16:04:38 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-26 23:09:13 +0100 |
| commit | 053970542f049d3e30dc4be6eb19e92ff1f70f00 (patch) | |
| tree | 63fcc75f9ae253079349d640b0fd7a9caf1c9060 | |
| parent | 5cc494972adbaeff08a1b7544acaa608c68cd527 (diff) | |
| download | linux-053970542f049d3e30dc4be6eb19e92ff1f70f00.tar.gz | |
MIPS: lib: strlen_user: Add EVA support
In non-EVA mode, strlen_user* aliases are used for the strlen_kernel* symbols since the code is identical. In EVA mode, new strlen_user* symbols are used which use the EVA specific instructions to load values from userspace. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
| -rw-r--r-- | arch/mips/kernel/mips_ksyms.c | 4 | ||||
| -rw-r--r-- | arch/mips/lib/strlen_user.S | 20 |
2 files changed, 24 insertions, 0 deletions
diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c index a322db072c3c..742ed7d790a0 100644 --- a/arch/mips/kernel/mips_ksyms.c +++ b/arch/mips/kernel/mips_ksyms.c @@ -20,6 +20,8 @@ extern long __strncpy_from_user_nocheck_asm(char *__to, const char *__from, long __len); extern long __strncpy_from_user_asm(char *__to, const char *__from, long __len); +extern long __strlen_kernel_nocheck_asm(const char *s); +extern long __strlen_kernel_asm(const char *s); extern long __strlen_user_nocheck_asm(const char *s); extern long __strlen_user_asm(const char *s); extern long __strnlen_kernel_nocheck_asm(const char *s); @@ -48,6 +50,8 @@ EXPORT_SYMBOL(__copy_user_inatomic); EXPORT_SYMBOL(__bzero); EXPORT_SYMBOL(__strncpy_from_user_nocheck_asm); EXPORT_SYMBOL(__strncpy_from_user_asm); +EXPORT_SYMBOL(__strlen_kernel_nocheck_asm); +EXPORT_SYMBOL(__strlen_kernel_asm); EXPORT_SYMBOL(__strlen_user_nocheck_asm); EXPORT_SYMBOL(__strlen_user_asm); EXPORT_SYMBOL(__strnlen_kernel_nocheck_asm); diff --git a/arch/mips/lib/strlen_user.S b/arch/mips/lib/strlen_user.S index 6e8bdb373213..bef65c98df59 100644 --- a/arch/mips/lib/strlen_user.S +++ b/arch/mips/lib/strlen_user.S @@ -30,7 +30,11 @@ LEAF(__strlen_\func\()_asm) FEXPORT(__strlen_\func\()_nocheck_asm) move v0, a0 +.ifeqs "\func", "kernel" 1: EX(lbu, v1, (v0), .Lfault\@) +.else +1: EX(lbue, v1, (v0), .Lfault\@) +.endif PTR_ADDIU v0, 1 bnez v1, 1b PTR_SUBU v0, a0 @@ -41,4 +45,20 @@ FEXPORT(__strlen_\func\()_nocheck_asm) jr ra .endm +#ifndef CONFIG_EVA + /* Set aliases */ + .global __strlen_user_asm + .global __strlen_user_nocheck_asm + .set __strlen_user_asm, __strlen_kernel_asm + .set __strlen_user_nocheck_asm, __strlen_kernel_nocheck_asm +#endif + +__BUILD_STRLEN_ASM kernel + +#ifdef CONFIG_EVA + + .set push + .set eva __BUILD_STRLEN_ASM user + .set pop +#endif |