diff options
Diffstat (limited to 'arch/mips/lib/strncpy_user.S')
| -rw-r--r-- | arch/mips/lib/strncpy_user.S | 51 |
1 files changed, 37 insertions, 14 deletions
diff --git a/arch/mips/lib/strncpy_user.S b/arch/mips/lib/strncpy_user.S index 92870b6b53e..3c32baf8b49 100644 --- a/arch/mips/lib/strncpy_user.S +++ b/arch/mips/lib/strncpy_user.S @@ -28,34 +28,57 @@ * it happens at most some bytes of the exceptions handlers will be copied. */ -LEAF(__strncpy_from_user_asm) + .macro __BUILD_STRNCPY_ASM func +LEAF(__strncpy_from_\func\()_asm) LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok? and v0, a1 - bnez v0, .Lfault + bnez v0, .Lfault\@ -FEXPORT(__strncpy_from_user_nocheck_asm) - .set noreorder +FEXPORT(__strncpy_from_\func\()_nocheck_asm) move t0, zero move v1, a1 -1: EX(lbu, v0, (v1), .Lfault) +.ifeqs "\func","kernel" +1: EX(lbu, v0, (v1), .Lfault\@) +.else +1: EX(lbue, v0, (v1), .Lfault\@) +.endif PTR_ADDIU v1, 1 R10KCBARRIER(0(ra)) + sb v0, (a0) beqz v0, 2f - sb v0, (a0) PTR_ADDIU t0, 1 + PTR_ADDIU a0, 1 bne t0, a2, 1b - PTR_ADDIU a0, 1 2: PTR_ADDU v0, a1, t0 xor v0, a1 - bltz v0, .Lfault - nop + bltz v0, .Lfault\@ + move v0, t0 jr ra # return n - move v0, t0 - END(__strncpy_from_user_asm) + END(__strncpy_from_\func\()_asm) -.Lfault: jr ra - li v0, -EFAULT +.Lfault\@: + li v0, -EFAULT + jr ra .section __ex_table,"a" - PTR 1b, .Lfault + PTR 1b, .Lfault\@ .previous + + .endm + +#ifndef CONFIG_EVA + /* Set aliases */ + .global __strncpy_from_user_asm + .global __strncpy_from_user_nocheck_asm + .set __strncpy_from_user_asm, __strncpy_from_kernel_asm + .set __strncpy_from_user_nocheck_asm, __strncpy_from_kernel_nocheck_asm +#endif + +__BUILD_STRNCPY_ASM kernel + +#ifdef CONFIG_EVA + .set push + .set eva +__BUILD_STRNCPY_ASM user + .set pop +#endif |