diff options
Diffstat (limited to 'arch/arm/lib/uaccess.S')
| -rw-r--r-- | arch/arm/lib/uaccess.S | 230 |
1 files changed, 116 insertions, 114 deletions
diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S index 6f1b5b49fe4c..0cc450f863b6 100644 --- a/arch/arm/lib/uaccess.S +++ b/arch/arm/lib/uaccess.S @@ -27,7 +27,7 @@ * Returns : Number of bytes NOT copied. */ -.c2u_dest_not_aligned: +.Lc2u_dest_not_aligned: rsb ip, ip, #4 cmp ip, #2 ldrb r3, [r1], #1 @@ -37,32 +37,32 @@ USER( strgebt r3, [r0], #1) @ May fault ldrgtb r3, [r1], #1 USER( strgtbt r3, [r0], #1) @ May fault sub r2, r2, ip - b .c2u_dest_aligned + b .Lc2u_dest_aligned ENTRY(__arch_copy_to_user) stmfd sp!, {r2, r4 - r7, lr} cmp r2, #4 - blt .c2u_not_enough + blt .Lc2u_not_enough ands ip, r0, #3 - bne .c2u_dest_not_aligned -.c2u_dest_aligned: + bne .Lc2u_dest_not_aligned +.Lc2u_dest_aligned: ands ip, r1, #3 - bne .c2u_src_not_aligned + bne .Lc2u_src_not_aligned /* * Seeing as there has to be at least 8 bytes to copy, we can * copy one word, and force a user-mode page fault... */ -.c2u_0fupi: subs r2, r2, #4 +.Lc2u_0fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .c2u_0nowords + bmi .Lc2u_0nowords ldr r3, [r1], #4 USER( strt r3, [r0], #4) @ May fault mov ip, r0, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .c2u_0fupi + beq .Lc2u_0fupi /* * ip = max no. of bytes to copy before needing another "strt" insn */ @@ -70,16 +70,16 @@ USER( strt r3, [r0], #4) @ May fault movlt ip, r2 sub r2, r2, ip subs ip, ip, #32 - blt .c2u_0rem8lp + blt .Lc2u_0rem8lp -.c2u_0cpy8lp: ldmia r1!, {r3 - r6} +.Lc2u_0cpy8lp: ldmia r1!, {r3 - r6} stmia r0!, {r3 - r6} @ Shouldnt fault ldmia r1!, {r3 - r6} subs ip, ip, #32 stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .c2u_0cpy8lp + bpl .Lc2u_0cpy8lp -.c2u_0rem8lp: cmn ip, #16 +.Lc2u_0rem8lp: cmn ip, #16 ldmgeia r1!, {r3 - r6} stmgeia r0!, {r3 - r6} @ Shouldnt fault tst ip, #8 @@ -89,33 +89,33 @@ USER( strt r3, [r0], #4) @ May fault ldrne r3, [r1], #4 strnet r3, [r0], #4 @ Shouldnt fault ands ip, ip, #3 - beq .c2u_0fupi -.c2u_0nowords: teq ip, #0 - beq .c2u_finished -.c2u_nowords: cmp ip, #2 + beq .Lc2u_0fupi +.Lc2u_0nowords: teq ip, #0 + beq .Lc2u_finished +.Lc2u_nowords: cmp ip, #2 ldrb r3, [r1], #1 USER( strbt r3, [r0], #1) @ May fault ldrgeb r3, [r1], #1 USER( strgebt r3, [r0], #1) @ May fault ldrgtb r3, [r1], #1 USER( strgtbt r3, [r0], #1) @ May fault - b .c2u_finished + b .Lc2u_finished -.c2u_not_enough: +.Lc2u_not_enough: movs ip, r2 - bne .c2u_nowords -.c2u_finished: mov r0, #0 + bne .Lc2u_nowords +.Lc2u_finished: mov r0, #0 LOADREGS(fd,sp!,{r2, r4 - r7, pc}) -.c2u_src_not_aligned: +.Lc2u_src_not_aligned: bic r1, r1, #3 ldr r7, [r1], #4 cmp ip, #2 - bgt .c2u_3fupi - beq .c2u_2fupi -.c2u_1fupi: subs r2, r2, #4 + bgt .Lc2u_3fupi + beq .Lc2u_2fupi +.Lc2u_1fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .c2u_1nowords + bmi .Lc2u_1nowords mov r3, r7, pull #8 ldr r7, [r1], #4 orr r3, r3, r7, push #24 @@ -123,14 +123,14 @@ USER( strt r3, [r0], #4) @ May fault mov ip, r0, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .c2u_1fupi + beq .Lc2u_1fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .c2u_1rem8lp + blt .Lc2u_1rem8lp -.c2u_1cpy8lp: mov r3, r7, pull #8 +.Lc2u_1cpy8lp: mov r3, r7, pull #8 ldmia r1!, {r4 - r7} subs ip, ip, #16 orr r3, r3, r4, push #24 @@ -141,9 +141,9 @@ USER( strt r3, [r0], #4) @ May fault mov r6, r6, pull #8 orr r6, r6, r7, push #24 stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .c2u_1cpy8lp + bpl .Lc2u_1cpy8lp -.c2u_1rem8lp: tst ip, #8 +.Lc2u_1rem8lp: tst ip, #8 movne r3, r7, pull #8 ldmneia r1!, {r4, r7} orrne r3, r3, r4, push #24 @@ -156,21 +156,21 @@ USER( strt r3, [r0], #4) @ May fault orrne r3, r3, r7, push #24 strnet r3, [r0], #4 @ Shouldnt fault ands ip, ip, #3 - beq .c2u_1fupi -.c2u_1nowords: mov r3, r7, get_byte_1 + beq .Lc2u_1fupi +.Lc2u_1nowords: mov r3, r7, get_byte_1 teq ip, #0 - beq .c2u_finished + beq .Lc2u_finished cmp ip, #2 USER( strbt r3, [r0], #1) @ May fault movge r3, r7, get_byte_2 USER( strgebt r3, [r0], #1) @ May fault movgt r3, r7, get_byte_3 USER( strgtbt r3, [r0], #1) @ May fault - b .c2u_finished + b .Lc2u_finished -.c2u_2fupi: subs r2, r2, #4 +.Lc2u_2fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .c2u_2nowords + bmi .Lc2u_2nowords mov r3, r7, pull #16 ldr r7, [r1], #4 orr r3, r3, r7, push #16 @@ -178,14 +178,14 @@ USER( strt r3, [r0], #4) @ May fault mov ip, r0, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .c2u_2fupi + beq .Lc2u_2fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .c2u_2rem8lp + blt .Lc2u_2rem8lp -.c2u_2cpy8lp: mov r3, r7, pull #16 +.Lc2u_2cpy8lp: mov r3, r7, pull #16 ldmia r1!, {r4 - r7} subs ip, ip, #16 orr r3, r3, r4, push #16 @@ -196,9 +196,9 @@ USER( strt r3, [r0], #4) @ May fault mov r6, r6, pull #16 orr r6, r6, r7, push #16 stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .c2u_2cpy8lp + bpl .Lc2u_2cpy8lp -.c2u_2rem8lp: tst ip, #8 +.Lc2u_2rem8lp: tst ip, #8 movne r3, r7, pull #16 ldmneia r1!, {r4, r7} orrne r3, r3, r4, push #16 @@ -211,21 +211,21 @@ USER( strt r3, [r0], #4) @ May fault orrne r3, r3, r7, push #16 strnet r3, [r0], #4 @ Shouldnt fault ands ip, ip, #3 - beq .c2u_2fupi -.c2u_2nowords: mov r3, r7, get_byte_2 + beq .Lc2u_2fupi +.Lc2u_2nowords: mov r3, r7, get_byte_2 teq ip, #0 - beq .c2u_finished + beq .Lc2u_finished cmp ip, #2 USER( strbt r3, [r0], #1) @ May fault movge r3, r7, get_byte_3 USER( strgebt r3, [r0], #1) @ May fault ldrgtb r3, [r1], #0 USER( strgtbt r3, [r0], #1) @ May fault - b .c2u_finished + b .Lc2u_finished -.c2u_3fupi: subs r2, r2, #4 +.Lc2u_3fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .c2u_3nowords + bmi .Lc2u_3nowords mov r3, r7, pull #24 ldr r7, [r1], #4 orr r3, r3, r7, push #8 @@ -233,14 +233,14 @@ USER( strt r3, [r0], #4) @ May fault mov ip, r0, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .c2u_3fupi + beq .Lc2u_3fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .c2u_3rem8lp + blt .Lc2u_3rem8lp -.c2u_3cpy8lp: mov r3, r7, pull #24 +.Lc2u_3cpy8lp: mov r3, r7, pull #24 ldmia r1!, {r4 - r7} subs ip, ip, #16 orr r3, r3, r4, push #8 @@ -251,9 +251,9 @@ USER( strt r3, [r0], #4) @ May fault mov r6, r6, pull #24 orr r6, r6, r7, push #8 stmia r0!, {r3 - r6} @ Shouldnt fault - bpl .c2u_3cpy8lp + bpl .Lc2u_3cpy8lp -.c2u_3rem8lp: tst ip, #8 +.Lc2u_3rem8lp: tst ip, #8 movne r3, r7, pull #24 ldmneia r1!, {r4, r7} orrne r3, r3, r4, push #8 @@ -266,17 +266,17 @@ USER( strt r3, [r0], #4) @ May fault orrne r3, r3, r7, push #8 strnet r3, [r0], #4 @ Shouldnt fault ands ip, ip, #3 - beq .c2u_3fupi -.c2u_3nowords: mov r3, r7, get_byte_3 + beq .Lc2u_3fupi +.Lc2u_3nowords: mov r3, r7, get_byte_3 teq ip, #0 - beq .c2u_finished + beq .Lc2u_finished cmp ip, #2 USER( strbt r3, [r0], #1) @ May fault ldrgeb r3, [r1], #1 USER( strgebt r3, [r0], #1) @ May fault ldrgtb r3, [r1], #0 USER( strgtbt r3, [r0], #1) @ May fault - b .c2u_finished + b .Lc2u_finished .section .fixup,"ax" .align 0 @@ -290,7 +290,7 @@ USER( strgtbt r3, [r0], #1) @ May fault * : n - number of bytes to copy * Returns : Number of bytes NOT copied. */ -.cfu_dest_not_aligned: +.Lcfu_dest_not_aligned: rsb ip, ip, #4 cmp ip, #2 USER( ldrbt r3, [r1], #1) @ May fault @@ -300,31 +300,32 @@ USER( ldrgebt r3, [r1], #1) @ May fault USER( ldrgtbt r3, [r1], #1) @ May fault strgtb r3, [r0], #1 sub r2, r2, ip - b .cfu_dest_aligned + b .Lcfu_dest_aligned ENTRY(__arch_copy_from_user) stmfd sp!, {r0, r2, r4 - r7, lr} cmp r2, #4 - blt .cfu_not_enough + blt .Lcfu_not_enough ands ip, r0, #3 - bne .cfu_dest_not_aligned -.cfu_dest_aligned: + bne .Lcfu_dest_not_aligned +.Lcfu_dest_aligned: ands ip, r1, #3 - bne .cfu_src_not_aligned + bne .Lcfu_src_not_aligned + /* * Seeing as there has to be at least 8 bytes to copy, we can * copy one word, and force a user-mode page fault... */ -.cfu_0fupi: subs r2, r2, #4 +.Lcfu_0fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .cfu_0nowords + bmi .Lcfu_0nowords USER( ldrt r3, [r1], #4) str r3, [r0], #4 mov ip, r1, lsl #32 - PAGE_SHIFT @ On each page, use a ld/st??t instruction rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .cfu_0fupi + beq .Lcfu_0fupi /* * ip = max no. of bytes to copy before needing another "strt" insn */ @@ -332,16 +333,16 @@ USER( ldrt r3, [r1], #4) movlt ip, r2 sub r2, r2, ip subs ip, ip, #32 - blt .cfu_0rem8lp + blt .Lcfu_0rem8lp -.cfu_0cpy8lp: ldmia r1!, {r3 - r6} @ Shouldnt fault +.Lcfu_0cpy8lp: ldmia r1!, {r3 - r6} @ Shouldnt fault stmia r0!, {r3 - r6} ldmia r1!, {r3 - r6} @ Shouldnt fault subs ip, ip, #32 stmia r0!, {r3 - r6} - bpl .cfu_0cpy8lp + bpl .Lcfu_0cpy8lp -.cfu_0rem8lp: cmn ip, #16 +.Lcfu_0rem8lp: cmn ip, #16 ldmgeia r1!, {r3 - r6} @ Shouldnt fault stmgeia r0!, {r3 - r6} tst ip, #8 @@ -351,34 +352,34 @@ USER( ldrt r3, [r1], #4) ldrnet r3, [r1], #4 @ Shouldnt fault strne r3, [r0], #4 ands ip, ip, #3 - beq .cfu_0fupi -.cfu_0nowords: teq ip, #0 - beq .cfu_finished -.cfu_nowords: cmp ip, #2 + beq .Lcfu_0fupi +.Lcfu_0nowords: teq ip, #0 + beq .Lcfu_finished +.Lcfu_nowords: cmp ip, #2 USER( ldrbt r3, [r1], #1) @ May fault strb r3, [r0], #1 USER( ldrgebt r3, [r1], #1) @ May fault strgeb r3, [r0], #1 USER( ldrgtbt r3, [r1], #1) @ May fault strgtb r3, [r0], #1 - b .cfu_finished + b .Lcfu_finished -.cfu_not_enough: +.Lcfu_not_enough: movs ip, r2 - bne .cfu_nowords -.cfu_finished: mov r0, #0 + bne .Lcfu_nowords +.Lcfu_finished: mov r0, #0 add sp, sp, #8 LOADREGS(fd,sp!,{r4 - r7, pc}) -.cfu_src_not_aligned: +.Lcfu_src_not_aligned: bic r1, r1, #3 USER( ldrt r7, [r1], #4) @ May fault cmp ip, #2 - bgt .cfu_3fupi - beq .cfu_2fupi -.cfu_1fupi: subs r2, r2, #4 + bgt .Lcfu_3fupi + beq .Lcfu_2fupi +.Lcfu_1fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .cfu_1nowords + bmi .Lcfu_1nowords mov r3, r7, pull #8 USER( ldrt r7, [r1], #4) @ May fault orr r3, r3, r7, push #24 @@ -386,14 +387,14 @@ USER( ldrt r7, [r1], #4) @ May fault mov ip, r1, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .cfu_1fupi + beq .Lcfu_1fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .cfu_1rem8lp + blt .Lcfu_1rem8lp -.cfu_1cpy8lp: mov r3, r7, pull #8 +.Lcfu_1cpy8lp: mov r3, r7, pull #8 ldmia r1!, {r4 - r7} @ Shouldnt fault subs ip, ip, #16 orr r3, r3, r4, push #24 @@ -404,9 +405,9 @@ USER( ldrt r7, [r1], #4) @ May fault mov r6, r6, pull #8 orr r6, r6, r7, push #24 stmia r0!, {r3 - r6} - bpl .cfu_1cpy8lp + bpl .Lcfu_1cpy8lp -.cfu_1rem8lp: tst ip, #8 +.Lcfu_1rem8lp: tst ip, #8 movne r3, r7, pull #8 ldmneia r1!, {r4, r7} @ Shouldnt fault orrne r3, r3, r4, push #24 @@ -419,21 +420,21 @@ USER( ldrnet r7, [r1], #4) @ May fault orrne r3, r3, r7, push #24 strne r3, [r0], #4 ands ip, ip, #3 - beq .cfu_1fupi -.cfu_1nowords: mov r3, r7, get_byte_1 + beq .Lcfu_1fupi +.Lcfu_1nowords: mov r3, r7, get_byte_1 teq ip, #0 - beq .cfu_finished + beq .Lcfu_finished cmp ip, #2 strb r3, [r0], #1 movge r3, r7, get_byte_2 strgeb r3, [r0], #1 movgt r3, r7, get_byte_3 strgtb r3, [r0], #1 - b .cfu_finished + b .Lcfu_finished -.cfu_2fupi: subs r2, r2, #4 +.Lcfu_2fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .cfu_2nowords + bmi .Lcfu_2nowords mov r3, r7, pull #16 USER( ldrt r7, [r1], #4) @ May fault orr r3, r3, r7, push #16 @@ -441,14 +442,15 @@ USER( ldrt r7, [r1], #4) @ May fault mov ip, r1, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .cfu_2fupi + beq .Lcfu_2fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .cfu_2rem8lp + blt .Lcfu_2rem8lp + -.cfu_2cpy8lp: mov r3, r7, pull #16 +.Lcfu_2cpy8lp: mov r3, r7, pull #16 ldmia r1!, {r4 - r7} @ Shouldnt fault subs ip, ip, #16 orr r3, r3, r4, push #16 @@ -459,9 +461,9 @@ USER( ldrt r7, [r1], #4) @ May fault mov r6, r6, pull #16 orr r6, r6, r7, push #16 stmia r0!, {r3 - r6} - bpl .cfu_2cpy8lp + bpl .Lcfu_2cpy8lp -.cfu_2rem8lp: tst ip, #8 +.Lcfu_2rem8lp: tst ip, #8 movne r3, r7, pull #16 ldmneia r1!, {r4, r7} @ Shouldnt fault orrne r3, r3, r4, push #16 @@ -474,21 +476,21 @@ USER( ldrnet r7, [r1], #4) @ May fault orrne r3, r3, r7, push #16 strne r3, [r0], #4 ands ip, ip, #3 - beq .cfu_2fupi -.cfu_2nowords: mov r3, r7, get_byte_2 + beq .Lcfu_2fupi +.Lcfu_2nowords: mov r3, r7, get_byte_2 teq ip, #0 - beq .cfu_finished + beq .Lcfu_finished cmp ip, #2 strb r3, [r0], #1 movge r3, r7, get_byte_3 strgeb r3, [r0], #1 USER( ldrgtbt r3, [r1], #0) @ May fault strgtb r3, [r0], #1 - b .cfu_finished + b .Lcfu_finished -.cfu_3fupi: subs r2, r2, #4 +.Lcfu_3fupi: subs r2, r2, #4 addmi ip, r2, #4 - bmi .cfu_3nowords + bmi .Lcfu_3nowords mov r3, r7, pull #24 USER( ldrt r7, [r1], #4) @ May fault orr r3, r3, r7, push #8 @@ -496,14 +498,14 @@ USER( ldrt r7, [r1], #4) @ May fault mov ip, r1, lsl #32 - PAGE_SHIFT rsb ip, ip, #0 movs ip, ip, lsr #32 - PAGE_SHIFT - beq .cfu_3fupi + beq .Lcfu_3fupi cmp r2, ip movlt ip, r2 sub r2, r2, ip subs ip, ip, #16 - blt .cfu_3rem8lp + blt .Lcfu_3rem8lp -.cfu_3cpy8lp: mov r3, r7, pull #24 +.Lcfu_3cpy8lp: mov r3, r7, pull #24 ldmia r1!, {r4 - r7} @ Shouldnt fault orr r3, r3, r4, push #8 mov r4, r4, pull #24 @@ -514,9 +516,9 @@ USER( ldrt r7, [r1], #4) @ May fault orr r6, r6, r7, push #8 stmia r0!, {r3 - r6} subs ip, ip, #16 - bpl .cfu_3cpy8lp + bpl .Lcfu_3cpy8lp -.cfu_3rem8lp: tst ip, #8 +.Lcfu_3rem8lp: tst ip, #8 movne r3, r7, pull #24 ldmneia r1!, {r4, r7} @ Shouldnt fault orrne r3, r3, r4, push #8 @@ -529,17 +531,17 @@ USER( ldrnet r7, [r1], #4) @ May fault orrne r3, r3, r7, push #8 strne r3, [r0], #4 ands ip, ip, #3 - beq .cfu_3fupi -.cfu_3nowords: mov r3, r7, get_byte_3 + beq .Lcfu_3fupi +.Lcfu_3nowords: mov r3, r7, get_byte_3 teq ip, #0 - beq .cfu_finished + beq .Lcfu_finished cmp ip, #2 strb r3, [r0], #1 USER( ldrgebt r3, [r1], #1) @ May fault strgeb r3, [r0], #1 USER( ldrgtbt r3, [r1], #1) @ May fault strgtb r3, [r0], #1 - b .cfu_finished + b .Lcfu_finished .section .fixup,"ax" .align 0 |
