diff options
Diffstat (limited to 'arch/arm/mm/abort-lv4t.S')
| -rw-r--r-- | arch/arm/mm/abort-lv4t.S | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/arch/arm/mm/abort-lv4t.S b/arch/arm/mm/abort-lv4t.S index d032b1f2067b..d432f31cdab5 100644 --- a/arch/arm/mm/abort-lv4t.S +++ b/arch/arm/mm/abort-lv4t.S @@ -3,7 +3,8 @@ /* * Function: v4t_late_abort * - * Params : r4 = aborted context pc + * Params : r2 = pt_regs + * : r4 = aborted context pc * : r5 = aborted context psr * * Returns : r0 = address of abort @@ -47,20 +48,18 @@ ENTRY(v4t_late_abort) /* 9 */ b .data_arm_ldmstm @ ldm*b rn, <rlist> /* a */ b .data_unknown /* b */ b .data_unknown -/* c */ mov pc, lr @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m -/* d */ mov pc, lr @ ldc rd, [rn, #m] +/* c */ b do_DataAbort @ ldc rd, [rn], #m @ Same as ldr rd, [rn], #m +/* d */ b do_DataAbort @ ldc rd, [rn, #m] /* e */ b .data_unknown /* f */ .data_unknown: @ Part of jumptable mov r0, r4 mov r1, r8 - mov r2, sp - bl baddataabort - b ret_from_exception + b baddataabort .data_arm_ldmstm: tst r8, #1 << 21 @ check writeback bit - moveq pc, lr @ no writeback -> no fixup + beq do_DataAbort @ no writeback -> no fixup mov r7, #0x11 orr r7, r7, #0x1100 and r6, r8, r7 @@ -79,11 +78,11 @@ ENTRY(v4t_late_abort) subne r7, r7, r6, lsl #2 @ Undo increment addeq r7, r7, r6, lsl #2 @ Undo decrement str r7, [sp, r5, lsr #14] @ Put register 'Rn' - mov pc, lr + b do_DataAbort .data_arm_lateldrhpre: tst r8, #1 << 21 @ Check writeback bit - moveq pc, lr @ No writeback -> no fixup + beq do_DataAbort @ No writeback -> no fixup .data_arm_lateldrhpost: and r5, r8, #0x00f @ get Rm / low nibble of immediate value tst r8, #1 << 22 @ if (immediate offset) @@ -97,25 +96,25 @@ ENTRY(v4t_late_abort) subne r7, r7, r6 @ Undo incrmenet addeq r7, r7, r6 @ Undo decrement str r7, [sp, r5, lsr #14] @ Put register 'Rn' - mov pc, lr + b do_DataAbort .data_arm_lateldrpreconst: tst r8, #1 << 21 @ check writeback bit - moveq pc, lr @ no writeback -> no fixup + beq do_DataAbort @ no writeback -> no fixup .data_arm_lateldrpostconst: movs r9, r8, lsl #20 @ Get offset - moveq pc, lr @ zero -> no fixup + beq do_DataAbort @ zero -> no fixup and r5, r8, #15 << 16 @ Extract 'n' from instruction ldr r7, [sp, r5, lsr #14] @ Get register 'Rn' tst r8, #1 << 23 @ Check U bit subne r7, r7, r9, lsr #20 @ Undo increment addeq r7, r7, r9, lsr #20 @ Undo decrement str r7, [sp, r5, lsr #14] @ Put register 'Rn' - mov pc, lr + b do_DataAbort .data_arm_lateldrprereg: tst r8, #1 << 21 @ check writeback bit - moveq pc, lr @ no writeback -> no fixup + beq do_DataAbort @ no writeback -> no fixup .data_arm_lateldrpostreg: and r7, r8, #15 @ Extract 'm' from instruction ldr r6, [sp, r7, lsl #2] @ Get register 'Rm' @@ -172,10 +171,10 @@ ENTRY(v4t_late_abort) /* 3 */ b .data_unknown /* 4 */ b .data_unknown /* 5 */ b .data_thumb_reg -/* 6 */ mov pc, lr -/* 7 */ mov pc, lr -/* 8 */ mov pc, lr -/* 9 */ mov pc, lr +/* 6 */ b do_DataAbort +/* 7 */ b do_DataAbort +/* 8 */ b do_DataAbort +/* 9 */ b do_DataAbort /* A */ b .data_unknown /* B */ b .data_thumb_pushpop /* C */ b .data_thumb_ldmstm @@ -185,10 +184,10 @@ ENTRY(v4t_late_abort) .data_thumb_reg: tst r8, #1 << 9 - moveq pc, lr + beq do_DataAbort tst r8, #1 << 10 @ If 'S' (signed) bit is set movne r1, #0 @ it must be a load instr - mov pc, lr + b do_DataAbort .data_thumb_pushpop: tst r8, #1 << 10 @@ -207,7 +206,7 @@ ENTRY(v4t_late_abort) addeq r7, r7, r6, lsl #2 @ increment SP if PUSH subne r7, r7, r6, lsl #2 @ decrement SP if POP str r7, [sp, #13 << 2] - mov pc, lr + b do_DataAbort .data_thumb_ldmstm: and r6, r8, #0x55 @ hweight8(r8) @@ -222,4 +221,4 @@ ENTRY(v4t_late_abort) and r6, r6, #15 @ number of regs to transfer sub r7, r7, r6, lsl #2 @ always decrement str r7, [sp, r5, lsr #6] - mov pc, lr + b do_DataAbort |