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List: linux-parisc
Subject: Re: Unaligned access in scsi blk_rq_map_sg
From: John David Anglin <dave.anglin () bell ! net>
Date: 2015-09-13 19:40:25
Message-ID: 4FC538D2-3433-473B-90B2-F5C144352D77 () bell ! net
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On 2015-09-12, at 6:40 PM, John David Anglin wrote:
> On 2015-09-12, at 6:13 PM, John David Anglin wrote:
>
>> With Linus' tree at head, I got the following boot error today:
>>
>> scsi 4:0:0:0: Direct-Access HP 73.4G ST373207LW HPC1 PQ: 0 ANSI: 3
>> scsi target4:0:0: Beginning Domain Validation
>> scsi target4:0:0: Ending Domain Validation
>> scsi target4:0:0: FAST-160 WIDE SCSI 320.0 MB/s DT IU QAS RTI WRFLOW PCOMP (6.2)
>> scsi 4:0:2:0: Direct-Access HP 73.4G ST373207LW HPC1 PQ: 0 ANSI: 3
>> scsi target4:0:2: Beginning Domain Validation
>> scsi target4:0:2: Ending Domain Validation
>> scsi target4:0:2: FAST-160 WIDE SCSI 320.0 MB/s DT IU QAS RTI WRFLOW PCOMP (6.2)
>> ata3: SATA link down (SStatus 0 SControl 0)
>> random: nonblocking pool is initialized
>> ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
>> ata4.00: ATA-9: ST3000DM001-1ER166, CC25, max UDMA/133
>> ata4.00: 5860533168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> ata4.00: configured for UDMA/100
>> scsi 3:0:0:0: Direct-Access ATA ST3000DM001-1ER1 CC25 PQ: 0 ANSI: 5
>> sd 3:0:0:0: [sdc] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
>> sd 4:0:0:0: [sda] 143374738 512-byte logical blocks: (73.4 GB/68.3 GiB)
>> sd 4:0:2:0: [sdb] 143374738 512-byte logical blocks: (73.4 GB/68.3 GiB)
>> sd 4:0:0:0: [sda] Write Protect is off
>> sd 4:0:2:0: [sdb] Write Protect is off
>> sd 4:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FA
>> sd 4:0:2:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FA
>> mptbase: ioc1: Initiating bringup
>> sd 3:0:0:0: [sdc] 4096-byte physical blocks
>> sd 3:0:0:0: [sdc] Write Protect is off
>> sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPA
>> sdc: sdc1
>> sd 3:0:0:0: [sdc] Attached SCSI disk
>> ioc1: LSI53C1030 B2: Capabilities={Initiator,Target}
>> scsi host5: ioc1: LSI53C1030 B2, FwRev=01032341h, Ports=1, MaxQ=255, IRQ=68
>> sda: sda1 sda2 sda3 sda4
>> sd 4:0:2:0: [sdb] Attached SCSI disk
>> sd 4:0:0:0: [sda] Attached SCSI disk
>> scsi_id(992): unaligned access to 0x00000000fae5b009 at ip=0x00000000410039a7
>> scsi_id(993): unaligned access to 0x00000000fa7b9009 at ip=0x00000000410039a7
>> Backtrace:
>> [<000000000c1bb008>] scsi_init_sgtable+0x70/0x168 [scsi_mod]
>> [<000000000c1bb16c>] scsi_init_io+0x6c/0x250 [scsi_mod]
>> [<00000000107355a0>] sd_setup_read_write_cmnd+0x58/0x940 [sd_mod]
>> [<0000000010735ecc>] sd_init_command+0x44/0x130 [sd_mod]
>> [<000000000c1bb454>] scsi_setup_cmnd+0x104/0x1c0 [scsi_mod]
>> [<000000000c1bb7a0>] scsi_prep_fn+0x100/0x340 [scsi_mod]
>> [<000000004035cc50>] blk_peek_request+0x1b8/0x298
>> [<000000000c1bd3b0>] scsi_request_fn+0xf8/0xab0 [scsi_mod]
>> [<00000000403584ec>] __blk_run_queue+0x4c/0x70
>> [<000000004038126c>] cfq_insert_request+0x2dc/0x580
>> [<00000000403576ac>] __elv_add_request+0x1b4/0x300
>>
>>
>> Bad Address (null pointer deref?): Code=15 regs=000000007c65d260 (Addr=0000003b)
>> CPU: 2 PID: 936 Comm: systemd-udevd Not tainted 4.2.0+ #1
>> task: 000000033f98a348 ti: 000000007c65c000 task.ti: 000000007c65c000
>>
>> YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
>> PSW: 00001000000001001111111100001110 Not tainted
>> r00-03 000000ff0804ff0e 000000007c65d130 0000000040363660 000000007c65d130
>> r04-07 00000000406f18f0 0000000000004000 0000000000000320 0000000000000000
>> r08-11 0000000000000000 0000000000000001 0001003b00000000 000000007e650dc0
>> r12-15 0000000000001000 0000000000000032 0000000000000004 0000000042d0d780
>> r16-19 0000000000000000 000000007e4cf088 0000000000001000 0000000000001000
>> r20-23 0000000000000000 000000007c1ce000 0000000000011000 000000004076d900
>> r24-27 0002d12b3ff4bb53 cffd2ed4c0000000 000000007e48cb20 00000000406f18f0
>> r28-31 0001003b00000000 000000007c65d230 000000007c65d260 0000000000000001
>> sr00-03 0000000000019000 0000000000000000 0000000000000000 0000000000019000
>> sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000
>>
>> IASQ: 0000000000000000 0000000000000000 IAOQ: 0000000040363668 000000004036366c
>> IIR: 0d4010dc ISR: 0000000000010000 IOR: 0000003b00000000
>> CPU: 2 CR30: 000000007c65c000 CR31: ffffffffffffffff
>> ORIG_R28: 0000000000000000
>> IAOQ[0]: blk_rq_map_sg+0x310/0x5d8
>> IAOQ[1]: blk_rq_map_sg+0x314/0x5d8
>> RP(r2): blk_rq_map_sg+0x308/0x5d8
>> Backtrace:
>> [<000000000c1bb008>] scsi_init_sgtable+0x70/0x168 [scsi_mod]
>> [<000000000c1bb16c>] scsi_init_io+0x6c/0x250 [scsi_mod]
>> [<00000000107355a0>] sd_setup_read_write_cmnd+0x58/0x940 [sd_mod]
>> [<0000000010735ecc>] sd_init_command+0x44/0x130 [sd_mod]
>> [<000000000c1bb454>] scsi_setup_cmnd+0x104/0x1c0 [scsi_mod]
>> [<000000000c1bb7a0>] scsi_prep_fn+0x100/0x340 [scsi_mod]
>> [<000000004035cc50>] blk_peek_request+0x1b8/0x298
>> [<000000000c1bd3b0>] scsi_request_fn+0xf8/0xab0 [scsi_mod]
>> [<00000000403584ec>] __blk_run_queue+0x4c/0x70
>> [<000000004038126c>] cfq_insert_request+0x2dc/0x580
>> [<00000000403576ac>] __elv_add_request+0x1b4/0x300
>>
>> Kernel panic - not syncing: Bad Address (null pointer deref?)
>
>
> It appears the unaligned accesses were present before but didn't cause a panic:
>
> ioc1: LSI53C1030 B2: Capabilities={Initiator,Target}
> scsi 3:0:0:0: Direct-Access ATA ST3000DM001-1ER1 CC25 PQ: 0 ANSI: 5
> sd 3:0:0:0: [sdc] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
> sd 3:0:0:0: [sdc] 4096-byte physical blocks
> sd 3:0:0:0: [sdc] Write Protect is off
> sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPA
> sdc: sdc1
> sd 3:0:0:0: [sdc] Attached SCSI disk
> scsi host5: ioc1: LSI53C1030 B2, FwRev=01032341h, Ports=1, MaxQ=255, IRQ=68
> sd 4:0:2:0: [sdb] Spinning up disk...
> sd 4:0:0:0: [sda] 143374738 512-byte logical blocks: (73.4 GB/68.3 GiB)
> sd 4:0:0:0: [sda] Write Protect is off
> sd 4:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FA
> .
> sda: sda1 sda2 sda3 sda4
> sd 4:0:0:0: [sda] Attached SCSI disk
> ...
> scsi_id(938): unaligned access to 0x00000000faed4009 at ip=0x00000000410038df
> .....ready
> sd 4:0:2:0: [sdb] 143374738 512-byte logical blocks: (73.4 GB/68.3 GiB)
> sd 4:0:2:0: [sdb] Write Protect is off
> sd 4:0:2:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FA
> sd 4:0:2:0: [sdb] Attached SCSI disk
> scsi_id(942): unaligned access to 0x00000000fae77009 at ip=0x00000000410038df
> Begin: Loading essential drivers ... done.
> Begin: Running /scripts/init-premount ... done.
> Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
> Begin: Running /scripts/local-premount ... done.
> Begin: Checking root file system ... fsck from util-linux 2.26.2
> ROOT: clean, 128634/4341760 files, 3291642/17343502 blocks
> done.
> kjournald starting. Commit interval 5 seconds
> EXT3-fs (sda4): mounted filesystem with writeback data mode
> done.
> Begin: Running /scripts/local-bottom ... done.
> Begin: Running /scripts/init-bottom ... done.
> INIT: version 2.88 booting
> [info] Using makefile-style concurrent boot in runlevel S.
> [....] Starting the hotplug events dispatcher: systemd-udevdstarting version 226
> . ok
> [....] Synthesizing the initial hotplug events...done.
> [....] Waiting for /dev to be fully populated...sd 4:0:0:0: Attached scsi gener0
> sd 4:0:2:0: Attached scsi generic sg1 type 0
> sd 3:0:0:0: Attached scsi generic sg2 type 0
> scsi_id(1192): unaligned access to 0x00000000faeeb009 at ip=0x00000000410039a7
> scsi_id(1193): unaligned access to 0x00000000faa1f009 at ip=0x00000000410039a7
>
> The above is with 4.0.8+.
I no longer think the panic had anything to do with unaligned accesses.
Attached is disassembly of blk_rq_map_sg in blk-merge.o. The error is here:
300: e8 00 a0 00 b,l 308 <blk_rq_map_sg+0x308>,rp
304: 08 1b 02 44 copy dp,r4
308: 08 04 02 5b copy r4,dp
30c: 08 1c 02 4a copy ret0,r10
310: 0d 40 10 dc ldd 0(r10),ret0
The call at 300 appears to be a call to sg_next:
Relocation section '.rela.text.blk_rq_map_sg' at offset 0x3d08 contains 14 entries:
Offset Info Type Sym. Value Sym. Name + Addend
00000000015c 002300000022 R_PARISC_DLTIND21 0000000000000000 node_data + 0
000000000168 000700000022 R_PARISC_DLTIND21 0000000000000001 __warned.22406 + 0
000000000178 002000000022 R_PARISC_DLTIND21 0000000000000000 .LC0 + 0
000000000204 002300000026 R_PARISC_DLTIND14 0000000000000000 node_data + 0
000000000300 00300000004a R_PARISC_PCREL22F 0000000000000000 sg_next + 0
0000000003a8 00300000004a R_PARISC_PCREL22F 0000000000000000 sg_next + 0
0000000003e0 003100000022 R_PARISC_DLTIND21 0000000000000000 pfnnid_map + 0
0000000003e4 003100000026 R_PARISC_DLTIND14 0000000000000000 pfnnid_map + 0
0000000003f8 002300000022 R_PARISC_DLTIND21 0000000000000000 node_data + 0
0000000003fc 002300000026 R_PARISC_DLTIND14 0000000000000000 node_data + 0
000000000574 000700000026 R_PARISC_DLTIND14 0000000000000001 __warned.22406 + 0
000000000588 002000000026 R_PARISC_DLTIND14 0000000000000000 .LC0 + 0
000000000590 00240000004a R_PARISC_PCREL22F 0000000000000000 printk + 0
0000000005bc 00320000004a R_PARISC_PCREL22F 0000000000000000 memset + 0
The result of the call ret0 is copied to r10 and then we get page fault executing ldd 0(r10),ret0.
Probably, we are in this block of code:
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
if (rq->cmd_flags & REQ_WRITE)
memset(q->dma_drain_buffer, 0, q->dma_drain_size);
sg_unmark_end(sg);
sg = sg_next(sg);
sg_set_page(sg, virt_to_page(q->dma_drain_buffer),
q->dma_drain_size,
((unsigned long)q->dma_drain_buffer) &
(PAGE_SIZE - 1));
nsegs++;
rq->extra_len += q->dma_drain_size;
}
Dave
--
John David Anglin dave.anglin@bell.net
["blk_rq_map_sg.dis.txt" (blk_rq_map_sg.dis.txt)]
Disassembly of section .text.blk_rq_map_sg:
0000000000000000 <blk_rq_map_sg>:
0: 08 03 02 41 copy r3,r1
4: 0f c2 12 c1 std rp,-10(sp)
8: 08 1e 02 43 copy sp,r3
c: 73 c1 02 68 std,ma r1,130(sp)
10: 70 72 00 80 std r18,40(r3)
14: 08 19 02 52 copy r25,r18
18: 70 71 00 90 std r17,48(r3)
1c: 08 1a 02 51 copy r26,r17
20: 70 70 00 a0 std r16,50(r3)
24: 70 6f 00 b0 std r15,58(r3)
28: 70 6e 00 c0 std r14,60(r3)
2c: 70 6d 00 d0 std r13,68(r3)
30: 70 6c 00 e0 std r12,70(r3)
34: 70 6b 00 f0 std r11,78(r3)
38: 70 6a 01 00 std r10,80(r3)
3c: 70 69 01 10 std r9,88(r3)
40: 70 68 01 20 std r8,90(r3)
44: 70 67 01 30 std r7,98(r3)
48: 70 66 01 40 std r6,a0(r3)
4c: 70 65 01 50 std r5,a8(r3)
50: 70 64 01 60 std r4,b0(r3)
54: 53 2b 00 d0 ldd 68(r25),r11
58: 9d 60 28 20 cmpb,*= r0,r11,470 <blk_rq_map_sg+0x470>
5c: 08 18 02 50 copy r24,r16
60: 51 7c 00 30 ldd 18(r11),ret0
64: c7 1c c1 b8 bb,*>= ret0,18,148 <blk_rq_map_sg+0x148>
68: 43 49 0b 58 ldb 5ac(r26),r9
6c: 45 7c 00 c0 ldh 60(r11),ret0
70: 87 80 27 f2 cmpib,=,n 0,ret0,470 <blk_rq_map_sg+0x470>
74: 51 77 00 d0 ldd 68(r11),r23
78: 49 7f 00 58 ldw 2c(r11),r31
7c: f3 ff 10 84 depd,z,* r31,59,60,r31
80: 0b f7 0a 18 add,l r23,r31,r24
84: 0f 10 10 95 ldw 8(r24),r21
88: 49 73 00 60 ldw 30(r11),r19
8c: 0a 75 04 14 sub r21,r19,r20
90: 0f 18 10 95 ldw c(r24),r21
94: 49 76 00 50 ldw 28(r11),r22
98: 0a 75 0a 13 add,l r21,r19,r19
9c: 0e 00 10 dc ldd 0(r16),ret0
a0: 0f f7 00 df ldd r23(r31),r31
a4: db f5 0b fe extrd,u,* r31,63,2,r21
a8: 0a 96 b8 80 cmpclr,>> r22,r20,r0
ac: 08 16 02 54 copy r22,r20
b0: be a0 27 88 cmpb,*<> r0,r21,47c <blk_rq_map_sg+0x47c>
b4: db 9c 0b fe extrd,u,* ret0,63,2,ret0
b8: 0b 9f 02 5c or r31,ret0,ret0
bc: 0e 13 12 90 stw r19,8(r16)
c0: 34 0e 00 02 ldi 1,r14
c4: 0e 1c 12 c0 std ret0,0(r16)
c8: 0e 14 12 98 stw r20,c(r16)
cc: 52 5c 00 80 ldd 40(r18),ret0
d0: db 80 cc 9f extrd,s,*>= ret0,36,1,r0
d4: e8 00 08 72 b,l,n 514 <blk_rq_map_sg+0x514>,r0
d8: 4a 3c 09 88 ldw 4c4(r17),ret0
dc: 8f 80 25 08 cmpib,<> 0,ret0,368 <blk_rq_map_sg+0x368>
e0: 08 1b 02 44 copy dp,r4
e4: 9e 00 20 1a cmpb,*=,n r0,r16,f8 <blk_rq_map_sg+0xf8>
e8: 0e 00 10 dc ldd 0(r16),ret0
ec: f7 80 04 1f depdi,* 0,63,1,ret0
f0: f7 9f 04 3f depdi,* -1,62,1,ret0
f4: 0e 1c 12 c0 std ret0,0(r16)
f8: 08 0e 02 5c copy r14,ret0
fc: 0c 61 10 c2 ldd -10(r3),rp
100: 50 72 00 80 ldd 40(r3),r18
104: 50 71 00 90 ldd 48(r3),r17
108: 50 70 00 a0 ldd 50(r3),r16
10c: 50 6f 00 b0 ldd 58(r3),r15
110: 50 6e 00 c0 ldd 60(r3),r14
114: 50 6d 00 d0 ldd 68(r3),r13
118: 50 6c 00 e0 ldd 70(r3),r12
11c: 50 6b 00 f0 ldd 78(r3),r11
120: 50 6a 01 00 ldd 80(r3),r10
124: 50 69 01 10 ldd 88(r3),r9
128: 50 68 01 20 ldd 90(r3),r8
12c: 50 67 01 30 ldd 98(r3),r7
130: 50 66 01 40 ldd a0(r3),r6
134: 50 65 01 50 ldd a8(r3),r5
138: 50 64 01 60 ldd b0(r3),r4
13c: 34 7e 00 80 ldo 40(r3),sp
140: e8 40 d0 00 bve (rp)
144: 53 c3 3f 8d ldd,mb -40(sp),r3
148: c6 dc 5e 57 bb,*<,n ret0,16,78 <blk_rq_map_sg+0x78>
14c: 51 77 00 d0 ldd 68(r11),r23
150: 37 c1 3f a1 ldo -30(sp),r1
154: 0c 61 12 d0 std r1,8(r3)
158: 34 0a 00 00 ldi 0,r10
15c: 2b 60 00 00 addil L%0,dp,r1
160: 70 61 00 20 std r1,10(r3)
164: 34 04 00 00 ldi 0,r4
168: 2b 60 00 00 addil L%0,dp,r1
16c: 34 1d 00 00 ldi 0,ret1
170: 70 61 00 40 std r1,20(r3)
174: 34 1f 00 00 ldi 0,r31
178: 2b 60 00 00 addil L%0,dp,r1
17c: 70 79 00 60 std r25,30(r3)
180: 34 0e 00 00 ldi 0,r14
184: 70 61 00 50 std r1,28(r3)
188: 70 78 00 30 std r24,18(r3)
18c: 49 6d 00 58 ldw 2c(r11),r13
190: 49 65 00 50 ldw 28(r11),r5
194: f0 cd 10 84 depd,z,* r13,59,60,r6
198: 9c a0 27 70 cmpb,*= r0,r5,558 <blk_rq_map_sg+0x558>
19c: 49 67 00 60 ldw 30(r11),r7
1a0: 51 73 00 d0 ldd 68(r11),r19
1a4: 08 d3 0a 1c add,l r19,r6,ret0
1a8: 0c d3 00 cf ldd r19(r6),r15
1ac: 0f 98 10 94 ldw c(ret0),r20
1b0: 0f 90 10 93 ldw 8(ret0),r19
1b4: 08 f4 0a 08 add,l r20,r7,r8
1b8: 08 f3 04 13 sub r19,r7,r19
1bc: d9 10 0b e0 extrd,u,* r8,63,32,r16
1c0: 08 13 02 4c copy r19,r12
1c4: 09 85 b8 80 cmpclr,>> r5,r12,r0
1c8: 08 05 02 4c copy r5,r12
1cc: 9d 40 26 30 cmpb,*= r0,r10,4ec <blk_rq_map_sg+0x4ec>
1d0: d9 92 0b e0 extrd,u,* r12,63,32,r18
1d4: 9d 20 22 22 cmpb,*=,n r0,r9,2ec <blk_rq_map_sg+0x2ec>
1d8: 0d 58 10 96 ldw c(r10),r22
1dc: 4a 3c 0a f8 ldw 57c(r17),ret0
1e0: 09 96 0a 16 add,l r22,r12,r22
1e4: 8b 96 a2 02 cmpb,>>,n r22,ret0,2ec <blk_rq_map_sg+0x2ec>
1e8: 0f e0 10 d5 ldd 0(r31),r21
1ec: 0d e0 10 dc ldd 0(r15),ret0
1f0: da b8 00 5d extrd,u,* r21,2,3,r24
1f4: db 9c 00 5d extrd,u,* ret0,2,3,ret0
1f8: f3 3c 10 63 depd,z,* ret0,60,61,r25
1fc: 50 61 00 20 ldd 10(r3),r1
200: f2 b8 10 63 depd,z,* r24,60,61,r21
204: 50 37 00 00 ldd 0(r1),r23
208: 0b 15 04 15 sub r21,r24,r21
20c: f2 b5 10 63 depd,z,* r21,60,61,r21
210: 0b 15 04 15 sub r21,r24,r21
214: 0b 99 04 18 sub r25,ret0,r24
218: f2 b5 10 c6 depd,z,* r21,57,58,r21
21c: 36 b9 1a 40 ldo d20(r21),r25
220: 0f 37 00 d9 ldd r23(r25),r25
224: 0b 3f 04 1f sub r31,r25,r31
228: db ff 1f 83 extrd,s,* r31,60,61,r31
22c: f3 3f 10 63 depd,z,* r31,60,61,r25
230: 0b f9 04 19 sub r25,r31,r25
234: f3 39 10 84 depd,z,* r25,59,60,r25
238: 0b f9 0a 19 add,l r25,r31,r25
23c: 0b f9 0a 99 shladd,l r25,2,r31,r25
240: f0 59 10 a5 depd,z,* r25,58,59,rp
244: f3 18 10 63 depd,z,* r24,60,61,r24
248: 36 b5 1a 60 ldo d30(r21),r21
24c: 0e b7 00 da ldd r23(r21),r26
250: 0b 22 04 19 sub rp,r25,r25
254: f0 59 11 ef depd,z,* r25,48,49,rp
258: 08 59 0a 19 add,l r25,rp,r25
25c: 0b 98 04 1c sub r24,ret0,ret0
260: f0 59 13 de depd,z,* r25,33,34,rp
264: f3 9c 10 c6 depd,z,* ret0,57,58,ret0
268: 08 59 0a 02 add,l r25,rp,rp
26c: 37 95 1a 40 ldo d20(ret0),r21
270: 0e b7 00 d5 ldd r23(r21),r21
274: 37 9c 1a 60 ldo d30(ret0),ret0
278: 0a af 04 15 sub r15,r21,r21
27c: 0f 97 00 dc ldd r23(ret0),ret0
280: da b5 1f 83 extrd,s,* r21,60,61,r21
284: f3 15 10 63 depd,z,* r21,60,61,r24
288: 0a b8 04 18 sub r24,r21,r24
28c: f3 18 10 84 depd,z,* r24,59,60,r24
290: 0a b8 0a 18 add,l r24,r21,r24
294: 0a b8 0a 98 shladd,l r24,2,r21,r24
298: f0 38 10 a5 depd,z,* r24,58,59,r1
29c: 0b 01 04 18 sub r1,r24,r24
2a0: f3 38 11 ef depd,z,* r24,48,49,r25
2a4: 0b e2 0a 42 shladd,l rp,1,r31,rp
2a8: 0b 38 0a 18 add,l r24,r25,r24
2ac: f0 42 10 63 depd,z,* rp,60,61,rp
2b0: f3 38 13 de depd,z,* r24,33,34,r25
2b4: 0b e2 04 02 sub rp,r31,rp
2b8: 0b 38 0a 1f add,l r24,r25,r31
2bc: 0b 42 0a 1a add,l rp,r26,r26
2c0: 0a bf 0a 5f shladd,l r31,1,r21,r31
2c4: f3 5a 11 8c depd,z,* r26,51,52,r26
2c8: f3 ff 10 63 depd,z,* r31,60,61,r31
2cc: 08 9a 0a 04 add,l r26,r4,r4
2d0: 0a bf 04 15 sub r31,r21,r21
2d4: 0b a4 0a 1d add,l r4,ret1,ret1
2d8: 0b 95 0a 15 add,l r21,ret0,r21
2dc: f3 95 11 8c depd,z,* r21,51,52,ret0
2e0: 0b 90 0a 1c add,l r16,ret0,ret0
2e4: 9f bc 24 10 cmpb,*= ret0,ret1,4f4 <blk_rq_map_sg+0x4f4>
2e8: 36 5f 3f ff ldo -1(r18),r31
2ec: 0d 40 10 dc ldd 0(r10),ret0
2f0: f7 80 04 3f depdi,* 0,62,1,ret0
2f4: 08 0a 02 5a copy r10,r26
2f8: 0d 5c 12 c0 std ret0,0(r10)
2fc: 0c 70 10 dd ldd 8(r3),ret1
300: e8 00 a0 00 b,l 308 <blk_rq_map_sg+0x308>,rp
304: 08 1b 02 44 copy dp,r4
308: 08 04 02 5b copy r4,dp
30c: 08 1c 02 4a copy ret0,r10
310: 0d 40 10 dc ldd 0(r10),ret0
314: d9 ff 0b fe extrd,u,* r15,63,2,r31
318: bf e0 22 b8 cmpb,*<> r0,r31,47c <blk_rq_map_sg+0x47c>
31c: db 9c 0b fe extrd,u,* ret0,63,2,ret0
320: 0b 8f 02 5c or r15,ret0,ret0
324: 35 ce 00 02 ldo 1(r14),r14
328: 0d 5c 12 c0 std ret0,0(r10)
32c: 0d 48 12 90 stw r8,8(r10)
330: d9 ce 0f e0 extrd,s,* r14,63,32,r14
334: 0d 4c 12 98 stw r12,c(r10)
338: 51 7c 00 30 ldd 18(r11),ret0
33c: 34 1f 05 00 ldi 280,r31
340: 0b fc 02 1c and ret0,r31,ret0
344: 9f 80 22 6a cmpb,*=,n r0,ret0,480 <blk_rq_map_sg+0x480>
348: 09 85 04 05 sub r5,r12,r5
34c: d8 a5 0b e0 extrd,u,* r5,63,32,r5
350: 9c a0 23 e8 cmpb,*= r0,r5,54c <blk_rq_map_sg+0x54c>
354: f0 cd 10 84 depd,z,* r13,59,60,r6
358: 08 12 02 5d copy r18,ret1
35c: 08 10 02 44 copy r16,r4
360: e8 1f 1c 75 b,l 1a0 <blk_rq_map_sg+0x1a0>,r0
364: 08 0f 02 5f copy r15,r31
368: 52 3c 01 70 ldd b8(r17),ret0
36c: 08 12 02 5a copy r18,r26
370: 37 dd 3f a1 ldo -30(sp),ret1
374: 53 82 00 20 ldd 10(ret0),rp
378: e8 40 f0 00 bve,l (rp),rp
37c: 53 9b 00 30 ldd 18(ret0),dp
380: 9f 80 3a bd cmpb,*= r0,ret0,e4 <blk_rq_map_sg+0xe4>
384: 08 04 02 5b copy r4,dp
388: 52 5c 00 80 ldd 40(r18),ret0
38c: c7 fc 44 38 bb,*< ret0,1f,5b0 <blk_rq_map_sg+0x5b0>
390: 34 19 00 00 ldi 0,r25
394: 0e 00 10 dc ldd 0(r16),ret0
398: f7 80 04 3f depdi,* 0,62,1,ret0
39c: 08 10 02 5a copy r16,r26
3a0: 0e 1c 12 c0 std ret0,0(r16)
3a4: 37 dd 3f a1 ldo -30(sp),ret1
3a8: e8 00 a0 00 b,l 3b0 <blk_rq_map_sg+0x3b0>,rp
3ac: 08 1b 02 44 copy dp,r4
3b0: 52 34 09 90 ldd 4c8(r17),r20
3b4: 08 1c 02 50 copy ret0,r16
3b8: f7 fe 0a 1c depdi,z,* f,15,4,r31
3bc: 23 80 08 01 ldil L%-40000000,ret0
3c0: 0b 94 0a 1c add,l r20,ret0,ret0
3c4: db 93 1a 6c extrd,u,* ret0,51,52,r19
3c8: 0b f3 02 15 and r19,r31,r21
3cc: 9e bf 23 f0 cmpb,*= r31,r21,5cc <blk_rq_map_sg+0x5cc>
3d0: 08 04 02 5b copy r4,dp
3d4: db 9c 08 20 extrd,u,* ret0,33,32,ret0
3d8: 34 1f 03 fe ldi 1ff,r31
3dc: 83 9f 83 e0 cmpb,<< r31,ret0,5d4 <blk_rq_map_sg+0x5d4>
3e0: 2b 60 00 00 addil L%0,dp,r1
3e4: 50 3f 00 00 ldd 0(r1),r31
3e8: 0f 9f 00 1c ldb r31(ret0),ret0
3ec: db 9f 0f f8 extrd,s,* ret0,63,8,r31
3f0: 0e 00 10 d5 ldd 0(r16),r21
3f4: f3 9f 10 63 depd,z,* r31,60,61,ret0
3f8: 2b 60 00 00 addil L%0,dp,r1
3fc: 50 37 00 00 ldd 0(r1),r23
400: 0b fc 04 1c sub ret0,r31,ret0
404: f3 9c 10 63 depd,z,* ret0,60,61,ret0
408: 4a 38 09 88 ldw 4c4(r17),r24
40c: 0b fc 04 1c sub ret0,r31,ret0
410: f3 9c 10 c6 depd,z,* ret0,57,58,ret0
414: 37 9f 1a 40 ldo d20(ret0),r31
418: 37 9c 1a 60 ldo d30(ret0),ret0
41c: 0f f7 00 df ldd r23(r31),r31
420: 0f 97 00 dc ldd r23(ret0),ret0
424: da b6 0b fe extrd,u,* r21,63,2,r22
428: 0b 93 04 13 sub r19,ret0,r19
42c: f2 b3 10 63 depd,z,* r19,60,61,r21
430: 0a 75 04 13 sub r21,r19,r19
434: 0b f3 0a dc shladd,l r19,3,r31,ret0
438: db 9f 0b fe extrd,u,* ret0,63,2,r31
43c: bf e0 20 70 cmpb,*<> r0,r31,47c <blk_rq_map_sg+0x47c>
440: d2 94 1b f4 extrw,u r20,31,12,r20
444: 0e 14 12 90 stw r20,8(r16)
448: 0b 96 02 5c or r22,ret0,ret0
44c: 35 ce 00 02 ldo 1(r14),r14
450: 0e 1c 12 c0 std ret0,0(r16)
454: d9 ce 0f e0 extrd,s,* r14,63,32,r14
458: 0e 18 12 98 stw r24,c(r16)
45c: 4a 5f 02 18 ldw 10c(r18),r31
460: 4a 3c 09 88 ldw 4c4(r17),ret0
464: 0b 9f 0a 1c add,l r31,ret0,ret0
468: e8 1f 18 ed b,l e4 <blk_rq_map_sg+0xe4>,r0
46c: 6a 5c 02 18 stw ret0,10c(r18)
470: 34 10 00 00 ldi 0,r16
474: e8 1f 18 a5 b,l cc <blk_rq_map_sg+0xcc>,r0
478: 34 0e 00 00 ldi 0,r14
47c: 03 ff e0 1f break 1f,1fff
480: 81 85 81 d0 cmpb,<< r5,r12,570 <blk_rq_map_sg+0x570>
484: 51 75 00 d0 ldd 68(r11),r21
488: 9e 40 3d 95 cmpb,*= r0,r18,358 <blk_rq_map_sg+0x358>
48c: 08 12 02 54 copy r18,r20
490: e8 00 00 18 b,l 4a4 <blk_rq_map_sg+0x4a4>,r0
494: 08 14 02 53 copy r20,r19
498: 9e 80 3d 65 cmpb,*= r0,r20,350 <blk_rq_map_sg+0x350>
49c: 08 14 02 53 copy r20,r19
4a0: f0 cd 10 84 depd,z,* r13,59,60,r6
4a4: 08 d5 0a 06 add,l r21,r6,r6
4a8: 0c d0 10 9f ldw 8(r6),r31
4ac: 0a 65 b8 80 cmpclr,>> r5,r19,r0
4b0: 08 05 02 53 copy r5,r19
4b4: 08 ff 04 1c sub r31,r7,ret0
4b8: 0b 93 b8 80 cmpclr,>> r19,ret0,r0
4bc: 08 13 02 5c copy r19,ret0
4c0: 0b 94 04 14 sub r20,ret0,r20
4c4: 0b 85 04 05 sub r5,ret0,r5
4c8: da 94 0b e0 extrd,u,* r20,63,32,r20
4cc: 08 fc 0a 1c add,l ret0,r7,ret0
4d0: d8 a5 0b e0 extrd,u,* r5,63,32,r5
4d4: 8b fc 3f 7d cmpb,<> ret0,r31,498 <blk_rq_map_sg+0x498>
4d8: db 87 0b e0 extrd,u,* ret0,63,32,r7
4dc: 35 ad 00 02 ldo 1(r13),r13
4e0: 34 07 00 00 ldi 0,r7
4e4: e8 1f 1f 5d b,l 498 <blk_rq_map_sg+0x498>,r0
4e8: d9 ad 0b e0 extrd,u,* r13,63,32,r13
4ec: e8 1f 1c 3d b,l 310 <blk_rq_map_sg+0x310>,r0
4f0: 50 6a 00 30 ldd 18(r3),r10
4f4: 52 3c 0a c0 ldd 560(r17),ret0
4f8: 0b 84 02 44 or r4,ret0,r4
4fc: 0b bf 0a 1d add,l r31,ret1,ret1
500: 0b 9d 02 5d or ret1,ret0,ret1
504: bc 9d 3b cf cmpb,*<>,n ret1,r4,2f0 <blk_rq_map_sg+0x2f0>
508: 0d 40 10 dc ldd 0(r10),ret0
50c: e8 1f 1c 4d b,l 338 <blk_rq_map_sg+0x338>,r0
510: 0d 56 12 98 stw r22,c(r10)
514: 4a 5c 00 b8 ldw 5c(r18),ret0
518: 4a 3f 09 a0 ldw 4d0(r17),r31
51c: 0b fc 02 13 and ret0,r31,r19
520: 86 60 37 6f cmpib,=,n 0,r19,dc <blk_rq_map_sg+0xdc>
524: 4a 3c 09 88 ldw 4c4(r17),ret0
528: 0e 18 10 93 ldw c(r16),r19
52c: 0b 9f 00 1c andcm r31,ret0,ret0
530: 37 9c 00 02 ldo 1(ret0),ret0
534: 0b 93 0a 1f add,l r19,ret0,r31
538: 0e 1f 12 98 stw r31,c(r16)
53c: 4a 5f 02 18 ldw 10c(r18),r31
540: 0b 9f 0a 1c add,l r31,ret0,ret0
544: e8 1f 17 1d b,l d8 <blk_rq_map_sg+0xd8>,r0
548: 6a 5c 02 18 stw ret0,10c(r18)
54c: 08 12 02 5d copy r18,ret1
550: 08 10 02 44 copy r16,r4
554: 08 0f 02 5f copy r15,r31
558: 0d 60 10 cb ldd 0(r11),r11
55c: bd 60 38 5f cmpb,*<>,n r0,r11,190 <blk_rq_map_sg+0x190>
560: 49 6d 00 58 ldw 2c(r11),r13
564: 50 72 00 60 ldd 30(r3),r18
568: e8 1f 16 bd b,l cc <blk_rq_map_sg+0xcc>,r0
56c: 08 0a 02 50 copy r10,r16
570: 50 61 00 40 ldd 20(r3),r1
574: 50 28 00 00 ldd 0(r1),r8
578: 0d 00 10 1c ldb 0(r8),ret0
57c: 8f 80 3e 0d cmpib,<> 0,ret0,488 <blk_rq_map_sg+0x488>
580: 50 61 00 50 ldd 28(r3),r1
584: 08 1b 02 44 copy dp,r4
588: 50 3a 00 00 ldd 0(r1),r26
58c: 0c 70 10 dd ldd 8(r3),ret1
590: e8 00 a0 00 b,l 598 <blk_rq_map_sg+0x598>,rp
594: 70 75 00 70 std r21,38(r3)
598: 08 04 02 5b copy r4,dp
59c: 03 ff e0 1f break 1f,1fff
5a0: 34 1c 00 02 ldi 1,ret0
5a4: 0d 1c 12 00 stb ret0,0(r8)
5a8: e8 1f 1d b5 b,l 488 <blk_rq_map_sg+0x488>,r0
5ac: 50 75 00 70 ldd 38(r3),r21
5b0: 08 1b 02 44 copy dp,r4
5b4: 52 3a 09 90 ldd 4c8(r17),r26
5b8: 37 dd 3f a1 ldo -30(sp),ret1
5bc: e8 00 a0 00 b,l 5c4 <blk_rq_map_sg+0x5c4>,rp
5c0: 4a 38 09 88 ldw 4c4(r17),r24
5c4: e8 1f 1b 95 b,l 394 <blk_rq_map_sg+0x394>,r0
5c8: 08 04 02 5b copy r4,dp
5cc: e8 1f 1c 3d b,l 3f0 <blk_rq_map_sg+0x3f0>,r0
5d0: 34 1f 00 00 ldi 0,r31
5d4: 03 ff e0 1f break 1f,1fff
--
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