Re: [BUG mips llvm] MIPS: malformed R_MIPS_{HI16,LO16} with LLVM

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On Mon, Jan 11, 2021 at 12:50 PM Alexander Lobakin <alobakin@xxxxx> wrote:
>
> > The disassembly for me produces:
> >     399c: 3c 03 00 00   lui     $3, 0 <phy_device_free>
> >                         0000399c:  R_MIPS_HI16  .text
> > ...
> >     39a8: 24 63 3a 5c   addiu   $3, $3, 14940 <phy_probe>
> >                         000039a8:  R_MIPS_LO16  .text
>
> So, in your case the values of the instructions that relocs refer are:
>
> 0x3c030000 R_MIPS_HI16
> 0x24633a5c R_MIPS_LO16
>
> Mine were:
>
> 0x3c010000
> 0x24339444
>
> Your second one doesn't have bit 15 set, so I think this pair won't
> break the code.
> Try to hunt for R_MIPS_LO16 that have this bit set, i.e. they have
> '8', '9', 'a', 'b', 'c', 'd' or 'e' as their [15:12].

I don't think any of my R_MIPS_LO16 in that file have that bit set.
See attached.
-- 
Thanks,
~Nick Desaulniers
			0000004c:  R_MIPS_LO16	kmalloc_caches
			00000088:  R_MIPS_LO16	.data
			00000098:  R_MIPS_LO16	.data
			0000010c:  R_MIPS_LO16	kmalloc_caches
			00000130:  R_MIPS_LO16	$.str
			0000014c:  R_MIPS_LO16	.data
			0000015c:  R_MIPS_LO16	.data
			000001c4:  R_MIPS_LO16	kmalloc_caches
			00000204:  R_MIPS_LO16	.data
			00000214:  R_MIPS_LO16	.data
			00000290:  R_MIPS_LO16	.data
			000002a0:  R_MIPS_LO16	.data
			000002a4:  R_MIPS_LO16	.data
			00000384:  R_MIPS_LO16	.data
			00000394:  R_MIPS_LO16	.data
			00000398:  R_MIPS_LO16	.data
			000003ac:  R_MIPS_LO16	$.str
			00000474:  R_MIPS_LO16	.data
			00000484:  R_MIPS_LO16	.data
			00000488:  R_MIPS_LO16	.data
			0000055c:  R_MIPS_LO16	kmalloc_caches
			00000588:  R_MIPS_LO16	mdio_bus_type
			000005a4:  R_MIPS_LO16	.text
			000005a8:  R_MIPS_LO16	.text
			000005ac:  R_MIPS_LO16	.text
			000005b4:  R_MIPS_LO16	.rodata
			00000638:  R_MIPS_LO16	$.str.1
			0000065c:  R_MIPS_LO16	$.str.2
			00000664:  R_MIPS_LO16	.sbss
			00000684:  R_MIPS_LO16	delayed_work_timer_fn
			00000688:  R_MIPS_LO16	phy_state_machine
			00000998:  R_MIPS_LO16	$.str.62
			000009f8:  R_MIPS_LO16	$.str.63
			00000a50:  R_MIPS_LO16	__stack_chk_guard
			00000d84:  R_MIPS_LO16	__stack_chk_guard
			00000e3c:  R_MIPS_LO16	$.str.3
			00000e4c:  R_MIPS_LO16	$.str.4
			00000ea4:  R_MIPS_LO16	.data
			00000eb4:  R_MIPS_LO16	.data
			00000eb8:  R_MIPS_LO16	.data
			00000ed0:  R_MIPS_LO16	$.str
			00001164:  R_MIPS_LO16	.text
			000011ac:  R_MIPS_LO16	$.str.19
			000011c8:  R_MIPS_LO16	$.str.18
			000011f4:  R_MIPS_LO16	genphy_c45_driver
			000011fc:  R_MIPS_LO16	.data
			00001280:  R_MIPS_LO16	.data
			000013e4:  R_MIPS_LO16	$.str.15
			00001404:  R_MIPS_LO16	$.str.16
			00001444:  R_MIPS_LO16	$.str.14
			0000145c:  R_MIPS_LO16	$.str.17
			00001478:  R_MIPS_LO16	$.str.64
			000014c0:  R_MIPS_LO16	mdio_bus_type
			000014c8:  R_MIPS_LO16	device_match_name
			00001568:  R_MIPS_LO16	$.str.5
			000015f4:  R_MIPS_LO16	__stack_chk_guard
			00001624:  R_MIPS_LO16	$.str.18
			0000162c:  R_MIPS_LO16	$.str.19
			00001648:  R_MIPS_LO16	.data
			00001660:  R_MIPS_LO16	.rodata
			00001668:  R_MIPS_LO16	.rodata
			0000170c:  R_MIPS_LO16	.data
			0000173c:  R_MIPS_LO16	genphy_c45_driver
			00001794:  R_MIPS_LO16	__stack_chk_guard
			00001900:  R_MIPS_LO16	__stack_chk_guard
			00001930:  R_MIPS_LO16	$.str.7
			0000193c:  R_MIPS_LO16	$.str.6
			00001944:  R_MIPS_LO16	$.str.8
			0000195c:  R_MIPS_LO16	$.str.9
			00001984:  R_MIPS_LO16	$.str.10
			0000198c:  R_MIPS_LO16	$.str.11
			00001998:  R_MIPS_LO16	$.str.12
			000019b0:  R_MIPS_LO16	__stack_chk_guard
			00001a10:  R_MIPS_LO16	__stack_chk_guard
			00001a1c:  R_MIPS_LO16	$.str.10
			00001a24:  R_MIPS_LO16	$.str.11
			00001a50:  R_MIPS_LO16	$.str.7
			00001a5c:  R_MIPS_LO16	$.str.6
			00001a64:  R_MIPS_LO16	$.str.8
			00001a80:  R_MIPS_LO16	$.str.9
			00001ab0:  R_MIPS_LO16	$.str.12
			00001ae0:  R_MIPS_LO16	$.str.13
			00001b0c:  R_MIPS_LO16	__stack_chk_guard
			00001b5c:  R_MIPS_LO16	__stack_chk_guard
			00001b88:  R_MIPS_LO16	$.str.7
			00001b94:  R_MIPS_LO16	$.str.6
			00001b9c:  R_MIPS_LO16	$.str.8
			00001bb4:  R_MIPS_LO16	$.str.9
			00001bc4:  R_MIPS_LO16	__stack_chk_guard
			00001d60:  R_MIPS_LO16	mdio_bus_type
			00001d68:  R_MIPS_LO16	device_match_name
			00001dec:  R_MIPS_LO16	$.str.5
			00001e34:  R_MIPS_LO16	.data
			00001e90:  R_MIPS_LO16	genphy_c45_driver
			00001f70:  R_MIPS_LO16	kmalloc_caches
			000020dc:  R_MIPS_LO16	.text
			00002218:  R_MIPS_LO16	__stack_chk_guard
			00002224:  R_MIPS_LO16	.rodata
			00002248:  R_MIPS_LO16	.rodata
			000022d0:  R_MIPS_LO16	__stack_chk_guard
			00002658:  R_MIPS_LO16	.rodata
			00002870:  R_MIPS_LO16	$.str.66
			00002c88:  R_MIPS_LO16	$.str.21
			00002ca0:  R_MIPS_LO16	$.str.20
			00003218:  R_MIPS_LO16	$.str.67
			00003220:  R_MIPS_LO16	$__func__.phy_poll_reset
			000033fc:  R_MIPS_LO16	__stack_chk_guard
			00003474:  R_MIPS_LO16	__stack_chk_guard
			000034c0:  R_MIPS_LO16	__stack_chk_guard
			00003510:  R_MIPS_LO16	__stack_chk_guard
			00003628:  R_MIPS_LO16	__stack_chk_guard
			00003688:  R_MIPS_LO16	__stack_chk_guard
			00003778:  R_MIPS_LO16	__stack_chk_guard
			00003790:  R_MIPS_LO16	$.str.22
			000037d0:  R_MIPS_LO16	$.str.23
			000038c0:  R_MIPS_LO16	__stack_chk_guard
			00003904:  R_MIPS_LO16	$.str.24
			00003920:  R_MIPS_LO16	$.str.25
			00003938:  R_MIPS_LO16	__stack_chk_guard
			000039a4:  R_MIPS_LO16	mdio_bus_type
			000039a8:  R_MIPS_LO16	.text
			000039ac:  R_MIPS_LO16	.text
			000039b0:  R_MIPS_LO16	.text
			00003a18:  R_MIPS_LO16	$.str.28
			00003a30:  R_MIPS_LO16	$.str.26
			00003a50:  R_MIPS_LO16	$.str.27
			00003a78:  R_MIPS_LO16	__stack_chk_guard
			00003c84:  R_MIPS_LO16	__stack_chk_guard
			00003e9c:  R_MIPS_LO16	$.str.31
			00003ee4:  R_MIPS_LO16	.rodata
			00003f00:  R_MIPS_LO16	$.str.33
			00003f08:  R_MIPS_LO16	$.str.59
			00003f10:  R_MIPS_LO16	$.str.34
			00003f3c:  R_MIPS_LO16	$.str.61
			00003f78:  R_MIPS_LO16	__stack_chk_guard
			00004014:  R_MIPS_LO16	.rodata
			00004038:  R_MIPS_LO16	.rodata
			000040ec:  R_MIPS_LO16	__stack_chk_guard
			000042e8:  R_MIPS_LO16	$.str.61
			00000010:  R_MIPS_LO16	genphy_c45_driver
			0000001c:  R_MIPS_LO16	.data
			00000028:  R_MIPS_LO16	.rodata
			00000030:  R_MIPS_LO16	phy_basic_t1_features
			00000044:  R_MIPS_LO16	phy_gbit_features
			00000048:  R_MIPS_LO16	phy_gbit_fibre_features
			00000054:  R_MIPS_LO16	phy_gbit_all_ports_features
			00000060:  R_MIPS_LO16	phy_10gbit_features
			00000074:  R_MIPS_LO16	phy_10gbit_full_features
			00000084:  R_MIPS_LO16	phy_basic_t1_features
			00000090:  R_MIPS_LO16	phy_basic_features
			00000098:  R_MIPS_LO16	phy_basic_features
			0000009c:  R_MIPS_LO16	phy_basic_t1_features
			000000a4:  R_MIPS_LO16	phy_gbit_features
			000000a8:  R_MIPS_LO16	phy_gbit_fibre_features
			000000ac:  R_MIPS_LO16	phy_gbit_all_ports_features
			000000b0:  R_MIPS_LO16	phy_10gbit_features
			000000b8:  R_MIPS_LO16	phy_10gbit_full_features
			000000c0:  R_MIPS_LO16	phy_10gbit_fec_features
			000000cc:  R_MIPS_LO16	phy_10gbit_fec_features
			000000d4:  R_MIPS_LO16	genphy_c45_driver
			000000f0:  R_MIPS_LO16	.data
			00000110:  R_MIPS_LO16	genphy_c45_driver

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