On Thursday 14 February 2013, Stephen Warren wrote:
> On 02/14/2013 03:47 PM, Arnd Bergmann wrote:
> > Patch c08e20d24 "arm: Add v7_invalidate_l1 to cache-v7.S"
> > moves the v7_invalidate_l1 symbol out of imx/headsmp.S,
> > which seems to cause a link error because it is now
> > too far away from v7_cpu_resume when building an
> > allyesconfig kernel.
>
> Is the problem from the following in arch/arm/mach-imx/headsmp.S:
>
> ENTRY(v7_cpu_resume)
> bl v7_invalidate_l1
>
> Isn't the range of bl +/- 32MiB (or +/- 16MibB in Thumb 2). Is the
> kernel really that big? Sorry, I'm having trouble understanding what
> causes the problem.
Well, it is an "allyesconfig" kernel, so things can get pretty big:
$ size obj-tmp/vmlinux -A
obj-tmp/vmlinux :
section size addr
.head.text 504 3221258240
.text 32707336 3221258752
.text.head 8 3253966088
.rodata 14028722 3253968896
__bug_table 127764 3267997624
.builtin_fw 684 3268125388
__ksymtab 53424 3268126072
__ksymtab_gpl 43560 3268179496
__kcrctab 26712 3268223056
__kcrctab_gpl 21780 3268249768
__ksymtab_strings 233706 3268271548
__param 33104 3268505256
__modver 4104 3268538360
__ex_table 4112 3268542464
.ARM.unwind_idx 967784 3268546576
.ARM.unwind_tab 1452168 3269514360
.notes 36 3270966528
.init.text 677840 3270967296
.exit.text 125672 3271645136
.init.arch.info 5396 3271770808
.init.tagtable 72 3271776204
.init.smpalt 928 3271776276
.init.pv_table 1704 3271777204
.init.data 678108 3271778912
.exit.data 119 3272457020
.data..percpu 1460032 3272458240
.data 3370068 3273924608
.tcm_start 940 3277294676
.bss 8007724 3277295616
.comment 43 0
.ARM.attributes 50 0
.debug_line 15780363 0
.debug_info 57192143 0
.debug_abbrev 5747374 0
.debug_aranges 299608 0
.debug_ranges 5414592 0
.debug_frame 4801748 0
.debug_str 7003282 0
.debug_loc 36237476 0
Total 196510790
THUMB2 support is obviously enabled (allyesconfig), and from the start of the
.head.text section to the end of .bss, it is 64,045,100 bytes, using yesterday's
linux-next kernel with my fixes. It will get bigger as we add more stuff
to multiplatform. The .text section alone is just short of 32MB.
Arnd
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