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| author | David S. Miller <davem@davemloft.net> | 2009-02-08 22:00:55 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-08 22:00:55 -0800 |
| commit | 40bdac7dbc161639a498697f34fbd1ee800e51f4 (patch) | |
| tree | 5eef654722ba36d2921cafd8440d5e346f0fbdb5 /arch/sparc/kernel | |
| parent | 1c2f61d40b691789626489fa947a3e003c9a84be (diff) | |
sparc64: Kill .fixup section bloat.
This is an implementation of a suggestion made by Chris Torek:
--------------------
Something else I noticed in passing: the EX and EX_LD/EX_ST macros
scattered throughout the various .S files make a fair bit of .fixup
code, all of which does the same thing. At the cost of one symbol
in copy_in_user.S, you could just have one common two-instruction
retl-and-mov-1 fixup that they all share.
--------------------
The following is with a defconfig build:
text data bss dec hex filename
3972767 344024 584449 4901240 4ac978 vmlinux.orig
3968887 344024 584449 4897360 4aba50 vmlinux
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/head_64.S | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S index 8ffee714f93..a46c3a21e26 100644 --- a/arch/sparc/kernel/head_64.S +++ b/arch/sparc/kernel/head_64.S @@ -891,10 +891,35 @@ prom_tba: .xword 0 tlb_type: .word 0 /* Must NOT end up in BSS */ .section ".fixup",#alloc,#execinstr - .globl __ret_efault, __retl_efault -__ret_efault: + .globl __ret_efault, __retl_efault, __ret_one, __retl_one +ENTRY(__ret_efault) ret restore %g0, -EFAULT, %o0 -__retl_efault: +ENDPROC(__ret_efault) + +ENTRY(__retl_efault) retl mov -EFAULT, %o0 +ENDPROC(__retl_efault) + +ENTRY(__retl_one) + retl + mov 1, %o0 +ENDPROC(__retl_one) + +ENTRY(__ret_one_asi) + wr %g0, ASI_AIUS, %asi + ret + restore %g0, 1, %o0 +ENDPROC(__ret_one_asi) + +ENTRY(__retl_one_asi) + wr %g0, ASI_AIUS, %asi + retl + mov 1, %o0 +ENDPROC(__retl_one_asi) + +ENTRY(__retl_o1) + retl + mov %o1, %o0 +ENDPROC(__retl_o1) |