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powerpc: Remove superflous function descriptors in assembly only code 

We have a number of places where we load the text address of a local
function and indirectly branch to it in assembly. Since it is an
indirect branch binutils will not know to use the function text
address, so that trick wont work.

There is no need for these functions to have a function descriptor
so we can replace it with a label and remove the dot symbol.

Signed-off-by: Anton Blanchard <anton@samba.org>
This commit is contained in:
Anton Blanchard 2014-02-04 16:04:52 +11:00
parent b1576fec7f
commit ad0289e4ac
4 changed files with 21 additions and 20 deletions
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10
arch/powerpc/kernel/entry_64.S
View File

@ -1021,7 +1021,7 @@ _GLOBAL(enter_rtas)
std r6,PACASAVEDMSR(r13)
/* Setup our real return addr */
LOAD_REG_ADDR(r4,.rtas_return_loc)
LOAD_REG_ADDR(r4,rtas_return_loc)
clrldi r4,r4,2 /* convert to realmode address */
mtlr r4
@ -1045,7 +1045,7 @@ _GLOBAL(enter_rtas)
rfid
b . /* prevent speculative execution */
_STATIC(rtas_return_loc)
rtas_return_loc:
FIXUP_ENDIAN
/* relocation is off at this point */
@ -1054,7 +1054,7 @@ _STATIC(rtas_return_loc)
bcl 20,31,$+4
0: mflr r3
ld r3,(1f-0b)(r3) /* get &.rtas_restore_regs */
ld r3,(1f-0b)(r3) /* get &rtas_restore_regs */
mfmsr r6
li r0,MSR_RI
@ -1071,9 +1071,9 @@ _STATIC(rtas_return_loc)
b . /* prevent speculative execution */
.align 3
1: .llong .rtas_restore_regs
1: .llong rtas_restore_regs
_STATIC(rtas_restore_regs)
rtas_restore_regs:
/* relocation is on at this point */
REST_GPR(2, r1) /* Restore the TOC */
REST_GPR(13, r1) /* Restore paca */

18
arch/powerpc/kernel/exceptions-64s.S
View File

@ -214,13 +214,13 @@ data_access_slb_pSeries:
b slb_miss_realmode
#else
/*
* We can't just use a direct branch to .slb_miss_realmode
* We can't just use a direct branch to slb_miss_realmode
* because the distance from here to there depends on where
* the kernel ends up being put.
*/
mfctr r11
ld r10,PACAKBASE(r13)
LOAD_HANDLER(r10, .slb_miss_realmode)
LOAD_HANDLER(r10, slb_miss_realmode)
mtctr r10
bctr
#endif
@ -247,7 +247,7 @@ instruction_access_slb_pSeries:
#else
mfctr r11
ld r10,PACAKBASE(r13)
LOAD_HANDLER(r10, .slb_miss_realmode)
LOAD_HANDLER(r10, slb_miss_realmode)
mtctr r10
bctr
#endif
@ -524,7 +524,7 @@ do_stab_bolted_pSeries:
std r12,PACA_EXSLB+EX_R12(r13)
GET_SCRATCH0(r10)
std r10,PACA_EXSLB+EX_R13(r13)
EXCEPTION_PROLOG_PSERIES_1(.do_stab_bolted, EXC_STD)
EXCEPTION_PROLOG_PSERIES_1(do_stab_bolted, EXC_STD)
KVM_HANDLER_SKIP(PACA_EXGEN, EXC_STD, 0x300)
KVM_HANDLER_SKIP(PACA_EXSLB, EXC_STD, 0x380)
@ -832,13 +832,13 @@ data_access_slb_relon_pSeries:
b slb_miss_realmode
#else
/*
* We can't just use a direct branch to .slb_miss_realmode
* We can't just use a direct branch to slb_miss_realmode
* because the distance from here to there depends on where
* the kernel ends up being put.
*/
mfctr r11
ld r10,PACAKBASE(r13)
LOAD_HANDLER(r10, .slb_miss_realmode)
LOAD_HANDLER(r10, slb_miss_realmode)
mtctr r10
bctr
#endif
@ -858,7 +858,7 @@ instruction_access_slb_relon_pSeries:
#else
mfctr r11
ld r10,PACAKBASE(r13)
LOAD_HANDLER(r10, .slb_miss_realmode)
LOAD_HANDLER(r10, slb_miss_realmode)
mtctr r10
bctr
#endif
@ -1468,7 +1468,7 @@ machine_check_handle_early:
* r3 is saved in paca->slb_r3
* We assume we aren't going to take any exceptions during this procedure.
*/
_GLOBAL(slb_miss_realmode)
slb_miss_realmode:
mflr r10
#ifdef CONFIG_RELOCATABLE
mtctr r11
@ -1646,7 +1646,7 @@ do_ste_alloc:
* We assume (DAR >> 60) == 0xc.
*/
.align 7
_GLOBAL(do_stab_bolted)
do_stab_bolted:
stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
std r11,PACA_EXSLB+EX_SRR0(r13) /* save SRR0 in exc. frame */
mfspr r11,SPRN_DAR /* ea */

9
arch/powerpc/kernel/head_64.S
View File

@ -639,7 +639,7 @@ __secondary_start:
stb r0,PACAIRQHAPPENED(r13)
/* enable MMU and jump to start_secondary */
LOAD_REG_ADDR(r3, .start_secondary_prolog)
LOAD_REG_ADDR(r3, start_secondary_prolog)
LOAD_REG_IMMEDIATE(r4, MSR_KERNEL)
mtspr SPRN_SRR0,r3
@ -652,7 +652,7 @@ __secondary_start:
* zero the stack back-chain pointer and get the TOC virtual address
* before going into C code.
*/
_GLOBAL(start_secondary_prolog)
start_secondary_prolog:
ld r2,PACATOC(r13)
li r3,0
std r3,0(r1) /* Zero the stack frame pointer */
@ -778,7 +778,7 @@ _INIT_STATIC(start_here_multiplatform)
mr r3,r31
bl early_setup /* also sets r13 and SPRG_PACA */
LOAD_REG_ADDR(r3, .start_here_common)
LOAD_REG_ADDR(r3, start_here_common)
ld r4,PACAKMSR(r13)
mtspr SPRN_SRR0,r3
mtspr SPRN_SRR1,r4
@ -786,7 +786,8 @@ _INIT_STATIC(start_here_multiplatform)
b . /* prevent speculative execution */
/* This is where all platforms converge execution */
_INIT_GLOBAL(start_here_common)
start_here_common:
/* relocation is on at this point */
std r1,PACAKSAVE(r13)

4
arch/powerpc/platforms/powernv/opal-wrappers.S
View File

@ -32,7 +32,7 @@
std r12,PACASAVEDMSR(r13); \
andc r12,r12,r0; \
mtmsrd r12,1; \
LOAD_REG_ADDR(r0,.opal_return); \
LOAD_REG_ADDR(r0,opal_return); \
mtlr r0; \
li r0,MSR_DR|MSR_IR|MSR_LE;\
andc r12,r12,r0; \
@ -44,7 +44,7 @@
mtspr SPRN_HSRR0,r12; \
hrfid
_STATIC(opal_return)
opal_return:
/*
* Fixup endian on OPAL return... we should be able to simplify
* this by instead converting the below trampoline to a set of