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ppc: Loose GOT access in IRQ

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Using the GOT in IRQ handlers requires r14 to be -ffixed-r14.
Avoid this by relocatate transfer_to_handler too.
This will allow to free up r14 later on.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
This commit is contained in:
Joakim Tjernlund
2010-01-19 14:41:55 +01:00
committed by Wolfgang Denk
parent 2903ad33a7
commit fc4e188789
15 changed files with 108 additions and 407 deletions
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47
include/ppc_asm.tmpl
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@@ -257,46 +257,43 @@
* OFFSET values only; they must be relocated first before they can
* be used!
*/
#define STD_EXCEPTION(n, label, hdlr) \
. = n; \
label: \
EXCEPTION_PROLOG(SRR0, SRR1); \
lwz r3,GOT(transfer_to_handler); \
mtlr r3; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
li r20,MSR_KERNEL; \
#define COPY_EE(d, s) rlwimi d,s,0,16,16
#define NOCOPY(d, s)
#define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \
bl 1f; \
1: mflr r20; \
lwz r20,(.L_ ## label)-1b+8(r20); \
mtlr r20; \
li r20,msr; \
copyee(r20,r23); \
rlwimi r20,r23,0,25,25; \
blrl; \
.L_ ## label : \
.long hdlr - _start + _START_OFFSET; \
.long int_return - _start + _START_OFFSET
.long int_return - _start + _START_OFFSET; \
.long transfer_to_handler - _start + _START_OFFSET
#define STD_EXCEPTION(n, label, hdlr) \
. = n; \
label: \
EXCEPTION_PROLOG(SRR0, SRR1); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \
#define CRIT_EXCEPTION(n, label, hdlr) \
. = n; \
label: \
EXCEPTION_PROLOG(CSRR0, CSRR1); \
lwz r3,GOT(transfer_to_handler); \
mtlr r3; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
li r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \
rlwimi r20,r23,0,25,25; \
blrl; \
.L_ ## label : \
.long hdlr - _start + _START_OFFSET; \
.long crit_return - _start + _START_OFFSET
EXC_XFER_TEMPLATE(label, hdlr, \
MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
#define MCK_EXCEPTION(n, label, hdlr) \
. = n; \
label: \
EXCEPTION_PROLOG(MCSRR0, MCSRR1); \
lwz r3,GOT(transfer_to_handler); \
mtlr r3; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
li r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \
rlwimi r20,r23,0,25,25; \
blrl; \
.L_ ## label : \
.long hdlr - _start + _START_OFFSET; \
.long mck_return - _start + _START_OFFSET
EXC_XFER_TEMPLATE(label, hdlr, \
MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \
#endif /* __PPC_ASM_TMPL__ */