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[IA64] ia64/pv_ops/pv_cpu_ops: fix _IA64_REG_IP case.

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pv_cpu_ops.getreg(_IA64_REG_IP) returned constant.
But the returned ip valued should be the one in the caller, not of the callee.
This patch fixes that.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Isaku Yamahata 2008-11-18 19:19:50 +09:00 committed by Tony Luck
parent d596410776
commit 93fe10b670
3 changed files with 15 additions and 2 deletions
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2
arch/ia64/include/asm/intrinsics.h
View file

@ -226,7 +226,7 @@ extern long ia64_cmpxchg_called_with_bad_pointer (void);
/************************************************/
#define ia64_ssm IA64_INTRINSIC_MACRO(ssm)
#define ia64_rsm IA64_INTRINSIC_MACRO(rsm)
#define ia64_getreg IA64_INTRINSIC_API(getreg)
#define ia64_getreg IA64_INTRINSIC_MACRO(getreg)
#define ia64_setreg IA64_INTRINSIC_API(setreg)
#define ia64_set_rr IA64_INTRINSIC_API(set_rr)
#define ia64_get_rr IA64_INTRINSIC_API(get_rr)

13
arch/ia64/include/asm/paravirt_privop.h
View file

@ -78,6 +78,19 @@ extern unsigned long ia64_native_getreg_func(int regnum);
ia64_native_rsm(mask); \
} while (0)
/* returned ip value should be the one in the caller,
* not in __paravirt_getreg() */
#define paravirt_getreg(reg) \
({ \
unsigned long res; \
BUILD_BUG_ON(!__builtin_constant_p(reg)); \
if ((reg) == _IA64_REG_IP) \
res = ia64_native_getreg(_IA64_REG_IP); \
else \
res = pv_cpu_ops.getreg(reg); \
res; \
})
/******************************************************************************
* replacement of hand written assembly codes.
*/

2
arch/ia64/kernel/paravirt.c
View file

@ -130,7 +130,7 @@ ia64_native_getreg_func(int regnum)
unsigned long res = -1;
switch (regnum) {
CASE_GET_REG(GP);
CASE_GET_REG(IP);
/*CASE_GET_REG(IP);*/ /* returned ip value shouldn't be constant */
CASE_GET_REG(PSR);
CASE_GET_REG(TP);
CASE_GET_REG(SP);