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Fix the PowerPC DTrace copy functions. The kernel doesn't hold the same view to

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the user map, so use the md copy in/out functions provided by the kernel.

MFC with:	r242723
This commit is contained in:
Justin Hibbits 2013-02-03 00:19:34 +00:00
parent c0e7a46dd2
commit 7e7a9efdb5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=246275
2 changed files with 61 additions and 66 deletions
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44
sys/cddl/dev/dtrace/powerpc/dtrace_asm.S
View File

@ -19,6 +19,8 @@
*
* CDDL HEADER END
*
* Portions Copyright 2012,2013 Justin Hibbits <jhibbits@freebsd.org>
*
* $FreeBSD$
*/
/*
@ -113,48 +115,6 @@ dtrace_fulword(void *addr)
ASENTRY_NOPROF(dtrace_fulword)
END(dtrace_fulword)
/*
uint8_t
dtrace_fuword8_nocheck(void *addr)
*/
ASENTRY_NOPROF(dtrace_fuword8_nocheck)
lbz %r3,0(%r3)
blr
END(dtrace_fuword8_nocheck)
/*
uint16_t
dtrace_fuword16_nocheck(void *addr)
*/
ASENTRY_NOPROF(dtrace_fuword16_nocheck)
lhz %r3,0(%r3)
blr
END(dtrace_fuword16_nocheck)
/*
uint32_t
dtrace_fuword32_nocheck(void *addr)
*/
ASENTRY_NOPROF(dtrace_fuword32_nocheck)
lwz %r3,0(%r3)
blr
END(dtrace_fuword32_nocheck)
/*
uint64_t
dtrace_fuword64_nocheck(void *addr)
*/
ASENTRY_NOPROF(dtrace_fuword64_nocheck)
#if defined(__powerpc64__)
ld %r3,0(%r3)
#else
lwz %r5,0(%r3)
lwz %r4,4(%r3)
mr %r3,%r5
#endif
blr
END(dtrace_fuword64_nocheck)
/*
XXX: unoptimized
void

83
sys/cddl/dev/dtrace/powerpc/dtrace_isa.c
View File

@ -19,6 +19,8 @@
*
* CDDL HEADER END
*
* Portions Copyright 2012,2013 Justin Hibbits <jhibbits@freebsd.org>
*
* $FreeBSD$
*/
/*
@ -45,11 +47,6 @@
#include "regset.h"
uint8_t dtrace_fuword8_nocheck(void *);
uint16_t dtrace_fuword16_nocheck(void *);
uint32_t dtrace_fuword32_nocheck(void *);
uint64_t dtrace_fuword64_nocheck(void *);
/* Offset to the LR Save word (ppc32) */
#define RETURN_OFFSET 4
#define RETURN_OFFSET64 8
@ -462,31 +459,63 @@ dtrace_copyin(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(uaddr, kaddr, size);
if (copyin((const void *)uaddr, (void *)kaddr, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
void
dtrace_copyout(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(kaddr, uaddr, size);
if (dtrace_copycheck(uaddr, kaddr, size)) {
if (copyout((const void *)kaddr, (void *)uaddr, size)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
}
void
dtrace_copyinstr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(uaddr, kaddr, size, flags);
size_t actual;
int error;
if (dtrace_copycheck(uaddr, kaddr, size)) {
error = copyinstr((const void *)uaddr, (void *)kaddr,
size, &actual);
/* ENAMETOOLONG is not a fault condition. */
if (error && error != ENAMETOOLONG) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
}
/*
* The bulk of this function could be replaced to match dtrace_copyinstr()
* if we ever implement a copyoutstr().
*/
void
dtrace_copyoutstr(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(kaddr, uaddr, size, flags);
size_t len;
if (dtrace_copycheck(uaddr, kaddr, size)) {
len = strlen((const char *)kaddr);
if (len > size)
len = size;
if (copyout((const void *)kaddr, (void *)uaddr, len)) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
}
uint8_t
@ -497,18 +526,21 @@ dtrace_fuword8(void *uaddr)
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword8_nocheck(uaddr));
return (fubyte(uaddr));
}
uint16_t
dtrace_fuword16(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
uint16_t ret = 0;
if (dtrace_copycheck((uintptr_t)uaddr, (uintptr_t)&ret, sizeof(ret))) {
if (copyin((const void *)uaddr, (void *)&ret, sizeof(ret))) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
return (dtrace_fuword16_nocheck(uaddr));
return ret;
}
uint32_t
@ -519,16 +551,19 @@ dtrace_fuword32(void *uaddr)
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword32_nocheck(uaddr));
return (fuword32(uaddr));
}
uint64_t
dtrace_fuword64(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
uint64_t ret = 0;
if (dtrace_copycheck((uintptr_t)uaddr, (uintptr_t)&ret, sizeof(ret))) {
if (copyin((const void *)uaddr, (void *)&ret, sizeof(ret))) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
}
}
return (dtrace_fuword64_nocheck(uaddr));
return ret;
}