| Message ID | 1458141183-27207-6-git-send-email-lvivier@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 16.03.2016 16:13, Laurent Vivier wrote: > For lswx in little-endian mode, an alignment interrupt occurs. > > Signed-off-by: Laurent Vivier <lvivier@redhat.com> > --- > powerpc/emulator.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/powerpc/emulator.c b/powerpc/emulator.c > index dfe5859..3a8f17e 100644 > --- a/powerpc/emulator.c > +++ b/powerpc/emulator.c > @@ -6,6 +6,7 @@ > #include <asm/processor.h> > > static int volatile is_invalid; > +static int volatile alignment; > > static void program_check_handler(struct pt_regs *regs, void *opaque) > { > @@ -19,6 +20,18 @@ static void program_check_handler(struct pt_regs *regs, void *opaque) > regs->nip += 4; > } > > +static void alignment_handler(struct pt_regs *regs, void *opaque) > +{ > + int *data = opaque; > + > + printf("Detected alignment exception 0x%016lx: %08x\n", > + regs->nip, *(uint32_t*)regs->nip); > + > + *data = 1; > + > + regs->nip += 4; > +} > + > static void test_illegal(void) > { > report_prefix_push("invalid"); > @@ -62,6 +75,8 @@ static void test_64bit(void) > * - RT <= RA or RB < RT + (n + 4) is invalid or result is undefined > * - RT == RA == 0 is invalid > * > + * For lswx in little-endian mode, an alignment interrupt always occurs. > + * > */ > > #define SPR_XER 1 > @@ -81,6 +96,7 @@ static void test_lswx(void) > > /* check incomplete register filling */ > > + alignment = 0; > asm volatile ("mtspr %[XER], %[len];" > "li r12,-1;" > "mr r11, r12;" > @@ -98,7 +114,12 @@ static void test_lswx(void) > */ > "xer", "r11", "r12"); > > +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ > + report("alignment", alignment); > + return; > +#else > report("partial", regs[0] == 0x01020300 && regs[1] == (uint64_t)-1); > +#endif > > /* check an old know bug: the number of bytes is used as > * the number of registers, so try 32 bytes. > @@ -195,6 +216,7 @@ static void test_lswx(void) > int main(void) > { > handle_exception(0x700, program_check_handler, (void *)&is_invalid); > + handle_exception(0x600, alignment_handler, (void *)&alignment); > > report_prefix_push("emulator"); > Reviewed-by: Thomas Huth <thuth@redhat.com> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/powerpc/emulator.c b/powerpc/emulator.c index dfe5859..3a8f17e 100644 --- a/powerpc/emulator.c +++ b/powerpc/emulator.c @@ -6,6 +6,7 @@ #include <asm/processor.h> static int volatile is_invalid; +static int volatile alignment; static void program_check_handler(struct pt_regs *regs, void *opaque) { @@ -19,6 +20,18 @@ static void program_check_handler(struct pt_regs *regs, void *opaque) regs->nip += 4; } +static void alignment_handler(struct pt_regs *regs, void *opaque) +{ + int *data = opaque; + + printf("Detected alignment exception 0x%016lx: %08x\n", + regs->nip, *(uint32_t*)regs->nip); + + *data = 1; + + regs->nip += 4; +} + static void test_illegal(void) { report_prefix_push("invalid"); @@ -62,6 +75,8 @@ static void test_64bit(void) * - RT <= RA or RB < RT + (n + 4) is invalid or result is undefined * - RT == RA == 0 is invalid * + * For lswx in little-endian mode, an alignment interrupt always occurs. + * */ #define SPR_XER 1 @@ -81,6 +96,7 @@ static void test_lswx(void) /* check incomplete register filling */ + alignment = 0; asm volatile ("mtspr %[XER], %[len];" "li r12,-1;" "mr r11, r12;" @@ -98,7 +114,12 @@ static void test_lswx(void) */ "xer", "r11", "r12"); +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + report("alignment", alignment); + return; +#else report("partial", regs[0] == 0x01020300 && regs[1] == (uint64_t)-1); +#endif /* check an old know bug: the number of bytes is used as * the number of registers, so try 32 bytes. @@ -195,6 +216,7 @@ static void test_lswx(void) int main(void) { handle_exception(0x700, program_check_handler, (void *)&is_invalid); + handle_exception(0x600, alignment_handler, (void *)&alignment); report_prefix_push("emulator");
For lswx in little-endian mode, an alignment interrupt occurs. Signed-off-by: Laurent Vivier <lvivier@redhat.com> --- powerpc/emulator.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)