diff options
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/testsuite/sim/msp430/ChangeLog | 6 | ||||
| -rw-r--r-- | sim/testsuite/sim/msp430/testutils.inc | 34 |
2 files changed, 38 insertions, 2 deletions
diff --git a/sim/testsuite/sim/msp430/ChangeLog b/sim/testsuite/sim/msp430/ChangeLog index d26efad..458ee21 100644 --- a/sim/testsuite/sim/msp430/ChangeLog +++ b/sim/testsuite/sim/msp430/ChangeLog @@ -1,3 +1,9 @@ +2016-01-05 Nick Clifton <nickc@redhat.com> + + * testutils.inc (__pass): Use the LMA addresses of the _passmsg + symbol. + (__fail): Likewise. + 2014-03-10 Mike Frysinger <vapier@gentoo.org> * add.s, allinsn.exp, testutils.inc: New files. diff --git a/sim/testsuite/sim/msp430/testutils.inc b/sim/testsuite/sim/msp430/testutils.inc index 6c540b1..1ddef23 100644 --- a/sim/testsuite/sim/msp430/testutils.inc +++ b/sim/testsuite/sim/msp430/testutils.inc @@ -9,13 +9,43 @@ .global __pass .type __pass, function __pass: - write 1, _passmsg, 5 + # Note - we cannot just invoke: + # + # write 1, _passmsg, 5 + # + # here because _passmsg contains the run-time (VMA) address of + # the pass string (probably 0x500) not the load-time (LMA) + # address (probably 0x804c). Normally using the VMA address + # would be the correct thing to do - *if* there was some start + # up code which copied data from LMA to VMA. But we have no + # start up code, so the data still resides at the LMA + # address. Hence we use __romdatastart instead. + # + # Note - we are cheating because the address that we pass to + # "write" should actually be: + # + # __romdatastart + (_passmsg - __datastart) + # + # but the assembler cannot cope with this expression. So we + # cheat and use the fact that we know that _passmsg is the + # first string in the .data section and so (_passmsg - + # __datastart) evaluates to zero. + + write 1, __romdatastart, 5 exit 0 .global __fail .type __fail, function __fail: - write 1, _failmsg, 5 + # Note - see above. + # + # write 1, _failmsg, 5 + # + # This time we use the fact that _passmsg is aligned to a + # 16 byte boundary to work out that (_failmsg - __datastart) + # evaluates to 0x10. + + write 1, __romdatastart + 0x10, 5 exit 1 .data |