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| author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2017-12-20 13:59:14 +0100 |
|---|---|---|
| committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2017-12-20 13:59:14 +0100 |
| commit | 396d3980f518cfc9a936e3fb8138b0492399525a (patch) | |
| tree | ad8c22608a21fd3eca3f73702feffcadf75e3463 | |
| parent | 175654b9cdd3113a01174b019ac286092398246b (diff) | |
| download | gdb-396d3980f518cfc9a936e3fb8138b0492399525a.zip gdb-396d3980f518cfc9a936e3fb8138b0492399525a.tar.gz gdb-396d3980f518cfc9a936e3fb8138b0492399525a.tar.bz2 | |
[Cell/B.E.] Fix regression due to gdbarch_significant_addr_bit
On Cell/B.E. multi-architecture debugging we use a "merged" address space
that encodes both the main PowerPC address space and the local store address
spaces of all active SPUs. This will always occupy 64 bits.
However, gdbarch_addr_bit is set to 32 on SPU, and may be set to 32 as well
on PowerPC. Since the new gdbarch_significant_addr_bit defaults to the
value of gdbarch_addr_bit, this means addresses may be improperly truncated.
Work around this problem by explicitly setting gdbarch_significant_addr_bit
to 64 both for the SPU target and also for PowerPC target that support
Cell/B.E. execution.
gdb/ChangeLog:
2017-12-20 Ulrich Weigand <uweigand@de.ibm.com>
* spu-tdep.c (spu_gdbarch_init): Set set_gdbarch_significant_addr_bit
to 64 bits.
(ppc_linux_init_abi): Likewise, if Cell/B.E. is supported.
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/ppc-linux-tdep.c | 4 | ||||
| -rw-r--r-- | gdb/spu-tdep.c | 3 |
3 files changed, 13 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index f314e8e..dc6406a 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2017-12-20 Ulrich Weigand <uweigand@de.ibm.com> + + * spu-tdep.c (spu_gdbarch_init): Set set_gdbarch_significant_addr_bit + to 64 bits. + (ppc_linux_init_abi): Likewise, if Cell/B.E. is supported. + 2017-12-18 Joel Brobecker <brobecker@adacore.com> * ada-lang.c (ada_to_fixed_type_1): Rethrow errors with diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c index 0e43a64..5120490 100644 --- a/gdb/ppc-linux-tdep.c +++ b/gdb/ppc-linux-tdep.c @@ -1809,6 +1809,10 @@ ppc_linux_init_abi (struct gdbarch_info info, /* Cell/B.E. cross-architecture unwinder support. */ frame_unwind_prepend_unwinder (gdbarch, &ppu2spu_unwind); + + /* We need to support more than "addr_bit" significant address bits + in order to support SPUADDR_ADDR encoded values. */ + set_gdbarch_significant_addr_bit (gdbarch, 64); } set_gdbarch_displaced_step_location (gdbarch, diff --git a/gdb/spu-tdep.c b/gdb/spu-tdep.c index fb9a5d8..dda3011 100644 --- a/gdb/spu-tdep.c +++ b/gdb/spu-tdep.c @@ -2720,6 +2720,9 @@ spu_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_address_class_name_to_type_flags (gdbarch, spu_address_class_name_to_type_flags); + /* We need to support more than "addr_bit" significant address bits + in order to support SPUADDR_ADDR encoded values. */ + set_gdbarch_significant_addr_bit (gdbarch, 64); /* Inferior function calls. */ set_gdbarch_call_dummy_location (gdbarch, ON_STACK); |