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authorUlrich Weigand <uweigand@de.ibm.com>2010-06-19 17:36:51 +0000
committerUlrich Weigand <uweigand@de.ibm.com>2010-06-19 17:36:51 +0000
commitd2ed6730f2ef390d50a47ea03ee3a5b1dd5e37f0 (patch)
tree321615fd866fdd7f688d14fbf8b62ba1de12ff36 /gdb/spu-tdep.h
parentfbece226ba5bc19f942384f8a048eba3bd92f99a (diff)
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ChangeLog:
* spu-multiarch.c (spu_xfer_partial): Wrap around local store limit on local store memory accesses. * spu-linux-nat.c (spu_xfer_partial): Likewise. * spu-tdep.c (spu_lslr): Remove. (spu_pointer_to_address): Do not truncate addresses. (spu_integer_to_address): Likewise. (spu_overlay_new_objfile): Use SPU_OVERLAY_LMA. * spu-tdep.h: Add comments. (SPUADDR_SPU): Respect SPU_OVERLAY_LMA bit. (SPU_OVERLAY_LMA): Define. gdbserver/ChangeLog: * spu-low.c (spu_read_memory): Wrap around local store limit. (spu_write_memory): Likewise. testsuite/ChangeLog: * gdb.arch/spu-ls.exp: New file. * gdb.arch/spu-ls.c: Likewise.
Diffstat (limited to 'gdb/spu-tdep.h')
-rw-r--r--gdb/spu-tdep.h61
1 files changed, 59 insertions, 2 deletions
diff --git a/gdb/spu-tdep.h b/gdb/spu-tdep.h
index 9e70db9..4b83f74 100644
--- a/gdb/spu-tdep.h
+++ b/gdb/spu-tdep.h
@@ -50,14 +50,71 @@ enum spu_regnum
/* Local store. */
#define SPU_LS_SIZE 0x40000
-/* Address conversions. */
+/* Address conversions.
+
+ In a combined PPU/SPU debugging session, we have to consider multiple
+ address spaces: the PPU 32- or 64-bit address space, and the 32-bit
+ local store address space for each SPU context. As it is currently
+ not yet possible to use the program_space / address_space mechanism
+ to represent this, we encode all those addresses into one single
+ 64-bit address for the whole process. For SPU programs using overlays,
+ this address space must also include separate ranges reserved for the
+ LMA of overlay sections.
+
+
+ The following combinations are supported for combined debugging:
+
+ PPU address (this relies on the fact that PPC 64-bit user space
+ addresses can never have the highest-most bit set):
+
+ +-+---------------------------------+
+ |0| ADDR [63] |
+ +-+---------------------------------+
+
+ SPU address for SPU context with id SPU (this assumes that SPU
+ IDs, which are file descriptors, are never larger than 2^30):
+
+ +-+-+--------------+----------------+
+ |1|0| SPU [30] | ADDR [32] |
+ +-+-+--------------+----------------+
+
+ SPU overlay section LMA for SPU context with id SPU:
+
+ +-+-+--------------+----------------+
+ |1|1| SPU [30] | ADDR [32] |
+ +-+-+--------------+----------------+
+
+
+ In SPU stand-alone debugging mode (using spu-linux-nat.c),
+ the following combinations are supported:
+
+ SPU address:
+
+ +-+-+--------------+----------------+
+ |0|0| 0 | ADDR [32] |
+ +-+-+--------------+----------------+
+
+ SPU overlay section LMA:
+
+ +-+-+--------------+----------------+
+ |0|1| 0 | ADDR [32] |
+ +-+-+--------------+----------------+
+
+
+ The following macros allow manipulation of addresses in the
+ above formats. */
+
#define SPUADDR(spu, addr) \
((spu) != -1? (ULONGEST)1 << 63 | (ULONGEST)(spu) << 32 | (addr) : (addr))
+
#define SPUADDR_SPU(addr) \
(((addr) & (ULONGEST)1 << 63) \
- ? (int) ((ULONGEST)(addr) >> 32 & 0x7fffffff) \
+ ? (int) ((ULONGEST)(addr) >> 32 & 0x3fffffff) \
: -1)
+
#define SPUADDR_ADDR(addr) \
(((addr) & (ULONGEST)1 << 63)? (ULONGEST)(addr) & 0xffffffff : (addr))
+#define SPU_OVERLAY_LMA ((ULONGEST)1 << 62)
+
#endif