diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 6 | ||||
| -rw-r--r-- | gdb/ppc-sysv-tdep.c | 56 |
2 files changed, 41 insertions, 21 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 7ddc112..ad3a59f 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2008-02-01 Thiago Jung Bauermann <bauerman@br.ibm.com> + + * ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Write 32-bit + float in both first and second word in the doubleword, to support + old and new ABIs. + 2008-02-01 Vladimir Prus <vladimir@codesourcery.com> Properly rethrow exception. This fixes errors diff --git a/gdb/ppc-sysv-tdep.c b/gdb/ppc-sysv-tdep.c index c9646eb..7a87743 100644 --- a/gdb/ppc-sysv-tdep.c +++ b/gdb/ppc-sysv-tdep.c @@ -971,6 +971,7 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function, struct value *arg = args[argno]; struct type *type = check_typedef (value_type (arg)); const bfd_byte *val = value_contents (arg); + if (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) <= 8) { /* Floats and Doubles go in f1 .. f13. They also @@ -978,40 +979,53 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function, memory. */ if (write_pass) { + gdb_byte regval[MAX_REGISTER_SIZE]; + const gdb_byte *p; + + /* Version 1.7 of the 64-bit PowerPC ELF ABI says: + + "Single precision floating point values are mapped to + the first word in a single doubleword." + + And version 1.9 says: + + "Single precision floating point values are mapped to + the second word in a single doubleword." + + GDB then writes single precision floating point values + at both words in a doubleword, to support both ABIs. */ + if (TYPE_LENGTH (type) == 4) + { + memcpy (regval, val, 4); + memcpy (regval + 4, val, 4); + p = regval; + } + else + p = val; + + /* Write value in the stack's parameter save area. */ + write_memory (gparam, p, 8); + if (freg <= 13) { - gdb_byte regval[MAX_REGISTER_SIZE]; struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum); + convert_typed_floating (val, type, regval, regtype); regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg, regval); } if (greg <= 10) - { - /* The ABI states "Single precision floating - point values are mapped to the first word in - a single doubleword" and "... floating point - values mapped to the first eight doublewords - of the parameter save area are also passed in - general registers"). - - This code interprets that to mean: store it, - left aligned, in the general register. */ - gdb_byte regval[MAX_REGISTER_SIZE]; - memset (regval, 0, sizeof regval); - memcpy (regval, val, TYPE_LENGTH (type)); - regcache_cooked_write (regcache, - tdep->ppc_gp0_regnum + greg, - regval); - } - write_memory (gparam, val, TYPE_LENGTH (type)); + regcache_cooked_write (regcache, + tdep->ppc_gp0_regnum + greg, + regval); } - /* Always consume parameter stack space. */ + freg++; greg++; - gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize); + /* Always consume parameter stack space. */ + gparam = align_up (gparam + 8, tdep->wordsize); } else if (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 16 |