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crash-gdb-7.6-ppc64_sysv_abi_push_float.patch
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File crash-gdb-7.6-ppc64_sysv_abi_push_float.patch of Package crash
From: Tiago Daitx <tdaitx@sourceware.org> Date: Mon Apr 1 04:05:35 2013 +0000 Git-commit: d81e75c0756f21d2c3d45ce86d8b45c65f01ef67 References: ppc64le enablement gdb/ChangeLog 2013-03-01 Tiago Stürmer Daitx <tdaitx@linux.vnet.ibm.com> * ppc-sysv-tdep.c (ppc64_sysv_abi_push_float): New function. (ppc64_sysv_abi_push_dummy_call): Handle complex arguments. Acked-by: Petr Tesarik <ptesarik@suse.cz> --- gdb/ChangeLog | 5 + gdb/ppc-sysv-tdep.c | 196 +++++++++++++++++++++++++++++++++------------------- 2 files changed, 131 insertions(+), 70 deletions(-) --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2013-03-31 Tiago Stürmer Daitx <tdaitx@linux.vnet.ibm.com> + + * ppc-sysv-tdep.c (ppc64_sysv_abi_push_float): New function. + (ppc64_sysv_abi_push_dummy_call): Handle complex arguments. + 2013-04-26 Joel Brobecker <brobecker@adacore.com> * NEWS: Change "since GDB 7.5" into "in GDB 7.6". --- a/gdb/ppc-sysv-tdep.c +++ b/gdb/ppc-sysv-tdep.c @@ -1101,6 +1101,83 @@ convert_code_addr_to_desc_addr (CORE_ADD return 1; } +/* Push a float in either registers, or in the stack. Using the ppc 64 bit + SysV ABI. + + This implements a dumbed down version of the ABI. It always writes + values to memory, GPR and FPR, even when not necessary. Doing this + greatly simplifies the logic. */ + +static void +ppc64_sysv_abi_push_float (struct gdbarch *gdbarch, struct regcache *regcache, + struct gdbarch_tdep *tdep, struct type *type, + const bfd_byte *val, int freg, int greg, + CORE_ADDR gparam) +{ + gdb_byte regval[MAX_REGISTER_SIZE]; + const gdb_byte *p; + + if (TYPE_LENGTH (type) <= 8) + { + /* 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); + + /* Floats and Doubles go in f1 .. f13. They also consume a left aligned + GREG, and can end up in memory. */ + if (freg <= 13) + { + struct type *regtype; + + regtype = register_type (gdbarch, tdep->ppc_fp0_regnum + freg); + convert_typed_floating (val, type, regval, regtype); + regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg, regval); + } + if (greg <= 10) + regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg, regval); + } + else + { + /* IBM long double stored in two doublewords of the + parameter save area and corresponding registers. */ + if (!tdep->soft_float && freg <= 13) + { + regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg, val); + if (freg <= 12) + regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + freg + 1, + val + 8); + } + if (greg <= 10) + { + regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg, val); + if (greg <= 9) + regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + greg + 1, + val + 8); + } + write_memory (gparam, val, TYPE_LENGTH (type)); + } +} + /* Pass the arguments in either registers, or in the stack. Using the ppc 64 bit SysV ABI. @@ -1218,53 +1295,9 @@ ppc64_sysv_abi_push_dummy_call (struct g if (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) <= 8) { - /* Floats and Doubles go in f1 .. f13. They also - consume a left aligned GREG,, and can end up in - 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) - { - 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) - regcache_cooked_write (regcache, - tdep->ppc_gp0_regnum + greg, - regval); - } + ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, type, + val, freg, greg, gparam); freg++; greg++; @@ -1276,35 +1309,58 @@ ppc64_sysv_abi_push_dummy_call (struct g && (gdbarch_long_double_format (gdbarch) == floatformats_ibm_long_double)) { - /* IBM long double stored in two doublewords of the - parameter save area and corresponding registers. */ if (write_pass) + ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, type, + val, freg, greg, gparam); + freg += 2; + greg += 2; + gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize); + } + else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX + && (TYPE_LENGTH (type) == 8 || TYPE_LENGTH (type) == 16)) + { + int i; + + for (i = 0; i < 2; i++) { - if (!tdep->soft_float && freg <= 13) - { - regcache_cooked_write (regcache, - tdep->ppc_fp0_regnum + freg, - val); - if (freg <= 12) - regcache_cooked_write (regcache, - tdep->ppc_fp0_regnum + freg + 1, - val + 8); - } - if (greg <= 10) + if (write_pass) { - regcache_cooked_write (regcache, - tdep->ppc_gp0_regnum + greg, - val); - if (greg <= 9) - regcache_cooked_write (regcache, - tdep->ppc_gp0_regnum + greg + 1, - val + 8); + struct type *target_type; + + target_type = check_typedef (TYPE_TARGET_TYPE (type)); + ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, + target_type, val + i * + TYPE_LENGTH (target_type), + freg, greg, gparam); } - write_memory (gparam, val, TYPE_LENGTH (type)); + freg++; + greg++; + /* Always consume parameter stack space. */ + gparam = align_up (gparam + 8, tdep->wordsize); + } + } + else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX + && TYPE_LENGTH (type) == 32 + && (gdbarch_long_double_format (gdbarch) + == floatformats_ibm_long_double)) + { + int i; + + for (i = 0; i < 2; i++) + { + struct type *target_type; + + target_type = check_typedef (TYPE_TARGET_TYPE (type)); + if (write_pass) + ppc64_sysv_abi_push_float (gdbarch, regcache, tdep, + target_type, val + i * + TYPE_LENGTH (target_type), + freg, greg, gparam); + freg += 2; + greg += 2; + gparam = align_up (gparam + TYPE_LENGTH (target_type), + tdep->wordsize); } - freg += 2; - greg += 2; - gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize); } else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT && TYPE_LENGTH (type) <= 8)
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