diff options
Diffstat (limited to 'gdb/ppc-sysv-tdep.c')
| -rw-r--r-- | gdb/ppc-sysv-tdep.c | 58 |
1 files changed, 24 insertions, 34 deletions
diff --git a/gdb/ppc-sysv-tdep.c b/gdb/ppc-sysv-tdep.c index 1200b61..300dcac 100644 --- a/gdb/ppc-sysv-tdep.c +++ b/gdb/ppc-sysv-tdep.c @@ -902,9 +902,6 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, ULONGEST back_chain; /* See for-loop comment below. */ int write_pass; - /* Size of the Altivec's vector parameter region, the final value is - computed in the for-loop below. */ - LONGEST vparam_size = 0; /* Size of the general parameter region, the final value is computed in the for-loop below. */ LONGEST gparam_size = 0; @@ -948,28 +945,21 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, /* Next available vector register for vector arguments. */ int vreg = 2; /* The address, at which the next general purpose parameter - (integer, struct, float, ...) should be saved. */ + (integer, struct, float, vector, ...) should be saved. */ CORE_ADDR gparam; - /* Address, at which the next Altivec vector parameter should be - saved. */ - CORE_ADDR vparam; if (!write_pass) { - /* During the first pass, GPARAM and VPARAM are more like - offsets (start address zero) than addresses. That way - they accumulate the total stack space each region - requires. */ + /* During the first pass, GPARAM is more like an offset + (start address zero) than an address. That way it + accumulates the total stack space required. */ gparam = 0; - vparam = 0; } else { - /* Decrement the stack pointer making space for the Altivec - and general on-stack parameters. Set vparam and gparam - to their corresponding regions. */ - vparam = align_down (sp - vparam_size, 16); - gparam = align_down (vparam - gparam_size, 16); + /* Decrement the stack pointer making space for the on-stack + stack parameters. Set gparam to that region. */ + gparam = align_down (sp - gparam_size, 16); /* Add in space for the TOC, link editor double word, compiler double word, LR save area, CR save area. */ sp = align_down (gparam - 48, 16); @@ -1147,24 +1137,25 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, && TYPE_CODE (type) == TYPE_CODE_ARRAY && tdep->ppc_vr0_regnum >= 0) { - /* In the Altivec ABI, vectors go in the vector - registers v2 .. v13, or when that runs out, a vector - annex which goes above all the normal parameters. - NOTE: cagney/2003-09-21: This is a guess based on the - PowerOpen Altivec ABI. */ - if (vreg <= 13) + /* In the Altivec ABI, vectors go in the vector registers + v2 .. v13, as well as the parameter area -- always at + 16-byte aligned addresses. */ + + gparam = align_up (gparam, 16); + greg += greg & 1; + + if (write_pass) { - if (write_pass) + if (vreg <= 13) regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + vreg, val); - vreg++; - } - else - { - if (write_pass) - write_memory (vparam, val, TYPE_LENGTH (type)); - vparam = align_up (vparam + TYPE_LENGTH (type), 16); + + write_memory (gparam, val, TYPE_LENGTH (type)); } + + greg += 2; + vreg++; + gparam += 16; } else if ((TYPE_CODE (type) == TYPE_CODE_INT || TYPE_CODE (type) == TYPE_CODE_ENUM @@ -1307,9 +1298,8 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, if (!write_pass) { - /* Save the true region sizes ready for the second pass. */ - vparam_size = vparam; - /* Make certain that the general parameter save area is at + /* Save the true region sizes ready for the second pass. + Make certain that the general parameter save area is at least the minimum 8 registers (or doublewords) in size. */ if (greg < 8) gparam_size = 8 * tdep->wordsize; |