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* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Add support
	for the "generic" vector ABI used with GCC 4.3 and later.
	(ppc64_sysv_abi_return_value): Likewise.

gdb/testsuite:
	* gdb.arch/altivec-abi.exp: Skip "generic" tests on 64-bit when
	using a GCC 4.1 or 4.2 compiler.  Add an additional test variant
	"generic ABI, auto".
	(altivec_abi_tests): Accept vectors returned by reference.
This commit is contained in:
Ulrich Weigand 2011-03-15 14:42:34 +00:00
parent 81b4675a00
commit 24e9cda068
4 changed files with 82 additions and 16 deletions
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8
gdb/ChangeLog
View File

@ -1,4 +1,10 @@
2011-03-15 Ulrich Weigand <ulrich.weigand@linaro.org>
2011-03-15 Ulrich Weigand <uweigand@de.ibm.com>
* ppc-sysv-tdep.c (ppc64_sysv_abi_push_dummy_call): Add support
for the "generic" vector ABI used with GCC 4.3 and later.
(ppc64_sysv_abi_return_value): Likewise.
2011-03-15 Ulrich Weigand <uweigand@de.ibm.com>
* infcall.c (call_function_by_hand): Function return value is
always a non_lval, even when using struct_return.

56
gdb/ppc-sysv-tdep.c
View File

@ -1119,6 +1119,9 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
ULONGEST back_chain;
/* See for-loop comment below. */
int write_pass;
/* Size of the by-reference parameter copy region, the final value is
computed in the for-loop below. */
LONGEST refparam_size = 0;
/* Size of the general parameter region, the final value is computed
in the for-loop below. */
LONGEST gparam_size = 0;
@ -1171,19 +1174,26 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
/* The address, at which the next general purpose parameter
(integer, struct, float, vector, ...) should be saved. */
CORE_ADDR gparam;
/* The address, at which the next by-reference parameter
(non-Altivec vector, variably-sized type) should be saved. */
CORE_ADDR refparam;
if (!write_pass)
{
/* 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. */
/* During the first pass, GPARAM and REFPARAM are more like
offsets (start address zero) than addresses. That way
they accumulate the total stack space each region
requires. */
gparam = 0;
refparam = 0;
}
else
{
/* Decrement the stack pointer making space for the on-stack
stack parameters. Set gparam to that region. */
gparam = align_down (sp - gparam_size, 16);
/* Decrement the stack pointer making space for the Altivec
and general on-stack parameters. Set refparam and gparam
to their corresponding regions. */
refparam = align_down (sp - refparam_size, 16);
gparam = align_down (refparam - 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);
@ -1462,7 +1472,7 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
}
else if (TYPE_LENGTH (type) == 16 && TYPE_VECTOR (type)
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
&& tdep->ppc_vr0_regnum >= 0)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
/* In the Altivec ABI, vectors go in the vector registers
v2 .. v13, as well as the parameter area -- always at
@ -1484,6 +1494,30 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
vreg++;
gparam += 16;
}
else if (TYPE_LENGTH (type) >= 16 && TYPE_VECTOR (type)
&& TYPE_CODE (type) == TYPE_CODE_ARRAY)
{
/* Non-Altivec vectors are passed by reference. */
/* Copy value onto the stack ... */
refparam = align_up (refparam, 16);
if (write_pass)
write_memory (refparam, val, TYPE_LENGTH (type));
/* ... and pass a pointer to the copy as parameter. */
if (write_pass)
{
if (greg <= 10)
regcache_cooked_write_unsigned (regcache,
tdep->ppc_gp0_regnum +
greg, refparam);
write_memory_unsigned_integer (gparam, tdep->wordsize,
byte_order, refparam);
}
greg++;
gparam = align_up (gparam + tdep->wordsize, tdep->wordsize);
refparam = align_up (refparam + TYPE_LENGTH (type), tdep->wordsize);
}
else if ((TYPE_CODE (type) == TYPE_CODE_INT
|| TYPE_CODE (type) == TYPE_CODE_ENUM
|| TYPE_CODE (type) == TYPE_CODE_BOOL
@ -1625,8 +1659,9 @@ ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch,
if (!write_pass)
{
/* Save the true region sizes ready for the second pass.
Make certain that the general parameter save area is at
/* Save the true region sizes ready for the second pass. */
refparam_size = refparam;
/* 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;
@ -1849,7 +1884,8 @@ ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *func_type,
}
/* A VMX vector is returned in v2. */
if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (valtype) && tdep->ppc_vr0_regnum >= 0)
&& TYPE_VECTOR (valtype)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
if (readbuf)
regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);

7
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2011-03-15 Ulrich Weigand <uweigand@de.ibm.com>
* gdb.arch/altivec-abi.exp: Skip "generic" tests on 64-bit when
using a GCC 4.1 or 4.2 compiler. Add an additional test variant
"generic ABI, auto".
(altivec_abi_tests): Accept vectors returned by reference.
2010-03-14 Phil Muldoon <pmuldoon@redhat.com>
* gdb.python/py-breakpoint.exp: Add Python stop operations tests.

27
gdb/testsuite/gdb.arch/altivec-abi.exp
View File

@ -118,8 +118,17 @@ proc altivec_abi_tests { extra_flags force_abi } {
append pattern2 " at.*altivec-abi.c.*main.*result = vec_func .vshort,.*goes in v2.*Value returned is.*= .14, 36, 58, 80."
# Let's see if the result is returned correctly.
gdb_test "finish" "Run till exit from .0.*$pattern2" \
"vector value returned correctly"
set message "vector value returned correctly"
gdb_test_multiple "finish" $message {
-re "Run till exit from .0.*$pattern2.*$gdb_prompt $" {
pass $message
}
-re "Run till exit from .0.*Cannot determine contents.*$gdb_prompt $" {
# This happens in those cases where the vector is returned by
# reference (generic vectors on 64-bit GNU/Linux).
pass $message
}
}
# can we print the args correctly for this function?
gdb_test "break struct_of_vector_func" "" ""
@ -150,9 +159,17 @@ if [test_compiler_info gcc*] {
# On GNU/Linux, we can mix -mabi=no-altivec and -mabi=altivec.
# So test some combinations.
if { [istarget "powerpc*-linux*"] } {
set binfile ${objdir}/${subdir}/${testfile}-ge-ge
set pf_prefix "${saved_prefix} generic ABI, forced:"
altivec_abi_tests "additional_flags=-maltivec additional_flags=-mabi=no-altivec" "generic"
# On 64-bit GNU/Linux with GCC 4.1 and 4.2, -mabi=no-altivec
# was broken, so skip those tests there.
if { ![is_lp64_target] || ![test_compiler_info "gcc-4-\[12\]-*"] } {
set binfile ${objdir}/${subdir}/${testfile}-ge-ge
set pf_prefix "${saved_prefix} generic ABI, forced:"
altivec_abi_tests "additional_flags=-maltivec additional_flags=-mabi=no-altivec" "generic"
set binfile ${objdir}/${subdir}/${testfile}-ge-auto
set pf_prefix "${saved_prefix} generic ABI, auto:"
altivec_abi_tests "additional_flags=-maltivec additional_flags=-mabi=no-altivec" "auto"
}
set binfile ${objdir}/${subdir}/${testfile}-av-av
set pf_prefix "${saved_prefix} AltiVec ABI, forced:"