6f072a1034
This patch defines pseudo-registers "v0" through "v31" as aliases that map to the corresponding raw "vr0" through "vr31" vector registers for Power. The motivation behind this is that although GDB defines these registers as "vrX", the disassembler prints them as "vX", e.g. as the operands in instructions such as "vaddubm v2,v1,v1". This can be confusing to users trying to print out the values of the operands while inspecting the disassembled code. The new aliases are made not to belong to any register group, to avoid duplicated values in "info register vector" and "info register all". The arch-specific rs6000_pseudo_register_reggroup_p function had previously been removed since the other pseudo-registers could have their groups inferred by their type. It restored with this patch to handle the aliases. Membership for the other pseudo-registers is still determined using the default function. A new tests checks that GDB prints the expected values of vector registers after they are filled by the inferior, by using both the raw names and the aliases. Two other existing tests are modified to also test the aliases. gdb/ChangeLog: 2019-01-14 Pedro Franco de Carvalho <pedromfc@linux.ibm.com> * ppc-tdep.h (struct gdbarch_tdep) <ppc_v0_alias_regnum>: New field. * rs6000-tdep.c: Include reggroups.h. (IS_V_ALIAS_PSEUDOREG): Define. (rs6000_register_name): Return names for the "vX" aliases. (rs6000_pseudo_register_type): Return type for the "vX" aliases. (rs6000_pseudo_register_reggroup_p): Restore. Handle "vX" aliases. Call default_register_reggroup_p for all other pseudo-registers. (v_alias_pseudo_register_read, v_alias_pseudo_register_write): New functions. (rs6000_pseudo_register_read, rs6000_pseudo_register_write): Handle "vX" aliases. (v_alias_pseudo_register_collect): New function. (rs6000_ax_pseudo_register_collect): Handle "vX" aliases. (rs6000_gdbarch_init): Initialize "vX" aliases as pseudo-registers. Restore registration of rs6000_pseudo_register_reggroup_p with set_tdesc_pseudo_register_reggroup_p. gdb/testsuite/ChangeLog: 2019-01-14 Pedro Franco de Carvalho <pedromfc@linux.ibm.com> * gdb.arch/vsx-regs.exp: Add tests that use the vector register aliases. * gdb.arch/altivec-regs.exp: Likewise. Fix indentation of two tests. * gdb.arch/powerpc-vector-regs.c: New file. * gdb.arch/powerpc-vector-regs.exp: New file. gdb/doc/ChangeLog: 2019-01-14 Pedro Franco de Carvalho <pedromfc@linux.ibm.com> * gdb.texinfo (PowerPC Features): Document the alias pseudo-registers for the org.gnu.gdb.power.altivec feature.
62 lines
1.9 KiB
Text
62 lines
1.9 KiB
Text
# Copyright (C) 2019 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is part of the gdb testsuite.
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# Test vector register access on Power. The inferior executes
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# instructions that fill the vector registers with values ranging from
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# 0 to 31 in each of the 16 bytes of each corresponding register, and
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# we then check if gdb sees these same values.
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if {![istarget "powerpc*"] || [skip_altivec_tests]} {
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verbose "Skipping PowerPC vector register tests."
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return
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}
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standard_testfile
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if { [gdb_compile ${srcdir}/${subdir}/${srcfile} ${binfile} executable {debug}] != "" } {
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untested "vector register tests for PowerPC"
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return
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}
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# Check if our test binary can actually run on this processor.
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clean_restart ${binfile}
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gdb_run_cmd
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gdb_test_multiple "" "wait for exit" {
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-re ".*Illegal instruction.*${gdb_prompt} $" {
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unsupported "vector register tests for PowerPC"
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return
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}
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-re ".*$inferior_exited_re normally.*${gdb_prompt} $" {
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}
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}
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# Run the actual test.
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clean_restart ${binfile}
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gdb_breakpoint [gdb_get_line_number "marker"]
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gdb_run_cmd
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# Wait for the prompt.
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gdb_test "" "Breakpoint.*at.*" "wait for prompt"
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for {set i 0} {$i < 32} {incr i 1} {
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gdb_test "p/z \$vr$i.uint128" ".* = 0x(0?[format %x $i]){16}.*"
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gdb_test "p/z \$v$i.uint128" ".* = 0x(0?[format %x $i]){16}.*"
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}
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