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This patch is to add the following line to various arm target description
xml files,
<architecture>arm</architecture>
in order to fix problems I've seen on aarch64 multi-arch debugging,
detach^M
Detaching from program: build-gdb/gdb/testsuite/gdb.base/attach, process 17145^M
(gdb) PASS: gdb.base/attach.exp: attach1 detach file^M
No executable file now.^M
Architecture of file not recognized.^M
(gdb) FAIL: gdb.base/attach.exp: attach1, purging symbols after detach
Without this patch, struct target_desc *tdesc_* are not initialised
properly, that is, fields arch and osabi in 'struct target_desc' are
not set properly. This doesn't cause any problems on single arch
debugging, because arch-utils.c:gdbarch_info_fill will guess correctly.
However, in multi-arch debugging, gdbarch_info_fill gets the aarch64
arch, but the target description is for arm (because the current
inferior is 32-bit arm).
It is a surprise to me we didn't set architecture to "arm" before in *.xml
files, and I didn't find out why didn't do so. AFAICS,
gdb/features/arm-with-iwmmxt.xml was added firstly (in patch
https://sourceware.org/ml/gdb-patches/2007-01/msg00593.html)
which had <architecture>iwmmxt</architecture>, however, afterwards,
architecture isn't set anymore in features/arm-*.xml files (in patches
https://sourceware.org/ml/gdb-patches/2009-07/msg00689.html and
https://sourceware.org/ml/gdb-patches/2010-08/msg00225.html).
gdb:
2015-07-07 Yao Qi <yao.qi@linaro.org>
* features/arm-with-m-fpa-layout.xml: Set architecture to arm.
* features/arm-with-m-fpa-layout.c: Regenerated.
* features/arm-with-m-vfp-d16.xml: Likewise.
* features/arm-with-m-vfp-d16.c: Regenerated.
* features/arm-with-m.xml: Likewise.
* features/arm-with-m.c: Regenerated.
* features/arm-with-neon.xml: Likewise.
* features/arm-with-neon.c: Regenerated.
* features/arm-with-vfpv2.xml: Likewise.
* features/arm-with-vfpv2.c: Regenerated.
* features/arm-with-vfpv3.xml: Likewise.
* features/arm-with-vfpv3.c: Regenerated.
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* copying.awk: Print buffer-read-only and vi ro markers.
* copying.c: Rebuild.
* gdbarch.sh (copyright): Print buffer-read-only and vi ro markers.
* gdbarch.c, gdbarch.h: Rebuild.
* target-descriptions.c (maint_print_c_tdesc_cmd): Print
buffer-read-only and vi ro markers.
* features/arm-with-iwmmxt.c: Rebuild.
* features/arm-with-m-fpa-layout.c: Rebuild.
* features/arm-with-m-vfp-d16.c: Rebuild.
* features/arm-with-m.c: Rebuild.
* features/arm-with-neon.c: Rebuild.
* features/arm-with-vfpv2.c: Rebuild.
* features/arm-with-vfpv3.c: Rebuild.
* features/i386/amd64-avx-linux.c: Rebuild.
* features/i386/amd64-avx.c: Rebuild.
* features/i386/amd64-linux.c: Rebuild.
* features/i386/amd64.c: Rebuild.
* features/i386/i386-avx-linux.c: Rebuild.
* features/i386/i386-avx.c: Rebuild.
* features/i386/i386-linux.c: Rebuild.
* features/i386/i386-mmx-linux.c: Rebuild.
* features/i386/i386-mmx.c: Rebuild.
* features/i386/i386.c: Rebuild.
* features/i386/x32-avx-linux.c: Rebuild.
* features/i386/x32-avx.c: Rebuild.
* features/i386/x32-linux.c: Rebuild.
* features/i386/x32.c: Rebuild.
* features/mips-dsp-linux.c: Rebuild.
* features/mips-linux.c: Rebuild.
* features/mips64-dsp-linux.c: Rebuild.
* features/mips64-linux.c: Rebuild.
* features/rs6000/powerpc-32.c: Rebuild.
* features/rs6000/powerpc-32l.c: Rebuild.
* features/rs6000/powerpc-403.c: Rebuild.
* features/rs6000/powerpc-403gc.c: Rebuild.
* features/rs6000/powerpc-405.c: Rebuild.
* features/rs6000/powerpc-505.c: Rebuild.
* features/rs6000/powerpc-601.c: Rebuild.
* features/rs6000/powerpc-602.c: Rebuild.
* features/rs6000/powerpc-603.c: Rebuild.
* features/rs6000/powerpc-604.c: Rebuild.
* features/rs6000/powerpc-64.c: Rebuild.
* features/rs6000/powerpc-64l.c: Rebuild.
* features/rs6000/powerpc-7400.c: Rebuild.
* features/rs6000/powerpc-750.c: Rebuild.
* features/rs6000/powerpc-860.c: Rebuild.
* features/rs6000/powerpc-altivec32.c: Rebuild.
* features/rs6000/powerpc-altivec32l.c: Rebuild.
* features/rs6000/powerpc-altivec64.c: Rebuild.
* features/rs6000/powerpc-altivec64l.c: Rebuild.
* features/rs6000/powerpc-cell32l.c: Rebuild.
* features/rs6000/powerpc-cell64l.c: Rebuild.
* features/rs6000/powerpc-e500.c: Rebuild.
* features/rs6000/powerpc-e500l.c: Rebuild.
* features/rs6000/powerpc-isa205-32l.c: Rebuild.
* features/rs6000/powerpc-isa205-64l.c: Rebuild.
* features/rs6000/powerpc-isa205-altivec32l.c: Rebuild.
* features/rs6000/powerpc-isa205-altivec64l.c: Rebuild.
* features/rs6000/powerpc-isa205-vsx32l.c: Rebuild.
* features/rs6000/powerpc-isa205-vsx64l.c: Rebuild.
* features/rs6000/powerpc-vsx32.c: Rebuild.
* features/rs6000/powerpc-vsx32l.c: Rebuild.
* features/rs6000/powerpc-vsx64.c: Rebuild.
* features/rs6000/powerpc-vsx64l.c: Rebuild.
* features/rs6000/rs6000.c: Rebuild.
* features/s390-linux32.c: Rebuild.
* features/s390-linux32v1.c: Rebuild.
* features/s390-linux32v2.c: Rebuild.
* features/s390-linux64.c: Rebuild.
* features/s390-linux64v1.c: Rebuild.
* features/s390-linux64v2.c: Rebuild.
* features/s390x-linux64.c: Rebuild.
* features/s390x-linux64v1.c: Rebuild.
* features/s390x-linux64v2.c: Rebuild.
* features/tic6x-c62x-linux.c: Rebuild.
* features/tic6x-c62x.c: Rebuild.
* features/tic6x-c64x-linux.c: Rebuild.
* features/tic6x-c64x.c: Rebuild.
* features/tic6x-c64xp-linux.c: Rebuild.
* features/tic6x-c64xp.c: Rebuild.
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* features/arm-with-iwmmxt.c: Regenerate.
* features/arm-with-m-fpa-layout.c: Likewise.
* features/arm-with-m.c: Likewise.
* features/arm-with-neon.c: Likewise.
* features/arm-with-vfpv2.c: Likewise.
* features/arm-with-vfpv3.c: Likewise.
* features/mips-dsp-linux.c: Likewise.
* features/mips-linux.c: Likewise.
* features/mips64-dsp-linux.c: Likewise.
* features/mips64-linux.c: Likewise.
* features/s390-linux32.c: Likewise.
* features/s390-linux32v1.c: Likewise.
* features/s390-linux32v2.c: Likewise.
* features/s390-linux64.c: Likewise.
* features/s390-linux64v1.c: Likewise.
* features/s390-linux64v2.c: Likewise.
* features/s390x-linux64.c: Likewise.
* features/s390x-linux64v1.c: Likewise.
* features/s390x-linux64v2.c: Likewise.
* features/tic6x-c62x-linux.c: Likewise.
* features/tic6x-c62x.c: Likewise.
* features/tic6x-c64x-linux.c: Likewise.
* features/tic6x-c64x.c: Likewise.
* features/tic6x-c64xp-linux.c: Likewise.
* features/tic6x-c64xp.c: Likewise.
* target-descriptions.c: Only generate `field_type' and `type'
variables when needed.
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* features/arm-core.xml: Add attribute type to reg from r0 to r12.
* features/arm-with-iwmmxt.c: Regenerate.
* features/arm-with-neon.c: Regenerate.
* features/arm-with-vfpv2.c: Regenerate.
* features/arm-with-vfpv3.c: Regenerate.
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* target-descriptions.c (tdesc_register_type): Make public.
(tdesc_unnumbered_register): New function.
(tdesc_register_reggroup_p): Allow missing
pseudo_register_reggroup_p.
* target-descriptions.h (tdesc_register_type): Declare.
(tdesc_unnumbered_register): Declare.
* arm-tdep.c (arm_neon_quad_read, arm_neon_quad_write): New functions.
(arm_push_dummy_call): Use arm_neon_quad_write.
(arm_neon_double_type, arm_neon_quad_type): New functions.
(arm_register_type): Handle VFP and NEON registers. Override the
types of double-precision registers for NEON. Disable FPA registers
if they are not present.
(arm_dwarf_reg_to_regnum): Add current VFP and NEON register numbers.
(arm_return_value): Use arm_neon_quad_write and arm_neon_quad_read.
(arm_register_name): Handle VFP single and NEON quad registers.
(arm_pseudo_read, arm_pseudo_write): New functions.
(arm_gdbarch_init): Check for VFP and NEON in the target description.
Assign numbers to double-precision registers. Register VFP and NEON
pseudo registers. Remove a shadowed "i" variable.
* arm-tdep.h (enum gdb_regnum): Add ARM_D0_REGNUM and
ARM_D31_REGNUM.
(struct gdbarch_tdep): Add have_neon_pseudos, have_neon,
have_vfp_registers, have_vfp_pseudos, neon_double_type,
and neon_quad_type.
* features/Makefile: Make expedite settings only architecture
specific.
(WHICH): Add new ARM descriptions.
* features/arm-with-neon.xml, features/arm-with-vfpv2.c,
features/arm-with-vfpv3.c, features/arm-vfpv2.xml,
features/arm-vfpv3.xml, features/arm-with-vfpv2.xml,
features/arm-with-vfpv3.xml, features/arm-with-neon.c: New files.
* regformats/arm-with-neon.dat, regformats/arm-with-vfpv2.dat,
regformats/arm-with-vfpv3.dat: Generate.
doc/
* gdb.texinfo (ARM Features): Document org.gnu.gdb.arm.vfp and
org.gnu.gdb.arm.neon.
gdbserver/
* linux-low.c (linux_write_memory): Update debugging output.
* Makefile.in (clean): Add new descriptions.
(arm-with-vfpv2.o, arm-with-vfpv2.c, arm-with-vfpv3.o)
(arm-with-vfpv3.c, arm-with-neon.o, arm-with-neon.c): New rules.
* configure.srv: Add new files for arm*-*-linux*.
* linux-arm-low.c: Add new declarations.
(PTRACE_GETVFPREGS, PTRACE_SETVFPREGS): Define if undefined.
(arm_hwcap, HWCAP_VFP, HWCAP_IWMMXT, HWCAP_NEON, HWCAP_VFPv3)
(HWCAP_VFPv3D16): New.
(arm_fill_wmmxregset, arm_store_wmmxregset): Check HWCAP_IWMMXT
instead of __IWMMXT__.
(arm_fill_vfpregset, arm_store_vfpregset, arm_get_hwcap)
(arm_arch_setup): New.
(target_regsets): Remove #ifdef. Add VFP regset.
(the_low_target): Use arm_arch_setup.
testsuite/
* gdb.base/float.exp: Handle VFP registers.
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