Yao Qi 607685ecee Native debug arm program by aarch64 GDB ... This patch is to let aarch64 GDB debug 32-bit arm program natively. In each function for fetching and storing registers, GDB will check gdbarch_bfd_arch_info (gdbarch)->bits_per_word, if it is 32, call the corresponding aarch32 functions in aarch32-linux-nat.c, otherwise fall back to aarch64 code to fetch and store registers. aarch64_linux_read_description has to return the right target description, but we don't have gdbarch available there, so GDB fetches auxv and gets AT_PHENT, in order to determine whether the target is 32-bit or 64-bit. I learned this trick from solib-svr4.c. gdb: 2015-07-07 Yao Qi <yao.qi@linaro.org> * aarch32-linux-nat.h (VFP_REGS_SIZE): New macro, moved from arm-linux-nat.c. * aarch64-linux-nat.c: Include aarch32-linux-nat.h and elf/external.h. (fetch_gregs_from_thread): Call aarch32_gp_regcache_supply if target is 32-bit. (store_gregs_to_thread): Call aarch32_gp_regcache_collect if target is 32-bit. (fetch_fpregs_from_thread): Call aarch32_vfp_regcache_supply if target is 32-bit. (store_fpregs_to_thread): Call aarch32_vfp_regcache_collect if target is 32-bit. (tdesc_arm_with_vfpv3, tdesc_arm_with_neon): Declare. (aarch64_linux_read_description): Return the right target description. * arm-linux-nat.c (VFP_REGS_SIZE): Moved to aarch32-linux-nat.h. * config/aarch64/linux.mh (NATDEPFILES): Add aarch32-linux-nat.o. * configure.tgt (aarch64*-*-linux*): Add arm-tdep.o and arm-linux-tdep.o		2015-07-07 16:58:19 +01:00
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aarch64	Native debug arm program by aarch64 GDB	2015-07-07 16:58:19 +01:00
alpha
arm
djgpp
i386
ia64
m32r
m68k
m88k
mips
pa
powerpc
s390
sh
sparc
tilegx
vax
xtensa
nm-linux.h
nm-nto.h