diff options
| author | Yao Qi <yao.qi@linaro.org> | 2015-07-07 16:58:19 +0100 |
|---|---|---|
| committer | Yao Qi <yao.qi@linaro.org> | 2015-07-07 16:58:19 +0100 |
| commit | 607685ecee1015d6c37e0d800d40453dc0aadc8c (patch) | |
| tree | 97a761af48d3545f57eff64f5fa57be9fb2c0e37 /gdb/arm-linux-nat.c | |
| parent | f1b6788884b2e95105475c95b7f22f6ceba2271e (diff) | |
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
Diffstat (limited to 'gdb/arm-linux-nat.c')
| -rw-r--r-- | gdb/arm-linux-nat.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c index aca046126e..f0ab98cace 100644 --- a/gdb/arm-linux-nat.c +++ b/gdb/arm-linux-nat.c @@ -342,11 +342,6 @@ store_wmmx_regs (const struct regcache *regcache) } } -/* Fetch and store VFP Registers. The kernel object has space for 32 - 64-bit registers, and the FPSCR. This is even when on a VFPv2 or - VFPv3D16 target. */ -#define VFP_REGS_SIZE (32 * 8 + 4) - static void fetch_vfp_regs (struct regcache *regcache) { |