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| author | Kees Cook <keescook@chromium.org> | 2017-01-27 11:14:47 +0000 |
|---|---|---|
| committer | Yao Qi <yao.qi@linaro.org> | 2017-01-27 11:14:47 +0000 |
| commit | 4bd2e1b2aee122b46e335d932f7833f9c86610d0 (patch) | |
| tree | 2c072870aa7c29b77ec26a39a752d222aab3b616 /gdb/arm-linux-nat.c | |
| parent | 22d9a0dee3a69973858000b326cf8eaa14ce7180 (diff) | |
| download | gdb-4bd2e1b2aee122b46e335d932f7833f9c86610d0.zip gdb-4bd2e1b2aee122b46e335d932f7833f9c86610d0.tar.gz gdb-4bd2e1b2aee122b46e335d932f7833f9c86610d0.tar.bz2 | |
Fix PTRACE_GETREGSET failure for compat inferiors on arm64
When running a 32-bit ARM inferior with a 32-bit ARM GDB on a 64-bit
AArch64 host, only VFP registers (NT_ARM_VFP) are available. The FPA
registers (NT_PRFPREG) are not available so GDB must not request them, as
this will fail with -EINVAL. This is most noticeably exposed when running
"generate-core-file":
(gdb) generate-core-file myprog.core
Unable to fetch the floating point registers.: Invalid argument.
ptrace(PTRACE_GETREGSET, 27642, NT_FPREGSET, 0xffcc67f0) = -1 EINVAL (Invalid argument)
gdb/ChangeLog:
2017-01-27 Kees Cook <keescook@google.com>
* gdb/arm-linux-nat.c (arm_linux_fetch_inferior_registers): Call
fetch_fpregs if target has fpa registers.
(arm_linux_store_inferior_registers): Call store_fpregs if target
has fpa registers.
Diffstat (limited to 'gdb/arm-linux-nat.c')
| -rw-r--r-- | gdb/arm-linux-nat.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c index 3c48812..c8474a9 100644 --- a/gdb/arm-linux-nat.c +++ b/gdb/arm-linux-nat.c @@ -384,13 +384,14 @@ arm_linux_fetch_inferior_registers (struct target_ops *ops, if (-1 == regno) { fetch_regs (regcache); - fetch_fpregs (regcache); if (tdep->have_wmmx_registers) fetch_wmmx_regs (regcache); if (tdep->vfp_register_count > 0) fetch_vfp_regs (regcache); + if (tdep->have_fpa_registers) + fetch_fpregs (regcache); } - else + else { if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM) fetch_regs (regcache); @@ -420,11 +421,12 @@ arm_linux_store_inferior_registers (struct target_ops *ops, if (-1 == regno) { store_regs (regcache); - store_fpregs (regcache); if (tdep->have_wmmx_registers) store_wmmx_regs (regcache); if (tdep->vfp_register_count > 0) store_vfp_regs (regcache); + if (tdep->have_fpa_registers) + store_fpregs (regcache); } else { |