diff options
| author | Christophe Lyon <christophe.lyon@st.com> | 2019-09-10 09:47:49 +0200 |
|---|---|---|
| committer | Christophe Lyon <clyon@gcc.gnu.org> | 2019-09-10 09:47:49 +0200 |
| commit | 5d727a4b20257275df59182b00f3bf240772cd0d (patch) | |
| tree | 5fa39e7a145e9c36ae2c34ec78e3360e97f99b56 /gcc/ginclude | |
| parent | 11189793b6ef60645d5d1126d0bd9d0dd83e6583 (diff) | |
[ARM/FDPIC v6 06/24] [ARM] FDPIC: Add support for c++ exceptions
The main difference with existing support is that function addresses
are function descriptor addresses instead. This means that all code
dealing with function pointers now has to cope with function
descriptors instead.
For the same reason, Linux kernel helpers can no longer be called by
dereferencing their address, so we implement wrappers that directly
call the kernel helpers.
When restoring a function address, we also have to restore the FDPIC
register value (r9).
2019-09-10 Christophe Lyon <christophe.lyon@st.com>
Mickaël Guêné <mickael.guene@st.com>
gcc/
* ginclude/unwind-arm-common.h (unwinder_cache): Add reserved5
field.
libgcc/
* config/arm/linux-atomic.c (__kernel_cmpxchg): Add FDPIC support.
(__kernel_dmb): Likewise.
(__fdpic_cmpxchg): New function.
(__fdpic_dmb): New function.
* config/arm/unwind-arm.h (FDPIC_REGNUM): New define.
(gnu_Unwind_Find_got): New function.
(_Unwind_decode_typeinfo_ptr): Add FDPIC support.
* unwind-arm-common.inc (UCB_PR_GOT): New.
(funcdesc_t): New struct.
(get_eit_entry): Add FDPIC support.
(unwind_phase2): Likewise.
(unwind_phase2_forced): Likewise.
(__gnu_Unwind_RaiseException): Likewise.
(__gnu_Unwind_Resume): Likewise.
(__gnu_Unwind_Backtrace): Likewise.
* unwind-pe.h (read_encoded_value_with_base): Likewise.
libstdc++/
* libsupc++/eh_personality.cc (get_ttype_entry): Add FDPIC
support.
Co-Authored-By: Mickaël Guêné <mickael.guene@st.com>
From-SVN: r275568
Diffstat (limited to 'gcc/ginclude')
| -rw-r--r-- | gcc/ginclude/unwind-arm-common.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/ginclude/unwind-arm-common.h b/gcc/ginclude/unwind-arm-common.h index 6df783e0346..d4eb03e7a98 100644 --- a/gcc/ginclude/unwind-arm-common.h +++ b/gcc/ginclude/unwind-arm-common.h @@ -91,7 +91,7 @@ extern "C" { _uw reserved2; /* Personality routine address */ _uw reserved3; /* Saved callsite address */ _uw reserved4; /* Forced unwind stop arg */ - _uw reserved5; + _uw reserved5; /* Personality routine GOT value in FDPIC mode. */ } unwinder_cache; /* Propagation barrier cache (valid after phase 1): */ |