diff options
| author | Claudiu Zissulescu <claziss@synopsys.com> | 2022-01-05 15:22:10 +0200 |
|---|---|---|
| committer | Claudiu Zissulescu <claziss@synopsys.com> | 2022-01-14 12:24:52 +0200 |
| commit | 68a650ba57a446fef31722cc2d5ac0752dc1b531 (patch) | |
| tree | 3ead14d9a44f620e662dd74d1d01f8d9d24a5053 /libgcc | |
| parent | b3989a7b1069ef9ed56911d96e1ad153e506aabb (diff) | |
| download | gcc-68a650ba57a446fef31722cc2d5ac0752dc1b531.zip gcc-68a650ba57a446fef31722cc2d5ac0752dc1b531.tar.gz gcc-68a650ba57a446fef31722cc2d5ac0752dc1b531.tar.bz2 | |
arc: Add DWARF2 alternate CFA column.
Add DWARF 2 CFA column which tracks the return address from a signal
handler context. This value must not correspond to a hard register
and must be out of the range of DWARF_FRAME_REGNUM().
gcc/
* config/arc/arc.h (DWARF_FRAME_REGNUM): Update definition.
(DWARF_FRAME_RETURN_COLUMN): Use RETURN_ADDR_REGNUM macro.
(INCOMING_RETURN_ADDR_RTX): Likewise.
(DWARF_ALT_FRAME_RETURN_COLUMN): Define.
gcc/testsuite/
* gcc.target/arc/cancel-1.c: New file.
libgcc/
* config/arc/linux-unwind.h (arc_fallback_frame_state): Use
DWARF_ALT_FRAME_RETURN_COLUMN macro.
Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/config/arc/linux-unwind.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libgcc/config/arc/linux-unwind.h b/libgcc/config/arc/linux-unwind.h index 1d8c0c5..be42a31 100644 --- a/libgcc/config/arc/linux-unwind.h +++ b/libgcc/config/arc/linux-unwind.h @@ -120,10 +120,11 @@ arc_fallback_frame_state (struct _Unwind_Context *context, = ((_Unwind_Ptr) &(regs[i])) - new_cfa; } - fs->regs.reg[31].how = REG_SAVED_VAL_OFFSET; - fs->regs.reg[31].loc.offset = ((_Unwind_Ptr) (regs[ret])) - new_cfa; - - fs->retaddr_column = 31; + fs->signal_frame = 1; + fs->retaddr_column = __LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__; + fs->regs.reg[fs->retaddr_column].how = REG_SAVED_VAL_OFFSET; + fs->regs.reg[fs->retaddr_column].loc.offset = + ((_Unwind_Ptr) (regs[ret])) - new_cfa; return _URC_NO_REASON; } |