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| author | Iain Sandoe <iain@sandoe.co.uk> | 2019-09-16 15:11:00 +0100 |
|---|---|---|
| committer | Iain Sandoe <iain@sandoe.co.uk> | 2020-11-11 20:44:02 +0000 |
| commit | 5d46ec3db21d8c8926f15a634b2d6570536db5f1 (patch) | |
| tree | 319e91edab9ba1c12a694b210053af3f339bdb9a /gcc/dwarf2out.c | |
| parent | 9227f81db7a0b38dd14ce4b48ca50c33cf8d5e1c (diff) | |
| download | gcc-5d46ec3db21d8c8926f15a634b2d6570536db5f1.zip gcc-5d46ec3db21d8c8926f15a634b2d6570536db5f1.tar.gz gcc-5d46ec3db21d8c8926f15a634b2d6570536db5f1.tar.bz2 | |
CFI-handling : Add a hook to allow target-specific Personality and LSDA indirections.
At present, the output of .cfi_personality and .cfi_lsda assumes
ELF semantics for indirections. This isn't suitable for all targets
and is one blocker to moving Darwin to use .cfi_xxxx.
The patch adds a target hook that allows non-ELF targets to use
indirections appropriate to their needs.
gcc/ChangeLog:
* config/darwin-protos.h (darwin_make_eh_symbol_indirect): New.
* config/darwin.c (darwin_make_eh_symbol_indirect): New. Use
Mach-O semantics for personality and ldsa indirections.
* config/darwin.h (TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT): New.
* doc/tm.texi: Regenerate.
* doc/tm.texi.in: Add TARGET_ASM_MAKE_EH_SYMBOL_INDIRECT hook.
* dwarf2out.c (dwarf2out_do_cfi_startproc): If the target defines
a hook for indirecting personality and ldsa references, use that
otherwise default to ELF semantics.
* target.def (make_eh_symbol_indirect): New target hook.
Diffstat (limited to 'gcc/dwarf2out.c')
| -rw-r--r-- | gcc/dwarf2out.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c index bc32a17..bea02f9 100644 --- a/gcc/dwarf2out.c +++ b/gcc/dwarf2out.c @@ -991,7 +991,12 @@ dwarf2out_do_cfi_startproc (bool second) in the assembler. Further, the assembler can't handle any of the weirder relocation types. */ if (enc & DW_EH_PE_indirect) - ref = dw2_force_const_mem (ref, true); + { + if (targetm.asm_out.make_eh_symbol_indirect != NULL) + ref = targetm.asm_out.make_eh_symbol_indirect (ref, true); + else + ref = dw2_force_const_mem (ref, true); + } fprintf (asm_out_file, "\t.cfi_personality %#x,", enc); output_addr_const (asm_out_file, ref); @@ -1009,7 +1014,12 @@ dwarf2out_do_cfi_startproc (bool second) SYMBOL_REF_FLAGS (ref) = SYMBOL_FLAG_LOCAL; if (enc & DW_EH_PE_indirect) - ref = dw2_force_const_mem (ref, true); + { + if (targetm.asm_out.make_eh_symbol_indirect != NULL) + ref = targetm.asm_out.make_eh_symbol_indirect (ref, true); + else + ref = dw2_force_const_mem (ref, true); + } fprintf (asm_out_file, "\t.cfi_lsda %#x,", enc); output_addr_const (asm_out_file, ref); |