From 3d3424e9a8d6ad56160b98bf6e223c0346164468 Mon Sep 17 00:00:00 2001 From: Matthew Fortune Date: Thu, 29 Sep 2016 11:13:46 +0100 Subject: [PATCH] Refine .cfi_sections check to only consider compact eh_frame The .cfi_sections directive can be safely used multiple times with different sections named at any time unless the compact form of exception handling is requested after CFI information has been emitted. Only the compact form of CFI information changes the way in which CFI is generated and therefore cannot be retrospectively requested after generating CFI information. gas/ PR gas/20648 * dw2gencfi.c (dot_cfi_sections): Refine the check for inconsistent .cfi_sections to only consider compact vs non compact forms. * testsuite/gas/cfi/cfi-common-9.d: New file. * testsuite/gas/cfi/cfi-common-9.s: New file. * testsuite/gas/cfi/cfi.exp: Run new test. --- gas/ChangeLog | 10 ++++++++++ gas/dw2gencfi.c | 5 ++++- gas/testsuite/gas/cfi/cfi-common-9.d | 23 +++++++++++++++++++++++ gas/testsuite/gas/cfi/cfi-common-9.s | 4 ++++ gas/testsuite/gas/cfi/cfi.exp | 1 + 5 files changed, 42 insertions(+), 1 deletion(-) create mode 100644 gas/testsuite/gas/cfi/cfi-common-9.d create mode 100644 gas/testsuite/gas/cfi/cfi-common-9.s diff --git a/gas/ChangeLog b/gas/ChangeLog index d0b8489..12f2e19 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,13 @@ +2016-10-06 Matthew Fortune + + PR gas/20648 + * dw2gencfi.c (dot_cfi_sections): Refine the check for + inconsistent .cfi_sections to only consider compact vs non + compact forms. + * testsuite/gas/cfi/cfi-common-9.d: New file. + * testsuite/gas/cfi/cfi-common-9.s: New file. + * testsuite/gas/cfi/cfi.exp: Run new test. + 2016-10-06 Alan Modra * app.c: Add missing fall through comments. diff --git a/gas/dw2gencfi.c b/gas/dw2gencfi.c index 7294f17..8eebb51 100644 --- a/gas/dw2gencfi.c +++ b/gas/dw2gencfi.c @@ -1269,7 +1269,10 @@ dot_cfi_sections (int ignored ATTRIBUTE_UNUSED) } demand_empty_rest_of_line (); - if (cfi_sections_set && cfi_sections != sections) + if (cfi_sections_set + && (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact)) + && (cfi_sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact)) + != (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact))) as_bad (_("inconsistent uses of .cfi_sections")); cfi_sections = sections; } diff --git a/gas/testsuite/gas/cfi/cfi-common-9.d b/gas/testsuite/gas/cfi/cfi-common-9.d new file mode 100644 index 0000000..33f0176 --- /dev/null +++ b/gas/testsuite/gas/cfi/cfi-common-9.d @@ -0,0 +1,23 @@ +#objdump: -Wf +#name: CFI common 9 +#... +Contents of the .eh_frame section: + +00000000 0+0010 0+0000 CIE + Version: 1 + Augmentation: "zR" + Code alignment factor: .* + Data alignment factor: .* + Return address column: .* + Augmentation data: [01]b + + DW_CFA_nop + DW_CFA_nop + DW_CFA_nop + +00000014 0+00(10|18|1c|20) 0+0018 FDE cie=0+0000 pc=.* + + DW_CFA_nop + DW_CFA_nop + DW_CFA_nop +#... diff --git a/gas/testsuite/gas/cfi/cfi-common-9.s b/gas/testsuite/gas/cfi/cfi-common-9.s new file mode 100644 index 0000000..1bc7cc2 --- /dev/null +++ b/gas/testsuite/gas/cfi/cfi-common-9.s @@ -0,0 +1,4 @@ + .cfi_sections .eh_frame + .cfi_startproc simple + .cfi_sections .debug_frame + .cfi_endproc diff --git a/gas/testsuite/gas/cfi/cfi.exp b/gas/testsuite/gas/cfi/cfi.exp index 3056856..6251434 100644 --- a/gas/testsuite/gas/cfi/cfi.exp +++ b/gas/testsuite/gas/cfi/cfi.exp @@ -136,4 +136,5 @@ if { ![istarget "hppa64*-*"] } then { } run_dump_test "cfi-common-7" run_dump_test "cfi-common-8" + run_dump_test "cfi-common-9" } -- 2.7.4