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llvm-project/llvm/test/MC/ARM/dwarf-cfi-initial-state.s

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ARM MC: Fix the initial DWARF CFI unwind info at the start of a function This brings MC into line with GNU 'as' on ARM, and it brings the ARM target into line with most other LLVM targets, which declare the initial CFI state with addInitialFrameState(). Without this, functions generated with .cfi_startproc/endproc on ARM will tend to cause GDB to abort with: gdb/dwarf2-frame.c:1132: internal-error: Unknown CFA rule. I've also tested this by comparing the output of "readelf -w" on the object files produced by llvm-mc and gas when given the .s file added here. This change is part of addressing PR18636. Differential Revision: http://llvm-reviews.chandlerc.com/D2597 llvm-svn: 200255
2014-01-28 06:38:14 +08:00
# RUN: llvm-mc < %s -triple=armv7-linux-gnueabi -filetype=obj -o - \
# RUN: | llvm-dwarfdump - | FileCheck %s
[MC] Emit an error if cfi_startproc is used before a symbol is defined. Currently, we bind those directives with the last symbol, so if none has been defined, this would lead to a crash of the compiler. <rdar://problem/15939159> llvm-svn: 206236
2014-04-15 09:17:45 +08:00
_proc:
ARM MC: Fix the initial DWARF CFI unwind info at the start of a function This brings MC into line with GNU 'as' on ARM, and it brings the ARM target into line with most other LLVM targets, which declare the initial CFI state with addInitialFrameState(). Without this, functions generated with .cfi_startproc/endproc on ARM will tend to cause GDB to abort with: gdb/dwarf2-frame.c:1132: internal-error: Unknown CFA rule. I've also tested this by comparing the output of "readelf -w" on the object files produced by llvm-mc and gas when given the .s file added here. This change is part of addressing PR18636. Differential Revision: http://llvm-reviews.chandlerc.com/D2597 llvm-svn: 200255
2014-01-28 06:38:14 +08:00
.cfi_sections .debug_frame
.cfi_startproc
bx lr
.cfi_endproc
# CHECK: .debug_frame contents:
# CHECK: CIE
# CHECK-NOT: DW_CFA
# When llvm-dwarfdump prints the full info for the DW_CFA_def_cfa
# field, we can check that here too.
# CHECK: DW_CFA_def_cfa:
[DWARF] Add CIE header fields address_size and segment_size when generating dwarf-4 The DWARF-4 specification added 2 new fields in the CIE header called address_size and segment_size. Create these 2 new fields when generating dwarf-4 CIE entries, print out the new fields when dumping the CIE and update tests Differential Revision: http://reviews.llvm.org/D9558 llvm-svn: 237145
2015-05-12 23:25:08 +08:00
# The following 2 DW_CFA_nop instructions are "padding"
# CHECK: DW_CFA_nop:
# CHECK: DW_CFA_nop:
ARM MC: Fix the initial DWARF CFI unwind info at the start of a function This brings MC into line with GNU 'as' on ARM, and it brings the ARM target into line with most other LLVM targets, which declare the initial CFI state with addInitialFrameState(). Without this, functions generated with .cfi_startproc/endproc on ARM will tend to cause GDB to abort with: gdb/dwarf2-frame.c:1132: internal-error: Unknown CFA rule. I've also tested this by comparing the output of "readelf -w" on the object files produced by llvm-mc and gas when given the .s file added here. This change is part of addressing PR18636. Differential Revision: http://llvm-reviews.chandlerc.com/D2597 llvm-svn: 200255
2014-01-28 06:38:14 +08:00
# CHECK-NOT: DW_CFA
# CHECK: FDE