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+#----------------------------------------------------------------------------
+# Macros
+#----------------------------------------------------------------------------
+
+ mask = (1 << alignment) - 1
+
+ # Output VALUE as an unaligned pointer-sized quantity.
+ .macro pbyte value
+ .if alignment == 2
+ .4byte \value
+ .else
+ .8byte \value
+ .endif
+ .endm
+
+
+ # Start a new CIE, and emit everything up to the augmentation data.
+ # Use LABEL to mark the start of the entry and AUG as the augmentation
+ # string.
+ .macro start_cie label,aug
+ .section .eh_frame,"aw",@progbits
+\label:
+ .word 2f-1f # Length
+1:
+ .word 0 # Identifier
+ .byte 1 # Version
+ .string "\aug" # Augmentation
+ .byte 1 # Code alignment
+ .byte 4 # Data alignment
+ .byte 31 # Return address column
+ .endm
+
+
+ # Create a dummy function of SIZE bytes in SECTION and emit the
+ # first four entries of an FDE for it.
+ .macro start_fde cie,section,size
+ .section \section,"ax",@progbits
+3:
+ .rept \size / 4
+ nop
+ .endr
+4:
+ .section .eh_frame,"aw",@progbits
+ .word 2f-1f # Length
+1:
+ .word .-\cie # CIE offset
+ pbyte 3b # Initial PC
+ pbyte 4b-3b # Size of code
+ .endm
+
+
+ # Finish a CIE or FDE entry.
+ .macro end_entry
+ .p2align alignment,fill
+2:
+ .endm
+
+
+ # Start the augmentation data for a CIE that has a 'P' entry
+ # followed by EXTRA bytes. AUGLEN is the length of augmentation
+ # string (including zero terminator), ENCODING is the encoding to
+ # use for the personality routine and VALUE is the value it
+ # should have.
+ .macro persaug auglen,extra,encoding,value
+ .if (\encoding & 0xf0) == 0x50
+ .byte (-(9 + \auglen + 3 + 2) & mask) + 2 + mask + \extra
+ .byte \encoding
+ .fill -(9 + \auglen + 3 + 2) & mask,1,0
+ .else
+ .byte 2 + mask + \extra
+ .byte \encoding
+ .endif
+ pbyte \value
+ .endm
+
+
+ .macro cie_basic label
+ start_cie \label,""
+ end_entry
+ .endm
+
+ .macro fde_basic cie,section,size
+ start_fde \cie,\section,\size
+ end_entry
+ .endm
+
+
+ .macro cie_zP label,encoding,value
+ start_cie \label,"zP"
+ persaug 3,0,\encoding,\value
+ end_entry
+ .endm
+
+ .macro fde_zP cie,section,size
+ start_fde \cie,\section,\size
+ .byte 0 # Augmentation length
+ end_entry
+ .endm
+
+
+ .macro cie_zPR label,encoding,value
+ start_cie \label,"zPR"
+ persaug 4,1,\encoding,\value
+ .byte 0 # FDE enconding
+ end_entry
+ .endm
+
+ .macro fde_zPR cie,section,size
+ start_fde \cie,\section,\size
+ .byte 0 # Augmentation length
+ end_entry
+ .endm
+
+#----------------------------------------------------------------------------
+# Test code
+#----------------------------------------------------------------------------
+
+ cie_basic basic1
+ fde_basic basic1,.text,0x10
+ fde_basic basic1,.text,0x20
+
+ cie_basic basic2
+ fde_basic basic2,.text,0x30
+
+ cie_basic basic3
+ fde_basic basic3,.text,0x40
+
+ cie_basic basic4
+ fde_basic basic4,.text,0x50
+
+ cie_zP zP_unalign1,0x00,foo
+ fde_zP zP_unalign1,.text,0x10
+ fde_zP zP_unalign1,.text,0x20
+
+ cie_zP zP_align1,0x50,foo
+ fde_zP zP_align1,.text,0x10
+ fde_zP zP_align1,.text,0x20
+
+ cie_zPR zPR1,0x00,foo
+ fde_zPR zPR1,.text,0x10
+ fde_zPR zPR1,.discard,0x20
+
+ cie_zPR zPR2,0x00,foo
+ fde_zPR zPR2,.text,0x30
+ fde_zPR zPR2,.text,0x40
+
+ cie_basic basic5
+ fde_basic basic5,.text,0x10
+
+ .if alignment == 2
+ .section .gcc_compiled_long32
+ .endif