ld/testsuite/ld-mips-elf/eh-frame1.s

   1 #----------------------------------------------------------------------------
   2 # Macros
   3 #----------------------------------------------------------------------------
   4
   5         mask = (1 << alignment) - 1
   6
   7         # Output VALUE as an unaligned pointer-sized quantity.
   8         .macro pbyte value
   9         .if alignment == 2
  10         .4byte          \value
  11         .else
  12         .8byte          \value
  13         .endif
  14         .endm
  15
  16
  17         # Start a new CIE, and emit everything up to the augmentation data.
  18         # Use LABEL to mark the start of the entry and AUG as the augmentation
  19         # string.
  20         .macro start_cie label,aug
  21         .section        .eh_frame,"aw",@progbits
  22 \label:
  23         .word           2f-1f           # Length
  24 1:
  25         .word           0               # Identifier
  26         .byte           1               # Version
  27         .string         "\aug"          # Augmentation
  28         .byte           1               # Code alignment
  29         .byte           4               # Data alignment
  30         .byte           31              # Return address column
  31         .endm
  32
  33
  34         # Create a dummy function of SIZE bytes in SECTION and emit the
  35         # first four entries of an FDE for it.
  36         .macro start_fde cie,section,size
  37         .section        \section,"ax",@progbits
  38 3:
  39         .rept           \size / 4
  40         nop
  41         .endr
  42 4:
  43         .section        .eh_frame,"aw",@progbits
  44         .word           2f-1f           # Length
  45 1:
  46         .word           .-\cie          # CIE offset
  47         pbyte           3b              # Initial PC
  48         pbyte           4b-3b           # Size of code
  49         .endm
  50
  51
  52         # Finish a CIE or FDE entry.
  53         .macro end_entry
  54         .p2align        alignment,fill
  55 2:
  56         .endm
  57
  58
  59         # Start the augmentation data for a CIE that has a 'P' entry
  60         # followed by EXTRA bytes.  AUGLEN is the length of augmentation
  61         # string (including zero terminator), ENCODING is the encoding to
  62         # use for the personality routine and VALUE is the value it
  63         # should have.
  64         .macro          persaug auglen,extra,encoding,value
  65         .if (\encoding & 0xf0) == 0x50
  66         .byte           (-(9 + \auglen + 3 + 2) & mask) + 2 + mask + \extra
  67         .byte           \encoding
  68         .fill           -(9 + \auglen + 3 + 2) & mask,1,0
  69         .else
  70         .byte           2 + mask + \extra
  71         .byte           \encoding
  72         .endif
  73         pbyte           \value
  74         .endm
  75
  76
  77         .macro cie_basic label
  78         start_cie       \label,""
  79         end_entry
  80         .endm
  81
  82         .macro fde_basic cie,section,size
  83         start_fde       \cie,\section,\size
  84         end_entry
  85         .endm
  86
  87
  88         .macro cie_zP label,encoding,value
  89         start_cie        \label,"zP"
  90         persaug         3,0,\encoding,\value
  91         end_entry
  92         .endm
  93
  94         .macro fde_zP cie,section,size
  95         start_fde        \cie,\section,\size
  96         .byte            0              # Augmentation length
  97         end_entry
  98         .endm
  99
 100
 101         .macro cie_zPR label,encoding,value
 102         start_cie        \label,"zPR"
 103         persaug         4,1,\encoding,\value
 104         .byte           0               # FDE enconding
 105         end_entry
 106         .endm
 107
 108         .macro fde_zPR cie,section,size
 109         start_fde       \cie,\section,\size
 110         .byte           0               # Augmentation length
 111         end_entry
 112         .endm
 113
 114 #----------------------------------------------------------------------------
 115 # Test code
 116 #----------------------------------------------------------------------------
 117
 118         cie_basic       basic1
 119         fde_basic       basic1,.text,0x10
 120         fde_basic       basic1,.text,0x20
 121
 122         cie_basic       basic2
 123         fde_basic       basic2,.text,0x30
 124
 125         cie_basic       basic3
 126         fde_basic       basic3,.text,0x40
 127
 128         cie_basic       basic4
 129         fde_basic       basic4,.text,0x50
 130
 131         cie_zP          zP_unalign1,0x00,foo
 132         fde_zP          zP_unalign1,.text,0x10
 133         fde_zP          zP_unalign1,.text,0x20
 134
 135         cie_zP          zP_align1,0x50,foo
 136         fde_zP          zP_align1,.text,0x10
 137         fde_zP          zP_align1,.text,0x20
 138
 139         cie_zPR         zPR1,0x00,foo
 140         fde_zPR         zPR1,.text,0x10
 141         fde_zPR         zPR1,.discard,0x20
 142
 143         cie_zPR         zPR2,0x00,foo
 144         fde_zPR         zPR2,.text,0x30
 145         fde_zPR         zPR2,.text,0x40
 146
 147         cie_basic       basic5
 148         fde_basic       basic5,.text,0x10
 149
 150         .if alignment == 2
 151         .section        .gcc_compiled_long32
 152         .endif