gdb/testsuite/gdb.asm/sh.inc

   1 # You'll find a bunch of nop opcodes in the below macros.  They are
   2 # there to keep the code correctly aligned.  Be careful to maintain
   3 # them when changing the code.
   4
   5         comment "subroutine declare"
   6         .purgem gdbasm_declare
   7         .macro gdbasm_declare name
   8         .align  1
   9         .global \name
  10 \name:
  11         .endm
  12
  13         comment "subroutine prologue"
  14         .macro gdbasm_enter
  15         mov.l   r14,@-r15
  16         sts.l   pr,@-r15
  17         mov     r15,r14
  18         nop
  19         .endm
  20
  21         comment "subroutine epilogue"
  22         .macro gdbasm_leave
  23         mov     r14,r15
  24         lds.l   @r15+,pr
  25         mov.l   @r15+,r14
  26         rts
  27         nop
  28         nop
  29         .endm
  30
  31         comment "subroutine end"
  32         .purgem gdbasm_end
  33         .macro gdbasm_end name
  34         .size   \name, . - \name
  35         .align  1
  36         .endm
  37
  38         comment "subroutine call"
  39         .macro gdbasm_call subr
  40         mov.l   .Lconst\@,r1
  41         bra     .Lafterconst\@
  42         nop
  43         nop
  44 .Lconst\@:
  45         .align  2
  46         .long   \subr
  47         .align  1
  48 .Lafterconst\@:
  49         jsr     @r1
  50         nop
  51         .endm
  52
  53         .macro gdbasm_several_nops
  54         nop
  55         nop
  56         nop
  57         nop
  58         .endm
  59
  60         comment "exit (0)"
  61         .macro gdbasm_exit0
  62         sleep
  63         nop
  64         .endm
  65
  66         comment "crt0 startup"
  67         .macro gdbasm_startup
  68         comment "If there is a _stack symbol, use it for setting up the stack"
  69         comment "pointer.  In hosted mode (when there is no _stack symbol),"
  70         comment "the operating system will have initialized it already."
  71         mov.l   .stackaddr, r0
  72         tst     r0, r0
  73         bt      .afterstackaddr
  74         mov     r0, r15
  75         bra     .afterstackaddr
  76         nop
  77         .align 2
  78 .stackaddr:
  79         .weak   _stack
  80         .long   _stack
  81         .align  1
  82 .afterstackaddr:
  83         .endm
  84
  85         comment "Declare a data variable"
  86         .purgem gdbasm_datavar
  87         .macro gdbasm_datavar name value
  88         .data
  89         .align 2
  90         .type   \name, @object
  91         .size   \name, 4
  92 \name:
  93         .long   \value
  94         .endm