ArmPkg/Library/SemihostLib/Arm/GccSemihost.S

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  14
  15 .text
  16 .align 2
  17
  18 .globl ASM_PFX(GccSemihostCall)
  19 INTERWORK_FUNC(GccSemihostCall)
  20
  21 /*
  22   Semihosting operation request mechanism
  23
  24   SVC  0x123456  in ARM state (for all architectures)
  25   SVC  0xAB in Thumb state (excluding ARMv7-M)
  26   BKPT 0xAB for ARMv7-M (Thumb-2 only)
  27
  28   R0 - operation type
  29   R1 - block containing all other parametes
  30  */
  31 ASM_PFX(GccSemihostCall):
  32   svc     #0x123456
  33   bx      lr
  34
  35