isa/rv64si/scall.S

   1 # See LICENSE for license details.
   2
   3 #*****************************************************************************
   4 # scall.S
   5 #-----------------------------------------------------------------------------
   6 #
   7 # Test syscall trap.
   8 #
   9
  10 #include "riscv_test.h"
  11 #include "test_macros.h"
  12
  13 RVTEST_RV64S
  14 RVTEST_CODE_BEGIN
  15
  16 #ifdef __MACHINE_MODE
  17   #define sscratch mscratch
  18   #define sstatus mstatus
  19   #define scause mcause
  20   #define sepc mepc
  21   #define sret mret
  22   #define stvec_handler mtvec_handler
  23   #undef SSTATUS_SPP
  24   #define SSTATUS_SPP MSTATUS_MPP
  25 #endif
  26
  27   li TESTNUM, 2
  28
  29   # This is the expected trap code.
  30   li t1, CAUSE_USER_ECALL
  31
  32 #ifdef __MACHINE_MODE
  33   # If running in M mode, use mstatus.MPP to check existence of U mode.
  34   # Otherwise, if in S mode, then U mode must exist and we don't need to check.
  35   li t0, MSTATUS_MPP
  36   csrc mstatus, t0
  37   csrr t1, mstatus
  38   and t0, t0, t1
  39   beqz t0, 1f
  40
  41   # If U mode doesn't exist, mcause should indicate ECALL from M mode.
  42   li t1, CAUSE_MACHINE_ECALL
  43 #endif
  44
  45 1:
  46   li t0, SSTATUS_SPP
  47   csrc sstatus, t0
  48   la t0, 1f
  49   csrw sepc, t0
  50   sret
  51 1:
  52
  53   li TESTNUM, 1
  54 do_scall:
  55   scall
  56   j fail
  57
  58   TEST_PASSFAIL
  59
  60   .align 2
  61   .global stvec_handler
  62 stvec_handler:
  63   csrr t0, scause
  64   bne t0, t1, fail
  65   la t2, do_scall
  66   csrr t0, sepc
  67   bne t0, t2, fail
  68   j pass
  69
  70 RVTEST_CODE_END
  71
  72   .data
  73 RVTEST_DATA_BEGIN
  74
  75   TEST_DATA
  76
  77 RVTEST_DATA_END