Change the global pointer symbol to __global_pointer$

[riscv-tests.git] / benchmarks / common / crt.S

diff --git a/benchmarks/common/crt.S b/benchmarks/common/crt.S
index 60486be41dfafcae638f574161861bbeb8c2c487..3e6cee44a3330bcd2b616158df0f2af5434bf566 100644 (file)
--- a/benchmarks/common/crt.S
+++ b/benchmarks/common/crt.S
@@ -2,7 +2,7 @@
 
 #include "encoding.h"
 
-#ifdef __riscv64
+#if __riscv_xlen == 64
 # define LREG ld
 # define SREG sd
 # define REGBYTES 8
@@ -12,24 +12,7 @@
 # define REGBYTES 4
 #endif
 
-  .text
-  .align 6
-user_trap_entry:
-  j trap_entry
-
-  .align 6
-supervisor_trap_entry:
-  j supervisor_trap_entry
-
-  .align 6
-hypervisor_trap_entry:
-  j hypervisor_trap_entry
-
-  .align 6
-machine_trap_entry:
-  j trap_entry
-
-  .align 6
+  .section ".text.init"
   .globl _start
 _start:
   li  x1, 0
@@ -64,31 +47,29 @@ _start:
   li  x30,0
   li  x31,0
 
-  li t0, MSTATUS_PRV1; csrc mstatus, t0    # run tests in user mode
-  li t0, MSTATUS_IE1;  csrs mstatus, t0    # enable interrupts in user mode
-  li t0, MSTATUS_FS;   csrs mstatus, t0    # enable FPU
-  li t0, MSTATUS_XS;   csrs mstatus, t0    # enable accelerator
+  # enable FPU and accelerator if present
+  li t0, MSTATUS_FS | MSTATUS_XS
+  csrs mstatus, t0
 
-#ifdef __riscv64
-  csrr t0, mcpuid
-  # make sure processor supports RV64 if this was compiled for RV64
+  # make sure XLEN agrees with compilation choice
+  li t0, 1
+  slli t0, t0, 31
+#if __riscv_xlen == 64
+  bgez t0, 1f
+#else
   bltz t0, 1f
-  li a0, 1234
-  j tohost_exit
-1:
 #endif
+2:
+  li a0, 1
+  sw a0, tohost, t0
+  j 2b
+1:
 
-  csrr t0, mstatus
-  li t1, MSTATUS_XS
-  and t1, t0, t1
-  sw t1, have_vec, t2
-
-  ## if that didn't stick, we don't have a FPU, so don't initialize it
-  li t1, MSTATUS_FS
-  and t1, t0, t1
-  beqz t1, 1f
+#ifdef __riscv_flen
+  # initialize FPU if we have one
+  la t0, 1f
+  csrw mtvec, t0
 
-#ifdef __riscv_hard_float
   fssr    x0
   fmv.s.x f0, x0
   fmv.s.x f1, x0
@@ -122,12 +103,15 @@ _start:
   fmv.s.x f29,x0
   fmv.s.x f30,x0
   fmv.s.x f31,x0
+1:
 #endif
 
-1:
+  # initialize trap vector
+  la t0, trap_entry
+  csrw mtvec, t0
 
   # initialize global pointer
-  la gp, _gp
+  la gp, __global_pointer$
 
   la  tp, _end + 63
   and tp, tp, -64
@@ -146,10 +130,9 @@ _start:
   sll sp, sp, STKSHIFT
   add sp, sp, tp
 
-  la t0, _init
-  csrw mepc, t0
-  eret
+  j _init
 
+  .align 2
 trap_entry:
   addi sp, sp, -272
 
@@ -191,6 +174,10 @@ trap_entry:
   jal handle_trap
   csrw mepc, a0
 
+  # Remain in M-mode after eret
+  li t0, MSTATUS_MPP
+  csrs mstatus, t0
+
   LREG x1, 1*REGBYTES(sp)
   LREG x2, 2*REGBYTES(sp)
   LREG x3, 3*REGBYTES(sp)
@@ -224,7 +211,7 @@ trap_entry:
   LREG x31, 31*REGBYTES(sp)
 
   addi sp, sp, 272
-  eret
+  mret
 
 .section ".tdata.begin"
 .globl _tdata_begin
@@ -237,3 +224,11 @@ _tdata_end:
 .section ".tbss.end"
 .globl _tbss_end
 _tbss_end:
+
+.section ".tohost","aw",@progbits
+.align 6
+.globl tohost
+tohost: .dword 0
+.align 6
+.globl fromhost
+fromhost: .dword 0