[PATCH] libgloss: riscv: Fix envp parameter for main

[Bernd Edlinger]

The envp paramter is currently NULL when crt0.S calls main.
With this patch the envp parameter should now be set correctly.
Tested with riscv32 and riscv64: both gdb/sim and qemu do work.
---
 libgloss/riscv/crt0.S | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libgloss/riscv/crt0.S b/libgloss/riscv/crt0.S
index f1c5419a5..54443e412 100644
--- a/libgloss/riscv/crt0.S
+++ b/libgloss/riscv/crt0.S
@@ -61,7 +61,9 @@ _start:
 
   lw      a0, 0(sp)                  # a0 = argc
   addi    a1, sp, __SIZEOF_POINTER__ # a1 = argv
-  li      a2, 0                      # a2 = envp = NULL
+  slli    a2, a0, 1 + __SIZEOF_POINTER__ >> 2
+  addi    a2, a2, __SIZEOF_POINTER__
+  add     a2, a2, a1                 # a2 = envp
   call    main
   tail    exit
   .size  _start, .-_start
-- 
2.25.1