Merge #98

98: Convert default_setup_interrupts into a Rust function r=dkhayes117 a=Disasm

First step towards a fully inline-asm `riscv-rt`.

Co-authored-by: Vadim Kaushan <admin@disasm.info>

Author: bors[bot]

Cargo.toml

@@ -8,6 +8,7 @@ categories = ["embedded", "no-std"]
 description = "Minimal runtime / startup for RISC-V CPU's"
 keywords = ["riscv", "runtime", "startup"]
 license = "ISC"
+edition = "2018"
 
 [dependencies]
 r0 = "1.0.0"

asm.S

@@ -167,16 +167,8 @@ default_start_trap:
     addi sp, sp, 16*REGBYTES
     mret
 
-.section .text
-.global default_setup_interrupts
-
-default_setup_interrupts:
-    // Set trap handler
-    la t0, _start_trap
-    csrw mtvec, t0
-    ret
-
 /* Make sure there is an abort when linking */
+.section .text.abort
 .globl abort
 abort:
     j abort