mach

ArivoliR · Aug 18, 2024 · 7cb1839 · 7cb1839
1 parent 9626f95
commit 7cb1839
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diff --git a/machtousermode/link.ld b/machtousermode/link.ld
@@ -0,0 +1,5 @@
+SECTIONS
+{
+    . = 0x80000000;
+}
+
diff --git a/machtousermode/mach.elf b/machtousermode/mach.elf
diff --git a/machtousermode/mach2user.s b/machtousermode/mach2user.s
@@ -0,0 +1,30 @@
+.section .text
+.global main
+
+main :
+    la t0, mtrap_handler
+    csrw mtvec, t0
+    csrr t0, mstatus
+    csrw mstatus, t0
+
+    csrr t2, mcause
+    csrr t3, mepc
+    csrr t4, mstatus
+    csrr t5, mtvec
+
+    la t0, ucode
+    csrw mepc, t0
+    mret
+
+mtrap_handler :
+    csrr t2, mcause
+    csrr t3, mepc
+    csrr t4, mstatus
+    csrr t5, mtvec
+
+    la t1, ucode
+    csrw mepc, t1
+    mret
+
+ucode :
+     ecall