Separate build of spike and spike-dasm

4 files changed, 93 insertions, 0 deletions

diff --git a/spike_dasm/spike-dasm.cc b/spike_dasm/spike-dasm.cc
new file mode 100644
index 0000000..fa6a25a
--- /dev/null
+++ b/spike_dasm/spike-dasm.cc
@@ -0,0 +1,83 @@
+// See LICENSE for license details.
+
+// This little program finds occurrences of strings like
+//  DASM(ffabc013)
+// in its input, then replaces them with the disassembly
+// enclosed hexadecimal number, interpreted as a RISC-V
+// instruction.
+
+#include "disasm.h"
+#include "extension.h"
+#include <iostream>
+#include <string>
+#include <cstdint>
+#include <fesvr/option_parser.h>
+using namespace std;
+
+int main(int argc, char** argv)
+{
+  string s;
+  const char* isa = DEFAULT_ISA;
+
+  std::function<extension_t*()> extension;
+  option_parser_t parser;
+#ifdef HAVE_DLOPEN
+  parser.option(0, "extension", 1, [&](const char* s){extension = find_extension(s);});
+#endif
+  parser.option(0, "isa", 1, [&](const char* s){isa = s;});
+  parser.parse(argv);
+
+  std::string lowercase;
+  for (const char *p = isa; *p; p++)
+    lowercase += std::tolower(*p);
+
+  int xlen;
+  if (lowercase.compare(0, 4, "rv32") == 0) {
+    xlen = 32;
+  } else if (lowercase.compare(0, 4, "rv64") == 0) {
+    xlen = 64;
+  } else {
+    fprintf(stderr, "bad ISA string: %s\n", isa);
+    return 1;
+  }
+
+  disassembler_t* disassembler = new disassembler_t(xlen);
+  if (extension) {
+    for (auto disasm_insn : extension()->get_disasms()) {
+      disassembler->add_insn(disasm_insn);
+    }
+  }
+
+  while (getline(cin, s))
+  {
+    for (size_t pos = 0; (pos = s.find("DASM(", pos)) != string::npos; )
+    {
+      size_t start = pos;
+
+      pos += strlen("DASM(");
+
+      if (s[pos] == '0' && (s[pos+1] == 'x' || s[pos+1] == 'X'))
+        pos += 2;
+
+      if (!isxdigit(s[pos]))
+        continue;
+
+      char* endp;
+      int64_t bits = strtoull(&s[pos], &endp, 16);
+      if (*endp != ')')
+        continue;
+
+      size_t nbits = 4 * (endp - &s[pos]);
+      if (nbits < 64)
+        bits = bits << (64 - nbits) >> (64 - nbits);
+
+      string dis = disassembler->disassemble(bits);
+      s = s.substr(0, start) + dis + s.substr(endp - &s[0] + 1);
+      pos = start + dis.length();
+    }
+
+    cout << s << '\n';
+  }
+
+  return 0;
+}
diff --git a/spike_dasm/spike_dasm.ac b/spike_dasm/spike_dasm.ac
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/spike_dasm/spike_dasm.ac
diff --git a/spike_dasm/spike_dasm.mk.in b/spike_dasm/spike_dasm.mk.in
new file mode 100644
index 0000000..b6118fd
--- /dev/null
+++ b/spike_dasm/spike_dasm.mk.in
@@ -0,0 +1,9 @@
+spike_dasm_subproject_deps = \
+	disasm \
+  $(if $(HAVE_DLOPEN),riscv,) \
+
+spike_dasm_srcs = \
+  spike_dasm_option_parser.cc \
+
+spike_dasm_install_prog_srcs = \
+	spike-dasm.cc \
diff --git a/spike_dasm/spike_dasm_option_parser.cc b/spike_dasm/spike_dasm_option_parser.cc
new file mode 120000
index 0000000..4244c15
--- /dev/null
+++ b/spike_dasm/spike_dasm_option_parser.cc
@@ -0,0 +1 @@
+../fesvr/option_parser.cc
\ No newline at end of file