feat(zkvms): Add nexus guest and it's macro

5 files changed, 105 insertions, 0 deletions

diff --git a/zkvms/nexus/guest/Cargo.toml b/zkvms/nexus/guest/Cargo.toml
new file mode 100644
index 0000000..1d91504
--- /dev/null
+++ b/zkvms/nexus/guest/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "guest"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+
+[dependencies]
+nexus-rt = { path = "/nix/store/krlanfap664k4g88qgsssxi0818z92r8-Nexus-zkVM-unstable-2024-12-18/runtime" }
+postcard = { version = "1.0.10", default-features = false, features = ["alloc"] }
+
+zkp = { path = "./src/zkp" }
+wrapper_macro = { version = "0.1.0", path = "../wrapper_macro" }
diff --git a/zkvms/nexus/guest/guest.ld b/zkvms/nexus/guest/guest.ld
new file mode 100644
index 0000000..5a4dd4a
--- /dev/null
+++ b/zkvms/nexus/guest/guest.ld
@@ -0,0 +1,73 @@
+ENTRY(_start);
+
+SECTIONS
+{
+  /* Set the default size of the stack.                                                 */
+  /*                                                                                    */
+  /* Because the stack will grow down from this point, and if the heap requests memory  */
+  /* being used by the stack then the runtime will panic, this value also functions as  */
+  /* the memory limit for the guest program execution more generally.                   */
+  __memory_top = 0x6400000;
+  . = 0;
+
+  .text : ALIGN(4)
+  {
+    KEEP(*(.init));
+    . = ALIGN(4);
+    KEEP(*(.init.rust));
+    *(.text .text.*);
+  }
+
+  . = ALIGN(8);
+  . = .* 2;
+
+  .data : ALIGN(4)
+  {
+    /* Must be called __global_pointer$ for linker relaxations to work. */
+    __global_pointer$ = . + 0x800;
+    *(.srodata .srodata.*);
+    *(.rodata .rodata.*);
+    *(.sdata .sdata.* .sdata2 .sdata2.*);
+    *(.data .data.*);
+
+    /* this is used by the global allocator (see:src/lib.rs) */
+    . = ALIGN(4);
+    _heap = .;
+    LONG(_ebss);
+  }
+
+  .bss (NOLOAD) : ALIGN(4)
+  {
+    *(.sbss .sbss.* .bss .bss.*);
+    . = ALIGN(4);
+    _ebss = .;
+    _end = .;
+  }
+
+  /* Dynamic relocations are unsupported. This section is only used to detect
+     relocatable code in the input files and raise an error if relocatable code
+     is found */
+  .got (INFO) :
+  {
+    KEEP(*(.got .got.*));
+  }
+
+  /DISCARD/ :
+  {
+    *(.comment*)
+    *(.debug*)
+  }
+
+  /* Stack unwinding is not supported, but we will keep these for now */
+  .eh_frame (INFO) : { KEEP(*(.eh_frame)) }
+  .eh_frame_hdr (INFO) : { *(.eh_frame_hdr) }
+}
+
+ASSERT(. < __memory_top, "Program is too large for the VM memory.");
+
+ASSERT(SIZEOF(.got) == 0, "
+.got section detected in the input files. Dynamic relocations are not
+supported. If you are linking to C code compiled using the `gcc` crate
+then modify your build script to compile the C code _without_ the
+-fPIC flag. See the documentation of the `gcc::Config.fpic` method for
+details.");
diff --git a/zkvms/nexus/guest/guests b/zkvms/nexus/guest/guests
new file mode 120000
index 0000000..69bc8ed
--- /dev/null
+++ b/zkvms/nexus/guest/guests
@@ -0,0 +1 @@
+../../../guests
\ No newline at end of file
diff --git a/zkvms/nexus/guest/guests_macro b/zkvms/nexus/guest/guests_macro
new file mode 120000
index 0000000..143a0b5
--- /dev/null
+++ b/zkvms/nexus/guest/guests_macro
@@ -0,0 +1 @@
+../../../guests_macro
\ No newline at end of file
diff --git a/zkvms/nexus/guest/src/main.rs b/zkvms/nexus/guest/src/main.rs
new file mode 100644
index 0000000..eb82cde
--- /dev/null
+++ b/zkvms/nexus/guest/src/main.rs
@@ -0,0 +1,17 @@
+#![cfg_attr(target_arch = "riscv32", no_std, no_main, allow(unused_imports))]
+
+use nexus_rt::{ postcard, println, read_private_input, write_output };
+
+extern crate alloc;
+use alloc::vec::Vec;
+use wrapper_macro::make_wrapper;
+
+type Input = (Vec<Vec<bool>>, u32, Vec<Vec<u32>>);
+type Output = bool;
+
+const VERTICES: usize = 100;
+
+#[nexus_rt::main]
+fn main() {
+    zkp::entrypoint_expr!()
+}