feat: Add riscv32-linux bin0

fix #1

bin0/powerpc64le-linux/README.md

@@ -9,8 +9,6 @@ This is compatible with:
 - aarch64
 - riscv32
 - riscv64
-- i686
-- x86_64
 
 ## Syscalls of interest
 

bin0/riscv32-linux/README.md

@@ -0,0 +1,18 @@
+# Bin0 for powerpc64le-linux
+
+- 32 bit words
+- little endian
+
+This is compatible with:
+
+- armv7l
+- aarch64
+- powerpc64le
+- riscv64
+
+## Syscalls of interest
+
+- `exit` - 93
+- `read` - 63
+- `write` - 64
+- `openat` - 56

bin0/riscv32-linux/bin0.S

@@ -0,0 +1,59 @@
+.section .text
+.global _start
+
+_start:
+    lw a0, 0(sp) // get argc
+    slti t0, a0, 3 // check if argc < 3
+    bnez t0, exit // if so, exit
+
+    li a0, -100 // AT_FDCWD
+    lw a1, 8(sp) // first argument
+    li a2, 0 // O_RDONLY
+    li a3, 0 // no mode
+    li a7, 56 // openat
+    ecall
+    bltz a0, exit // if error, exit
+    mv s0, a0 // save file descriptor
+
+    li a0, -100 // AT_FDCWD
+    lw a1, 12(sp) // second argument
+    li a2, 577 // O_TRUNC | O_CREAT | O_WRONLY
+    li a3, 493 // rwxr-xr-x
+    li a7, 56 // openat
+    ecall
+    bltz a0, exit // if error, exit
+    mv s1, a0 // save file descriptor
+
+.Lloop_init:
+    li s2, 0 // Load accumulator
+    li s3, 32 // Counter
+.Lread_loop:
+    mv a0, s0 // source fd
+    mv a1, sp // dest buffer
+    li a2, 1 // size
+    li a7, 63 // read
+    ecall
+    slti t0, a0, 1 // check if read was successful
+    bnez t0, exit // if not, exit
+    
+    lbu a0, 0(sp) // read the byte
+    andi a1, a0, 0xFE // clear the bottom bit
+    xori a1, a1, 0x30 // Invert the number bit mask
+    bnez a1, .Lread_loop // if it’s not a number, loop
+    andi a0, a0, 0x01 // get the number bit
+    slli s2, s2, 1 // shift the number bit into the accumulator
+    or s2, s2, a0
+    addi s3, s3, -1 // decrement counter
+    bnez s3, .Lread_loop // if counter is not zero, loop
+
+    sw s2, 0(sp) // store the number in the buffer
+    mv a0, s1 // destination fd
+    mv a1, sp // source buffer
+    li a2, 4 // size
+    li a7, 64 // write
+    ecall
+    bltz a0, exit // if error, exit
+    j .Lloop_init // loop
+exit:
+    li a7, 93
+    ecall

bin0/riscv32-linux/bin0.bin0

@@ -0,0 +1,59 @@
+#.section .text
+#.global _start
+#
+#_start:
+#    lw aO, O(sp) // get argc
+#    slti tO, aO, 3 // check if argc < 3
+#    bnez tO, exit // if so, exit
+#
+#    li aO, -lOO // AT_FDCWD
+#    lw al, 8(sp) // first argument
+#    li a2, O // O_RDONLY
+#    li a3, O // no mode
+#    li a7, 56 // openat
+#    ecall
+#    bltz aO, exit // if error, exit
+#    mv sO, aO // save file descriptor
+#
+#    li aO, -lOO // AT_FDCWD
+#    lw al, l2(sp) // second argument
+#    li a2, 577 // O_TRUNC | O_CREAT | O_WRONLY
+#    li a3, 493 // rwxr-xr-x
+#    li a7, 56 // openat
+#    ecall
+#    bltz aO, exit // if error, exit
+#    mv sl, aO // save file descriptor
+#
+#.Lloop_init:
+#    li s2, O // Load accumulator
+#    li s3, 32 // Counter
+#.Lread_loop:
+#    mv aO, sO // source fd
+#    mv al, sp // dest buffer
+#    li a2, l // size
+#    li a7, 63 // read
+#    ecall
+#    slti tO, aO, l // check if read was successful
+#    bnez tO, exit // if not, exit
+#    
+#    lbu aO, O(sp) // read the byte
+#    andi al, aO, OxFE // clear the bottom bit
+#    xori al, al, Ox3O // Invert the number bit mask
+#    bnez al, .Lread_loop // if it’s not a number, loop
+#    andi aO, aO, OxOl // get the number bit
+#    slli s2, s2, l // shift the number bit into the accumulator
+#    or s2, s2, aO
+#    addi s3, s3, -l // decrement counter
+#    bnez s3, .Lread_loop // if counter is not zero, loop
+#
+#    sw s2, O(sp) // store the number in the buffer
+#    mv aO, sl // destination fd
+#    mv al, sp // source buffer
+#    li a2, 4 // size
+#    li a7, 64 // write
+#    ecall
+#    bltz aO, exit // if error, exit
+#    j .Lloop_init // loop
+#exit:
+#    li a7, 93
+#    ecall

flake.lock

@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1645765209,
+        "lastModified": 1646955661,
-        "narHash": "sha256-tLpNZlpCjWpbbxhDgQ/e5z2fL1RZGLYJWkkCOJNqlcI=",
+        "narHash": "sha256-AYLta1PubJnrkv15+7G+6ErW5m9NcI9wSdJ+n7pKAe0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "056c34167d3210a674ef21691afbbce1ed63f8ca",
+        "rev": "e9545762b032559c27d8ec9141ed63ceca1aa1ac",
         "type": "github"
       },
       "original": {

lib/default.nix

@@ -9,6 +9,9 @@ system: { nixpkgs, ... } @ args: rec {
   prebuilts = "${allPrebuilds}/${system}";
 
   baseDerivation = { script, ... } @args: builtins.derivation (args // {
+    __contentAddressed = true;
+    outputHashMode = "recursive";
+    outputHashAlgo = "sha256";
     inherit system;
     builder = "${prebuilts}/busybox";
     args = [