Implement syscall for arm32

src/llvm_backend_proc.cpp

@@ -2036,6 +2036,31 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
 					}
 				}
 				break;
+			case TargetArch_arm32:
+				{
+					// TODO(bill): Check this is correct
+					GB_ASSERT(arg_count <= 7);
+
+					char asm_string[] = "svc #0";
+					gbString constraints = gb_string_make(heap_allocator(), "={r0}");
+					for (unsigned i = 0; i < arg_count; i++) {
+						constraints = gb_string_appendc(constraints, ",{");
+						static char const *regs[] = {
+							"r8",
+							"r0",
+							"r1",
+							"r2",
+							"r3",
+							"r4",
+							"r5",
+						};
+						constraints = gb_string_appendc(constraints, regs[i]);
+						constraints = gb_string_appendc(constraints, "}");
+					}
+
+					inline_asm = llvm_get_inline_asm(func_type, make_string_c(asm_string), make_string_c(constraints));
+				}
+				break;
 			default:
 				GB_PANIC("Unsupported platform");
 			}