Merge pull request #1380 from Shaikh-Ubaid/wasm_x86_fix_text_format

WASM_X86: Fix text format

Author: certik

src/libasr/codegen/wasm_to_x86.cpp

@@ -55,6 +55,7 @@ class X86Visitor : public WASMDecoder<X86Visitor>,
         switch (func_index) {
             case 0: {  // print_i32
                 m_a.asm_call_label("print_i32");
+                m_a.asm_pop_r32(X86Reg::eax);
                 break;
             }
             case 1: {  // print_i64

src/libasr/codegen/x86_assembler.cpp

@@ -51,7 +51,7 @@ void emit_elf32_header(X86Assembler &a, uint32_t p_flags) {
     a.asm_dw_imm16(2);  // e_type
     a.asm_dw_imm16(3);  // e_machine
     a.asm_dd_imm32(1);  // e_version
-    a.asm_dd_label("e_entry");  // e_entry
+    a.asm_dd_label("_start");  // e_entry
     a.asm_dd_label("e_phoff");  // e_phoff
     a.asm_dd_imm32(0);  // e_shoff
     a.asm_dd_imm32(0);  // e_flags
@@ -80,8 +80,7 @@ void emit_elf32_header(X86Assembler &a, uint32_t p_flags) {
 }
 
 void emit_elf32_footer(X86Assembler &a) {
-    a.add_var("e_entry", a.get_defined_symbol("_start").value);
-    a.add_var("filesize", a.pos()-a.origin());
+    a.add_var_size("filesize");
 }
 
 void emit_exit(X86Assembler &a, const std::string &name,

src/libasr/codegen/x86_assembler.h

@@ -362,7 +362,8 @@ class X86Assembler {
             m_asm_code = "BITS 64\n";
             emit("    ", "org " + i2s((uint64_t)m_origin) + "\n"); // specify origin info
         } else {
-            m_asm_code = "BITS 32\n\n";
+            m_asm_code = "BITS 32\n";
+            emit("    ", "org " + i2s(m_origin) + "\n"); // specify origin info
         }
 #endif
     }

src/lpython/tests/test_asm.cpp

@@ -65,6 +65,7 @@ TEST_CASE("Store and get instructions") {
     std::string asm_code = a.get_asm();
     std::string ref = S(R"""(
 BITS 32
+    org 0x08048000
 
     pop eax
     jz 0x0d
@@ -300,6 +301,7 @@ TEST_CASE("Memory operand") {
     std::string asm_code = a.get_asm();
     std::string ref = S(R"""(
 BITS 32
+    org 0x08048000
 
     inc [ebx]
     inc [ebx+3]
@@ -369,6 +371,7 @@ TEST_CASE("elf32 binary") {
     std::string asm_code = a.get_asm();
     std::string ref = S(R"""(
 BITS 32
+    org 0x08048000
 
 ehdr:
     db 0x7f
@@ -390,7 +393,7 @@ BITS 32
     dw 0x0002
     dw 0x0003
     dd 0x00000001
-    dd e_entry
+    dd _start
     dd e_phoff
     dd 0x00000000
     dd 0x00000000
@@ -444,10 +447,7 @@ e_phoff equ 0x00000034
     mov ebx, 0x00000000
     int 0x80
 
-e_entry equ 0x08048061
-
-
-filesize equ 0x00000088
+filesize equ $ - $$
 
 )""");
     CHECK(asm_code == ref);