get asm symbolic source debugging working with gnu assembler and gdb psyq builds

code/duffle/gp.h

@@ -85,4 +85,4 @@ typedef def_struct(gp_Vec2) {
 	U16 y;
 };
 
-extern void gp_screen_init();
+void gp_screen_init();

code/graphics_hello_psyq/hello_gpu.s

@@ -1,11 +1,9 @@
-.include "./toolchain/pcsx-redux/src/mips/common/crt0/crt0.s"
+// .include "./toolchain/pcsx-redux/src/mips/common/crt0/crt0.s"
 
-.include "./asmdd/dsl.asm"
-.include "./asmdd/io.asm"
-.include "./asmdd/gp.asm"
+.include "./asmdd/dsl.s"
+.include "./asmdd/io.s"
+.include "./asmdd/gp.s"
 
-#.section .text.gp, "ax, @progbits"
-#.align 2
 .global gp_screen_init
 .type gp_screen_init, @function
 gp_screen_init:
@@ -15,7 +13,6 @@ gp_screen_init:
 	#define gp1 gpio_port1(rio_offset)
 
 	gcmd_push gp1, rtmp_1, gp_Reset
-	nop; nop;
 	gcmd_push gp1, rtmp_1, gp_DisplayEnabled
 	jump_reg  rret_addr; nop
 

scripts/build_psyq.ps1

@@ -17,7 +17,7 @@ if ((test-path $path_build) -eq $false) {
 # Assumes 'mipsel-none-elf' toolchain is in your system's PATH.
 $Prefix    = "mipsel-none-elf"
 $Compiler  = "$($Prefix)-gcc"
-$Assembler = $Compiler
+$Assembler = "$($Prefix)-as"
 $Objcopy   = "$($Prefix)-objcopy"
 
 # --- GCC/MIPS Flags ---
@@ -78,7 +78,7 @@ $f_objcopy_format   = "-O"
 
 $path_pcsx_redux    = join-path $path_toolchain  'pcsx-redux'
 $path_nugget        = join-path $path_pcsx_redux 'src/mips'
-# $path_nugget_common = join-path $path_nugget     'common'
+$path_nugget_common = join-path $path_nugget     'common'
 $path_psyq          = join-path $path_toolchain  'psyq-4_7'
 $path_psyq_iwyu     = join-path $path_toolchain  'psyq_iwyu'
 $path_psyq_imyu_inc = join-path $path_psyq_iwyu  'include'
@@ -111,7 +111,7 @@ function assemble-unit { param(
 
     write-host "Assembling '$unit' -> '$link_module'" -ForegroundColor Cyan
     $assemble_args | ForEach-Object { Write-Host "`t$_" -ForegroundColor Green }
-		& $Assembler $assemble_args
+		& $Compiler $assemble_args
     if ($LASTEXITCODE -ne 0) { write-error "Compilation failed for $unit. Aborting."; exit 1 }
 }
 function compile-unit { param(
@@ -147,7 +147,8 @@ function compile-unit { param(
 
 	$compile_args += $user_compile_args
 
-	$compile_args += $f_compile, $unit, ($f_output + $link_module)
+	$compile_args += $f_compile
+	$compile_args += $unit, ($f_output + $link_module)
 
     write-host "Compiling '$unit' -> '$link_module'" -ForegroundColor Cyan
     $compile_args | ForEach-Object { Write-Host "`t$_" -ForegroundColor Green }
@@ -216,10 +217,14 @@ function link-modules { param(
 
 	$final_link_args = @($link_args) + ($f_output + $elf)
 
+	$base_name = [System.IO.Path]::GetFileNameWithoutExtension($elf)
+	$dasm      = "$(join-path $path_build $base_name).dasm"
+
 	write-host "Linking modules into '$elf'"  -ForegroundColor Cyan
 	$final_link_args += ($f_link_pass_through_prefix + $f_link_end_group)
 	$final_link_args | foreach-object { write-host $_ }
 		& $Compiler $final_link_args
+		& mipsel-none-elf-objdump.exe -W $elf >> $dasm
 	if ($LASTEXITCODE -ne 0) { write-error "Linking failed. Aborting."; exit 1 }
 }
 function make-binary { param(
@@ -270,13 +275,17 @@ function build-graphis_hello {
 
 	$path_module = join-path $path_code 'graphics_hello_psyq'
 
-	$src_asm    = join-path $path_module 'hello_gpu.asm'
+	$src_asm_crt    = join-path $path_nugget_common 'crt0/crt0.s'
+	$module_asm_crt = join-path $path_build         'crt0.o'
+
+	$src_asm    = join-path $path_module 'hello_gpu.s'
 	$module_asm = join-path $path_build  'hello_gpu.o'
 
 	$assemble_args = @()
 	$assemble_args += $f_debug
 	$assemble_args += $f_optimize_none
 	$assemble_args += ($f_include + $path_code)
+	assemble-unit $src_asm_crt $module_asm_crt     $includes $assemble_args
 	assemble-unit $src_asm     $module_asm $includes $assemble_args
 
 	$src_c    = join-path $path_module 'hello_gpu.c'
@@ -295,7 +304,7 @@ function build-graphis_hello {
 	$link_args = @()
 	$link_args += $f_debug
 	# $link_args += $f_optimize_size
-	link-modules @($module_asm, $module_c) $elf $link_args
+	link-modules @($module_asm_crt, $module_asm, $module_c) $elf $link_args
 	make-binary $elf $exe
 }
 build-graphis_hello