Linux - Datatype to large to pass by value?

[JupiterRider]

Folder structure:

.
├── foo.c
├── go.mod
├── go.sum
├── libfoo.so
└── main.go

foo.c

#include <stdio.h>

typedef struct Texture {
    unsigned int id;
    int width;
    int height;
    int mipmaps;
    int format;
} Texture;

void PrintTexture(Texture t) {
    printf("id: %d, width: %d, height: %d, ", t.id, t.width, t.height);
    printf("mipmaps: %d, format: %d\n", t.mipmaps, t.format);
}

Compile foo.c into .so library:
gcc -shared -o libfoo.so foo.c

Set LD_LIBRARY_PATH:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(pwd)

main.go

package main

import (
	"unsafe"

	"github.com/ebitengine/purego"
)

type Texture2D struct {
	Id                             uint32
	Width, Height, Mipmaps, Format int32
}

func main() {
	lib, err := purego.Dlopen("libfoo.so", purego.RTLD_NOW|purego.RTLD_GLOBAL)
	if err != nil {
		panic(err)
	}

	defer func() {
		if err := purego.Dlclose(lib); err != nil {
			panic(err)
		}
	}()

	t := Texture2D{1, 64, 64, 1, 7}
	var printTexture func(uintptr)
	purego.RegisterLibFunc(&printTexture, lib, "PrintTexture")
	printTexture(*(*uintptr)(unsafe.Pointer(&t)))
}

go run . prints the following output:
id: 0, width: 0, height: 0, mipmaps: 0, format: 0

Changing the fields to 8-bit datatype:

typedef struct Texture {
    unsigned char id;
    unsigned char width;
    unsigned char height;
    unsigned char mipmaps;
    unsigned char format;
} Texture;

type Texture2D struct {
	Id                             byte
	Width, Height, Mipmaps, Format byte
}

The result is correct then:
id: 1, width: 64, height: 64, mipmaps: 1, format: 7

[JupiterRider]

Btw: Using the same code as above on Windows, will result in a crash. But changing this line to a pointer will make it work then:
printTexture(uintptr(unsafe.Pointer(&t)))

Why can I pass a pointer, when the C function needs a struct?

[TotallyGamerJet]

Purego does not support structs. You can change the C code to take a pointer to a struct which is allowed.

[TotallyGamerJet]

Why can I pass a pointer, when the C function needs a struct?

This has to do with the Windows ABI. I'm unfamiliar with that ABI but I'm assuming that's just how they pass structs.

[JupiterRider]

Purego does not support structs. You can change the C code to take a pointer to a struct which is allowed.

@TotallyGamerJet Are there any plans to support structs or is this impossible with Linux?

[TotallyGamerJet]

Hopefully, but I don't have the bandwidth to do it. Currently, #88 tracks structs and has some workarounds for macOS. Please close this if there are no additional issues