asm_amd64.s

#include "textflag.h"

DATA b<>+0(SB)/8,  $0x0011223344556677
DATA b<>+8(SB)/8,  $"strconst"
DATA b<>+16(SB)/8, $3.141592
DATA b<>+24(SB)/4, $3.141592
// 28-31: empty
DATA b<>+32(SB)/4, $0x00112233
DATA b<>+36(SB)/2, $0x4455
DATA b<>+38(SB)/1, $0x66
DATA b<>+39(SB)/1, $0x77
// 40-42: empty
DATA b<>+43(SB)/4,  $"hey"
// 47: empty
GLOBL b<>(SB), RODATA, $48

TEXT ·DataAt(SB),0,$0-9
	MOVQ	i+0(FP), AX
	LEAQ	b<>+0x00(SB), BX
	MOVB	0(BX)(AX*1), CL
	MOVB	CL, ret+8(FP)
	RET

main.go

package main

import (
	"encoding/hex"
	"fmt"
)

const Size = 48

func DataAt(i int) byte

func ReadDataSection() []byte {
	b := make([]byte, Size)
	for i := 0; i < Size; i++ {
		b[i] = DataAt(i)
	}
	return b
}

func main() {
	b := ReadDataSection()
	fmt.Print(hex.Dump(b))
}

output.txt

00000000  77 66 55 44 33 22 11 00  73 74 72 63 6f 6e 73 74  |wfUD3"..strconst|
00000010  7a 00 8b fc fa 21 09 40  d8 0f 49 40 00 00 00 00  |z....!.@..I@....|
00000020  33 22 11 00 55 44 66 77  00 00 00 68 65 79 00 00  |3"..UDfw...hey..|

Experiment with DATA sections in Go assembly. Confirms that:

• Data types and sizes can be mixed.
• Not all bytes have to be specified. Unspecified bytes are zero in this case, but I am not sure that's specified.