We can allocate string literals and global variables in the .data section of an

Question

We can allocate string literals and global variables in the .data section of an assembly language program.
Write MARS directives which would allocate the following C-like variables in the .data section.

char ch1 = ' ', ch2 = '$';
// Assume char variables/values are 1-byte
int x = 0, y = -1, z;
// Assume int variables/values are 4-bytes
char *name = "Marge Simpson";
// name is a label assoc'd with the address of the first char
int iarray[250] = { 0 };
// iarray is an array of 250 ints, all initialized to 0
char carray[250] = { 0 };
// carray is an array of 250 chars, all initialized to 0

Explanation / Answer

.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.globl ch1
.data
.type ch1, @object
.size ch1, 1
ch1:
.byte 32
.globl ch2
.type ch2, @object
.size ch2, 1
ch2:
.byte 42
b)

.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.globl x
.section .bss,"aw",@nobits
.align 2
.type x, @object
.size x, 4
x:
.space 4
.globl y
.data
.align 2
.type y, @object
.size y, 4
y:
.word -1
.globl z
.section .bss
.align 2
.type z, @object
.size z, 4
z:
.space 4
(c)

.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.globl name
.rdata
.align 2
$LC0:
.ascii "marge simpson"
.section .data.rel.local,"aw",@progbits
.align 2
.type name, @object
.size name, 4
name:
.word $LC0
(d)

.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.globl arrayi
.section .bss,"aw",@nobits
.align 2
.type arrayi, @object
.size arrayi, 1000
arrayi:
.space 1000
(e)

.file 1 ""
.section .mdebug.abi32
.previous
.gnu_attribute 4, 1
.abicalls
.globl arrayi
.section .bss,"aw",@nobits
.align 2
.type arrayi, @object
.size arrayi, 1000
arrayi:
.space 1000

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