para compilar con geany y arm-gcc

bash.s

@@ -0,0 +1,26 @@
+.section .text
+
+.global main
+main:
+
+.code 32
+    add r6,pc,#1
+    bx  r6
+
+.code 16     
+    /*write()*/
+	mov  r2,#6
+    mov  r1,pc
+    add  r1,#12
+    mov  r0,$0x1 
+    mov  r7,$0x4
+    svc  0
+
+     /*exit()*/
+     sub r0,r0,r0      /*0=1-1*/ 
+     mov r7,$0x1
+     svc 0
+
+
+
+.ascii "lsusb\n"

hello.s

@@ -0,0 +1,28 @@
+    .syntax unified  
+
+        @ --------------------------------  
+    .global main  
+    main:  
+        @ Stack the return address (lr) in addition to a dummy register (ip) to  
+        @ keep the stack 8-byte aligned.  
+        push    {ip, lr}  
+
+        @ Load the argument and perform the call. This is like 'printf("...")' in C.  
+        ldr     r0, =message  
+        bl      printf  
+
+        @ Exit from 'main'. This is like 'return 0' in C.  
+        mov     r0, #0    @ Return 0.  
+
+        @ Pop the dummy ip to reverse our alignment fix, and pop the original lr  
+        @ value directly into pc — the Program Counter — to return.  
+        pop     {ip, pc}  
+
+        @ --------------------------------  
+        @ Data for the printf calls. The GNU assembler's ".asciz" directive  
+        @ automatically adds a NULL character termination.  
+    message:  
+        .asciz "vamos within temptation.\n"  
+
+
+

lsusb.s

@@ -0,0 +1,25 @@
+.section .text
+
+.global main
+main:
+
+.code 32
+    add r6,pc,#1
+    bx  r6
+
+.code 16     
+    /*write()*/
+	mov  r2,#6
+    mov  r1,pc
+    add  r1,#14
+    mov  r0,$0x1 
+    mov  r7,$0x4
+    svc  1
+
+     /*exit()*/
+     sub r4,r4,r4
+     mov r0,r4      
+     mov r7,$0x1
+     svc 1
+
+.ascii "lsusb\n"

prueba1.s

@@ -0,0 +1,9 @@
+.global main
+
+main:
+     mov r1,#5
+     mov r2,#7
+     add r0,r1,r2
+     bx lr
+
+

shell.s

@@ -0,0 +1,33 @@
+/*
+r0  0
+r1  /bin/sh
+r2  /bin/sh
+
+r7 11
+
+*/
+
+
+.section .text
+
+.global main
+main:
+
+.code 32
+    add r6,pc,#1
+    bx  r6
+
+.code 16     
+
+	mov  r0,pc    /*guardomos el program counter en r0*/
+	add  r0,#10 
+
+    str  r3,[sp,#4]
+    add  r1,sp,#4
+    sub  r2,r2,r2
+    mov  r7,#11
+    svc  1
+
+
+
+.ascii "//bin/sh\n"