+ gprof startup code

git-svn-id: trunk@9482 -

rtl/linux/arm/gprt0.as

@@ -0,0 +1,92 @@
+/*
+                At this entry point, most registers' values are unspecified, except:
+
+   a1		Contains a function pointer to be registered with `atexit'.
+		This is how the dynamic linker arranges to have DT_FINI
+		functions called for shared libraries that have been loaded
+		before this code runs.
+
+   sp		The stack contains the arguments and environment:
+		0(sp)			argc
+		4(sp)			argv[0]
+		...
+		(4*argc)(sp)		NULL
+		(4*(argc+1))(sp)	envp[0]
+		...
+					NULL
+*/
+
+	.text
+	.globl _start
+	.type _start,#function
+_start:
+	/* Clear the frame pointer since this is the outermost frame.  */
+	mov fp, #0
+	ldmia   sp!, {a2}
+
+	/* Pop argc off the stack and save a pointer to argv */
+	ldr ip,=operatingsystem_parameter_argc
+	ldr a3,=operatingsystem_parameter_argv
+	str a2,[ip]
+
+	/* calc envp */
+	add a2,a2,#1
+	add a2,sp,a2,LSL #2
+	ldr ip,=operatingsystem_parameter_envp
+
+	str sp,[a3]
+   	str a2,[ip]
+
+        ldr     r1,=_etext                 /* Initialize gmon */
+        ldr     r0,=_start
+        bl      monstartup
+        ldr     r0,=_mcleanup
+        bl      atexit
+
+        /* Save initial stackpointer */
+	ldr ip,=__stkptr
+	str sp,[ip]
+
+	/* Let the libc call main and exit with its return code.  */
+	bl PASCALMAIN
+
+	.globl  _haltproc
+    .type   _haltproc,#function
+_haltproc:
+        /* r0 contains exitcode */
+	swi 0x900001
+	b _haltproc
+
+	/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.globl __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start
+
+.bss
+        .comm __stkptr,4
+
+        .comm operatingsystem_parameter_envp,4
+        .comm operatingsystem_parameter_argc,4
+        .comm operatingsystem_parameter_argv,4
+
+	.section ".comment"
+	.byte 0
+	.ascii "generated by FPC http://www.freepascal.org\0"
+
+/* We need this stuff to make gdb behave itself, otherwise
+   gdb will chokes with SIGILL when trying to debug apps.
+*/
+        .section ".note.ABI-tag", "a"
+        .align 4
+        .long 1f - 0f
+        .long 3f - 2f
+        .long  1
+0:      .asciz "GNU"
+1:      .align 4
+2:      .long 0
+        .long 2,0,0
+3:      .align 4
+