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Diffstat (limited to 'libc/sysdeps/linux/arm/crt1.S')
-rw-r--r--libc/sysdeps/linux/arm/crt1.S64
1 files changed, 64 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/crt1.S b/libc/sysdeps/linux/arm/crt1.S
index ab3b0d2..5da0fe1 100644
--- a/libc/sysdeps/linux/arm/crt1.S
+++ b/libc/sysdeps/linux/arm/crt1.S
@@ -95,6 +95,69 @@ ARM register quick reference:
#include <features.h>
#include <bits/arm_asm.h>
+#if defined(__FDPIC__)
+.text
+ .arm
+ .globl _start
+
+_start:
+ /* Start by self relocation. */
+ sub r4, pc, #8
+ ldr r1, .L__ROFIXUP_LIST__
+ add r1, r1, r4
+ ldr r2, .L__ROFIXUP_END__
+ add r2, r2, r4
+ mov r0, r7
+ push {r9, r10}
+ bl __self_reloc
+ pop {r9, r10}
+ mov r9, r0
+
+ /* Clear the frame pointer since this is the outermost frame. */
+ mov r3, #0
+ mov fp, r3
+
+ /* Now fill __uClibc_main arguments. */
+ sub sp, sp, #16 /* Reserve space for 3 args (keep aligment) */
+ ldr r0, .L_main_got_funcdesc /* r0 GOT FUNCDESC of main */
+ ldr r0, [r9, r0]
+ ldr r1, [sp, #16] /* argc */
+ add r2, sp, #20 /* argv */
+ ldr r3, .L_init_got_funcdesc /* r3 GOT init */
+ ldr r3, [r9, r3]
+ ldr r4, .L_fini_got_funcdesc
+ ldr r4, [r9, r4]
+ str r4, [sp, #0] /* sp + 0 GOT fini */
+ movs r4, r8 /* Test if static binary (r8 is 0 as there is no interpreter). */
+ movne r4, r10
+ moveq r4, #0
+ str r4, [sp, #4] /* sp + 4 got rtld_fini */
+ mov r4, r2 /* stack_end is unused.... */
+ str r4, [sp, #8] /* sp + 8 got stack_end */
+ bl __uClibc_main
+ /* We should never get here.... */
+ bl abort
+.L__ROFIXUP_LIST__:
+ .word __ROFIXUP_LIST__ - _start
+.L__ROFIXUP_END__:
+ .word __ROFIXUP_END__ - _start
+.L_main_got_funcdesc:
+ .word main(GOTFUNCDESC)
+.L_init_got_funcdesc:
+ .word _init(GOTFUNCDESC)
+.L_fini_got_funcdesc:
+ .word _fini(GOTFUNCDESC)
+
+/* 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
+
+#else /* defined(__FDPIC__) */
+
.text
.globl _start
.type _start,%function
@@ -250,3 +313,4 @@ __data_start:
.long 0
.weak data_start
data_start = __data_start
+#endif /* defined(__FDPIC__) */