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-rw-r--r--ldso/ldso/arm/dl-syscalls.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/ldso/ldso/arm/dl-syscalls.h b/ldso/ldso/arm/dl-syscalls.h
index 4b42a57e0..ecbe96a1c 100644
--- a/ldso/ldso/arm/dl-syscalls.h
+++ b/ldso/ldso/arm/dl-syscalls.h
@@ -4,4 +4,39 @@
extern int _dl_errno;
#undef __set_errno
#define __set_errno(X) {(_dl_errno) = (X);}
+/* _call_via_rX calls are used in thumb ldso because of calls via
+ * function pointers, but ldso is not linked with anything which
+ * provides them, so define them here (only required for thumb).
+ */
+#if defined(__thumb__)
+asm(
+ ".macro call_via register\n"
+ " .global _call_via_\\register\n"
+ " .hidden _call_via_\\register\n"
+ " .type _call_via_\\register, %function\n"
+ " .thumb_func\n"
+ "_call_via_\\register:\n"
+ " bx \\register\n"
+ " .size _call_via_\\register, . - _call_via_\\register\n"
+ ".endm\n"
+ ".text\n"
+ ".thumb\n"
+ ".align 1\n"
+ " call_via r0\n"
+ " call_via r1\n"
+ " call_via r2\n"
+ " call_via r3\n"
+ " call_via r4\n"
+ " call_via r5\n"
+ " call_via r6\n"
+ " call_via r7\n"
+ " call_via r8\n"
+ " call_via r9\n"
+ " call_via r10\n"
+ " call_via r11\n"
+ " call_via r12\n"
+ " call_via r13\n"
+ " call_via r14\n"
+);
+#endif