X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/a02a22d4b55d233ada2e030a44065f464b79f137..61bd904b61ef893246791746517ef7a38ed732db:/base/asm-common.h

diff --git a/base/asm-common.h b/base/asm-common.h
index 8745ea43..0af9cb58 100644
--- a/base/asm-common.h
+++ b/base/asm-common.h
@@ -149,6 +149,50 @@ _where_am_i.\got :
 #endif
 
 ///--------------------------------------------------------------------------
+/// ARM-specific hacking.
+
+#if CPUFAM_ARM
+
+// Set the function hooks.
+#define FUNC_PREHOOK(_) .balign 4
+#define ENDFUNC_HOOK(name) .ltorg
+
+// Call external subroutine at ADDR, possibly via PLT.
+	.macro	callext addr, cond=
+#if WANT_PIC
+	bl\cond	\addr(PLT)
+#else
+	bl\cond	\addr
+#endif
+	.endm
+
+// Do I need to arrange a spare GOT register?
+#if WANT_PIC
+#  define NEED_GOT 1
+#endif
+#define GOTREG r9
+
+// Maybe load GOT address into GOT.
+	.macro	ldgot	got=r9
+#if WANT_PIC
+	ldr	\got, =_GLOBAL_OFFSET_TABLE_ - . - 12
+	add	\got, pc, \got
+#endif
+	.endm
+
+// Load address of external symbol ADDR into REG, maybe using GOT.
+	.macro	leaext	reg, addr, cond=, got=GOTREG
+#if WANT_PIC
+	ldr	\reg, =\addr(GOT)
+	ldr	\reg, [\got, \reg]
+#else
+	ldr	\reg, =\addr
+#endif
+	.endm
+
+#endif
+
+///--------------------------------------------------------------------------
 /// Final stuff.
 
 // Default values for the various hooks.