Add new command line switch --thumb-entry.

1 files changed, 10 insertions, 1 deletions

diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index 43e7e82..9e720de 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -3879,7 +3879,7 @@ not itself call any subroutines).
 @section @code{ld}'s support for interworking between ARM and Thumb code
 
 @cindex ARM interworking support
-@cindex --support-old-code
+@kindex --support-old-code
 For the ARM, @code{ld} will generate code stubs to allow functions calls
 betweem ARM and Thumb code.  These stubs only work with code that has
 been compiled and assembled with the @samp{-mthumb-interwork} command
@@ -3891,6 +3891,15 @@ which will work with non-interworking aware ARM code.  Note, however,
 the linker does not support generating stubs for function calls to
 non-interworking aware Thumb code.
 
+@cindex thumb entry point
+@cindex entry point, thumb
+@kindex --thumb-entry=@var{entry}
+The @samp{--thumb-entry} switch is a duplicate of the generic
+@samp{--entry} switch, in that it sets the program's starting address.  
+But it also sets the bottom bit of the address, so that it can be
+branched to using a BX instruction, and the program will start
+executing in Thumb mode straight away.
+
 @ifclear GENERIC
 @lowersections
 @end ifclear