On x86 the global data pointer is stored in register fs. On x86_64 no register is used for the global data pointer.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- doc/develop/global_data.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/develop/global_data.rst b/doc/develop/global_data.rst index 9e7c8a24da..230ebcd860 100644 --- a/doc/develop/global_data.rst +++ b/doc/develop/global_data.rst @@ -33,8 +33,10 @@ On most architectures the global data pointer is stored in a register. +------------+----------+ | SuperH | r13 | +------------+----------+ +| x86 32bit | fs | ++------------+----------+

-The sandbox, x86, and Xtensa are notable exceptions. +The sandbox, x86_64, and Xtensa are notable exceptions.

Clang for ARM does not support assigning a global register. When using Clang gd is defined as an inline function using assembly code. This adds a few bytes -- 2.28.0