make sh clone asm fdpic-compatible

clone calls back to a function pointer provided by the caller, which
will actually be a pointer to a function descriptor on fdpic. the
obvious solution is to have a separate version of clone for fdpic, but
I have taken a simpler approach to go around the problem. instead of
calling the pointed-to function from asm, a direct call is made to an
internal C function which then calls the pointed-to function. this
lets the C compiler generate the appropriate calling convention for an
indirect call with no need for ABI-specific assembly.

This commit is contained in:

Rich Felker

2015-09-12 02:55:28 +00:00

parent ad5d8a2bf3

commit 234c58467c

2 changed files with 14 additions and 3 deletions

									
										arch/sh/src/__shcall.c
									
		+5
		
												View File
												
				@@ -0,0 +1,5 @@

				__attribute__((__visibility__("hidden")))

				int __shcall(void *arg, int (*func)(void *))

				{

					return func(arg);

				}