From 788d5e24ca19c6291cebd8d1ad5b5ed6abf42665 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Wed, 10 Apr 2019 20:11:19 -0400 Subject: remove external __syscall function and last remaining users the weak version of __syscall_cp_c was using a tail call to __syscall to avoid duplicating the 6-argument syscall code inline in small static-linked programs, but now that __syscall no longer exists, the inline expansion is no longer duplication. the syscall.h machinery suppported up to 7 syscall arguments, only via an external __syscall function, but we presently have no syscall call points that actually make use of that many, and the kernel only defines 7-argument calling conventions for arm, powerpc (32-bit), and sh. if it turns out we need them in the future, they can easily be added. --- src/internal/sh/syscall.s | 23 ----------------------- 1 file changed, 23 deletions(-) delete mode 100644 src/internal/sh/syscall.s (limited to 'src/internal/sh') diff --git a/src/internal/sh/syscall.s b/src/internal/sh/syscall.s deleted file mode 100644 index 331918a5..00000000 --- a/src/internal/sh/syscall.s +++ /dev/null @@ -1,23 +0,0 @@ -.global __syscall -.hidden __syscall -.type __syscall, @function -__syscall: - ! The kernel syscall entry point documents that the trap number indicates - ! the number of arguments being passed, but it then ignores that information. - ! Since we do not actually know how many arguments are being passed, we will - ! say there are six, since that is the maximum we support here. - mov r4, r3 - mov r5, r4 - mov r6, r5 - mov r7, r6 - mov.l @r15, r7 - mov.l @(4,r15), r0 - mov.l @(8,r15), r1 - trapa #31 - or r0, r0 - or r0, r0 - or r0, r0 - or r0, r0 - or r0, r0 - rts - nop -- cgit v1.2.1