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| author | Rich Felker <dalias@aerifal.cx> | 2019-04-10 20:11:19 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-04-10 20:11:19 -0400 |
| commit | 788d5e24ca19c6291cebd8d1ad5b5ed6abf42665 (patch) | |
| tree | 1ae614424b48069950baec8ae09699d750fe3414 /src/internal/sh | |
| parent | 1bcdaeee6e659f1d856717c9aa562a068f2f3bd4 (diff) | |
| download | musl-788d5e24ca19c6291cebd8d1ad5b5ed6abf42665.zip musl-788d5e24ca19c6291cebd8d1ad5b5ed6abf42665.tar.gz musl-788d5e24ca19c6291cebd8d1ad5b5ed6abf42665.tar.bz2 | |
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.
Diffstat (limited to 'src/internal/sh')
| -rw-r--r-- | src/internal/sh/syscall.s | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/src/internal/sh/syscall.s b/src/internal/sh/syscall.s deleted file mode 100644 index 331918a..0000000 --- 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 |