diff options
| author |   Alexey Neyman <stilor@att.net> | 2017-02-28 08:57:53 (GMT) |
|---|---|---|
| committer | Alexey Neyman <stilor@att.net> | 2017-02-28 08:57:53 (GMT) |
| commit | 99283866cc84102f22324a751a2ba3afb9221cb6 (patch) | |
| tree | ee8b04c33cf0797e985d0f5476d310e9abb8ba78 /patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch | |
| parent | 439cab379e169f505494376f55f1438d12de94fa (diff) | |
Add patches to Linaro GCC
Same as the base release as long as they applied.
MUSL patches didn't, removed.
Also, unobsolete Linaro GCC5 now that they rolled out a new release.
Signed-off-by: Alexey Neyman <stilor@att.net>
Diffstat (limited to 'patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch')
| -rw-r--r-- | patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch b/patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch new file mode 100644 index 0000000..abc7a08 --- /dev/null +++ b/patches/gcc/linaro-4.8-2015.06/871-xtensa-reimplement-register-spilling.patch @@ -0,0 +1,76 @@ +From 05154174b369505238b759cf80d595d8cfc8c731 Mon Sep 17 00:00:00 2001 +From: Max Filippov <jcmvbkbc@gmail.com> +Date: Mon, 10 Aug 2015 21:35:20 +0300 +Subject: [PATCH 1/3] xtensa: reimplement register spilling + +Spilling windowed registers in userspace is much easier, more portable, +less error-prone and equally effective as in kernel. Now that register +spilling syscall is considered obsolete in the xtensa linux kernel +replace it with CALL12 followed by series of ENTRY in libgcc. + +2015-08-18 Max Filippov <jcmvbkbc@gmail.com> +libgcc/ + * config/xtensa/lib2funcs.S (__xtensa_libgcc_window_spill): Use + CALL12 followed by series of ENTRY to spill windowed registers. + (__xtensa_nonlocal_goto): Call __xtensa_libgcc_window_spill + instead of making linux spill syscall. + +Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> +--- +Backported from: r226962 + + libgcc/config/xtensa/lib2funcs.S | 30 +++++++++++++++++++++++------- + 1 file changed, 23 insertions(+), 7 deletions(-) + +diff --git a/libgcc/config/xtensa/lib2funcs.S b/libgcc/config/xtensa/lib2funcs.S +index 3ac8c1d..2e678af 100644 +--- a/libgcc/config/xtensa/lib2funcs.S ++++ b/libgcc/config/xtensa/lib2funcs.S +@@ -33,10 +33,29 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + .global __xtensa_libgcc_window_spill + .type __xtensa_libgcc_window_spill,@function + __xtensa_libgcc_window_spill: +- entry sp, 32 +- movi a2, 0 +- syscall ++ entry sp, 48 ++#if XCHAL_NUM_AREGS > 16 ++ call12 1f ++ retw ++ .align 4 ++1: ++ .rept (XCHAL_NUM_AREGS - 24) / 12 ++ _entry sp, 48 ++ mov a12, a0 ++ .endr ++ _entry sp, 16 ++#if XCHAL_NUM_AREGS % 12 == 0 ++ mov a4, a4 ++#elif XCHAL_NUM_AREGS % 12 == 4 ++ mov a8, a8 ++#elif XCHAL_NUM_AREGS % 12 == 8 ++ mov a12, a12 ++#endif ++ retw ++#else ++ mov a8, a8 + retw ++#endif + .size __xtensa_libgcc_window_spill, .-__xtensa_libgcc_window_spill + + +@@ -58,10 +77,7 @@ __xtensa_nonlocal_goto: + entry sp, 32 + + /* Flush registers. */ +- mov a5, a2 +- movi a2, 0 +- syscall +- mov a2, a5 ++ call8 __xtensa_libgcc_window_spill + + /* Because the save area for a0-a3 is stored one frame below + the one identified by a2, the only way to restore those +-- +1.8.1.4 + |