From c175b21ce470a07875a5db86f21439f02f93df0e Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Wed, 13 Sep 2023 17:10:20 +1200 Subject: gcc: Bring in upstream fixes for CVE-2023-4039 Bring in the fixes for GCC 7 through 13. https://rtx.meta.security/mitigation/2023/09/12/CVE-2023-4039.html https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64 Signed-off-by: Chris Packham --- ...licitly-handle-frames-with-no-saved-regis.patch | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 packages/gcc/8.5.0/0026-aarch64-Explicitly-handle-frames-with-no-saved-regis.patch (limited to 'packages/gcc/8.5.0/0026-aarch64-Explicitly-handle-frames-with-no-saved-regis.patch') diff --git a/packages/gcc/8.5.0/0026-aarch64-Explicitly-handle-frames-with-no-saved-regis.patch b/packages/gcc/8.5.0/0026-aarch64-Explicitly-handle-frames-with-no-saved-regis.patch new file mode 100644 index 00000000..7e32ce8e --- /dev/null +++ b/packages/gcc/8.5.0/0026-aarch64-Explicitly-handle-frames-with-no-saved-regis.patch @@ -0,0 +1,43 @@ +From f9e1c86b3397faa8dee4bbaeaf8b56492e3a63df Mon Sep 17 00:00:00 2001 +From: Richard Sandiford +Date: Fri, 16 Jun 2023 17:00:51 +0100 +Subject: [PATCH 26/32] aarch64: Explicitly handle frames with no saved + registers + +If a frame has no saved registers, it can be allocated in one go. +There is no need to treat the areas below and above the saved +registers as separate. + +This is a no-op as thing stand, since a leaf function will have +no outgoing arguments, and so all the frame will be above where +the saved registers normally go. + +gcc/ + * config/aarch64/aarch64.c (aarch64_layout_frame): Explicitly + allocate the frame in one go if there are no saved registers. +--- + gcc/config/aarch64/aarch64.c | 8 +++++--- + 1 file changed, 5 insertions(+), 3 deletions(-) + +diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c +index 4ad73220337f..ed9e2a28f914 100644 +--- a/gcc/config/aarch64/aarch64.c ++++ b/gcc/config/aarch64/aarch64.c +@@ -4215,9 +4215,11 @@ aarch64_layout_frame (void) + max_push_offset = 256; + + HOST_WIDE_INT const_size, const_fp_offset; +- if (cfun->machine->frame.frame_size.is_constant (&const_size) +- && const_size < max_push_offset +- && known_eq (crtl->outgoing_args_size, 0)) ++ if (cfun->machine->frame.saved_regs_size == 0) ++ cfun->machine->frame.initial_adjust = cfun->machine->frame.frame_size; ++ else if (cfun->machine->frame.frame_size.is_constant (&const_size) ++ && const_size < max_push_offset ++ && known_eq (crtl->outgoing_args_size, 0)) + { + /* Simple, small frame with no outgoing arguments: + stp reg1, reg2, [sp, -frame_size]! +-- +2.42.0 + -- cgit v1.2.3