diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2023-03-19 00:28:35 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2023-05-17 15:08:22 +0200 |
| commit | cdd87465adfd75e4ebd11507575533c6bf7a5525 (patch) | |
| tree | edbfc5cad69af12b4755c8795fe6d51c59485183 /arch/arm/vfp/entry.S | |
| parent | 6ee1e6772e1e19436f573672de5ff8aab7163be6 (diff) | |
ARM: vfp: Use undef hook for handling VFP exceptions
Now that the VFP support code has been reimplemented as a C function
that takes a struct pt_regs pointer and an opcode, we can use the
existing undef_hook framework to deal with undef exceptions triggered by
VFP instructions instead of having special handling in assembler.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'arch/arm/vfp/entry.S')
| -rw-r--r-- | arch/arm/vfp/entry.S | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S deleted file mode 100644 index 547c94c62cd3..000000000000 --- a/arch/arm/vfp/entry.S +++ /dev/null @@ -1,31 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/arm/vfp/entry.S - * - * Copyright (C) 2004 ARM Limited. - * Written by Deep Blue Solutions Limited. - */ -#include <linux/init.h> -#include <linux/linkage.h> -#include <asm/thread_info.h> -#include <asm/vfpmacros.h> -#include <asm/assembler.h> -#include <asm/asm-offsets.h> - -@ VFP entry point. -@ -@ r0 = instruction opcode (32-bit ARM or two 16-bit Thumb) -@ r2 = PC value to resume execution after successful emulation -@ r9 = normal "successful" return address -@ r10 = this threads thread_info structure -@ lr = unrecognised instruction return address -@ IRQs enabled. -@ -ENTRY(do_vfp) - mov r1, r0 @ pass trigger opcode via R1 - mov r0, sp @ pass struct pt_regs via R0 - bl vfp_support_entry @ dispatch the VFP exception - cmp r0, #0 @ handled successfully? - reteq r9 @ then use R9 as return address - ret lr @ pass to undef handler -ENDPROC(do_vfp) |