From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/arm/lib/csumpartialcopyuser.S | 83 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 arch/arm/lib/csumpartialcopyuser.S (limited to 'arch/arm/lib/csumpartialcopyuser.S') diff --git a/arch/arm/lib/csumpartialcopyuser.S b/arch/arm/lib/csumpartialcopyuser.S new file mode 100644 index 000000000..6928781e6 --- /dev/null +++ b/arch/arm/lib/csumpartialcopyuser.S @@ -0,0 +1,83 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/lib/csumpartialcopyuser.S + * + * Copyright (C) 1995-1998 Russell King + * + * 27/03/03 Ian Molton Clean up CONFIG_CPU + */ +#include +#include +#include +#include + + .text + +#ifdef CONFIG_CPU_SW_DOMAIN_PAN + .macro save_regs + mrc p15, 0, ip, c3, c0, 0 + stmfd sp!, {r1, r2, r4 - r8, ip, lr} + uaccess_enable ip + .endm + + .macro load_regs + ldmfd sp!, {r1, r2, r4 - r8, ip, lr} + mcr p15, 0, ip, c3, c0, 0 + ret lr + .endm +#else + .macro save_regs + stmfd sp!, {r1, r2, r4 - r8, lr} + .endm + + .macro load_regs + ldmfd sp!, {r1, r2, r4 - r8, pc} + .endm +#endif + + .macro load1b, reg1 + ldrusr \reg1, r0, 1 + .endm + + .macro load2b, reg1, reg2 + ldrusr \reg1, r0, 1 + ldrusr \reg2, r0, 1 + .endm + + .macro load1l, reg1 + ldrusr \reg1, r0, 4 + .endm + + .macro load2l, reg1, reg2 + ldrusr \reg1, r0, 4 + ldrusr \reg2, r0, 4 + .endm + + .macro load4l, reg1, reg2, reg3, reg4 + ldrusr \reg1, r0, 4 + ldrusr \reg2, r0, 4 + ldrusr \reg3, r0, 4 + ldrusr \reg4, r0, 4 + .endm + +/* + * unsigned int + * csum_partial_copy_from_user(const char *src, char *dst, int len) + * r0 = src, r1 = dst, r2 = len + * Returns : r0 = checksum or 0 + */ + +#define FN_ENTRY ENTRY(csum_partial_copy_from_user) +#define FN_EXIT ENDPROC(csum_partial_copy_from_user) + +#include "csumpartialcopygeneric.S" + +/* + * We report fault by returning 0 csum - impossible in normal case, since + * we start with 0xffffffff for initial sum. + */ + .pushsection .text.fixup,"ax" + .align 4 +9001: mov r0, #0 + load_regs + .popsection -- cgit v1.2.3