Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/arm26/lib/csumpartialcopyuser.S b/arch/arm26/lib/csumpartialcopyuser.S
new file mode 100644
index 0000000..5b82118
--- /dev/null
+++ b/arch/arm26/lib/csumpartialcopyuser.S
@@ -0,0 +1,115 @@
+/*
+ * linux/arch/arm26/lib/csumpartialcopyuser.S
+ *
+ * Copyright (C) 1995-1998 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/errno.h>
+#include <asm/asm_offsets.h>
+
+ .text
+
+ .macro save_regs
+ stmfd sp!, {r1 - r2, r4 - r9, fp, ip, lr, pc}
+ mov r9, sp, lsr #13
+ mov r9, r9, lsl #13
+ ldr r9, [r9, #TSK_ADDR_LIMIT]
+ mov r9, r9, lsr #24
+ .endm
+
+ .macro load_regs,flags
+ ldm\flags fp, {r1, r2, r4-r9, fp, sp, pc}^
+ .endm
+
+ .macro load1b, reg1
+ tst r9, #0x01
+9999: ldreqbt \reg1, [r0], #1
+ ldrneb \reg1, [r0], #1
+ .section __ex_table, "a"
+ .align 3
+ .long 9999b, 6001f
+ .previous
+ .endm
+
+ .macro load2b, reg1, reg2
+ tst r9, #0x01
+9999: ldreqbt \reg1, [r0], #1
+ ldrneb \reg1, [r0], #1
+9998: ldreqbt \reg2, [r0], #1
+ ldrneb \reg2, [r0], #1
+ .section __ex_table, "a"
+ .long 9999b, 6001f
+ .long 9998b, 6001f
+ .previous
+ .endm
+
+ .macro load1l, reg1
+ tst r9, #0x01
+9999: ldreqt \reg1, [r0], #4
+ ldrne \reg1, [r0], #4
+ .section __ex_table, "a"
+ .align 3
+ .long 9999b, 6001f
+ .previous
+ .endm
+
+ .macro load2l, reg1, reg2
+ tst r9, #0x01
+ ldmneia r0!, {\reg1, \reg2}
+9999: ldreqt \reg1, [r0], #4
+9998: ldreqt \reg2, [r0], #4
+ .section __ex_table, "a"
+ .long 9999b, 6001f
+ .long 9998b, 6001f
+ .previous
+ .endm
+
+ .macro load4l, reg1, reg2, reg3, reg4
+ tst r9, #0x01
+ ldmneia r0!, {\reg1, \reg2, \reg3, \reg4}
+9999: ldreqt \reg1, [r0], #4
+9998: ldreqt \reg2, [r0], #4
+9997: ldreqt \reg3, [r0], #4
+9996: ldreqt \reg4, [r0], #4
+ .section __ex_table, "a"
+ .long 9999b, 6001f
+ .long 9998b, 6001f
+ .long 9997b, 6001f
+ .long 9996b, 6001f
+ .previous
+ .endm
+
+/*
+ * unsigned int
+ * csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *err_ptr)
+ * r0 = src, r1 = dst, r2 = len, r3 = sum, [sp] = *err_ptr
+ * Returns : r0 = checksum, [[sp, #0], #0] = 0 or -EFAULT
+ */
+
+#define FN_ENTRY ENTRY(csum_partial_copy_from_user)
+
+#include "csumpartialcopygeneric.S"
+
+/*
+ * FIXME: minor buglet here
+ * We don't return the checksum for the data present in the buffer. To do
+ * so properly, we would have to add in whatever registers were loaded before
+ * the fault, which, with the current asm above is not predictable.
+ */
+ .align 4
+6001: mov r4, #-EFAULT
+ ldr r5, [fp, #4] @ *err_ptr
+ str r4, [r5]
+ ldmia sp, {r1, r2} @ retrieve dst, len
+ add r2, r2, r1
+ mov r0, #0 @ zero the buffer
+6002: teq r2, r1
+ strneb r0, [r1], #1
+ bne 6002b
+ load_regs ea