mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-07 05:13:21 +09:00
![Alexander Graf](/assets/img/avatar_default.png)
Commit e677724
(arm: Fix setjmp) added code to fix compilation of the setjmp
code path with thumv1. Unfortunately it missed a constraint that the adr
instruction can only refer to 4 byte aligned offsets.
So this patch adds the required alignment hooks to make compilation
work again even when setjmp doesn't happen to be 4 byte aligned.
Signed-off-by: Alexander Graf <agraf@suse.de>
Tested-by: Tom Rini <trini@konsulko.com>
101 lines
1.8 KiB
C
101 lines
1.8 KiB
C
/*
|
|
* (C) Copyright 2016
|
|
* Alexander Graf <agraf@suse.de>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _SETJMP_H_
|
|
#define _SETJMP_H_ 1
|
|
|
|
struct jmp_buf_data {
|
|
ulong target;
|
|
ulong regs[5];
|
|
};
|
|
|
|
typedef struct jmp_buf_data jmp_buf[1];
|
|
|
|
static inline int setjmp(jmp_buf jmp)
|
|
{
|
|
long r = 0;
|
|
|
|
#ifdef CONFIG_ARM64
|
|
asm volatile(
|
|
"adr x1, jmp_target\n"
|
|
"str x1, %1\n"
|
|
"stp x26, x27, %2\n"
|
|
"stp x28, x29, %3\n"
|
|
"mov x1, sp\n"
|
|
"str x1, %4\n"
|
|
"b 2f\n"
|
|
"jmp_target: "
|
|
"mov %0, #1\n"
|
|
"2:\n"
|
|
: "+r" (r), "=m" (jmp->target),
|
|
"=m" (jmp->regs[0]), "=m" (jmp->regs[2]),
|
|
"=m" (jmp->regs[4])
|
|
:
|
|
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
|
|
"x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
|
|
"x16", "x17", "x18", "x19", "x20", "x21", "x22",
|
|
"x23", "x24", "x25", /* x26, x27, x28, x29, sp */
|
|
"x30", "cc", "memory");
|
|
#else
|
|
asm volatile(
|
|
#ifdef CONFIG_SYS_THUMB_BUILD
|
|
".align 2\n"
|
|
"adr r0, jmp_target\n"
|
|
"add r0, r0, $1\n"
|
|
#else
|
|
"adr r0, jmp_target\n"
|
|
#endif
|
|
"mov r1, %1\n"
|
|
"mov r2, sp\n"
|
|
"stm r1!, {r0, r2, r4, r5, r6, r7}\n"
|
|
"b 2f\n"
|
|
".align 2\n"
|
|
"jmp_target: \n"
|
|
"mov %0, #1\n"
|
|
"2:\n"
|
|
: "+l" (r)
|
|
: "l" (&jmp->target)
|
|
: "r0", "r1", "r2", "r3", /* "r4", "r5", "r6", "r7", */
|
|
"r8", "r9", "r10", "r11", /* sp, */ "ip", "lr",
|
|
"cc", "memory");
|
|
#endif
|
|
|
|
return r;
|
|
}
|
|
|
|
static inline __noreturn void longjmp(jmp_buf jmp)
|
|
{
|
|
#ifdef CONFIG_ARM64
|
|
asm volatile(
|
|
"ldr x0, %0\n"
|
|
"ldr x1, %3\n"
|
|
"mov sp, x1\n"
|
|
"ldp x26, x27, %1\n"
|
|
"ldp x28, x25, %2\n"
|
|
"mov x29, x25\n"
|
|
"br x0\n"
|
|
:
|
|
: "m" (jmp->target), "m" (jmp->regs[0]), "m" (jmp->regs[2]),
|
|
"m" (jmp->regs[4])
|
|
: "x0", "x1", "x25", "x26", "x27", "x28");
|
|
#else
|
|
asm volatile(
|
|
"mov r1, %0\n"
|
|
"ldm r1!, {r0, r2, r4, r5, r6, r7}\n"
|
|
"mov sp, r2\n"
|
|
"bx r0\n"
|
|
:
|
|
: "l" (&jmp->target)
|
|
: "r1");
|
|
#endif
|
|
|
|
while (1) { }
|
|
}
|
|
|
|
|
|
#endif /* _SETJMP_H_ */
|