/* SPDX-License-Identifier: GPL-2.0 */
#
# arch/i386/setjmp.S
#
# setjmp/longjmp for the i386 architecture
#

#
# The jmp_buf is assumed to contain the following, in order:
#       %ebx
#       %esp
#       %ebp
#       %esi
#       %edi
#       <return address>
#

        .text
        .align 4
        .globl kernel_setjmp
        .type kernel_setjmp, @function
kernel_setjmp:
#ifdef _REGPARM
        movl %eax,%edx
#else
        movl 4(%esp),%edx
#endif
        popl %ecx                       # Return address, and adjust the stack
        xorl %eax,%eax                  # Return value
        movl %ebx,(%edx)
        movl %esp,4(%edx)               # Post-return %esp!
        pushl %ecx                      # Make the call/return stack happy
        movl %ebp,8(%edx)
        movl %esi,12(%edx)
        movl %edi,16(%edx)
        movl %ecx,20(%edx)              # Return address
        RET

        .size kernel_setjmp,.-kernel_setjmp

        .text
        .align 4
        .globl kernel_longjmp
        .type kernel_longjmp, @function
kernel_longjmp:
#ifdef _REGPARM
        xchgl %eax,%edx
#else
        movl 4(%esp),%edx               # jmp_ptr address
        movl 8(%esp),%eax               # Return value
#endif
        movl (%edx),%ebx
        movl 4(%edx),%esp
        movl 8(%edx),%ebp
        movl 12(%edx),%esi
        movl 16(%edx),%edi
        jmp *20(%edx)

        .size kernel_longjmp,.-kernel_longjmp