From 437fd90c0250dee670290f9b714253671a990160 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Wed, 18 May 2016 13:18:31 +0300 Subject: These changes are the raw update to qemu-2.6. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Collission happened in the following patches: migration: do cleanup operation after completion(738df5b9) Bug fix.(1750c932f86) kvmclock: add a new function to update env->tsc.(b52baab2) The code provided by the patches was already in the upstreamed version. Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a Signed-off-by: José Pekkarinen --- qemu/roms/ipxe/src/arch/i386/core/setjmp.S | 84 +++++++++++++++++++----------- 1 file changed, 53 insertions(+), 31 deletions(-) (limited to 'qemu/roms/ipxe/src/arch/i386/core/setjmp.S') diff --git a/qemu/roms/ipxe/src/arch/i386/core/setjmp.S b/qemu/roms/ipxe/src/arch/i386/core/setjmp.S index 03727148c..81d3b4911 100644 --- a/qemu/roms/ipxe/src/arch/i386/core/setjmp.S +++ b/qemu/roms/ipxe/src/arch/i386/core/setjmp.S @@ -1,42 +1,64 @@ -/* setjmp and longjmp. Use of these functions is deprecated. */ - -FILE_LICENCE ( GPL2_OR_LATER ) +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) .text .arch i386 .code32 - -/************************************************************************** -SETJMP - Save stack context for non-local goto -**************************************************************************/ + + /* Must match jmp_buf structure layout */ + .struct 0 +env_retaddr: .long 0 +env_stack: .long 0 +env_ebx: .long 0 +env_esi: .long 0 +env_edi: .long 0 +env_ebp: .long 0 + .previous + +/* + * Save stack context for non-local goto + */ .globl setjmp setjmp: - movl 4(%esp),%ecx /* jmpbuf */ - movl 0(%esp),%edx /* return address */ - movl %edx,0(%ecx) - movl %ebx,4(%ecx) - movl %esp,8(%ecx) - movl %ebp,12(%ecx) - movl %esi,16(%ecx) - movl %edi,20(%ecx) - movl $0,%eax + /* Get jmp_buf pointer in %edx */ + movl 4(%esp),%edx + /* Save return address */ + movl 0(%esp),%eax + movl %eax, env_retaddr(%edx) + /* Save stack pointer */ + movl %esp, env_stack(%edx) + /* Save other registers */ + movl %ebx, env_ebx(%edx) + movl %esi, env_esi(%edx) + movl %edi, env_edi(%edx) + movl %ebp, env_ebp(%edx) + /* Return 0 when returning as setjmp() */ + xorl %eax, %eax ret + .size setjmp, . - setjmp -/************************************************************************** -LONGJMP - Non-local jump to a saved stack context -**************************************************************************/ +/* + * Non-local jump to a saved stack context + */ .globl longjmp longjmp: - movl 4(%esp),%edx /* jumpbuf */ - movl 8(%esp),%eax /* result */ - movl 0(%edx),%ecx - movl 4(%edx),%ebx - movl 8(%edx),%esp - movl 12(%edx),%ebp - movl 16(%edx),%esi - movl 20(%edx),%edi - cmpl $0,%eax - jne 1f - movl $1,%eax -1: movl %ecx,0(%esp) + /* Get jmp_buf pointer in %edx */ + movl 4(%esp),%edx + /* Get result in %eax */ + movl 8(%esp),%eax + /* Force result to non-zero */ + testl %eax, %eax + jnz 1f + incl %eax +1: /* Restore stack pointer */ + movl env_stack(%edx), %esp + /* Restore other registers */ + movl env_ebx(%edx), %ebx + movl env_esi(%edx), %esi + movl env_edi(%edx), %edi + movl env_ebp(%edx), %ebp + /* Replace return address on the new stack */ + popl %ecx /* discard */ + pushl env_retaddr(%edx) + /* Return to setjmp() caller */ ret + .size longjmp, . - longjmp -- cgit 1.2.3-korg