From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arthur Chunqi Li Subject: [PATCH v4 1/2] kvm-unit-tests : Add setjmp/longjmp to libcflat Date: Wed, 17 Jul 2013 14:05:52 +0800 Message-ID: <1374041153-32235-2-git-send-email-yzt356@gmail.com> References: <1374041153-32235-1-git-send-email-yzt356@gmail.com> Cc: jan.kiszka@web.de, gleb@redhat.com, pbonzini@redhat.com, Arthur Chunqi Li To: kvm@vger.kernel.org Return-path: Received: from mail-pd0-f172.google.com ([209.85.192.172]:36237 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751876Ab3GQGGL (ORCPT ); Wed, 17 Jul 2013 02:06:11 -0400 Received: by mail-pd0-f172.google.com with SMTP id z10so1475711pdj.17 for ; Tue, 16 Jul 2013 23:06:11 -0700 (PDT) In-Reply-To: <1374041153-32235-1-git-send-email-yzt356@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: Add setjmp and longjmp functions to libcflat. Now these two functions are only supported in X86_64 arch. New files added: lib/x86/setjmp64.S lib/x86/setjmp64.c Signed-off-by: Arthur Chunqi Li --- config-x86_64.mak | 2 ++ lib/setjmp.h | 11 +++++++++++ lib/x86/setjmp64.S | 27 +++++++++++++++++++++++++++ 3 files changed, 40 insertions(+) create mode 100644 lib/setjmp.h create mode 100644 lib/x86/setjmp64.S diff --git a/config-x86_64.mak b/config-x86_64.mak index 4e525f5..91ffcce 100644 --- a/config-x86_64.mak +++ b/config-x86_64.mak @@ -4,6 +4,8 @@ bits = 64 ldarch = elf64-x86-64 CFLAGS += -D__x86_64__ +cflatobjs += lib/x86/setjmp64.o + tests = $(TEST_DIR)/access.flat $(TEST_DIR)/apic.flat \ $(TEST_DIR)/emulator.flat $(TEST_DIR)/idt_test.flat \ $(TEST_DIR)/xsave.flat $(TEST_DIR)/rmap_chain.flat \ diff --git a/lib/setjmp.h b/lib/setjmp.h new file mode 100644 index 0000000..eca70d9 --- /dev/null +++ b/lib/setjmp.h @@ -0,0 +1,11 @@ +#ifndef LIBCFLAT_SETJMP64_H +#define LIBCFLAT_SETJMP64_H + +#include "libcflat.h" + +typedef char jmp_buf[64]; + +void longjmp(jmp_buf env, int val); +int setjmp(jmp_buf env); + +#endif diff --git a/lib/x86/setjmp64.S b/lib/x86/setjmp64.S new file mode 100644 index 0000000..c8ae790 --- /dev/null +++ b/lib/x86/setjmp64.S @@ -0,0 +1,27 @@ +.globl setjmp +setjmp: + mov (%rsp), %rsi + mov %rsi, (%rdi) + mov %rsp, 0x8(%rdi) + mov %rbp, 0x10(%rdi) + mov %rbx, 0x18(%rdi) + mov %r12, 0x20(%rdi) + mov %r13, 0x28(%rdi) + mov %r14, 0x30(%rdi) + mov %r15, 0x38(%rdi) + xor %eax, %eax + ret + +.globl longjmp +longjmp: + mov %esi, %eax + mov 0x38(%rdi), %r15 + mov 0x30(%rdi), %r14 + mov 0x28(%rdi), %r13 + mov 0x20(%rdi), %r12 + mov 0x18(%rdi), %rbx + mov 0x10(%rdi), %rbp + mov 0x8(%rdi), %rsp + mov (%rdi), %rsi + mov %rsi, (%rsp) + ret -- 1.7.9.5