From df037172a710c7ce6bbb6fd1ea0883469e8592a5 Mon Sep 17 00:00:00 2001 From: Andreas Jaeger Date: Mon, 10 Feb 2003 08:25:44 +0000 Subject: Rework: %r9 is destroyed by functions so don't use it as temporary, align stack correctly, fix parameter for CDISABLE. 2003-02-09 Andreas Jaeger * sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h: Rework: %r9 is destroyed by functions so don't use it as temporary, align stack correctly, fix parameter for CDISABLE. --- .../sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h | 78 +++++++++++----------- 1 file changed, 38 insertions(+), 40 deletions(-) (limited to 'linuxthreads/sysdeps/unix') diff --git a/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h index ca8183f4e9..bc3b8676fb 100644 --- a/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h +++ b/linuxthreads/sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2002 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek , 2002. @@ -37,60 +37,58 @@ jae SYSCALL_ERROR_LABEL; \ ret; \ L(pseudo_cancel): \ + /* Save registers that might get destroyed. */ \ SAVESTK_##args \ PUSHARGS_##args \ CENABLE \ + /* Restore registers. */ \ POPARGS_##args \ - movq %rax, OLDTYPE_##args; \ + /* The return value from CENABLE is argument for CDISABLE. */ \ + movq %rax, (%rsp); \ movq $SYS_ify (syscall_name), %rax; \ syscall; \ - xchgq %rax, OLDTYPE_##args; \ + movq (%rsp), %rdi; \ + /* Save %rax since it's the error code from the syscall. */ \ + movq %rax, 8(%rsp); \ CDISABLE \ - movq OLDTYPE_##args, %rax; \ + movq 8(%rsp), %rax; \ RESTSTK_##args \ cmpq $-4095, %rax; \ jae SYSCALL_ERROR_LABEL; \ L(pseudo_end): # define PUSHARGS_0 /* Nothing. */ -# define PUSHARGS_1 PUSHARGS_0 movq %rdi, (%rsp); -# define PUSHARGS_2 PUSHARGS_1 movq %rsi, 8(%rsp); -# define PUSHARGS_3 PUSHARGS_2 movq %rdx, 16(%rsp); -# define PUSHARGS_4 PUSHARGS_3 movq %rcx, 24(%rsp); -# define PUSHARGS_5 PUSHARGS_4 movq %r8, 32(%rsp); -# define PUSHARGS_6 PUSHARGS_5 movq %r9, 40(%rsp); +# define PUSHARGS_1 PUSHARGS_0 movq %rdi, 8(%rsp); +# define PUSHARGS_2 PUSHARGS_1 movq %rsi, 16(%rsp); +# define PUSHARGS_3 PUSHARGS_2 movq %rdx, 24(%rsp); +# define PUSHARGS_4 PUSHARGS_3 movq %rcx, 32(%rsp); +# define PUSHARGS_5 PUSHARGS_4 movq %r8, 40(%rsp); +# define PUSHARGS_6 PUSHARGS_5 movq %r9, 48(%rsp); # define POPARGS_0 /* Nothing. */ -# define POPARGS_1 POPARGS_0 movq (%rsp), %rdi; -# define POPARGS_2 POPARGS_1 movq 8(%rsp), %rsi; -# define POPARGS_3 POPARGS_2 movq 16(%rsp), %rdx; -# define POPARGS_4 POPARGS_3 movq 24(%rsp), %r10; -# define POPARGS_5 POPARGS_4 movq 32(%rsp), %r8; -# define POPARGS_6 POPARGS_5 movq 40(%rsp), %r9; - -# define SAVESTK_0 /* Nothing. */ -# define SAVESTK_1 subq $16, %rsp; -# define SAVESTK_2 SAVESTK_1; -# define SAVESTK_3 subq $32, %rsp; -# define SAVESTK_4 SAVESTK_3; -# define SAVESTK_5 subq $48, %rsp; -# define SAVESTK_6 subq $64, %rsp; - -# define RESTSTK_0 /* Nothing. */ -# define RESTSTK_1 addq $16, %rsp; -# define RESTSTK_2 RESTSTK_1; -# define RESTSTK_3 addq $32, %rsp; -# define RESTSTK_4 RESTSTK_3; -# define RESTSTK_5 addq $48, %rsp; -# define RESTSTK_6 addq $64, %rsp; - -# define OLDTYPE_0 %r9 -# define OLDTYPE_1 OLDTYPE_0 -# define OLDTYPE_2 OLDTYPE_0 -# define OLDTYPE_3 OLDTYPE_0 -# define OLDTYPE_4 OLDTYPE_0 -# define OLDTYPE_5 OLDTYPE_0 -# define OLDTYPE_6 48(%rsp) +# define POPARGS_1 POPARGS_0 movq 8(%rsp), %rdi; +# define POPARGS_2 POPARGS_1 movq 16(%rsp), %rsi; +# define POPARGS_3 POPARGS_2 movq 24(%rsp), %rdx; +# define POPARGS_4 POPARGS_3 movq 32(%rsp), %r10; +# define POPARGS_5 POPARGS_4 movq 40(%rsp), %r8; +# define POPARGS_6 POPARGS_5 movq 48(%rsp), %r9; + +/* We always have to align the stack before calling a function. */ +# define SAVESTK_0 subq $24, %rsp; +# define SAVESTK_1 SAVESTK_0 +# define SAVESTK_2 SAVESTK_1 +# define SAVESTK_3 subq $40, %rsp; +# define SAVESTK_4 SAVESTK_3 +# define SAVESTK_5 subq $56, %rsp; +# define SAVESTK_6 SAVESTK_5 + +# define RESTSTK_0 addq $24,%rsp; +# define RESTSTK_1 RESTSTK_0 +# define RESTSTK_2 RESTSTK_1 +# define RESTSTK_3 addq $40, %rsp; +# define RESTSTK_4 RESTSTK_3 +# define RESTSTK_5 addq $56, %rsp; +# define RESTSTK_6 RESTSTK_5 # ifdef IS_IN_libpthread # define CENABLE call __pthread_enable_asynccancel; -- cgit v1.2.3