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| author | Jan Beulich <jbeulich@suse.com> | 2012-10-30 16:44:43 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2012-10-30 16:44:43 +0100 |
| commit | 4d246723a85a03406e4969a260291e11b8e05960 (patch) | |
| tree | 751253390a81fff3466e53780d5883816a50da81 /xen/include/asm-x86/x86_64 | |
| parent | f8189da5cb099a90bf5d5b41cce2b187531d8bce (diff) | |
| download | xen-4d246723a85a03406e4969a260291e11b8e05960.tar.gz xen-4d246723a85a03406e4969a260291e11b8e05960.tar.bz2 xen-4d246723a85a03406e4969a260291e11b8e05960.zip | |
x86: use MOV instead of PUSH/POP when saving/restoring register state
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/include/asm-x86/x86_64')
| -rw-r--r-- | xen/include/asm-x86/x86_64/asm_defns.h | 81 |
1 files changed, 45 insertions, 36 deletions
diff --git a/xen/include/asm-x86/x86_64/asm_defns.h b/xen/include/asm-x86/x86_64/asm_defns.h index 27d7205601..d1660b24c8 100644 --- a/xen/include/asm-x86/x86_64/asm_defns.h +++ b/xen/include/asm-x86/x86_64/asm_defns.h @@ -5,11 +5,11 @@ #ifdef CONFIG_FRAME_POINTER /* Indicate special exception stack frame by inverting the frame pointer. */ -#define SETUP_EXCEPTION_FRAME_POINTER \ - movq %rsp,%rbp; \ +#define SETUP_EXCEPTION_FRAME_POINTER(offs) \ + leaq offs(%rsp),%rbp; \ notq %rbp #else -#define SETUP_EXCEPTION_FRAME_POINTER +#define SETUP_EXCEPTION_FRAME_POINTER(offs) #endif #ifndef NDEBUG @@ -27,40 +27,49 @@ #define ASSERT_INTERRUPTS_DISABLED ASSERT_INTERRUPT_STATUS(z) #define SAVE_ALL \ + addq $-(UREGS_error_code-UREGS_r15), %rsp; \ cld; \ - pushq %rdi; \ - pushq %rsi; \ - pushq %rdx; \ - pushq %rcx; \ - pushq %rax; \ - pushq %r8; \ - pushq %r9; \ - pushq %r10; \ - pushq %r11; \ - pushq %rbx; \ - pushq %rbp; \ - SETUP_EXCEPTION_FRAME_POINTER; \ - pushq %r12; \ - pushq %r13; \ - pushq %r14; \ - pushq %r15; + movq %rdi,UREGS_rdi(%rsp); \ + movq %rsi,UREGS_rsi(%rsp); \ + movq %rdx,UREGS_rdx(%rsp); \ + movq %rcx,UREGS_rcx(%rsp); \ + movq %rax,UREGS_rax(%rsp); \ + movq %r8,UREGS_r8(%rsp); \ + movq %r9,UREGS_r9(%rsp); \ + movq %r10,UREGS_r10(%rsp); \ + movq %r11,UREGS_r11(%rsp); \ + movq %rbx,UREGS_rbx(%rsp); \ + movq %rbp,UREGS_rbp(%rsp); \ + SETUP_EXCEPTION_FRAME_POINTER(UREGS_rbp); \ + movq %r12,UREGS_r12(%rsp); \ + movq %r13,UREGS_r13(%rsp); \ + movq %r14,UREGS_r14(%rsp); \ + movq %r15,UREGS_r15(%rsp); \ + +#ifdef __ASSEMBLY__ +.macro LOAD_C_CLOBBERED + movq UREGS_r11(%rsp),%r11 + movq UREGS_r10(%rsp),%r10 + movq UREGS_r9(%rsp),%r9 + movq UREGS_r8(%rsp),%r8 + movq UREGS_rax(%rsp),%rax + movq UREGS_rcx(%rsp),%rcx + movq UREGS_rdx(%rsp),%rdx + movq UREGS_rsi(%rsp),%rsi + movq UREGS_rdi(%rsp),%rdi +.endm -#define RESTORE_ALL \ - popq %r15; \ - popq %r14; \ - popq %r13; \ - popq %r12; \ - popq %rbp; \ - popq %rbx; \ - popq %r11; \ - popq %r10; \ - popq %r9; \ - popq %r8; \ - popq %rax; \ - popq %rcx; \ - popq %rdx; \ - popq %rsi; \ - popq %rdi; +.macro RESTORE_ALL adj=0 + movq UREGS_r15(%rsp),%r15 + movq UREGS_r14(%rsp),%r14 + movq UREGS_r13(%rsp),%r13 + movq UREGS_r12(%rsp),%r12 + movq UREGS_rbp(%rsp),%rbp + movq UREGS_rbx(%rsp),%rbx + LOAD_C_CLOBBERED + subq $-(UREGS_error_code-UREGS_r15+\adj), %rsp +.endm +#endif #ifdef PERF_COUNTERS #define PERFC_INCR(_name,_idx,_cur) \ @@ -94,7 +103,7 @@ __asm__( \ "\n" __ALIGN_STR"\n" \ "common_interrupt:\n\t" \ - STR(SAVE_ALL) \ + STR(SAVE_ALL) "\n\t" \ "movq %rsp,%rdi\n\t" \ "callq " STR(do_IRQ) "\n\t" \ "jmp ret_from_intr\n"); |