Commit-ID: a268fcfaa6ab2ef740fda5ecf947aca45ccd535d Gitweb: http://git.kernel.org/tip/a268fcfaa6ab2ef740fda5ecf947aca45ccd535d Author: Borislav Petkov <bp@xxxxxxxxx> AuthorDate: Tue, 31 May 2011 22:21:51 +0200 Committer: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> CommitDate: Fri, 3 Jun 2011 14:38:49 -0700 x86, asm: Thin down SAVE/RESTORE_* asm macros Use dwarf2 cfi annotation macros, making SAVE/RESTORE_* marginally more readable. No functionality change. Signed-off-by: Borislav Petkov <bp@xxxxxxxxx> Link: http://lkml.kernel.org/r/1306873314-32523-2-git-send-email-bp@xxxxxxxxx Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx> --- arch/x86/include/asm/calling.h | 101 ++++++++++++++++------------------------ 1 files changed, 41 insertions(+), 60 deletions(-) diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h index 30af5a8..b67e06c 100644 --- a/arch/x86/include/asm/calling.h +++ b/arch/x86/include/asm/calling.h @@ -46,6 +46,7 @@ For 32-bit we have the following conventions - kernel is built with */ +#include "dwarf2.h" /* * 64-bit system call stack frame layout defines and helpers, for @@ -87,30 +88,25 @@ For 32-bit we have the following conventions - kernel is built with .macro SAVE_ARGS addskip=0, norcx=0, nor891011=0 subq $9*8+\addskip, %rsp CFI_ADJUST_CFA_OFFSET 9*8+\addskip - movq %rdi, 8*8(%rsp) - CFI_REL_OFFSET rdi, 8*8 - movq %rsi, 7*8(%rsp) - CFI_REL_OFFSET rsi, 7*8 - movq %rdx, 6*8(%rsp) - CFI_REL_OFFSET rdx, 6*8 + movq_cfi rdi, 8*8 + movq_cfi rsi, 7*8 + movq_cfi rdx, 6*8 + .if \norcx .else - movq %rcx, 5*8(%rsp) - CFI_REL_OFFSET rcx, 5*8 + movq_cfi rcx, 5*8 .endif - movq %rax, 4*8(%rsp) - CFI_REL_OFFSET rax, 4*8 + + movq_cfi rax, 4*8 + .if \nor891011 .else - movq %r8, 3*8(%rsp) - CFI_REL_OFFSET r8, 3*8 - movq %r9, 2*8(%rsp) - CFI_REL_OFFSET r9, 2*8 - movq %r10, 1*8(%rsp) - CFI_REL_OFFSET r10, 1*8 - movq %r11, (%rsp) - CFI_REL_OFFSET r11, 0*8 + movq_cfi r8, 3*8 + movq_cfi r9, 2*8 + movq_cfi r10, 1*8 + movq_cfi r11, 0*8 .endif + .endm #define ARG_SKIP (9*8) @@ -119,37 +115,34 @@ For 32-bit we have the following conventions - kernel is built with skipr8910=0, skiprdx=0 .if \skipr11 .else - movq (%rsp), %r11 - CFI_RESTORE r11 + movq_cfi_restore 0*8, r11 .endif + .if \skipr8910 .else - movq 1*8(%rsp), %r10 - CFI_RESTORE r10 - movq 2*8(%rsp), %r9 - CFI_RESTORE r9 - movq 3*8(%rsp), %r8 - CFI_RESTORE r8 + movq_cfi_restore 1*8, r10 + movq_cfi_restore 2*8, r9 + movq_cfi_restore 3*8, r8 .endif + .if \skiprax .else - movq 4*8(%rsp), %rax - CFI_RESTORE rax + movq_cfi_restore 4*8, rax .endif + .if \skiprcx .else - movq 5*8(%rsp), %rcx - CFI_RESTORE rcx + movq_cfi_restore 5*8, rcx .endif + .if \skiprdx .else - movq 6*8(%rsp), %rdx - CFI_RESTORE rdx + movq_cfi_restore 6*8, rdx .endif - movq 7*8(%rsp), %rsi - CFI_RESTORE rsi - movq 8*8(%rsp), %rdi - CFI_RESTORE rdi + + movq_cfi_restore 7*8, rsi + movq_cfi_restore 8*8, rdi + .if ARG_SKIP+\addskip > 0 addq $ARG_SKIP+\addskip, %rsp CFI_ADJUST_CFA_OFFSET -(ARG_SKIP+\addskip) @@ -176,33 +169,21 @@ For 32-bit we have the following conventions - kernel is built with .macro SAVE_REST subq $REST_SKIP, %rsp CFI_ADJUST_CFA_OFFSET REST_SKIP - movq %rbx, 5*8(%rsp) - CFI_REL_OFFSET rbx, 5*8 - movq %rbp, 4*8(%rsp) - CFI_REL_OFFSET rbp, 4*8 - movq %r12, 3*8(%rsp) - CFI_REL_OFFSET r12, 3*8 - movq %r13, 2*8(%rsp) - CFI_REL_OFFSET r13, 2*8 - movq %r14, 1*8(%rsp) - CFI_REL_OFFSET r14, 1*8 - movq %r15, (%rsp) - CFI_REL_OFFSET r15, 0*8 + movq_cfi rbx, 5*8 + movq_cfi rbp, 4*8 + movq_cfi r12, 3*8 + movq_cfi r13, 2*8 + movq_cfi r14, 1*8 + movq_cfi r15, 0*8 .endm .macro RESTORE_REST - movq (%rsp), %r15 - CFI_RESTORE r15 - movq 1*8(%rsp), %r14 - CFI_RESTORE r14 - movq 2*8(%rsp), %r13 - CFI_RESTORE r13 - movq 3*8(%rsp), %r12 - CFI_RESTORE r12 - movq 4*8(%rsp), %rbp - CFI_RESTORE rbp - movq 5*8(%rsp), %rbx - CFI_RESTORE rbx + movq_cfi_restore 0*8, r15 + movq_cfi_restore 1*8, r14 + movq_cfi_restore 2*8, r13 + movq_cfi_restore 3*8, r12 + movq_cfi_restore 4*8, rbp + movq_cfi_restore 5*8, rbx addq $REST_SKIP, %rsp CFI_ADJUST_CFA_OFFSET -(REST_SKIP) .endm -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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