Message ID | 20160322153942.GA20062@char.us.oracle.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
>>> On 22.03.16 at 16:39, <konrad.wilk@oracle.com> wrote: > On Mon, Mar 21, 2016 at 06:49:03AM -0600, Jan Beulich wrote: >> >>> On 18.03.16 at 20:59, <konrad.wilk@oracle.com> wrote: >> > I know I copied and pasted it and I must have done something uncanny. >> > >> > Anyhow this is what the change looks like now (I've retained the Reviewed >> > and Ack as I think this change is mostly cosmetical in nature?) >> >> I think that's okay. >> >> > v5: Add Acks, make BUILD_BUG_ON checks look correct. Position the >> > BUGFRAME_NR properly. >> >> Almost, that is. >> >> > --- a/xen/include/asm-x86/bug.h >> > +++ b/xen/include/asm-x86/bug.h >> > @@ -10,6 +10,7 @@ >> > #define BUGFRAME_bug 2 >> > #define BUGFRAME_assert 3 >> > >> > +#define BUGFRAME_NR 4 >> > #ifndef __ASSEMBLY__ >> >> The insertion wants to go _before_ the blank line. (And in the >> ARM case you then may consider removing the preceding blank >> line too; in any event the ARM and x86 ones should look similar >> in the end.) >> > > Here it is. Last call :-) Thanks, looks fine now. Jan
diff --git a/xen/include/asm-arm/bug.h b/xen/include/asm-arm/bug.h index ab9e811..68353e1 100644 --- a/xen/include/asm-arm/bug.h +++ b/xen/include/asm-arm/bug.h @@ -32,6 +32,8 @@ struct bug_frame { #define BUGFRAME_bug 1 #define BUGFRAME_assert 2 +#define BUGFRAME_NR 3 + /* Many versions of GCC doesn't support the asm %c parameter which would * be preferable to this unpleasantness. We use mergeable string * sections to avoid multiple copies of the string appearing in the @@ -39,6 +41,7 @@ struct bug_frame { */ #define BUG_FRAME(type, line, file, has_msg, msg) do { \ BUILD_BUG_ON((line) >> 16); \ + BUILD_BUG_ON((type) >= BUGFRAME_NR); \ asm ("1:"BUG_INSTR"\n" \ ".pushsection .rodata.str, \"aMS\", %progbits, 1\n" \ "2:\t.asciz " __stringify(file) "\n" \ diff --git a/xen/include/asm-x86/bug.h b/xen/include/asm-x86/bug.h index e868e85..c5d2d4c 100644 --- a/xen/include/asm-x86/bug.h +++ b/xen/include/asm-x86/bug.h @@ -10,6 +10,8 @@ #define BUGFRAME_bug 2 #define BUGFRAME_assert 3 +#define BUGFRAME_NR 4 + #ifndef __ASSEMBLY__ struct bug_frame { @@ -51,6 +53,7 @@ struct bug_frame { #define BUG_FRAME(type, line, ptr, second_frame, msg) do { \ BUILD_BUG_ON((line) >> (BUG_LINE_LO_WIDTH + BUG_LINE_HI_WIDTH)); \ + BUILD_BUG_ON((type) >= BUGFRAME_NR); \ asm volatile ( _ASM_BUGFRAME_TEXT(second_frame) \ :: _ASM_BUGFRAME_INFO(type, line, ptr, msg) ); \ } while (0) @@ -83,6 +86,11 @@ extern const struct bug_frame __start_bug_frames[], * in .rodata */ .macro BUG_FRAME type, line, file_str, second_frame, msg + + .if \type >= BUGFRAME_NR + .error "Invalid BUGFRAME index" + .endif + .L\@ud: ud2a .pushsection .rodata.str1, "aMS", @progbits, 1