Re: [PATCH 6/6] reliable stack trace support (i386 entry.Sannotations)

[Jan Beulich]

Sure - it doesn't use the assembler's .cfi_* directives, but encodes things manually. I'll still have to check why
you're getting these errors, as you should see entirely different ones if the assembler didn't support the directives at
all. Jan

>>> Andrew Morton <akpm@xxxxxxxx> 25.05.06 07:41 >>>
Andrew Morton <akpm@xxxxxxxx> wrote:
>
> "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>  >
>  >  #define SAVE_ALL \
>  >   	cld; \
>  >   	pushl %es; \
>  >  +	CFI_ADJUST_CFA_OFFSET 4;\
>  >  +	/*CFI_REL_OFFSET es, 0;*/\
>  >   	pushl %ds; \
> 
>  arch/i386/kernel/entry.S: Assembler messages:
>  arch/i386/kernel/entry.S:757: Error: CFI instruction used without previous .cfi_startproc
>  arch/i386/kernel/entry.S:757: Warning: rest of line ignored; first ignored character is `4'
>  arch/i386/kernel/entry.S:757: Error: CFI instruction used without previous .cfi_startproc
>  arch/i386/kernel/entry.S:757: Warning: rest of line ignored; first ignored character is `4'
>  arch/i386/kernel/entry.S:757: Error: CFI instruction used without previous .cfi_startproc
>  arch/i386/kernel/entry.S:757: Warning: rest of line ignored; first ignored character is `4'
>  arch/i386/kernel/entry.S:757: Error: CFI instruction used without previous .cfi_startproc
> 
>  etcetera.  And
> 
>  arch/i386/kernel/entry.S:757: Error: no such instruction: `eax,0'
>  arch/i386/kernel/entry.S:757: Error: no such instruction: `ebp,0'
> 

btw, this cfi annotation code:

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc4/2.6.17-rc4-mm3/broken-out/kgdb-cfi_annotations.patch


compiles happily with that toolchain.

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