* Dave Johnson <djohnson+linuxmips@xxxxxxxxxxxxxxxxxxxxxx> [2005-08-22 17:08]: > I've been trying to fix core file support for 64bit kernel with o32 > userspace (working against 2.6.12 cvs tag). > > After applying the patch posted on 13 Feb 2005 from Daniel Jacobowitz > to fix binfmt_elfo32.c (any reason this didn't make it into CVS?), > I still ran into trouble with gdb not understanding the NT_PRSTATUS > header in the core file. > > While Dan's fix makes the kernel use elf32 definitions, gdb was still > getting confused by pr_reg contained in the core file. > > Dan's definition of ELF_CORE_COPY_REGS in binfmt_elfo32.c is copying > the registers using EF_R0 as 0 not 6 producing results into offset 0 > through 37 not 6 through 43 as gdb expects for 32bit core files. > > Below patch (applied after Dan's patch) writes the registers at offset > 6 making gdb much happier. * Daniel Jacobowitz <dan@xxxxxxxxxx> [2005-08-28 11:45]: > > Below patch (applied after Dan's patch) writes the registers at offset > > 6 making gdb much happier. > > FYI, this has all been rearranged since - it did this correctly at the > time. I don't know why the patch was dropped. Can this be applied? > Fix o32 core files under 64bit kernel to use correct register > offset in NT_PRSTATUS > > Signed-off-by: Dave Johnson <djohnson+linuxmips@xxxxxxxxxxxxxxxxxxxxxx> > > ===== arch/mips/kernel/binfmt_elfo32.c 1.7 vs edited ===== > --- 1.7/arch/mips/kernel/binfmt_elfo32.c 2005-08-20 12:30:12 -04:00 > +++ edited/arch/mips/kernel/binfmt_elfo32.c 2005-08-22 16:09:59 -04:00 > @@ -51,6 +51,7 @@ > #define TASK32_SIZE 0x7fff8000UL > #undef ELF_ET_DYN_BASE > #define ELF_ET_DYN_BASE (TASK32_SIZE / 3 * 2) > +#define WANT_COMPAT_REG_H > > #include <asm/processor.h> > #include <linux/module.h> > ===== include/asm-mips/reg.h 1.1 vs edited ===== > --- 1.1/include/asm-mips/reg.h 2005-02-02 11:39:14 -05:00 > +++ edited/include/asm-mips/reg.h 2005-08-22 15:55:04 -04:00 > @@ -70,7 +70,7 @@ > > #endif > > -#if CONFIG_MIPS64 > +#if defined(CONFIG_MIPS64) && !defined(WANT_COMPAT_REG_H) > > #define EF_R0 0 > #define EF_R1 1 > -- Martin Michlmayr http://www.cyrius.com/
