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sh: unwinder: Set the flags for DW_CFA_val_offset ops as DWARF_VAL_OFFSET

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The handling of DW_CFA_val_offset ops was incorrectly using the
DWARF_REG_OFFSET flag but the register's value cannot be calculated
using the DWARF_REG_OFFSET method. Create a new flag to indicate that a
different method must be used to calculate the register's value even
though there is no implementation for DWARF_VAL_OFFSET yet; it's mainly
just a place holder.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
This commit is contained in:
Matt Fleming 2009-08-16 15:56:35 +01:00
parent fb3f3e7fc6
commit 97efbbd588
2 changed files with 3 additions and 1 deletions
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1
arch/sh/include/asm/dwarf.h
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@ -296,6 +296,7 @@ struct dwarf_reg {
unsigned long addr;
unsigned long flags;
#define DWARF_REG_OFFSET (1 << 0)
#define DWARF_VAL_OFFSET (1 << 1)
};
/*

3
arch/sh/kernel/dwarf.c
View File

@ -11,6 +11,7 @@
*
* TODO:
* - DWARF64 doesn't work.
* - Registers with DWARF_VAL_OFFSET rules aren't handled properly.
*/
/* #define DEBUG */
@ -499,7 +500,7 @@ static int dwarf_cfa_execute_insns(unsigned char *insn_start,
count = dwarf_read_leb128(current_insn, &offset);
offset *= cie->data_alignment_factor;
regp = dwarf_frame_alloc_reg(frame, reg);
regp->flags |= DWARF_REG_OFFSET;
regp->flags |= DWARF_VAL_OFFSET;
regp->addr = offset;
break;
case DW_CFA_GNU_args_size: