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Commit 97efbbd5 authored by Matt Fleming's avatar Matt Fleming
Browse files

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



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: default avatarMatt Fleming <matt@console-pimps.org>
parent fb3f3e7f

arch/sh/include/asm/dwarf.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -296,6 +296,7 @@ struct dwarf_reg { 
	unsigned long addr;

	unsigned long addr;

	unsigned long flags;

	unsigned long flags;

#define DWARF_REG_OFFSET	(1 << 0)

#define DWARF_REG_OFFSET	(1 << 0)

#define DWARF_VAL_OFFSET	(1 << 1)

};

};





/*

/*

arch/sh/kernel/dwarf.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -11,6 +11,7 @@ 
 *

 *

 * TODO:

 * TODO:

 *	- DWARF64 doesn't work.

 *	- DWARF64 doesn't work.

 *	- Registers with DWARF_VAL_OFFSET rules aren't handled properly.

 */

 */





/* #define DEBUG */

/* #define DEBUG */
@@ -499,7 +500,7 @@ static int dwarf_cfa_execute_insns(unsigned char *insn_start, 
			count = dwarf_read_leb128(current_insn, &offset);

			count = dwarf_read_leb128(current_insn, &offset);

			offset *= cie->data_alignment_factor;

			offset *= cie->data_alignment_factor;

			regp = dwarf_frame_alloc_reg(frame, reg);

			regp = dwarf_frame_alloc_reg(frame, reg);

			regp->flags |= DWARF_REG_OFFSET;

			regp->flags |= DWARF_VAL_OFFSET;

			regp->addr = offset;

			regp->addr = offset;

			break;

			break;

		case DW_CFA_GNU_args_size:

		case DW_CFA_GNU_args_size: