From: Simon Marchi <simon.marchi@polymtl.ca>
To: Andreas Schwab <schwab@suse.de>, gdb-patches@sourceware.org
Subject: Re: [PATCH] gdb: Support DW_LLE_start_end
Date: Mon, 21 Jun 2021 13:02:05 -0400 [thread overview]
Message-ID: <8febd971-d782-51dc-909f-1e0c862d3773@polymtl.ca> (raw)
In-Reply-To: <mvmpmwfeed0.fsf@suse.de>
On 2021-06-21 5:50 a.m., Andreas Schwab wrote:
> Without that it is impossible to debug on riscv64.
>
> gdb/
> PR symtab/27999
> * dwarf2/loc.c (decode_debug_loclists_addresses): Support
> DW_LLE_start_end.
> ---
> gdb/dwarf2/loc.c | 20 +++++++++++++++++++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/gdb/dwarf2/loc.c b/gdb/dwarf2/loc.c
> index b7e30e3cb4a..d57cdc165ba 100644
> --- a/gdb/dwarf2/loc.c
> +++ b/gdb/dwarf2/loc.c
> @@ -255,9 +255,27 @@ decode_debug_loclists_addresses (dwarf2_per_cu_data *per_cu,
> *new_ptr = loc_ptr;
> return DEBUG_LOC_OFFSET_PAIR;
>
> + case DW_LLE_start_end:
> + if (loc_ptr + 2 * addr_size > buf_end)
> + return DEBUG_LOC_BUFFER_OVERFLOW;
> +
> + if (signed_addr_p)
> + *low = extract_signed_integer (loc_ptr, addr_size, byte_order);
> + else
> + *low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
> +
> + loc_ptr += addr_size;
> + if (signed_addr_p)
> + *high = extract_signed_integer (loc_ptr, addr_size, byte_order);
> + else
> + *high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
> +
> + loc_ptr += addr_size;
> + *new_ptr = loc_ptr;
> + return DEBUG_LOC_START_END;
> +
> /* Following cases are not supported yet. */
> case DW_LLE_startx_endx:
> - case DW_LLE_start_end:
> case DW_LLE_default_location:
> default:
> return DEBUG_LOC_INVALID_ENTRY;
>
Could you please try adding a gdb.dwarf2 test case? Support for
building loclists already exists, so there should be little new
infrastructure needed, just add support for DW_LLE_start_end (see where
DW_LLE_start_length is handled).
I'm thinking of a test case where we would test all the DW_LLE_*
operations we support.
Simon
next prev parent reply other threads:[~2021-06-21 17:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-21 9:50 Andreas Schwab
2021-06-21 17:02 ` Simon Marchi [this message]
2021-06-22 12:24 ` Andreas Schwab
2021-06-22 13:36 ` Simon Marchi
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