diff options
Diffstat (limited to 'toolchain/gdb/patches/790-debian_dwarf2-cfi-warning.patch')
| -rw-r--r-- | toolchain/gdb/patches/790-debian_dwarf2-cfi-warning.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/toolchain/gdb/patches/790-debian_dwarf2-cfi-warning.patch b/toolchain/gdb/patches/790-debian_dwarf2-cfi-warning.patch new file mode 100644 index 0000000000..cfb3d95de5 --- /dev/null +++ b/toolchain/gdb/patches/790-debian_dwarf2-cfi-warning.patch @@ -0,0 +1,39 @@ +Status: Unsuitable for upstream (at least, without a lot of arguing). + +GCC does not specify the state of every last register in the CIE. Since +GCC's focus is on correctness of runtime unwinding, any registers which +have to be unwound will be specified; but unmodified registers will not +be explicitly marked. (How about modified, call-clobbered registers? +I'm not sure if they are marked as unavailable.) + +GDB issues a noisy warning about this. The warning is generally not useful, +and we can get it extremely frequently (any time we load a new CIE). + +This patch disables the warning. Alternately we could set the complaints +threshold to zero, or implement a default frame init-register method for +every architecture. But someday the compiler will support using different +calling conventions for internal functions, so that's not much of a stopgap. +ARM has a complex algorithm for handling this, involving scanning all CIEs - +benefit not completely clear outside of the ARM context of flexible register +sets. + +Index: gdb-6.3/gdb/dwarf2-frame.c +=================================================================== +--- gdb-6.3.orig/gdb/dwarf2-frame.c 2004-11-15 11:54:57.000000000 -0500 ++++ gdb-6.3/gdb/dwarf2-frame.c 2004-12-08 18:02:23.896409471 -0500 +@@ -705,9 +705,12 @@ dwarf2_frame_cache (struct frame_info *n + table. We need a way of iterating through all the valid + DWARF2 register numbers. */ + if (fs->regs.reg[column].how == DWARF2_FRAME_REG_UNSPECIFIED) +- complaint (&symfile_complaints, +- "Incomplete CFI data; unspecified registers at 0x%s", +- paddr (fs->pc)); ++ { ++ if (0) ++ complaint (&symfile_complaints, ++ "Incomplete CFI data; unspecified registers at 0x%s", ++ paddr (fs->pc)); ++ } + else + cache->reg[regnum] = fs->regs.reg[column]; + } |