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authorAndrew Burgess <andrew.burgess@embecosm.com>2019-11-04 23:03:10 +0000
committerAndrew Burgess <andrew.burgess@embecosm.com>2019-11-28 00:03:05 +0000
commit0ac2b354ee006d94d6fc46bea08f39f99b18f869 (patch)
treee835558df4225cb8542515eb3ab5a65eaeef924b /install-sh
parent22eb4a06176dfef554008a62844e0ce30df2260f (diff)
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gas/riscv: Produce version 3 DWARF CIE by default
The flag controlling the default DWARF CIE version to produce now starts with the value -1. This can be modified with the command line flag as before, but after command line flag processing, in md_after_parse_args targets can, if the global still has the value -1, override this value. This gives a target specific default. If a CIE version is not select either by command line flag, or a target specific default, then some new code in dwarf2_init now select a global default. This remains as version 1 to match previous behaviour. This RISC-V has a target specific default of version provided, this make the return column uleb128, which means we can use all DWARF registers include CSRs. I chose to switch to version 3 rather than version 4 as this is most similar to the global default (version 1). Switching to version 4 adds additional columns to the CIE header. gas/ChangeLog: * as.c (flag_dwarf_cie_version): Change initial value to -1, and update comment. * config/tc-riscv.c (riscv_after_parse_args): Set flag_dwarf_cie_version if it has not already been set. * dwarf2dbg.c (dwarf2_init): Initialise flag_dwarf_cie_version if needed. * testsuite/gas/riscv/default-cie-version.d: New file. * testsuite/gas/riscv/default-cie-version.s: New file. ld/ChangeLog: * testsuite/ld-elf/eh5.d: Accept version 3 DWARF CIE. Change-Id: Ibbfe8f0979fba480bf0a359978b09d2b3055555e
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