From 5a6312e8c015d4a98020038f3b6e144db230f3ca Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Mon, 23 Apr 2018 09:42:44 +0930 Subject: [PATCH] Silence gcc-8 warnings All of these warnings were false positives. -Wstringop-truncation is particularly annoying when it warns about strncpy used quite correctly. bfd/ * elf-linux-core.h (swap_linux_prpsinfo32_ugid32_out): Disable gcc-8 string truncation warning. (swap_linux_prpsinfo32_ugid16_out): Likewise. (swap_linux_prpsinfo64_ugid32_out): Likewise. (swap_linux_prpsinfo64_ugid16_out): Likewise. * elf.c (elfcore_write_prpsinfo): Likewise. gas/ * stabs.c (generate_asm_file): Use memcpy rather than strncpy. Remove call to strlen inside loop. * config/tc-cr16.c (getreg_image): Warning fix. * config/tc-crx.c (getreg_image): Warning fix. --- bfd/ChangeLog | 9 +++++++++ bfd/elf-linux-core.h | 16 ++++++++++++++++ bfd/elf.c | 4 ++++ gas/ChangeLog | 7 +++++++ gas/config/tc-cr16.c | 5 +++-- gas/config/tc-crx.c | 7 +++++-- gas/stabs.c | 4 ++-- 7 files changed, 46 insertions(+), 6 deletions(-) diff --git a/bfd/ChangeLog b/bfd/ChangeLog index fa26810c198..7cc35f36e58 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,12 @@ +2018-04-23 Alan Modra + + * elf-linux-core.h (swap_linux_prpsinfo32_ugid32_out): Disable + gcc-8 string truncation warning. + (swap_linux_prpsinfo32_ugid16_out): Likewise. + (swap_linux_prpsinfo64_ugid32_out): Likewise. + (swap_linux_prpsinfo64_ugid16_out): Likewise. + * elf.c (elfcore_write_prpsinfo): Likewise. + 2018-04-20 Alan Modra PR 22978 diff --git a/bfd/elf-linux-core.h b/bfd/elf-linux-core.h index 0a5d76fe9df..25d33f62cc6 100644 --- a/bfd/elf-linux-core.h +++ b/bfd/elf-linux-core.h @@ -69,8 +69,12 @@ swap_linux_prpsinfo32_ugid32_out bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); bfd_put_32 (obfd, from->pr_sid, to->pr_sid); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpragmas" +#pragma GCC diagnostic ignored "-Wstringop-truncation" strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); +#pragma GCC diagnostic pop } /* External 32-bit structure for PRPSINFO. This structure is @@ -121,8 +125,12 @@ swap_linux_prpsinfo32_ugid16_out bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); bfd_put_32 (obfd, from->pr_sid, to->pr_sid); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpragmas" +#pragma GCC diagnostic ignored "-Wstringop-truncation" strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); +#pragma GCC diagnostic pop } /* External 64-bit structure for PRPSINFO. This structure is @@ -174,8 +182,12 @@ swap_linux_prpsinfo64_ugid32_out bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); bfd_put_32 (obfd, from->pr_sid, to->pr_sid); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpragmas" +#pragma GCC diagnostic ignored "-Wstringop-truncation" strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); +#pragma GCC diagnostic pop } /* External 64-bit structure for PRPSINFO. This structure is @@ -227,8 +239,12 @@ swap_linux_prpsinfo64_ugid16_out bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); bfd_put_32 (obfd, from->pr_sid, to->pr_sid); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpragmas" +#pragma GCC diagnostic ignored "-Wstringop-truncation" strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); +#pragma GCC diagnostic pop } #endif diff --git a/bfd/elf.c b/bfd/elf.c index 8ea5a81cbe3..b4549ea7173 100644 --- a/bfd/elf.c +++ b/bfd/elf.c @@ -10549,8 +10549,12 @@ elfcore_write_prpsinfo (bfd *abfd, #endif memset (&data, 0, sizeof (data)); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpragmas" +#pragma GCC diagnostic ignored "-Wstringop-truncation" strncpy (data.pr_fname, fname, sizeof (data.pr_fname)); strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs)); +#pragma GCC diagnostic pop return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, &data, sizeof (data)); } diff --git a/gas/ChangeLog b/gas/ChangeLog index 21d09f8e2c6..ba3d8b5d031 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,10 @@ +2018-04-23 Alan Modra + + * stabs.c (generate_asm_file): Use memcpy rather than strncpy. + Remove call to strlen inside loop. + * config/tc-cr16.c (getreg_image): Warning fix. + * config/tc-crx.c (getreg_image): Warning fix. + 2018-04-20 Kito Cheng * config/tc-riscv.c (options): Add OPTION_RELAX and diff --git a/gas/config/tc-cr16.c b/gas/config/tc-cr16.c index 0b73003c4e0..d25afccb1bc 100644 --- a/gas/config/tc-cr16.c +++ b/gas/config/tc-cr16.c @@ -1124,8 +1124,7 @@ getreg_image (reg r) /* Issue a error message when register is illegal. */ #define IMAGE_ERR \ as_bad (_("Illegal register (`%s') in Instruction: `%s'"), \ - reg_name, ins_parse); \ - break; + reg_name, ins_parse); switch (rreg->type) { @@ -1134,6 +1133,7 @@ getreg_image (reg r) return rreg->image; else IMAGE_ERR; + break; case CR16_P_REGTYPE: return rreg->image; @@ -1141,6 +1141,7 @@ getreg_image (reg r) default: IMAGE_ERR; + break; } return 0; diff --git a/gas/config/tc-crx.c b/gas/config/tc-crx.c index ce8cbcece26..8cf4af44b6a 100644 --- a/gas/config/tc-crx.c +++ b/gas/config/tc-crx.c @@ -1135,8 +1135,7 @@ getreg_image (reg r) /* Issue a error message when register is illegal. */ #define IMAGE_ERR \ as_bad (_("Illegal register (`%s') in instruction: `%s'"), \ - reg_name, ins_parse); \ - break; + reg_name, ins_parse); switch (rreg->type) { @@ -1145,18 +1144,21 @@ getreg_image (reg r) return rreg->image; else IMAGE_ERR; + break; case CRX_CFG_REGTYPE: if (is_procreg) return rreg->image; else IMAGE_ERR; + break; case CRX_R_REGTYPE: if (! is_procreg) return rreg->image; else IMAGE_ERR; + break; case CRX_C_REGTYPE: case CRX_CS_REGTYPE: @@ -1165,6 +1167,7 @@ getreg_image (reg r) default: IMAGE_ERR; + break; } return 0; diff --git a/gas/stabs.c b/gas/stabs.c index d82de315433..6ddbdada15c 100644 --- a/gas/stabs.c +++ b/gas/stabs.c @@ -543,12 +543,12 @@ generate_asm_file (int type, const char *file) while (tmp < file_endp) { const char *bslash = strchr (tmp, '\\'); - size_t len = (bslash) ? (size_t) (bslash - tmp + 1) : strlen (tmp); + size_t len = bslash != NULL ? bslash - tmp + 1 : file_endp - tmp; /* Double all backslashes, since demand_copy_C_string (used by s_stab to extract the part in quotes) will try to replace them as escape sequences. backslash may appear in a filespec. */ - strncpy (bufp, tmp, len); + memcpy (bufp, tmp, len); tmp += len; bufp += len; -- 2.30.2