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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Keith Seitz <keiths@redhat.com>
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Date: Fri, 11 Jan 2019 17:02:13 -0500
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Subject: gdb-rhbz1187581-power8-regs-not-in-8.2-04of15.patch
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;; [PowerPC] Don't zero-initialize vector register buffers
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;; Pedro Franco de Carvalho, RH BZ 1187581
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[PowerPC] Don't zero-initialize vector register buffers
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Now that linux-tdep.c already zero-initializes the buffer used for
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generating core file notes, there is no need to do this in the linux
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collect functions for the vector regset. The memsets in gdbserver were
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not useful to begin with.
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gdb/ChangeLog:
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2018-10-26 Pedro Franco de Carvalho <pedromfc@linux.ibm.com>
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* ppc-linux-tdep.c (ppc_linux_collect_vrregset): Remove.
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(ppc32_le_linux_vrregset, ppc32_be_linux_vrregset): Replace
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ppc_linux_collect_vrregset by regcache_collect_regset.
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gdb/gdbserver/ChangeLog:
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2018-10-26 Pedro Franco de Carvalho <pedromfc@linux.ibm.com>
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* linux-ppc-low.c (ppc_fill_vrregset): Remove memset calls.
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diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c
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--- a/gdb/gdbserver/linux-ppc-low.c
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+++ b/gdb/gdbserver/linux-ppc-low.c
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@@ -495,13 +495,9 @@ ppc_fill_vrregset (struct regcache *regcache, void *buf)
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if (__BYTE_ORDER == __BIG_ENDIAN)
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vscr_offset = 12;
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- /* Zero-pad the unused bytes in the fields for vscr and vrsave in
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- case they get displayed somewhere. */
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- memset (®set[32 * 16], 0, 16);
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collect_register_by_name (regcache, "vscr",
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®set[32 * 16 + vscr_offset]);
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- memset (®set[33 * 16], 0, 16);
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collect_register_by_name (regcache, "vrsave", ®set[33 * 16]);
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}
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diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
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--- a/gdb/ppc-linux-tdep.c
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+++ b/gdb/ppc-linux-tdep.c
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@@ -444,24 +444,6 @@ ppc_linux_collect_gregset (const struct regset *regset,
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}
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}
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-static void
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-ppc_linux_collect_vrregset (const struct regset *regset,
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- const struct regcache *regcache,
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- int regnum, void *buf, size_t len)
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-{
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- gdb_byte *vrregs = (gdb_byte *) buf;
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-
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- /* Zero-pad the unused bytes in the fields for vscr and vrsave
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- in case they get displayed somewhere (e.g. in core files). */
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- if (regnum == PPC_VSCR_REGNUM || regnum == -1)
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- memset (&vrregs[32 * 16], 0, 16);
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-
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- if (regnum == PPC_VRSAVE_REGNUM || regnum == -1)
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- memset (&vrregs[33 * 16], 0, 16);
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-
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- regcache_collect_regset (regset, regcache, regnum, buf, len);
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-}
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-
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/* Regset descriptions. */
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static const struct ppc_reg_offsets ppc32_linux_reg_offsets =
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{
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@@ -544,13 +526,13 @@ static const struct regcache_map_entry ppc32_be_linux_vrregmap[] =
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static const struct regset ppc32_le_linux_vrregset = {
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ppc32_le_linux_vrregmap,
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regcache_supply_regset,
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- ppc_linux_collect_vrregset
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+ regcache_collect_regset
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};
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static const struct regset ppc32_be_linux_vrregset = {
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ppc32_be_linux_vrregmap,
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regcache_supply_regset,
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- ppc_linux_collect_vrregset
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+ regcache_collect_regset
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};
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static const struct regcache_map_entry ppc32_linux_vsxregmap[] =
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