* [PATCH 0/2] powerpc: Add to linker script discards
@ 2018-12-03 23:55 Joel Stanley
2018-12-03 23:55 ` [PATCH 1/2] powerpc: Discard more sections in linker script Joel Stanley
2018-12-03 23:55 ` [PATCH 2/2] powerpc: Discard dynsym section for !PPC32 Joel Stanley
0 siblings, 2 replies; 3+ messages in thread
From: Joel Stanley @ 2018-12-03 23:55 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Alan Modra
Joel Stanley (2):
powerpc: Discard more sections in linker script
powerpc: Discard dynsym section for !PPC32
arch/powerpc/kernel/vmlinux.lds.S | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
--
2.19.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 1/2] powerpc: Discard more sections in linker script
2018-12-03 23:55 [PATCH 0/2] powerpc: Add to linker script discards Joel Stanley
@ 2018-12-03 23:55 ` Joel Stanley
2018-12-03 23:55 ` [PATCH 2/2] powerpc: Discard dynsym section for !PPC32 Joel Stanley
1 sibling, 0 replies; 3+ messages in thread
From: Joel Stanley @ 2018-12-03 23:55 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Alan Modra
Building the ppc64 kernel with a modern binutils results in this
warning:
powerpc64le-linux-gnu-ld: warning: orphan section `.gnu.hash' from
`linker stubs' being placed in section `.gnu.hash'
Alan Modra <amodra@gmail.com> explains:
> .gnu.hash, like .hash, is used by glibc ld.so for dynamic symbol
> lookup. I imagine you don't need either section in a kernel, so
> discarding both sounds reasonable. Likely you could discard .interp
> and .dynstr too, and .dynsym when !CONFIG_PPC32.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
See https://lore.kernel.org/lkml/CACPK8Xft3n5KkpTjN3=7_VUCXHFcK7mxvZm2Rrqu7tppcBoyOg@mail.gmail.com/T/#m58532c86cf0c7b4fb01cc1fe724e48d4c7d8e4a7
arch/powerpc/kernel/vmlinux.lds.S | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 5c5d559a23fd..e14cde32b003 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -279,8 +279,6 @@ SECTIONS
__dynamic_start = .;
*(.dynamic)
}
- .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
- .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
{
__rela_dyn_start = .;
@@ -389,5 +387,8 @@ SECTIONS
*(.gnu.version*)
*(.gnu.attributes)
*(.eh_frame)
+ *(.hash .gnu.hash)
+ *(.interp)
+ *(.dynstr)
}
}
--
2.19.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 2/2] powerpc: Discard dynsym section for !PPC32
2018-12-03 23:55 [PATCH 0/2] powerpc: Add to linker script discards Joel Stanley
2018-12-03 23:55 ` [PATCH 1/2] powerpc: Discard more sections in linker script Joel Stanley
@ 2018-12-03 23:55 ` Joel Stanley
1 sibling, 0 replies; 3+ messages in thread
From: Joel Stanley @ 2018-12-03 23:55 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Alan Modra
Alan Modra <amodra@gmail.com> explains:
> Likely you could discard .interp > and .dynstr too, and .dynsym when
> !CONFIG_PPC32.
Discarding of interp and dynstr happened in a previous patch. The dynsym
cleanup was a bit less straightforward, so it gets it's own patch.
Signed-off-by: Joel Stanley <joel@jms.id.au>
---
See https://lore.kernel.org/lkml/CACPK8Xft3n5KkpTjN3=7_VUCXHFcK7mxvZm2Rrqu7tppcBoyOg@mail.gmail.com/T/#m58532c86cf0c7b4fb01cc1fe724e48d4c7d8e4a7
arch/powerpc/kernel/vmlinux.lds.S | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index e14cde32b003..49dd678a2de4 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -266,14 +266,13 @@ SECTIONS
}
#ifdef CONFIG_RELOCATABLE
. = ALIGN(8);
+#ifdef CONFIG_PPC32
.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
{
-#ifdef CONFIG_PPC32
__dynamic_symtab = .;
-#endif
*(.dynsym)
}
- .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
+#endif
.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
{
__dynamic_start = .;
@@ -390,5 +389,8 @@ SECTIONS
*(.hash .gnu.hash)
*(.interp)
*(.dynstr)
+#ifndef CONFIG_PPC32
+ *(.dynsym)
+#endif
}
}
--
2.19.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2018-12-04 0:03 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-12-03 23:55 [PATCH 0/2] powerpc: Add to linker script discards Joel Stanley
2018-12-03 23:55 ` [PATCH 1/2] powerpc: Discard more sections in linker script Joel Stanley
2018-12-03 23:55 ` [PATCH 2/2] powerpc: Discard dynsym section for !PPC32 Joel Stanley
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).