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Message-ID: <20170914080302.GF599@jagdpanzerIV.localdomain> Date: Thu, 14 Sep 2017 17:03:02 +0900 From: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> To: Helge Deller <deller@....de> Cc: "Luck, Tony" <tony.luck@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Sergey Senozhatsky <sergey.senozhatsky@...il.com>, Petr Mladek <pmladek@...e.com>, Andrew Morton <akpm@...ux-foundation.org>, "Yu, Fenghua" <fenghua.yu@...el.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Michael Ellerman <mpe@...erman.id.au>, Sergey Senozhatsky <sergey.senozhatsky.work@...il.com> Subject: Re: [PATCH 00/14] Fix wrong %pF and %pS printk format specifier usages On (09/14/17 16:40), Sergey Senozhatsky wrote: [..] > powerpc and parisc handle kernel .opd section as well: > > arch/powerpc/kernel/vmlinux.lds.S: .opd > arch/parisc/kernel/vmlinux.lds.S: .opd for modules, arch-s define mod_arch_specific struct. parisc has .opd (fdesc offset should be the start of .opd, fdesc_offset + sizeof(fdesc) * fdesc_count should be the .opd address range) struct mod_arch_specific { unsigned long got_offset, got_count, got_max; unsigned long fdesc_offset, fdesc_count, fdesc_max; struct { unsigned long stub_offset; unsigned int stub_entries; } *section; int unwind_section; struct unwind_table *unwind; }; ia64 has .opd struct mod_arch_specific { struct elf64_shdr *core_plt; /* core PLT section */ struct elf64_shdr *init_plt; /* init PLT section */ struct elf64_shdr *got; /* global offset table */ struct elf64_shdr *opd; /* official procedure descriptors */ struct elf64_shdr *unwind; /* unwind-table section */ unsigned long gp; /* global-pointer for module */ void *core_unw_table; /* core unwind-table cookie returned by unwinder */ void *init_unw_table; /* init unwind-table cookie returned by unwinder */ unsigned int next_got_entry; /* index of next available got entry */ }; powerpc does not keep track of .opd, need to add struct mod_arch_specific { #ifdef __powerpc64__ unsigned int stubs_section; /* Index of stubs section in module */ unsigned int toc_section; /* What section is the TOC? */ bool toc_fixed; /* Have we fixed up .TOC.? */ #ifdef CONFIG_DYNAMIC_FTRACE unsigned long toc; unsigned long tramp; #endif #else /* powerpc64 */ /* Indices of PLT sections within module. */ unsigned int core_plt_section; unsigned int init_plt_section; #ifdef CONFIG_DYNAMIC_FTRACE unsigned long tramp; #endif #endif /* powerpc64 */ /* List of BUG addresses, source line numbers and filenames */ struct list_head bug_list; struct bug_entry *bug_table; unsigned int num_bugs; }; seems like we are looking at a solution here. thoughts? -ss
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