From: Mark Salter <msalter@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, Aurelien Jacquiot <a-jacquiot@ti.com>,
Mark Salter <msalter@redhat.com>, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH v4 17/24] C6X: loadable module support
Date: Tue, 4 Oct 2011 12:43:54 -0400 [thread overview]
Message-ID: <1317746641-26725-18-git-send-email-msalter@redhat.com> (raw)
In-Reply-To: <1317746641-26725-1-git-send-email-msalter@redhat.com>
From: Aurelien Jacquiot <a-jacquiot@ti.com>
Original port to early 2.6 kernel using TI COFF toolchain.
Brought up to date by Mark Salter <msalter@redhat.com>
Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
CC: Arnd Bergmann <arnd@arndb.de>
---
arch/c6x/include/asm/module.h | 33 +++++++++++
arch/c6x/kernel/c6x_ksyms.c | 66 ++++++++++++++++++++++
arch/c6x/kernel/module.c | 123 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 222 insertions(+), 0 deletions(-)
create mode 100644 arch/c6x/include/asm/module.h
create mode 100644 arch/c6x/kernel/c6x_ksyms.c
create mode 100644 arch/c6x/kernel/module.c
diff --git a/arch/c6x/include/asm/module.h b/arch/c6x/include/asm/module.h
new file mode 100644
index 0000000..a453f97
--- /dev/null
+++ b/arch/c6x/include/asm/module.h
@@ -0,0 +1,33 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34 by: Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_MODULE_H
+#define _ASM_C6X_MODULE_H
+
+#define Elf_Shdr Elf32_Shdr
+#define Elf_Sym Elf32_Sym
+#define Elf_Ehdr Elf32_Ehdr
+#define Elf_Addr Elf32_Addr
+#define Elf_Word Elf32_Word
+
+/*
+ * This file contains the C6x architecture specific module code.
+ */
+struct mod_arch_specific {
+};
+
+struct loaded_sections {
+ unsigned int new_vaddr;
+ unsigned int loaded;
+};
+
+#endif /* _ASM_C6X_MODULE_H */
diff --git a/arch/c6x/kernel/c6x_ksyms.c b/arch/c6x/kernel/c6x_ksyms.c
new file mode 100644
index 0000000..0ba3e0b
--- /dev/null
+++ b/arch/c6x/kernel/c6x_ksyms.c
@@ -0,0 +1,66 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <asm/checksum.h>
+#include <linux/io.h>
+
+/*
+ * libgcc functions - used internally by the compiler...
+ */
+extern int __c6xabi_divi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divi);
+
+extern unsigned __c6xabi_divu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divu);
+
+extern int __c6xabi_remi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_remi);
+
+extern unsigned __c6xabi_remu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_remu);
+
+extern int __c6xabi_divremi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divremi);
+
+extern unsigned __c6xabi_divremu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divremu);
+
+extern unsigned long long __c6xabi_mpyll(unsigned long long src1,
+ unsigned long long src2);
+EXPORT_SYMBOL(__c6xabi_mpyll);
+
+extern long long __c6xabi_negll(long long src);
+EXPORT_SYMBOL(__c6xabi_negll);
+
+extern unsigned long long __c6xabi_llshl(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshl);
+
+extern long long __c6xabi_llshr(long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshr);
+
+extern unsigned long long __c6xabi_llshru(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshru);
+
+extern void __c6xabi_strasgi(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi);
+
+extern void __c6xabi_push_rts(void);
+EXPORT_SYMBOL(__c6xabi_push_rts);
+
+extern void __c6xabi_pop_rts(void);
+EXPORT_SYMBOL(__c6xabi_pop_rts);
+
+extern void __c6xabi_strasgi_64plus(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi_64plus);
+
+/* lib functions */
+EXPORT_SYMBOL(memcpy);
diff --git a/arch/c6x/kernel/module.c b/arch/c6x/kernel/module.c
new file mode 100644
index 0000000..5fc03f1
--- /dev/null
+++ b/arch/c6x/kernel/module.c
@@ -0,0 +1,123 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2005, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Thomas Charleux (thomas.charleux@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/kernel.h>
+
+static inline int fixup_pcr(u32 *ip, Elf32_Addr dest, u32 maskbits, int shift)
+{
+ u32 opcode;
+ long ep = (long)ip & ~31;
+ long delta = ((long)dest - ep) >> 2;
+ long mask = (1 << maskbits) - 1;
+
+ if ((delta >> (maskbits - 1)) == 0 ||
+ (delta >> (maskbits - 1)) == -1) {
+ opcode = *ip;
+ opcode &= ~(mask << shift);
+ opcode |= ((delta & mask) << shift);
+ *ip = opcode;
+
+ pr_debug("REL PCR_S%d[%p] dest[%p] opcode[%08x]\n",
+ maskbits, ip, (void *)dest, opcode);
+
+ return 0;
+ }
+ pr_err("PCR_S%d reloc %p -> %p out of range!\n",
+ maskbits, ip, (void *)dest);
+
+ return -1;
+}
+
+/*
+ * apply a RELA relocation
+ */
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
+ Elf_Sym *sym;
+ u32 *location, opcode;
+ unsigned int i;
+ Elf32_Addr v;
+ Elf_Addr offset = 0;
+
+ pr_debug("Applying relocate section %u to %u with offset 0x%x\n",
+ relsec, sechdrs[relsec].sh_info, offset);
+
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset - offset;
+
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rel[i].r_info);
+
+ /* this is the adjustment to be made */
+ v = sym->st_value + rel[i].r_addend;
+
+ switch (ELF32_R_TYPE(rel[i].r_info)) {
+ case R_C6000_ABS32:
+ pr_debug("RELA ABS32: [%p] = 0x%x\n", location, v);
+ *location = v;
+ break;
+ case R_C6000_ABS16:
+ pr_debug("RELA ABS16: [%p] = 0x%x\n", location, v);
+ *(u16 *)location = v;
+ break;
+ case R_C6000_ABS8:
+ pr_debug("RELA ABS8: [%p] = 0x%x\n", location, v);
+ *(u8 *)location = v;
+ break;
+ case R_C6000_ABS_L16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v & 0xffff) << 7);
+ pr_debug("RELA ABS_L16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_ABS_H16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v >> 9) & 0x7fff80);
+ pr_debug("RELA ABS_H16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_PCR_S21:
+ if (fixup_pcr(location, v, 21, 7))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S12:
+ if (fixup_pcr(location, v, 12, 16))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S10:
+ if (fixup_pcr(location, v, 10, 13))
+ return -ENOEXEC;
+ break;
+ default:
+ pr_err("module %s: Unknown RELA relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
--
1.7.6.2
next prev parent reply other threads:[~2011-10-04 16:47 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-04 16:43 [PATCH v4 00/24] C6X: New architecture Mark Salter
2011-10-04 16:43 ` [PATCH v4 01/24] fix default __strnlen_user macro Mark Salter
2011-10-04 16:43 ` [PATCH v4 02/24] fixed generic page.h for non-zero PAGE_OFFSET Mark Salter
2011-10-04 16:43 ` [PATCH v4 03/24] add ELF machine define for TI C6X DSPs Mark Salter
2011-10-04 16:43 ` [PATCH v4 04/24] add missing __iomem to generic iounmap declaration Mark Salter
2011-10-04 16:43 ` [PATCH v4 05/24] C6X: build infrastructure Mark Salter
2011-10-04 19:11 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 06/24] C6X: early boot code Mark Salter
2011-10-04 19:11 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 07/24] C6X: devicetree support Mark Salter
2011-10-04 19:24 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 08/24] C6X: memory management and DMA support Mark Salter
2011-10-04 19:10 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 09/24] C6X: process management Mark Salter
2011-10-04 16:43 ` [PATCH v4 10/24] C6X: signal management Mark Salter
2011-10-04 16:43 ` [PATCH v4 11/24] C6X: time management Mark Salter
2011-10-04 18:04 ` Thomas Gleixner
2011-10-04 19:13 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 12/24] C6X: interrupt handling Mark Salter
2011-10-04 18:06 ` Thomas Gleixner
2011-10-04 19:12 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 13/24] C6X: syscalls Mark Salter
2011-10-04 16:43 ` [PATCH v4 14/24] C6X: build infrastructure Mark Salter
2011-10-04 16:43 ` [PATCH v4 15/24] C6X: clocks Mark Salter
2011-10-04 16:43 ` [PATCH v4 16/24] C6X: cache control Mark Salter
2011-10-04 16:43 ` Mark Salter [this message]
2011-10-04 19:08 ` [PATCH v4 17/24] C6X: loadable module support Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 18/24] C6X: ptrace support Mark Salter
2011-10-04 19:07 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 19/24] C6X: headers Mark Salter
2011-10-04 18:06 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 20/24] C6X: library code Mark Salter
2011-10-04 18:04 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 21/24] C6X: general SoC support Mark Salter
2011-10-04 19:23 ` Arnd Bergmann
2011-10-04 16:43 ` [PATCH v4 22/24] C6X: EMIF - External Memory Interface Mark Salter
2011-10-04 16:44 ` [PATCH v4 23/24] C6X: DSCR - Device State Configuration Registers Mark Salter
2011-10-04 16:44 ` [PATCH v4 24/24] C6X: MAINTAINERS Mark Salter
2011-10-04 19:27 ` [PATCH v4 00/24] C6X: New architecture Arnd Bergmann
2011-10-05 12:52 ` Mark Salter
2011-10-05 16:16 ` Arnd Bergmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1317746641-26725-18-git-send-email-msalter@redhat.com \
--to=msalter@redhat.com \
--cc=a-jacquiot@ti.com \
--cc=arnd@arndb.de \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome