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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm/elf.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-arm/elf.h')
-rw-r--r--include/asm-arm/elf.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/include/asm-arm/elf.h b/include/asm-arm/elf.h
new file mode 100644
index 00000000000..cbceacbe5af
--- /dev/null
+++ b/include/asm-arm/elf.h
@@ -0,0 +1,133 @@
+#ifndef __ASMARM_ELF_H
+#define __ASMARM_ELF_H
+
+#include <linux/config.h>
+
+/*
+ * ELF register definitions..
+ */
+
+#include <asm/ptrace.h>
+#include <asm/user.h>
+#include <asm/procinfo.h>
+
+typedef unsigned long elf_greg_t;
+typedef unsigned long elf_freg_t[3];
+
+#define EM_ARM 40
+#define EF_ARM_APCS26 0x08
+#define EF_ARM_SOFT_FLOAT 0x200
+#define EF_ARM_EABI_MASK 0xFF000000
+
+#define R_ARM_NONE 0
+#define R_ARM_PC24 1
+#define R_ARM_ABS32 2
+
+#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef struct user_fp elf_fpregset_t;
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ( ((x)->e_machine == EM_ARM) && (ELF_PROC_OK((x))) )
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS ELFCLASS32
+#ifdef __ARMEB__
+#define ELF_DATA ELFDATA2MSB;
+#else
+#define ELF_DATA ELFDATA2LSB;
+#endif
+#define ELF_ARCH EM_ARM
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 4096
+
+/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
+ use of this is to invoke "./ld.so someprog" to test out a new version of
+ the loader. We need to make sure that it is out of the way of the program
+ that it will "exec", and that there is sufficient room for the brk. */
+
+#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
+
+/* When the program starts, a1 contains a pointer to a function to be
+ registered with atexit, as per the SVR4 ABI. A value of 0 means we
+ have no such handler. */
+#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
+
+/* This yields a mask that user programs can use to figure out what
+ instruction set this cpu supports. */
+
+#define ELF_HWCAP (elf_hwcap)
+
+/* This yields a string that ld.so will use to load implementation
+ specific libraries for optimization. This is more specific in
+ intent than poking at uname or /proc/cpuinfo. */
+
+/* For now we just provide a fairly general string that describes the
+ processor family. This could be made more specific later if someone
+ implemented optimisations that require it. 26-bit CPUs give you
+ "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
+ supported). 32-bit CPUs give you "v3[lb]" for anything based on an
+ ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
+ core. */
+
+#define ELF_PLATFORM_SIZE 8
+extern char elf_platform[];
+#define ELF_PLATFORM (elf_platform)
+
+#ifdef __KERNEL__
+
+/*
+ * 32-bit code is always OK. Some cpus can do 26-bit, some can't.
+ */
+#define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
+
+#define ELF_THUMB_OK(x) \
+ (( (elf_hwcap & HWCAP_THUMB) && ((x)->e_entry & 1) == 1) || \
+ ((x)->e_entry & 3) == 0)
+
+#define ELF_26BIT_OK(x) \
+ (( (elf_hwcap & HWCAP_26BIT) && (x)->e_flags & EF_ARM_APCS26) || \
+ ((x)->e_flags & EF_ARM_APCS26) == 0)
+
+#ifndef CONFIG_IWMMXT
+
+/* Old NetWinder binaries were compiled in such a way that the iBCS
+ heuristic always trips on them. Until these binaries become uncommon
+ enough not to care, don't trust the `ibcs' flag here. In any case
+ there is no other ELF system currently supported by iBCS.
+ @@ Could print a warning message to encourage users to upgrade. */
+#define SET_PERSONALITY(ex,ibcs2) \
+ set_personality(((ex).e_flags&EF_ARM_APCS26 ?PER_LINUX :PER_LINUX_32BIT))
+
+#else
+
+/*
+ * All iWMMXt capable CPUs don't support 26-bit mode. Yet they can run
+ * legacy binaries which used to contain FPA11 floating point instructions
+ * that have always been emulated by the kernel. PFA11 and iWMMXt overlap
+ * on coprocessor 1 space though. We therefore must decide if given task
+ * is allowed to use CP 0 and 1 for iWMMXt, or if they should be blocked
+ * at all times for the prefetch exception handler to catch FPA11 opcodes
+ * and emulate them. The best indication to discriminate those two cases
+ * is the SOFT_FLOAT flag in the ELF header.
+ */
+
+#define SET_PERSONALITY(ex,ibcs2) \
+do { \
+ set_personality(PER_LINUX_32BIT); \
+ if (((ex).e_flags & EF_ARM_EABI_MASK) || \
+ ((ex).e_flags & EF_ARM_SOFT_FLOAT)) \
+ set_thread_flag(TIF_USING_IWMMXT); \
+} while (0)
+
+#endif
+
+#endif
+
+#endif