MIPS support for libc.
Change-Id: I2864dea04b3faf2d919165dcaa600af5b16c41c8
Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Raghu Gandham <raghu@mips.com>
diff --git a/libc/arch-mips/include/machine/exec.h b/libc/arch-mips/include/machine/exec.h
new file mode 100644
index 0000000..3c63f74
--- /dev/null
+++ b/libc/arch-mips/include/machine/exec.h
@@ -0,0 +1,188 @@
+/* $OpenBSD: exec.h,v 1.1 2004/10/18 19:05:36 grange Exp $ */
+
+/*
+ * Copyright (c) 1996-2004 Per Fogelstrom, Opsycon AB
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#ifndef _MIPS64_EXEC_H_
+#define _MIPS64_EXEC_H_
+
+#define __LDPGSZ 4096
+
+/*
+ * Define what exec "formats" we should handle.
+ */
+#define NATIVE_EXEC_ELF
+#define NATIVE_ELFSIZE 64
+#define EXEC_SCRIPT
+
+/*
+ * If included from sys/exec.h define kernels ELF format.
+ */
+#ifdef __LP64__
+#define ARCH_ELFSIZE 64
+#define DB_ELFSIZE 64
+#define ELF_TARG_CLASS ELFCLASS64
+#else
+#define ARCH_ELFSIZE 32
+#define DB_ELFSIZE 32
+#define ELF_TARG_CLASS ELFCLASS32
+#endif
+
+#if defined(__MIPSEB__)
+#define ELF_TARG_DATA ELFDATA2MSB
+#else
+#define ELF_TARG_DATA ELFDATA2LSB
+#endif
+#define ELF_TARG_MACH EM_MIPS
+
+#define _NLIST_DO_ELF
+
+#if defined(_LP64)
+#define _KERN_DO_ELF64
+#if defined(COMPAT_O32)
+#define _KERN_DO_ELF
+#endif
+#else
+#define _KERN_DO_ELF
+#endif
+
+/* Information taken from MIPS ABI supplemental */
+
+/* Architecture dependent Segment types - p_type */
+#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
+
+/* Architecture dependent d_tag field for Elf32_Dyn. */
+#define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime Linker Interface ID */
+#define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */
+#define DT_MIPS_ICHECKSUM 0x70000003 /* Cksum of ext. str. and com. sizes */
+#define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */
+#define DT_MIPS_FLAGS 0x70000005 /* Flags */
+#define DT_MIPS_BASE_ADDRESS 0x70000006 /* Segment base address */
+#define DT_MIPS_CONFLICT 0x70000008 /* Adr of .conflict section */
+#define DT_MIPS_LIBLIST 0x70000009 /* Address of .liblist section */
+#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local .GOT entries */
+#define DT_MIPS_CONFLICTNO 0x7000000b /* Number of .conflict entries */
+#define DT_MIPS_LIBLISTNO 0x70000010 /* Number of .liblist entries */
+#define DT_MIPS_SYMTABNO 0x70000011 /* Number of .dynsym entries */
+#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */
+#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in .dynsym */
+#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */
+#define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */
+
+#define DT_PROCNUM (DT_MIPS_RLD_MAP - DT_LOPROC + 1)
+
+/*
+ * Legal values for e_flags field of Elf32_Ehdr.
+ */
+#define EF_MIPS_NOREORDER 0x00000001 /* .noreorder was used */
+#define EF_MIPS_PIC 0x00000002 /* Contains PIC code */
+#define EF_MIPS_CPIC 0x00000004 /* Uses PIC calling sequence */
+#define EF_MIPS_ABI2 0x00000020 /* -n32 on Irix 6 */
+#define EF_MIPS_32BITMODE 0x00000100 /* 64 bit in 32 bit mode... */
+#define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */
+#define E_MIPS_ARCH_1 0x00000000
+#define E_MIPS_ARCH_2 0x10000000
+#define E_MIPS_ARCH_3 0x20000000
+#define E_MIPS_ARCH_4 0x30000000
+#define EF_MIPS_ABI 0x0000f000 /* ABI level */
+#define E_MIPS_ABI_NONE 0x00000000 /* ABI level not set */
+#define E_MIPS_ABI_O32 0x00001000
+#define E_MIPS_ABI_O64 0x00002000
+#define E_MIPS_ABI_EABI32 0x00004000
+#define E_MIPS_ABI_EABI64 0x00004000
+
+/*
+ * Mips special sections.
+ */
+#define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */
+#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */
+#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */
+
+/*
+ * Legal values for sh_type field of Elf32_Shdr.
+ */
+#define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */
+#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */
+#define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */
+#define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */
+#define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information */
+#define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */
+
+/*
+ * Legal values for sh_flags field of Elf32_Shdr.
+ */
+#define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */
+
+#if 0
+/*
+ * Entries found in sections of type SHT_MIPS_GPTAB.
+ */
+typedef union {
+ struct {
+ Elf32_Word gt_current_g_value; /* -G val used in compilation */
+ Elf32_Word gt_unused; /* Not used */
+ } gt_header; /* First entry in section */
+ struct {
+ Elf32_Word gt_g_value; /* If this val were used for -G */
+ Elf32_Word gt_bytes; /* This many bytes would be used */
+ } gt_entry; /* Subsequent entries in section */
+} Elf32_gptab;
+
+/*
+ * Entry found in sections of type SHT_MIPS_REGINFO.
+ */
+typedef struct {
+ Elf32_Word ri_gprmask; /* General registers used */
+ Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */
+ Elf32_Sword ri_gp_value; /* $gp register value */
+} Elf32_RegInfo;
+#endif
+
+
+/*
+ * Mips relocations.
+ */
+
+#define R_MIPS_NONE 0 /* No reloc */
+#define R_MIPS_16 1 /* Direct 16 bit */
+#define R_MIPS_32 2 /* Direct 32 bit */
+#define R_MIPS_REL32 3 /* PC relative 32 bit */
+#define R_MIPS_26 4 /* Direct 26 bit shifted */
+#define R_MIPS_HI16 5 /* High 16 bit */
+#define R_MIPS_LO16 6 /* Low 16 bit */
+#define R_MIPS_GPREL16 7 /* GP relative 16 bit */
+#define R_MIPS_LITERAL 8 /* 16 bit literal entry */
+#define R_MIPS_GOT16 9 /* 16 bit GOT entry */
+#define R_MIPS_PC16 10 /* PC relative 16 bit */
+#define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */
+#define R_MIPS_GPREL32 12 /* GP relative 32 bit */
+
+#define R_MIPS_64 18
+
+#define R_MIPS_REL32_64 ((R_MIPS_64 << 8) | R_MIPS_REL32)
+
+
+#endif /* !_MIPS64_EXEC_H_ */