42086cec32
For the 'return' command, GDB needs to adjust WINDOWBASE. In case WB is different from 0, we need to rotate the window register file and update WINDOWSTART and WMASK. This patch also removes some ret|= statements for __get_user/__put_user as the address range was alrady checked a couple of lines earlier. Signed-off-by: Chris Zankel <chris@zankel.net>
205 lines
5.7 KiB
C
205 lines
5.7 KiB
C
/*
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* include/asm-xtensa/elf.h
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*
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* ELF register definitions
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_ELF_H
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#define _XTENSA_ELF_H
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#include <asm/ptrace.h>
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/* Xtensa processor ELF architecture-magic number */
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#define EM_XTENSA 94
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#define EM_XTENSA_OLD 0xABC7
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/* Xtensa relocations defined by the ABIs */
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#define R_XTENSA_NONE 0
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#define R_XTENSA_32 1
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#define R_XTENSA_RTLD 2
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#define R_XTENSA_GLOB_DAT 3
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#define R_XTENSA_JMP_SLOT 4
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#define R_XTENSA_RELATIVE 5
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#define R_XTENSA_PLT 6
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#define R_XTENSA_OP0 8
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#define R_XTENSA_OP1 9
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#define R_XTENSA_OP2 10
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#define R_XTENSA_ASM_EXPAND 11
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#define R_XTENSA_ASM_SIMPLIFY 12
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#define R_XTENSA_GNU_VTINHERIT 15
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#define R_XTENSA_GNU_VTENTRY 16
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#define R_XTENSA_DIFF8 17
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#define R_XTENSA_DIFF16 18
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#define R_XTENSA_DIFF32 19
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#define R_XTENSA_SLOT0_OP 20
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#define R_XTENSA_SLOT1_OP 21
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#define R_XTENSA_SLOT2_OP 22
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#define R_XTENSA_SLOT3_OP 23
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#define R_XTENSA_SLOT4_OP 24
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#define R_XTENSA_SLOT5_OP 25
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#define R_XTENSA_SLOT6_OP 26
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#define R_XTENSA_SLOT7_OP 27
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#define R_XTENSA_SLOT8_OP 28
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#define R_XTENSA_SLOT9_OP 29
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#define R_XTENSA_SLOT10_OP 30
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#define R_XTENSA_SLOT11_OP 31
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#define R_XTENSA_SLOT12_OP 32
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#define R_XTENSA_SLOT13_OP 33
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#define R_XTENSA_SLOT14_OP 34
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#define R_XTENSA_SLOT0_ALT 35
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#define R_XTENSA_SLOT1_ALT 36
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#define R_XTENSA_SLOT2_ALT 37
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#define R_XTENSA_SLOT3_ALT 38
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#define R_XTENSA_SLOT4_ALT 39
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#define R_XTENSA_SLOT5_ALT 40
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#define R_XTENSA_SLOT6_ALT 41
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#define R_XTENSA_SLOT7_ALT 42
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#define R_XTENSA_SLOT8_ALT 43
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#define R_XTENSA_SLOT9_ALT 44
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#define R_XTENSA_SLOT10_ALT 45
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#define R_XTENSA_SLOT11_ALT 46
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#define R_XTENSA_SLOT12_ALT 47
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#define R_XTENSA_SLOT13_ALT 48
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#define R_XTENSA_SLOT14_ALT 49
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/* ELF register definitions. This is needed for core dump support. */
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typedef unsigned long elf_greg_t;
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typedef struct {
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elf_greg_t pc;
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elf_greg_t ps;
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elf_greg_t lbeg;
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elf_greg_t lend;
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elf_greg_t lcount;
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elf_greg_t sar;
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elf_greg_t windowstart;
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elf_greg_t windowbase;
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elf_greg_t reserved[8+48];
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elf_greg_t a[64];
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} xtensa_gregset_t;
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#define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t))
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
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#define ELF_NFPREG 18
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typedef unsigned int elf_fpreg_t;
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typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
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#define ELF_CORE_COPY_REGS(_eregs, _pregs) \
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xtensa_elf_core_copy_regs ((xtensa_gregset_t*)&(_eregs), _pregs);
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extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *);
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) ( ( (x)->e_machine == EM_XTENSA ) || \
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( (x)->e_machine == EM_XTENSA_OLD ) )
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/*
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* These are used to set parameters in the core dumps.
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*/
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#ifdef __XTENSA_EL__
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# define ELF_DATA ELFDATA2LSB
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#elif defined(__XTENSA_EB__)
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# define ELF_DATA ELFDATA2MSB
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#else
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# error processor byte order undefined!
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#endif
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_XTENSA
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
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/*
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* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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* use of this is to invoke "./ld.so someprog" to test out a new version of
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* the loader. We need to make sure that it is out of the way of the program
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* that it will "exec", and that there is sufficient room for the brk.
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*/
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#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
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/*
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* This yields a mask that user programs can use to figure out what
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* instruction set this CPU supports. This could be done in user space,
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* but it's not easy, and we've already done it here.
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*/
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#define ELF_HWCAP (0)
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/*
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* This yields a string that ld.so will use to load implementation
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* specific libraries for optimization. This is more specific in
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* intent than poking at uname or /proc/cpuinfo.
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* For the moment, we have only optimizations for the Intel generations,
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* but that could change...
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*/
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#define ELF_PLATFORM (NULL)
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/*
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* The Xtensa processor ABI says that when the program starts, a2
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* contains a pointer to a function which might be registered using
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* `atexit'. This provides a mean for the dynamic linker to call
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* DT_FINI functions for shared libraries that have been loaded before
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* the code runs.
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*
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* A value of 0 tells we have no such handler.
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*
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* We might as well make sure everything else is cleared too (except
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* for the stack pointer in a1), just to make things more
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* deterministic. Also, clearing a0 terminates debugger backtraces.
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*/
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#define ELF_PLAT_INIT(_r, load_addr) \
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do { _r->areg[0]=0; /*_r->areg[1]=0;*/ _r->areg[2]=0; _r->areg[3]=0; \
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_r->areg[4]=0; _r->areg[5]=0; _r->areg[6]=0; _r->areg[7]=0; \
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_r->areg[8]=0; _r->areg[9]=0; _r->areg[10]=0; _r->areg[11]=0; \
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_r->areg[12]=0; _r->areg[13]=0; _r->areg[14]=0; _r->areg[15]=0; \
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} while (0)
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typedef struct {
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xtregs_opt_t opt;
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xtregs_user_t user;
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#if XTENSA_HAVE_COPROCESSORS
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xtregs_cp0_t cp0;
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xtregs_cp1_t cp1;
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xtregs_cp2_t cp2;
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xtregs_cp3_t cp3;
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xtregs_cp4_t cp4;
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xtregs_cp5_t cp5;
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xtregs_cp6_t cp6;
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xtregs_cp7_t cp7;
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#endif
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} elf_xtregs_t;
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#define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX_32BIT)
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struct task_struct;
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extern void do_copy_regs (xtensa_gregset_t*, struct pt_regs*,
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struct task_struct*);
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extern void do_restore_regs (xtensa_gregset_t*, struct pt_regs*,
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struct task_struct*);
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extern void do_save_fpregs (elf_fpregset_t*, struct pt_regs*,
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struct task_struct*);
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extern int do_restore_fpregs (elf_fpregset_t*, struct pt_regs*,
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struct task_struct*);
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#endif /* _XTENSA_ELF_H */
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