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platform_bionic/libc/include/sys/ucontext.h
Elliott Hughes 8ad4093659 Add #defines for some key enums. 
Building ruby actually trips over both of these:

* if the RTLD_ constants aren't #defined, it uses its own incorrect values.

* if the REG_ constants aren't #defined, it confuses x86 with x86-64.

In all other places where we have enums in our headers, we already match
existing glibc practice.

Bug: http://b/62531921
Test: builds
Change-Id: I5b3aab25a1a24611bdc58f2eda4104a78e9f841c
2017-06-15 15:12:29 -07:00

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/*
* Copyright (C) 2014 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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 _SYS_UCONTEXT_H_
#define _SYS_UCONTEXT_H_
#include <sys/cdefs.h>
#include <signal.h>
#include <sys/user.h>
__BEGIN_DECLS
#if defined(__arm__)
enum {
REG_R0 = 0,
#define REG_R0 REG_R0
REG_R1,
#define REG_R1 REG_R1
REG_R2,
#define REG_R2 REG_R2
REG_R3,
#define REG_R3 REG_R3
REG_R4,
#define REG_R4 REG_R4
REG_R5,
#define REG_R5 REG_R5
REG_R6,
#define REG_R6 REG_R6
REG_R7,
#define REG_R7 REG_R7
REG_R8,
#define REG_R8 REG_R8
REG_R9,
#define REG_R9 REG_R9
REG_R10,
#define REG_R10 REG_R10
REG_R11,
#define REG_R11 REG_R11
REG_R12,
#define REG_R12 REG_R12
REG_R13,
#define REG_R13 REG_R13
REG_R14,
#define REG_R14 REG_R14
REG_R15,
#define REG_R15 REG_R15
};
#define NGREG 18 /* Like glibc. */
typedef int greg_t;
typedef greg_t gregset_t[NGREG];
typedef struct user_fpregs fpregset_t;
#include <asm/sigcontext.h>
typedef struct sigcontext mcontext_t;
typedef struct ucontext {
unsigned long uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
sigset_t uc_sigmask;
/* Android has a wrong (smaller) sigset_t on ARM. */
uint32_t __padding_rt_sigset;
/* The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM. */
char __padding[120];
unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
} ucontext_t;
#elif defined(__aarch64__)
#define NGREG 34 /* x0..x30 + sp + pc + pstate */
typedef unsigned long greg_t;
typedef greg_t gregset_t[NGREG];
typedef struct user_fpsimd_struct fpregset_t;
#include <asm/sigcontext.h>
typedef struct sigcontext mcontext_t;
typedef struct ucontext {
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
sigset_t uc_sigmask;
/* The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM64. */
char __padding[128 - sizeof(sigset_t)];
mcontext_t uc_mcontext;
} ucontext_t;
#elif defined(__i386__)
enum {
REG_GS = 0,
#define REG_GS REG_GS
REG_FS,
#define REG_FS REG_FS
REG_ES,
#define REG_ES REG_ES
REG_DS,
#define REG_DS REG_DS
REG_EDI,
#define REG_EDI REG_EDI
REG_ESI,
#define REG_ESI REG_ESI
REG_EBP,
#define REG_EBP REG_EBP
REG_ESP,
#define REG_ESP REG_ESP
REG_EBX,
#define REG_EBX REG_EBX
REG_EDX,
#define REG_EDX REG_EDX
REG_ECX,
#define REG_ECX REG_ECX
REG_EAX,
#define REG_EAX REG_EAX
REG_TRAPNO,
#define REG_TRAPNO REG_TRAPNO
REG_ERR,
#define REG_ERR REG_ERR
REG_EIP,
#define REG_EIP REG_EIP
REG_CS,
#define REG_CS REG_CS
REG_EFL,
#define REG_EFL REG_EFL
REG_UESP,
#define REG_UESP REG_UESP
REG_SS,
#define REG_SS REG_SS
NGREG
#define NGREG NGREG
};
typedef int greg_t;
typedef greg_t gregset_t[NGREG];
struct _libc_fpreg {
unsigned short significand[4];
unsigned short exponent;
};
struct _libc_fpstate {
unsigned long cw;
unsigned long sw;
unsigned long tag;
unsigned long ipoff;
unsigned long cssel;
unsigned long dataoff;
unsigned long datasel;
struct _libc_fpreg _st[8];
unsigned long status;
};
typedef struct _libc_fpstate* fpregset_t;
typedef struct {
gregset_t gregs;
fpregset_t fpregs;
unsigned long oldmask;
unsigned long cr2;
} mcontext_t;
typedef struct ucontext {
unsigned long uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
sigset_t uc_sigmask;
/* Android has a wrong (smaller) sigset_t on x86. */
uint32_t __padding_rt_sigset;
struct _libc_fpstate __fpregs_mem;
} ucontext_t;
#elif defined(__mips__)
/* glibc doesn't have names for MIPS registers. */
#define NGREG 32
#define NFPREG 32
typedef unsigned long long greg_t;
typedef greg_t gregset_t[NGREG];
typedef struct fpregset {
union {
double fp_dregs[NFPREG];
struct {
float _fp_fregs;
unsigned _fp_pad;
} fp_fregs[NFPREG];
} fp_r;
} fpregset_t;
#ifdef __LP64__
typedef struct {
gregset_t gregs;
fpregset_t fpregs;
greg_t mdhi;
greg_t hi1;
greg_t hi2;
greg_t hi3;
greg_t mdlo;
greg_t lo1;
greg_t lo2;
greg_t lo3;
greg_t pc;
uint32_t fpc_csr;
uint32_t used_math;
uint32_t dsp;
uint32_t reserved;
} mcontext_t;
#else
typedef struct {
unsigned regmask;
unsigned status;
greg_t pc;
gregset_t gregs;
fpregset_t fpregs;
unsigned fp_owned;
unsigned fpc_csr;
unsigned fpc_eir;
unsigned used_math;
unsigned dsp;
greg_t mdhi;
greg_t mdlo;
unsigned long hi1;
unsigned long lo1;
unsigned long hi2;
unsigned long lo2;
unsigned long hi3;
unsigned long lo3;
} mcontext_t;
#endif
typedef struct ucontext {
unsigned long uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
sigset_t uc_sigmask;
} ucontext_t;
#elif defined(__x86_64__)
enum {
REG_R8 = 0,
#define REG_R8 REG_R8
REG_R9,
#define REG_R9 REG_R9
REG_R10,
#define REG_R10 REG_R10
REG_R11,
#define REG_R11 REG_R11
REG_R12,
#define REG_R12 REG_R12
REG_R13,
#define REG_R13 REG_R13
REG_R14,
#define REG_R14 REG_R14
REG_R15,
#define REG_R15 REG_R15
REG_RDI,
#define REG_RDI REG_RDI
REG_RSI,
#define REG_RSI REG_RSI
REG_RBP,
#define REG_RBP REG_RBP
REG_RBX,
#define REG_RBX REG_RBX
REG_RDX,
#define REG_RDX REG_RDX
REG_RAX,
#define REG_RAX REG_RAX
REG_RCX,
#define REG_RCX REG_RCX
REG_RSP,
#define REG_RSP REG_RSP
REG_RIP,
#define REG_RIP REG_RIP
REG_EFL,
#define REG_EFL REG_EFL
REG_CSGSFS,
#define REG_CSGSFS REG_CSGSFS
REG_ERR,
#define REG_ERR REG_ERR
REG_TRAPNO,
#define REG_TRAPNO REG_TRAPNO
REG_OLDMASK,
#define REG_OLDMASK REG_OLDMASK
REG_CR2,
#define REG_CR2 REG_CR2
NGREG
#define NGREG NGREG
};
typedef long greg_t;
typedef greg_t gregset_t[NGREG];
struct _libc_fpxreg {
unsigned short significand[4];
unsigned short exponent;
unsigned short padding[3];
};
struct _libc_xmmreg {
uint32_t element[4];
};
struct _libc_fpstate {
uint16_t cwd;
uint16_t swd;
uint16_t ftw;
uint16_t fop;
uint64_t rip;
uint64_t rdp;
uint32_t mxcsr;
uint32_t mxcr_mask;
struct _libc_fpxreg _st[8];
struct _libc_xmmreg _xmm[16];
uint32_t padding[24];
};
typedef struct _libc_fpstate* fpregset_t;
typedef struct {
gregset_t gregs;
fpregset_t fpregs;
unsigned long __reserved1[8];
} mcontext_t;
typedef struct ucontext {
unsigned long uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
sigset_t uc_sigmask;
struct _libc_fpstate __fpregs_mem;
} ucontext_t;
#endif
__END_DECLS
#endif /* _SYS_UCONTEXT_H_ */
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