mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-18 06:50:08 +00:00
arch/tile: avoid ISO namespace pollution with <asm/sigcontext.h>
<asm/sigcontext.h> is used by glibc's <bits/sigcontext.h> from <signal.h>, which means that it can't clutter the namespace with random symbols or #defines. However, we use <arch/abi.h> to get a suitable type to hold a machine register. This change makes <arch/abi.h> safe to use in this kind of context if __need_int_reg_t is defined prior to including the file; in that case, it only defines a few symbols that are safe in the ISO namespace (prefixed with double underscores). <asm/sigcontext.h> then uses the __uint_reg_t type instead of the normal uint_reg_t. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
parent
c3b92c8787
commit
e0b1f39d55
@ -15,13 +15,78 @@
|
||||
/**
|
||||
* @file
|
||||
*
|
||||
* ABI-related register definitions helpful when writing assembly code.
|
||||
* ABI-related register definitions.
|
||||
*/
|
||||
|
||||
#ifndef __ARCH_ABI_H__
|
||||
#define __ARCH_ABI_H__
|
||||
|
||||
#include <arch/chip.h>
|
||||
#if !defined __need_int_reg_t && !defined __DOXYGEN__
|
||||
# define __ARCH_ABI_H__
|
||||
# include <arch/chip.h>
|
||||
#endif
|
||||
|
||||
/* Provide the basic machine types. */
|
||||
#ifndef __INT_REG_BITS
|
||||
|
||||
/** Number of bits in a register. */
|
||||
#if defined __tilegx__
|
||||
# define __INT_REG_BITS 64
|
||||
#elif defined __tilepro__
|
||||
# define __INT_REG_BITS 32
|
||||
#elif !defined __need_int_reg_t
|
||||
# include <arch/chip.h>
|
||||
# define __INT_REG_BITS CHIP_WORD_SIZE()
|
||||
#else
|
||||
# error Unrecognized architecture with __need_int_reg_t
|
||||
#endif
|
||||
|
||||
#if __INT_REG_BITS == 64
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
/** Unsigned type that can hold a register. */
|
||||
typedef unsigned long long __uint_reg_t;
|
||||
|
||||
/** Signed type that can hold a register. */
|
||||
typedef long long __int_reg_t;
|
||||
#endif
|
||||
|
||||
/** String prefix to use for printf(). */
|
||||
#define __INT_REG_FMT "ll"
|
||||
|
||||
#else
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
/** Unsigned type that can hold a register. */
|
||||
typedef unsigned long __uint_reg_t;
|
||||
|
||||
/** Signed type that can hold a register. */
|
||||
typedef long __int_reg_t;
|
||||
#endif
|
||||
|
||||
/** String prefix to use for printf(). */
|
||||
#define __INT_REG_FMT "l"
|
||||
|
||||
#endif
|
||||
#endif /* __INT_REG_BITS */
|
||||
|
||||
|
||||
#ifndef __need_int_reg_t
|
||||
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
/** Unsigned type that can hold a register. */
|
||||
typedef __uint_reg_t uint_reg_t;
|
||||
|
||||
/** Signed type that can hold a register. */
|
||||
typedef __int_reg_t int_reg_t;
|
||||
#endif
|
||||
|
||||
/** String prefix to use for printf(). */
|
||||
#define INT_REG_FMT __INT_REG_FMT
|
||||
|
||||
/** Number of bits in a register. */
|
||||
#define INT_REG_BITS __INT_REG_BITS
|
||||
|
||||
|
||||
/* Registers 0 - 55 are "normal", but some perform special roles. */
|
||||
|
||||
@ -59,7 +124,7 @@
|
||||
* The ABI requires callers to allocate a caller state save area of
|
||||
* this many bytes at the bottom of each stack frame.
|
||||
*/
|
||||
#define C_ABI_SAVE_AREA_SIZE (2 * (CHIP_WORD_SIZE() / 8))
|
||||
#define C_ABI_SAVE_AREA_SIZE (2 * (INT_REG_BITS / 8))
|
||||
|
||||
/**
|
||||
* The operand to an 'info' opcode directing the backtracer to not
|
||||
@ -67,30 +132,10 @@
|
||||
*/
|
||||
#define INFO_OP_CANNOT_BACKTRACE 2
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
#if CHIP_WORD_SIZE() > 32
|
||||
|
||||
/** Unsigned type that can hold a register. */
|
||||
typedef unsigned long long uint_reg_t;
|
||||
#endif /* !__need_int_reg_t */
|
||||
|
||||
/** Signed type that can hold a register. */
|
||||
typedef long long int_reg_t;
|
||||
|
||||
/** String prefix to use for printf(). */
|
||||
#define INT_REG_FMT "ll"
|
||||
|
||||
#elif !defined(__LP64__) /* avoid confusion with LP64 cross-build tools */
|
||||
|
||||
/** Unsigned type that can hold a register. */
|
||||
typedef unsigned long uint_reg_t;
|
||||
|
||||
/** Signed type that can hold a register. */
|
||||
typedef long int_reg_t;
|
||||
|
||||
/** String prefix to use for printf(). */
|
||||
#define INT_REG_FMT "l"
|
||||
|
||||
#endif
|
||||
#endif /* __ASSEMBLER__ */
|
||||
/* Make sure we later can get all the definitions and declarations. */
|
||||
#undef __need_int_reg_t
|
||||
|
||||
#endif /* !__ARCH_ABI_H__ */
|
||||
|
||||
@ -15,6 +15,8 @@
|
||||
#ifndef _ASM_TILE_SIGCONTEXT_H
|
||||
#define _ASM_TILE_SIGCONTEXT_H
|
||||
|
||||
/* Don't pollute the namespace since <signal.h> includes this file. */
|
||||
#define __need_int_reg_t
|
||||
#include <arch/abi.h>
|
||||
|
||||
/*
|
||||
@ -22,14 +24,14 @@
|
||||
* but is simplified since we know the fault is from userspace.
|
||||
*/
|
||||
struct sigcontext {
|
||||
uint_reg_t gregs[53]; /* General-purpose registers. */
|
||||
uint_reg_t tp; /* Aliases gregs[TREG_TP]. */
|
||||
uint_reg_t sp; /* Aliases gregs[TREG_SP]. */
|
||||
uint_reg_t lr; /* Aliases gregs[TREG_LR]. */
|
||||
uint_reg_t pc; /* Program counter. */
|
||||
uint_reg_t ics; /* In Interrupt Critical Section? */
|
||||
uint_reg_t faultnum; /* Fault number. */
|
||||
uint_reg_t pad[5];
|
||||
__uint_reg_t gregs[53]; /* General-purpose registers. */
|
||||
__uint_reg_t tp; /* Aliases gregs[TREG_TP]. */
|
||||
__uint_reg_t sp; /* Aliases gregs[TREG_SP]. */
|
||||
__uint_reg_t lr; /* Aliases gregs[TREG_LR]. */
|
||||
__uint_reg_t pc; /* Program counter. */
|
||||
__uint_reg_t ics; /* In Interrupt Critical Section? */
|
||||
__uint_reg_t faultnum; /* Fault number. */
|
||||
__uint_reg_t pad[5];
|
||||
};
|
||||
|
||||
#endif /* _ASM_TILE_SIGCONTEXT_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user