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Don't use anonymous entries in a struct; it seems to aggravate gcc 3.4.3.

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This commit is contained in:
Michael Brown 2005-05-20 11:22:09 +00:00
parent a96759f9c8
commit 5231b858c9
1 changed files with 95 additions and 8 deletions
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103
src/arch/i386/include/registers.h
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@ -1,9 +1,25 @@
#ifndef REGISTERS_H
#define REGISTERS_H
/** @file
*
* i386 registers.
*
* This file defines data structures that allow easy access to i386
* register dumps.
*
*/
#include "compiler.h" /* for doxygen */
#include "stdint.h"
/* Basic 16-bit and 32-bit register types */
/**
* A 16-bit general register.
*
* This type encapsulates a 16-bit register such as %ax, %bx, %cx,
* %dx, %si, %di, %bp or %sp.
*
*/
typedef union {
struct {
union {
@ -15,12 +31,33 @@ typedef union {
uint16_t word;
} PACKED reg16_t;
/**
* A 32-bit general register.
*
* This type encapsulates a 32-bit register such as %eax, %ebx, %ecx,
* %edx, %esi, %edi, %ebp or %esp.
*
*/
typedef union {
reg16_t;
struct {
union {
uint8_t l;
uint8_t byte;
};
uint8_t h;
} PACKED;
uint16_t word;
uint32_t dword;
} PACKED reg32_t;
/* As created by pushal / read by popal */
/**
* A 32-bit general register dump.
*
* This is the data structure that is created on the stack by the @c
* pushal instruction, and can be read back using the @c popal
* instruction.
*
*/
struct i386_regs {
union {
uint16_t di;
@ -72,7 +109,31 @@ struct i386_regs {
};
} PACKED;
/* Our pushal/popal equivalent for segment registers */
/**
* A segment register dump.
*
* The i386 has no equivalent of the @c pushal or @c popal
* instructions for the segment registers. We adopt the convention of
* always using the sequences
*
* @code
*
* pushw %gs ; pushw %fs ; pushw %es ; pushw %ds ; pushw %ss ; pushw %cs
*
* @endcode
*
* and
*
* @code
*
* addw $4, %sp ; popw %ds ; popw %es ; popw %fs ; popw %gs
*
* @endcode
*
* This is the data structure that is created and read back by these
* instruction sequences.
*
*/
struct i386_seg_regs {
uint16_t cs;
uint16_t ss;
@ -82,11 +143,37 @@ struct i386_seg_regs {
uint16_t gs;
} PACKED;
/* All i386 registers, as passed in by prot_call or kir_call */
/**
* A full register dump.
*
* This data structure is created by the instructions
*
* @code
*
* pushfl
* pushal
* pushw %gs ; pushw %fs ; pushw %es ; pushw %ds ; pushw %ss ; pushw %cs
*
* @endcode
*
* and can be read back using the instructions
*
* @code
*
* addw $4, %sp ; popw %ds ; popw %es ; popw %fs ; popw %gs
* popal
* popfl
*
* @endcode
*
* prot_call() and kir_call() create this data structure on the stack
* and pass in a pointer to this structure.
*
*/
struct i386_all_regs {
struct i386_seg_regs;
struct i386_regs;
uint32_t i386_flags;
struct i386_seg_regs segs;
struct i386_regs regs;
uint32_t flags;
} PACKED;
#endif /* REGISTERS_H */