mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-11-05 20:41:06 +00:00
156 lines
5 KiB
C
156 lines
5 KiB
C
/* Copyright (c) 2011-2018, Scott Tsai
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* 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 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 HOLDER 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 DEBUG_BREAK_H
|
|
|
|
#ifdef _MSC_VER
|
|
|
|
#define debug_break __debugbreak
|
|
|
|
#else
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define DEBUG_BREAK_USE_TRAP_INSTRUCTION 1
|
|
#define DEBUG_BREAK_USE_BULTIN_TRAP 2
|
|
#define DEBUG_BREAK_USE_SIGTRAP 3
|
|
|
|
#if defined(__i386__) || defined(__x86_64__)
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
__inline__ static void trap_instruction(void)
|
|
{
|
|
__asm__ volatile("int $0x03");
|
|
}
|
|
#elif defined(__thumb__)
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
/* FIXME: handle __THUMB_INTERWORK__ */
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void trap_instruction(void)
|
|
{
|
|
/* See 'arm-linux-tdep.c' in GDB source.
|
|
* Both instruction sequences below work. */
|
|
#if 1
|
|
/* 'eabi_linux_thumb_le_breakpoint' */
|
|
__asm__ volatile(".inst 0xde01");
|
|
#else
|
|
/* 'eabi_linux_thumb2_le_breakpoint' */
|
|
__asm__ volatile(".inst.w 0xf7f0a000");
|
|
#endif
|
|
|
|
/* Known problem:
|
|
* After a breakpoint hit, can't 'stepi', 'step', or 'continue' in GDB.
|
|
* 'step' would keep getting stuck on the same instruction.
|
|
*
|
|
* Workaround: use the new GDB commands 'debugbreak-step' and
|
|
* 'debugbreak-continue' that become available
|
|
* after you source the script from GDB:
|
|
*
|
|
* $ gdb -x debugbreak-gdb.py <... USUAL ARGUMENTS ...>
|
|
*
|
|
* 'debugbreak-step' would jump over the breakpoint instruction with
|
|
* roughly equivalent of:
|
|
* (gdb) set $instruction_len = 2
|
|
* (gdb) tbreak *($pc + $instruction_len)
|
|
* (gdb) jump *($pc + $instruction_len)
|
|
*/
|
|
}
|
|
#elif defined(__arm__) && !defined(__thumb__)
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void trap_instruction(void)
|
|
{
|
|
/* See 'arm-linux-tdep.c' in GDB source,
|
|
* 'eabi_linux_arm_le_breakpoint' */
|
|
__asm__ volatile(".inst 0xe7f001f0");
|
|
/* Known problem:
|
|
* Same problem and workaround as Thumb mode */
|
|
}
|
|
#elif defined(__aarch64__) && defined(__APPLE__)
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_BULTIN_TRAP
|
|
#elif defined(__aarch64__)
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void trap_instruction(void)
|
|
{
|
|
/* See 'aarch64-tdep.c' in GDB source,
|
|
* 'aarch64_default_breakpoint' */
|
|
__asm__ volatile(".inst 0xd4200000");
|
|
}
|
|
#elif defined(__powerpc__)
|
|
/* PPC 32 or 64-bit, big or little endian */
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void trap_instruction(void)
|
|
{
|
|
/* See 'rs6000-tdep.c' in GDB source,
|
|
* 'rs6000_breakpoint' */
|
|
__asm__ volatile(".4byte 0x7d821008");
|
|
|
|
/* Known problem:
|
|
* After a breakpoint hit, can't 'stepi', 'step', or 'continue' in GDB.
|
|
* 'step' stuck on the same instruction ("twge r2,r2").
|
|
*
|
|
* The workaround is the same as ARM Thumb mode: use debugbreak-gdb.py
|
|
* or manually jump over the instruction. */
|
|
}
|
|
#else
|
|
#define DEBUG_BREAK_IMPL DEBUG_BREAK_USE_SIGTRAP
|
|
#endif
|
|
|
|
|
|
#ifndef DEBUG_BREAK_IMPL
|
|
#error "debugbreak.h is not supported on this target"
|
|
#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_TRAP_INSTRUCTION
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void debug_break(void)
|
|
{
|
|
trap_instruction();
|
|
}
|
|
#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_BULTIN_TRAP
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void debug_break(void)
|
|
{
|
|
__builtin_trap();
|
|
}
|
|
#elif DEBUG_BREAK_IMPL == DEBUG_BREAK_USE_SIGTRAP
|
|
#include <signal.h>
|
|
__attribute__((gnu_inline, always_inline))
|
|
__inline__ static void debug_break(void)
|
|
{
|
|
raise(SIGTRAP);
|
|
}
|
|
#else
|
|
#error "invalid DEBUG_BREAK_IMPL value"
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* ifdef _MSC_VER */
|
|
|
|
#endif /* ifndef DEBUG_BREAK_H */
|