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engine/system: add asm-based raise implementation for arm and aarch64, making Sys_DebugBreak more relevant, use tgkill instead of kill

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mittorn 2023-12-01 18:46:02 +03:00 committed by Alibek Omarov
parent 5568eccc8a
commit bb2753cbfc
2 changed files with 99 additions and 10 deletions
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22
engine/common/system.c
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@ -19,6 +19,10 @@ GNU General Public License for more details.
#include <stdlib.h>
#include <errno.h>
#if _MSC_VER
#include <intrin.h>
#endif
#ifdef XASH_SDL
#include <SDL.h>
#endif
@ -68,17 +72,15 @@ Sys_DebugBreak
*/
void Sys_DebugBreak( void )
{
#if XASH_LINUX || ( XASH_WIN32 && !XASH_64BIT )
#if _MSC_VER
if( Sys_DebuggerPresent() )
_asm { int 3 }
#elif XASH_X86
if( Sys_DebuggerPresent() )
asm volatile( "int $3;" );
#else
if( Sys_DebuggerPresent() )
raise( SIGINT );
#endif
if( Sys_DebuggerPresent( ))
__debugbreak();
#else // !_MSC_VER
if( Sys_DebuggerPresent( ))
{
INLINE_RAISE( SIGINT );
INLINE_NANOSLEEP1(); // sometimes signal comes with delay, let it interrupt nanosleep
}
#endif
}

87
engine/platform/platform.h
View File

@ -64,6 +64,8 @@ const char *Android_LoadID( void );
void Android_SaveID( const char *id );
void Android_Init( void );
void *Android_GetNativeObject( const char *name );
int Android_GetKeyboardHeight( void );
void Android_Shutdown( void );
#endif
#if XASH_WIN32
@ -256,4 +258,89 @@ void VoiceCapture_Shutdown( void );
qboolean VoiceCapture_Activate( qboolean activate );
qboolean VoiceCapture_Lock( qboolean lock );
// this allows to make break in current line, without entering libc code
// libc built with -fomit-frame-pointer may just eat stack frame (hello, glibc), making entering libc even more useless
// calling syscalls directly allows to make break like if it was asm("int $3") on x86
#if XASH_LINUX && XASH_X86
#define INLINE_RAISE(x) asm volatile( "int $3;" );
#define INLINE_NANOSLEEP1() // nothing!
#elif XASH_LINUX && XASH_ARM && !XASH_64BIT
#define INLINE_RAISE(x) do \
{ \
int raise_pid = getpid(); \
int raise_tid = gettid(); \
int raise_sig = (x); \
__asm__ volatile ( \
"mov r7,#268\n\t" \
"mov r0,%0\n\t" \
"mov r1,%1\n\t" \
"mov r2,%2\n\t" \
"svc 0\n\t" \
: \
: "r"(raise_pid), "r"(raise_tid), "r"(raise_sig) \
: "r0", "r1", "r2", "r7", "memory"
); \
} while( 0 )
#define INLINE_NANOSLEEP1() do \
{ \
struct timespec ns_t1 = {1, 0}; \
struct timespec ns_t2 = {0, 0}; \
__asm__ volatile ( \
"mov r7,#162\n\t" \
"mov r0,%0\n\t" \
"mov r1,%1\n\t" \
"svc 0\n\t" \
: \
: "r"(&ns_t1), "r"(&ns_t2) \
: "r0", "r1", "r7", "memory" \
); \
} while( 0 )
#elif XASH_LINUX && XASH_ARM && XASH_64BIT
#define INLINE_RAISE(x) do \
{ \
int raise_pid = getpid(); \
int raise_tid = gettid(); \
int raise_sig = (x); \
__asm__ volatile ( \
"mov x8,#131\n\t" \
"mov x0,%0\n\t" \
"mov x1,%1\n\t" \
"mov x2,%2\n\t" \
"svc 0\n\t" \
: \
: "r"(raise_pid), "r"(raise_tid), "r"(raise_sig) \
: "x0", "x1", "x2", "x8", "memory", "cc" \
); \
} while( 0 )
#define INLINE_NANOSLEEP1() do \
{ \
struct timespec ns_t1 = {1, 0}; \
struct timespec ns_t2 = {0, 0}; \
__asm__ volatile ( \
"mov x8,#101\n\t" \
"mov x0,%0\n\t" \
"mov x1,%1\n\t" \
"svc 0\n\t" \
: \
: "r"(&ns_t1), "r"(&ns_t2) \
: "x0", "x1", "x8", "memory", "cc" \
); \
} while( 0 )
#elif XASH_LINUX
#ifdef __NR_tgkill
#define INLINE_RAISE(x) syscall( __NR_tgkill, getpid(), gettid(), x )
#else // __NR_tgkill
#define INLINE_RAISE(x) raise(x)
#endif // __NR_tgkill
#define INLINE_NANOSLEEP1() do \
{ \
struct timespec ns_t1 = {1, 0}; \
struct timespec ns_t2 = {0, 0}; \
nanosleep( &ns_t1, &ns_t2 ); \
} while( 0 )
#else // generic
#define INLINE_RAISE(x) raise(x)
#define INLINE_NANOSLEEP1() sleep(1)
#endif // generic
#endif // PLATFORM_H