6dbd190111
The _exit function currently passes -1 as a "sig" to the _kill function as an invalid signal number so that _kill can distinguish between an abort and a standard exit. For boards using the SYS_EXIT_EXTENDED semi-hosting operation to return a status code, this means that the "status" paramter to _exit is ignored and the return code is always -1. https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit_extended-0x20 This patch puts shared code between _kill and _exit into a new function _kill_shared that takes the semi-hosting "reason" to use (if semi-hosting is available) as an argument. For semi-hosting _kill_shared provides that "reason". Without the "sig" argument being used to distinguish between a normal and abnormal exit, the _exit function can provide the return code to be used if the SYS_EXIT_EXTENDED operation is available. Hence the exit code can be returned.
52 lines
931 B
C
52 lines
931 B
C
#include <_ansi.h>
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#include <signal.h>
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#include "swi.h"
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int _kill_shared (int, int, int) __attribute__((__noreturn__));
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int _kill (int, int);
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int
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_kill (int pid, int sig)
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{
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if (sig == SIGABRT)
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_kill_shared (pid, sig, ADP_Stopped_RunTimeError);
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else
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_kill_shared (pid, sig, ADP_Stopped_ApplicationExit);
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}
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int
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_kill_shared (int pid, int sig, int reason)
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{
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(void) pid; (void) sig;
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#ifdef ARM_RDI_MONITOR
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/* Note: The pid argument is thrown away. */
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int block[2];
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block[1] = sig;
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block[0] = reason;
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int insn;
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#if SEMIHOST_V2
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if (_has_ext_exit_extended ())
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{
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insn = AngelSWI_Reason_ReportExceptionExtended;
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}
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else
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#endif
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{
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insn = AngelSWI_Reason_ReportException;
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}
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#if SEMIHOST_V2
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if (_has_ext_exit_extended ())
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do_AngelSWI (insn, block);
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else
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#endif
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do_AngelSWI (insn, (void*)block[0]);
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#else
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asm ("swi %a0" :: "i" (SWI_Exit));
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#endif
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__builtin_unreachable();
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}
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