430b529111
The current SYS_EXIT has a bug that when making the call it always uses the v2 calling convention. This is undefined behavior according to the semihosting specification: https://developer.arm.com/docs/100863/latest/semihosting-operations/sys_exit-0x18 This patch fixes it by making sure v1 passes the argument directly in the register instead of in a block. And for v2 it does the same if the v2 extension isn't supported. The sequence generated now is 12424: ebfffecd bl 11f60 <_has_ext_exit_extended> 12428: e3500000 cmp r0, #0 1242c: 11a0500d movne r5, sp 12430: 059d5000 ldreq r5, [sp] 12434: e1a00004 mov r0, r4 12438: e1a01005 mov r1, r5 1243c: ef00f000 svc 0x0000f000 Signed-off-by: Tamar Christina <tamar.christina@arm.com>
53 lines
823 B
C
53 lines
823 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 (int, int);
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int
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_kill (int pid, int sig)
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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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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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switch (sig)
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{
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case SIGABRT:
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{
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block[0] = ADP_Stopped_RunTimeError;
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break;
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}
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default:
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{
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block[0] = ADP_Stopped_ApplicationExit;
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break;
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}
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}
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#if SEMIHOST_V2
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if (_has_ext_exit_extended ())
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return do_AngelSWI (insn, block);
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else
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#endif
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return 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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}
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