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Report proper signal codes for SIGTRAP traps on MIPS.

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- Use TRAP_TRACE for traps after stepping via PT_STEP.
- Use TRAP_BRKPT for software breakpoint traps and watchpoint traps.

This was tested via the recently added siginfo ptrace() tests.  PT_STEP on
MIPS has several bugs that prevent it from working yet, but this does fix
the ptrace__breakpoint_siginfo test on MIPS.
This commit is contained in:
John Baldwin 2018-04-24 05:33:17 +00:00
parent 643ce7de72
commit 93fc184b82
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=332909
1 changed files with 3 additions and 0 deletions
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3
sys/mips/mips/trap.c
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@ -840,6 +840,7 @@ trap(struct trapframe *trapframe)
if (td->td_md.md_ss_addr != va ||
instr != MIPS_BREAK_SSTEP) {
i = SIGTRAP;
ucode = TRAP_BRKPT;
addr = trapframe->pc;
break;
}
@ -851,6 +852,7 @@ trap(struct trapframe *trapframe)
*/
addr = trapframe->pc;
i = SIGTRAP;
ucode = TRAP_TRACE;
break;
}
@ -865,6 +867,7 @@ trap(struct trapframe *trapframe)
va += sizeof(int);
printf("watch exception @ %p\n", (void *)va);
i = SIGTRAP;
ucode = TRAP_BRKPT;
addr = va;
break;
}