From dcd86148e23509fb2cedeb5ac38c20763b71141f Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Thu, 27 Oct 2022 08:58:37 +0200 Subject: [PATCH] linux-user/hppa: Detect glibc ABORT_INSTRUCTION and EXCP_BREAK handler The glibc on the hppa platform uses the "iitlbp %r0,(%sr0, %r0)" assembler instruction as ABORT_INSTRUCTION. If this (in userspace context) illegal assembler statement is found, dump the registers and report the failure to userspace the same way as the Linux kernel on physical hardware. For other illegal instructions report TARGET_ILL_ILLOPC instead of TARGET_ILL_ILLOPN as si_code. Additionally add the missing EXCP_BREAK exception handler which occurs when the "break x,y" assembler instruction is executed and report EXCP_ASSIST traps. Signed-off-by: Helge Deller Message-Id: Signed-off-by: Laurent Vivier --- linux-user/hppa/cpu_loop.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/linux-user/hppa/cpu_loop.c b/linux-user/hppa/cpu_loop.c index 1ef3b46191..8ab1335106 100644 --- a/linux-user/hppa/cpu_loop.c +++ b/linux-user/hppa/cpu_loop.c @@ -147,15 +147,20 @@ void cpu_loop(CPUHPPAState *env) force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, env->iaoq_f); break; case EXCP_ILL: - EXCP_DUMP(env, "qemu: got CPU exception 0x%x - aborting\n", trapnr); - force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->iaoq_f); + EXCP_DUMP(env, "qemu: EXCP_ILL exception %#x\n", trapnr); + force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->iaoq_f); break; case EXCP_PRIV_OPR: - EXCP_DUMP(env, "qemu: got CPU exception 0x%x - aborting\n", trapnr); - force_sig_fault(TARGET_SIGILL, TARGET_ILL_PRVOPC, env->iaoq_f); + /* check for glibc ABORT_INSTRUCTION "iitlbp %r0,(%sr0, %r0)" */ + EXCP_DUMP(env, "qemu: EXCP_PRIV_OPR exception %#x\n", trapnr); + if (env->cr[CR_IIR] == 0x04000000) { + force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->iaoq_f); + } else { + force_sig_fault(TARGET_SIGILL, TARGET_ILL_PRVOPC, env->iaoq_f); + } break; case EXCP_PRIV_REG: - EXCP_DUMP(env, "qemu: got CPU exception 0x%x - aborting\n", trapnr); + EXCP_DUMP(env, "qemu: EXCP_PRIV_REG exception %#x\n", trapnr); force_sig_fault(TARGET_SIGILL, TARGET_ILL_PRVREG, env->iaoq_f); break; case EXCP_OVERFLOW: @@ -167,6 +172,10 @@ void cpu_loop(CPUHPPAState *env) case EXCP_ASSIST: force_sig_fault(TARGET_SIGFPE, 0, env->iaoq_f); break; + case EXCP_BREAK: + EXCP_DUMP(env, "qemu: EXCP_BREAK exception %#x\n", trapnr); + force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->iaoq_f & ~3); + break; case EXCP_DEBUG: force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->iaoq_f); break;