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- Replace the stub value of 'eret' instruction with correct one.

This commit is contained in:
nisimura 1999-01-16 03:44:42 +00:00
parent f4b56d8060
commit f163b5653f
1 changed files with 4 additions and 8 deletions
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12
sys/arch/mips/mips/db_trace.c
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@ -1,4 +1,4 @@
/* $NetBSD: db_trace.c,v 1.5 1999/01/15 01:23:12 castor Exp $ */
/* $NetBSD: db_trace.c,v 1.6 1999/01/16 03:44:42 nisimura Exp $ */
/*
* Mach Operating System
@ -142,12 +142,10 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
#else
/*
* Imcomplete but practically useful stack backtrace.
* Fails to work when nested exception path steps across a LEAF
* function because below can not detected the return address.
*/
#define MIPS_JR_RA 0x03e00008 /* instruction code for jr ra */
#define MIPS_JR_K0 0x03400008 /* instruction code for jr k0 */
#define MIPS_ERET 0x12345678 /* instruction code for eret */
#define MIPS_ERET 0x42000018 /* instruction code for eret */
unsigned va, pc, ra, sp, func;
int insn;
InstFmt i;
@ -158,7 +156,7 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
pc = ddb_regs.f_regs[PC];
sp = ddb_regs.f_regs[SP];
ra = 0;
ra = ddb_regs.f_regs[RA];
do {
va = pc;
do {
@ -186,8 +184,6 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
stacksize = -(short)i.IType.imm;
va += sizeof(int);
} while (va < pc);
if (ra == 0)
ra = ddb_regs.f_regs[RA]; /* LEAF made the exception */
db_find_sym_and_offset(func, &name, &offset);
if (name == 0)
@ -196,7 +192,7 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
name, pc - func, (void *)ra, stacksize);
if (ra == pc) {
db_printf("--loop?--\n");
db_printf("-- loop? --\n");
return;
}
sp += stacksize;