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- Restore descriptive comments lost in the last commit. 

- XXX Put a note that local DDB command 'trapdump' is not available. XXX
This commit is contained in:
nisimura 1999-01-28 05:52:06 +00:00
parent d6c1a3e198
commit 8c3b908f26
1 changed files with 34 additions and 4 deletions
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38
sys/arch/mips/mips/db_interface.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: db_interface.c,v 1.10 1999/01/15 01:23:12 castor Exp $ */
/* $NetBSD: db_interface.c,v 1.11 1999/01/28 05:52:06 nisimura Exp $ */
/*
* Mach Operating System
@ -55,6 +55,7 @@ mips_reg_t kdbaux[11]; /* XXX struct switchframe: better inside curpcb? XXX */
void db_halt_cmd __P((db_expr_t, int, db_expr_t, char *));
void db_tlbdump_cmd __P((db_expr_t, int, db_expr_t, char *));
void db_trapdump_cmd __P((db_expr_t, int, db_expr_t, char *));
extern int kdbpeek __P((vaddr_t addr));
extern void kdbpoke __P((vaddr_t addr, int newval));
@ -168,7 +169,6 @@ kdb_trap(type, tfp)
f->f_regs[SP] = kdbaux[8];
f->f_regs[S8] = kdbaux[9];
f->f_regs[GP] = kdbaux[10];
/* XXX SR, CAUSE and VADDR XXX */
}
db_active++;
@ -177,7 +177,7 @@ kdb_trap(type, tfp)
cnpollc(0);
db_active--;
tfp[21] = f->f_regs[PC]; /* resume */
tfp[21] = f->f_regs[PC]; /* XXX resume XXX */
return (1);
}
@ -321,8 +321,19 @@ db_tlbdump_cmd(addr, have_addr, count, modif)
#endif
}
void
db_trapdump_cmd(addr, have_addr, count, modif)
db_expr_t addr;
int have_addr;
db_expr_t count;
char *modif;
{
db_printf("trap history is not available.\n");
}
struct db_command mips_db_command_table[] = {
{ "halt", db_halt_cmd, 0, 0 },
{ "trapdump", db_trapdump_cmd, 0, 0 },
{ "tlb", db_tlbdump_cmd, 0, 0 },
{ (char *)0, }
};
@ -333,6 +344,9 @@ db_machine_init()
db_machine_commands_install(mips_db_command_table);
}
/*
* Determine whether the instruction involves a delay slot.
*/
boolean_t
inst_branch(inst)
int inst;
@ -369,6 +383,9 @@ inst_branch(inst)
return delay;
}
/*
* Determine whether the instruction calls a function.
*/
boolean_t
inst_call(inst)
int inst;
@ -387,6 +404,9 @@ inst_call(inst)
return call;
}
/*
* Determine whether the instruction makes a jump.
*/
boolean_t
inst_unconditional_flow_transfer(inst)
int inst;
@ -399,6 +419,10 @@ inst_unconditional_flow_transfer(inst)
return jump;
}
/*
* Return the next pc if the given branch is taken.
* MachEmulateBranch() runs analysis for branch delay slot.
*/
db_addr_t
branch_taken(inst, pc, regs)
int inst;
@ -413,8 +437,14 @@ branch_taken(inst, pc, regs)
return ra;
}
/*
* Return the next pc of arbitrary instructions.
* MachEmulateBranch() runs analysis for branch delay slots.
*/
db_addr_t
next_instr_address(db_addr_t pc, boolean_t bd)
next_instr_address(pc, bd)
db_addr_t pc;
boolean_t bd;
{
vaddr_t ra;
unsigned fpucsr;