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https://github.com/freebsd/freebsd-src
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* Factor out common code for manipulating the RSE backing store.
* Implement a fairly simplistic parser for unwinding stack frames. * Use unwind records for DDB's 'trace' command. Also add support for tracing past exceptions to the context which generated the exception. The stack unwind code requires a toolchain based on binutils-2.11.2 or later and gcc-3.0.1 or later.
This commit is contained in:
Doug Rabson
parent
c3338474b9
commit
d57b94ba65
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=85685
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@ -51,6 +51,7 @@
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#include <vm/vm.h>
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#include <machine/inst.h>
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#include <machine/rse.h>
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#include <machine/db_machdep.h>
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#include <machine/mutex.h>
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@ -230,49 +231,6 @@ struct db_variable db_regs[] = {
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};
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struct db_variable *db_eregs = db_regs + sizeof(db_regs)/sizeof(db_regs[0]);
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static int
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rse_slot(u_int64_t *bsp)
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{
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return ((u_int64_t) bsp >> 3) & 0x3f;
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}
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/*
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* Return the address of register regno (regno >= 32) given that bsp
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* points at the base of the register stack frame.
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*/
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u_int64_t *
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db_rse_register_address(u_int64_t *bsp, int regno)
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{
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int off = regno - 32;
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u_int64_t rnats = (rse_slot(bsp) + off) / 63;
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u_int64_t *p = bsp + off + rnats;
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return p;
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}
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u_int64_t *
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db_rse_current_frame()
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{
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int sof = ddb_regs.tf_cr_ifs & 0x7f;
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u_int64_t *bsp = (u_int64_t *)
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(ddb_regs.tf_ar_bspstore + ddb_regs.tf_ndirty);
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return db_rse_previous_frame(bsp, sof);
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}
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u_int64_t *
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db_rse_previous_frame(u_int64_t *bsp, int sof)
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{
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int slot = rse_slot(bsp);
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int rnats = 0;
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int count = sof;
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while (count > slot) {
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count -= 63;
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rnats++;
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slot = 63;
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}
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return bsp - sof - rnats;
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}
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static int
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db_get_rse_reg(struct db_variable *vp, db_expr_t *valuep, int op)
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{
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@ -285,8 +243,8 @@ db_get_rse_reg(struct db_variable *vp, db_expr_t *valuep, int op)
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if (op == DB_VAR_GET)
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*valuep = 0xdeadbeefdeadbeef;
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} else {
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bsp = db_rse_previous_frame(bsp, sof);
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reg = db_rse_register_address(bsp, regno);
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bsp = ia64_rse_previous_frame(bsp, sof);
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reg = ia64_rse_register_address(bsp, regno);
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if (op == DB_VAR_GET)
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*valuep = *reg;
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else
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@ -471,8 +429,8 @@ db_register_value(regs, regno)
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if (regno - 32 >= sof) {
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return 0xdeadbeefdeadbeef;
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} else {
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bsp = db_rse_previous_frame(bsp, sof);
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reg = db_rse_register_address(bsp, regno);
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bsp = ia64_rse_previous_frame(bsp, sof);
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reg = ia64_rse_register_address(bsp, regno);
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return *reg;
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}
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}
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@ -30,6 +30,8 @@
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#include <sys/proc.h>
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#include <machine/inst.h>
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#include <machine/db_machdep.h>
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#include <machine/unwind.h>
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#include <machine/rse.h>
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#include <ddb/ddb.h>
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#include <ddb/db_sym.h>
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@ -42,76 +44,94 @@ int db_md_set_watchpoint __P((db_expr_t addr, db_expr_t size));
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int db_md_clr_watchpoint __P((db_expr_t addr, db_expr_t size));
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void db_md_list_watchpoints __P((void));
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extern char ia64_vector_table[], do_syscall[], do_syscall_end[];
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void
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db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *modif)
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{
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db_addr_t callpc;
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u_int64_t *bsp;
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int sof, sol;
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struct ia64_unwind_state *us;
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if (count == -1)
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count = 65535;
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if (!have_addr) {
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callpc = (db_addr_t)ddb_regs.tf_cr_iip;
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bsp = db_rse_current_frame();
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sof = ddb_regs.tf_cr_ifs & 0x7f;
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sol = (ddb_regs.tf_cr_ifs >> 7) & 0x7f;
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us = ia64_create_unwind_state(&ddb_regs);
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} else {
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callpc = 0; /* XXX */
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bsp = 0; /* XXX */
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sof = 0; /* XXX */
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sol = 0; /* XXX */
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return; /* XXX */
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}
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if (!us) {
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db_printf("db_stack_trace_cmd: can't create unwind state\n");
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return;
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}
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while (count--) {
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const char * name;
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db_expr_t ip;
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db_expr_t offset;
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c_db_sym_t sym;
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u_int64_t ar_pfs;
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u_int64_t newpc;
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int newsof, newsol, nargs, i;
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int cfm, sof, sol, nargs, i;
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u_int64_t *bsp;
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u_int64_t *p, reg;
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/*
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* XXX this assumes the simplistic stack frames used
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* by the old toolchain.
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*/
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ar_pfs = *db_rse_register_address(bsp, 32 + sol - 1);
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newpc = *db_rse_register_address(bsp, 32 + sol - 2);
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newsof = ar_pfs & 0x7f;
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newsol = (ar_pfs >> 7) & 0x7f;
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ip = ia64_unwind_state_get_ip(us);
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cfm = ia64_unwind_state_get_cfm(us);
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bsp = ia64_unwind_state_get_bsp(us);
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sof = cfm & 0x7f;
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sol = (cfm >> 7) & 0x7f;
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sym = db_search_symbol(callpc, DB_STGY_ANY, &offset);
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sym = db_search_symbol(ip, DB_STGY_ANY, &offset);
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db_symbol_values(sym, &name, NULL);
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db_printf("%s(", name);
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nargs = newsof - newsol;
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nargs = sof - sol;
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if (nargs > 8)
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nargs = 8;
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for (i = 0; i < nargs; i++) {
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p = ia64_rse_register_address(bsp, 32 + i);
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db_read_bytes((vm_offset_t) p, sizeof(reg),
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(caddr_t) ®);
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if (i > 0)
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db_printf(", ");
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db_printf("0x%lx",
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*db_rse_register_address(bsp, 32 + i));
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db_printf("0x%lx", reg);
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}
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db_printf(") at ");
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db_printsym(callpc, DB_STGY_PROC);
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db_printsym(ip, DB_STGY_PROC);
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db_printf("\n");
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bsp = db_rse_previous_frame(bsp, newsol);
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callpc = newpc;
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sol = newsol;
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sof = newsof;
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if ((callpc >> 61) != 7)
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/*
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* Was this an exception? If so, we can keep unwinding
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* based on the interrupted trapframe. We could do
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* this by constructing funky unwind records in
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* exception.s but this is easier.
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*/
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if (ip >= (u_int64_t) &ia64_vector_table[0]
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&& ip < (u_int64_t) &ia64_vector_table[32768]) {
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u_int64_t sp = ia64_unwind_state_get_sp(us);
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ia64_free_unwind_state(us);
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us = ia64_create_unwind_state((struct trapframe *)
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(sp + 16));
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} else if (ip >= (u_int64_t) &do_syscall[0]
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&& ip < (u_int64_t) &do_syscall_end[0]) {
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u_int64_t sp = ia64_unwind_state_get_sp(us);
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ia64_free_unwind_state(us);
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us = ia64_create_unwind_state((struct trapframe *)
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(sp + 16 + 8*8));
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} else {
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if (ia64_unwind_state_previous_frame(us))
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break;
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}
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ip = ia64_unwind_state_get_ip(us);
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if (!ip)
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break;
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}
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ia64_free_unwind_state(us);
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}
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int
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db_md_set_watchpoint(addr, size)
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db_expr_t addr;
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@ -78,6 +78,8 @@
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#include <machine/sigframe.h>
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#include <machine/efi.h>
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#include <machine/inst.h>
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#include <machine/rse.h>
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#include <machine/unwind.h>
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#ifdef SKI
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extern void ia64_ski_init(void);
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@ -96,6 +98,10 @@ extern char kstack[];
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struct user *proc0uarea;
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vm_offset_t proc0kstack;
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extern u_int64_t kernel_text[], _end[];
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extern u_int64_t _ia64_unwind_start[];
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extern u_int64_t _ia64_unwind_end[];
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u_int64_t ia64_port_base;
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char machine[] = "ia64";
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@ -395,7 +401,17 @@ identifycpu(void)
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"\001LB");
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}
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extern char kernel_text[], _end[];
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static void
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add_kernel_unwind_tables(void *arg)
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{
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/*
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* Register the kernel's unwind table.
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*/
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ia64_add_unwind_table(kernel_text,
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_ia64_unwind_start,
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_ia64_unwind_end);
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}
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SYSINIT(unwind, SI_SUB_KMEM, SI_ORDER_ANY, add_kernel_unwind_tables, 0);
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static void
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map_pal_code(void)
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@ -1095,6 +1111,10 @@ sigreturn(struct thread *td,
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(caddr_t)&uc, sizeof(ucontext_t)))
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return (EFAULT);
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if (frame->tf_ndirty != 0) {
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printf("sigreturn: dirty user stacked registers\n");
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}
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/*
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* Restore the user-supplied information
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*/
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@ -1504,3 +1524,40 @@ ia64_pack_bundle(u_int64_t *lowp, u_int64_t *highp,
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*highp = high;
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}
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static int
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rse_slot(u_int64_t *bsp)
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{
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return ((u_int64_t) bsp >> 3) & 0x3f;
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}
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/*
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* Return the address of register regno (regno >= 32) given that bsp
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* points at the base of the register stack frame.
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*/
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u_int64_t *
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ia64_rse_register_address(u_int64_t *bsp, int regno)
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{
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int off = regno - 32;
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u_int64_t rnats = (rse_slot(bsp) + off) / 63;
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return bsp + off + rnats;
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}
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/*
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* Calculate the base address of the previous frame given that the
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* current frame's locals area is 'size'.
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*/
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u_int64_t *
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ia64_rse_previous_frame(u_int64_t *bsp, int size)
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{
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int slot = rse_slot(bsp);
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int rnats = 0;
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int count = size;
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while (count > slot) {
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count -= 63;
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rnats++;
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slot = 63;
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}
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return bsp - size - rnats;
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}
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@ -34,6 +34,7 @@
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#include <vm/vm_extern.h>
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#include <machine/frame.h>
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#include <machine/inst.h>
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#include <machine/rse.h>
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#define sign_extend(imm, w) (((int64_t)(imm) << (64 - (w))) >> (64 - (w)))
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@ -148,56 +149,6 @@ unaligned_decode_M5(union ia64_instruction ins, struct decoding *d)
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return 1;
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}
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static int
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rse_slot(u_int64_t *bsp)
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{
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return ((u_int64_t) bsp >> 3) & 0x3f;
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}
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/*
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* Return the address of register regno (regno >= 32) given that bsp
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* points at the base of the register stack frame.
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*/
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static u_int64_t *
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rse_register_address(u_int64_t *bsp, int regno)
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{
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int off = regno - 32;
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u_int64_t rnats = (rse_slot(bsp) + off) / 63;
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u_int64_t *p = bsp + off + rnats;
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/*
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* We only really need this if the current bspstore
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* hasn't advanced past the user's register frame. Its
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* hardly worth trying to optimise though.
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*/
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__asm __volatile("flushrs");
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return p;
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}
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static u_int64_t *
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rse_previous_frame(u_int64_t *bsp, int sof)
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{
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int slot = rse_slot(bsp);
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int rnats = 0;
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int count = sof;
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while (count > slot) {
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count -= 63;
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rnats++;
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slot = 63;
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}
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return bsp - sof - rnats;
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}
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static u_int64_t *
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rse_current_frame(struct trapframe *framep, struct thread *td)
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{
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int sof = framep->tf_cr_ifs & 0x7f;
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u_int64_t *bsp = (u_int64_t *) (td->td_kstack + framep->tf_ndirty);
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return rse_previous_frame(bsp, sof);
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}
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static int
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read_register(struct trapframe *framep, struct thread *td,
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int reg, u_int64_t *valuep)
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@ -210,10 +161,16 @@ read_register(struct trapframe *framep, struct thread *td,
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return 0;
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} else {
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u_int64_t cfm = framep->tf_cr_ifs;
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u_int64_t *bsp = (u_int64_t *) (td->td_kstack
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+ framep->tf_ndirty);
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int sof = cfm & 0x7f;
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int sor = 8*((cfm >> 14) & 15);
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int rrb_gr = (cfm >> 18) & 0x7f;
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u_int64_t *bsp = rse_current_frame(framep, td);
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/*
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* Skip back to the start of the interrupted frame.
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*/
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bsp = ia64_rse_previous_frame(bsp, sof);
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if (reg - 32 > sof)
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return EINVAL;
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@ -224,7 +181,7 @@ read_register(struct trapframe *framep, struct thread *td,
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reg = reg + rrb_gr;
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}
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*valuep = *rse_register_address(bsp, reg);
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*valuep = *ia64_rse_register_address(bsp, reg);
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return 0;
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}
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@ -242,10 +199,16 @@ write_register(struct trapframe *framep, struct thread *td,
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return 0;
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} else {
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u_int64_t cfm = framep->tf_cr_ifs;
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u_int64_t *bsp = (u_int64_t *) (td->td_kstack
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+ framep->tf_ndirty);
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int sof = cfm & 0x7f;
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int sor = 8*((cfm >> 14) & 15);
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int rrb_gr = (cfm >> 18) & 0x7f;
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u_int64_t *bsp = rse_current_frame(framep, td);
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/*
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* Skip back to the start of the interrupted frame.
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*/
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bsp = ia64_rse_previous_frame(bsp, sof);
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if (reg - 32 > sof)
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return EINVAL;
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@ -256,7 +219,7 @@ write_register(struct trapframe *framep, struct thread *td,
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reg = reg + rrb_gr;
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}
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*rse_register_address(bsp, reg) = value;
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*ia64_rse_register_address(bsp, reg) = value;
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return 0;
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}
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|
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@ -530,6 +493,13 @@ unaligned_fixup(struct trapframe *framep, struct thread *td)
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u_int64_t addr, update, value, isr;
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int error = 0;
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/*
|
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* We only really need this if the current bspstore
|
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* hasn't advanced past the user's register frame. Its
|
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* hardly worth trying to optimise though.
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*/
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__asm __volatile("flushrs");
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isr = framep->tf_cr_isr;
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error = read_register(framep, td, dec.basereg, &addr);
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if (error) {
|
||||
|
|
|
|||
1472
sys/ia64/ia64/unwind.c
Normal file
1472
sys/ia64/ia64/unwind.c
Normal file
File diff suppressed because it is too large
Load diff
35
sys/ia64/include/rse.h
Normal file
35
sys/ia64/include/rse.h
Normal file
|
|
@ -0,0 +1,35 @@
|
|||
/*-
|
||||
* Copyright (c) 2001 Doug Rabson
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_RSE_H_
|
||||
#define _MACHINE_RSE_H_
|
||||
|
||||
u_int64_t *ia64_rse_register_address(u_int64_t *bsp, int regno);
|
||||
u_int64_t *ia64_rse_previous_frame(u_int64_t *bsp, int size);
|
||||
|
||||
#endif /* _MACHINE_RSE_H_ */
|
||||
41
sys/ia64/include/unwind.h
Normal file
41
sys/ia64/include/unwind.h
Normal file
|
|
@ -0,0 +1,41 @@
|
|||
/*-
|
||||
* Copyright (c) 2001 Doug Rabson
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
struct ia64_unwind_table;
|
||||
|
||||
struct ia64_unwind_table *ia64_add_unwind_table(u_int64_t *base,
|
||||
u_int64_t *start,
|
||||
u_int64_t *end);
|
||||
void ia64_free_unwind_table(struct ia64_unwind_table *ut);
|
||||
struct ia64_unwind_state *ia64_create_unwind_state(struct trapframe *framep);
|
||||
void ia64_free_unwind_state(struct ia64_unwind_state *us);
|
||||
u_int64_t ia64_unwind_state_get_ip(struct ia64_unwind_state *us);
|
||||
u_int64_t ia64_unwind_state_get_sp(struct ia64_unwind_state *us);
|
||||
u_int64_t ia64_unwind_state_get_cfm(struct ia64_unwind_state *us);
|
||||
u_int64_t *ia64_unwind_state_get_bsp(struct ia64_unwind_state *us);
|
||||
int ia64_unwind_state_previous_frame(struct ia64_unwind_state *us);
|
||||
Loading…
Reference in a new issue