mirror of
https://git.FreeBSD.org/src.git
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Unwind across trap frames. Handles all entry points, except the EPC
syscall. This is an entry from userland anyway. MFC after: 1 week
This commit is contained in:
Marcel Moolenaar
parent
e319790c0c
commit
4784fd9ce2
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=149967
@ -28,6 +28,7 @@
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/frame.h>
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#include <machine/md_var.h>
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#include <machine/pcb.h>
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#include <err.h>
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@ -40,6 +41,7 @@ __FBSDID("$FreeBSD$");
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#include <inferior.h>
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#include <regcache.h>
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#include <frame-unwind.h>
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#include <ia64-tdep.h>
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#include "kgdb.h"
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@ -59,72 +61,72 @@ kgdb_trgt_fetch_registers(int regno __unused)
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}
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/* Registers 0-127: general registers. */
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supply_register(1, (char *)&pcb.pcb_special.gp);
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supply_register(4, (char *)&pcb.pcb_preserved.gr4);
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supply_register(5, (char *)&pcb.pcb_preserved.gr5);
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supply_register(6, (char *)&pcb.pcb_preserved.gr6);
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supply_register(7, (char *)&pcb.pcb_preserved.gr7);
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supply_register(12, (char *)&pcb.pcb_special.sp);
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supply_register(13, (char *)&pcb.pcb_special.tp);
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supply_register(IA64_GR1_REGNUM, (char *)&pcb.pcb_special.gp);
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supply_register(IA64_GR4_REGNUM, (char *)&pcb.pcb_preserved.gr4);
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supply_register(IA64_GR5_REGNUM, (char *)&pcb.pcb_preserved.gr5);
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supply_register(IA64_GR6_REGNUM, (char *)&pcb.pcb_preserved.gr6);
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supply_register(IA64_GR7_REGNUM, (char *)&pcb.pcb_preserved.gr7);
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supply_register(IA64_GR12_REGNUM, (char *)&pcb.pcb_special.sp);
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supply_register(IA64_GR12_REGNUM+1, (char *)&pcb.pcb_special.tp);
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/* Registers 128-255: floating-point registers. */
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supply_register(130, (char *)&pcb.pcb_preserved_fp.fr2);
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supply_register(131, (char *)&pcb.pcb_preserved_fp.fr3);
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supply_register(132, (char *)&pcb.pcb_preserved_fp.fr4);
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supply_register(133, (char *)&pcb.pcb_preserved_fp.fr5);
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supply_register(144, (char *)&pcb.pcb_preserved_fp.fr16);
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supply_register(145, (char *)&pcb.pcb_preserved_fp.fr17);
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supply_register(146, (char *)&pcb.pcb_preserved_fp.fr18);
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supply_register(147, (char *)&pcb.pcb_preserved_fp.fr19);
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supply_register(148, (char *)&pcb.pcb_preserved_fp.fr20);
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supply_register(149, (char *)&pcb.pcb_preserved_fp.fr21);
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supply_register(150, (char *)&pcb.pcb_preserved_fp.fr22);
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supply_register(151, (char *)&pcb.pcb_preserved_fp.fr23);
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supply_register(152, (char *)&pcb.pcb_preserved_fp.fr24);
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supply_register(153, (char *)&pcb.pcb_preserved_fp.fr25);
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supply_register(154, (char *)&pcb.pcb_preserved_fp.fr26);
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supply_register(155, (char *)&pcb.pcb_preserved_fp.fr27);
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supply_register(156, (char *)&pcb.pcb_preserved_fp.fr28);
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supply_register(157, (char *)&pcb.pcb_preserved_fp.fr29);
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supply_register(158, (char *)&pcb.pcb_preserved_fp.fr30);
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supply_register(159, (char *)&pcb.pcb_preserved_fp.fr31);
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supply_register(IA64_FR2_REGNUM, (char *)&pcb.pcb_preserved_fp.fr2);
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supply_register(IA64_FR2_REGNUM+1, (char *)&pcb.pcb_preserved_fp.fr3);
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supply_register(IA64_FR2_REGNUM+2, (char *)&pcb.pcb_preserved_fp.fr4);
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supply_register(IA64_FR2_REGNUM+3, (char *)&pcb.pcb_preserved_fp.fr5);
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supply_register(IA64_FR16_REGNUM, (char *)&pcb.pcb_preserved_fp.fr16);
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supply_register(IA64_FR16_REGNUM+1, (char*)&pcb.pcb_preserved_fp.fr17);
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supply_register(IA64_FR16_REGNUM+2, (char*)&pcb.pcb_preserved_fp.fr18);
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supply_register(IA64_FR16_REGNUM+3, (char*)&pcb.pcb_preserved_fp.fr19);
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supply_register(IA64_FR16_REGNUM+4, (char*)&pcb.pcb_preserved_fp.fr20);
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supply_register(IA64_FR16_REGNUM+5, (char*)&pcb.pcb_preserved_fp.fr21);
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supply_register(IA64_FR16_REGNUM+6, (char*)&pcb.pcb_preserved_fp.fr22);
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supply_register(IA64_FR16_REGNUM+7, (char*)&pcb.pcb_preserved_fp.fr23);
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supply_register(IA64_FR16_REGNUM+8, (char*)&pcb.pcb_preserved_fp.fr24);
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supply_register(IA64_FR16_REGNUM+9, (char*)&pcb.pcb_preserved_fp.fr25);
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supply_register(IA64_FR16_REGNUM+10,(char*)&pcb.pcb_preserved_fp.fr26);
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supply_register(IA64_FR16_REGNUM+11,(char*)&pcb.pcb_preserved_fp.fr27);
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supply_register(IA64_FR16_REGNUM+12,(char*)&pcb.pcb_preserved_fp.fr28);
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supply_register(IA64_FR16_REGNUM+13,(char*)&pcb.pcb_preserved_fp.fr29);
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supply_register(IA64_FR16_REGNUM+14,(char*)&pcb.pcb_preserved_fp.fr30);
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supply_register(IA64_FR16_REGNUM+15,(char*)&pcb.pcb_preserved_fp.fr31);
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/* Registers 320-327: branch registers. */
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if (pcb.pcb_special.__spare == ~0UL)
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supply_register(320, (char *)&pcb.pcb_special.rp);
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supply_register(321, (char *)&pcb.pcb_preserved.br1);
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supply_register(322, (char *)&pcb.pcb_preserved.br2);
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supply_register(323, (char *)&pcb.pcb_preserved.br3);
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supply_register(324, (char *)&pcb.pcb_preserved.br4);
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supply_register(325, (char *)&pcb.pcb_preserved.br5);
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supply_register(IA64_BR0_REGNUM, (char *)&pcb.pcb_special.rp);
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supply_register(IA64_BR1_REGNUM, (char *)&pcb.pcb_preserved.br1);
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supply_register(IA64_BR2_REGNUM, (char *)&pcb.pcb_preserved.br2);
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supply_register(IA64_BR3_REGNUM, (char *)&pcb.pcb_preserved.br3);
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supply_register(IA64_BR4_REGNUM, (char *)&pcb.pcb_preserved.br4);
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supply_register(IA64_BR5_REGNUM, (char *)&pcb.pcb_preserved.br5);
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/* Registers 328-333: misc. other registers. */
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supply_register(330, (char *)&pcb.pcb_special.pr);
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supply_register(IA64_PR_REGNUM, (char *)&pcb.pcb_special.pr);
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if (pcb.pcb_special.__spare == ~0UL) {
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r = pcb.pcb_special.iip + ((pcb.pcb_special.psr >> 41) & 3);
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supply_register(331, (char *)&r);
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supply_register(333, (char *)&pcb.pcb_special.cfm);
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supply_register(IA64_IP_REGNUM, (char *)&r);
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supply_register(IA64_CFM_REGNUM, (char *)&pcb.pcb_special.cfm);
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} else {
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supply_register(331, (char *)&pcb.pcb_special.rp);
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supply_register(333, (char *)&pcb.pcb_special.pfs);
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supply_register(IA64_IP_REGNUM, (char *)&pcb.pcb_special.rp);
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supply_register(IA64_CFM_REGNUM, (char *)&pcb.pcb_special.pfs);
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}
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/* Registers 334-461: application registers. */
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supply_register(350, (char *)&pcb.pcb_special.rsc);
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supply_register(IA64_RSC_REGNUM, (char *)&pcb.pcb_special.rsc);
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r = pcb.pcb_special.bspstore;
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if (pcb.pcb_special.__spare == ~0UL)
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r += pcb.pcb_special.ndirty;
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else
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r = ia64_bsp_adjust(r, IA64_CFM_SOF(pcb.pcb_special.pfs) -
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IA64_CFM_SOL(pcb.pcb_special.pfs));
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supply_register(351, (char *)&r); /* bsp */
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supply_register(352, (char *)&r); /* bspstore */
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supply_register(353, (char *)&pcb.pcb_special.rnat);
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supply_register(370, (char *)&pcb.pcb_special.unat);
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supply_register(374, (char *)&pcb.pcb_special.fpsr);
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supply_register(IA64_BSP_REGNUM, (char *)&r);
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supply_register(IA64_BSPSTORE_REGNUM, (char *)&r);
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supply_register(IA64_RNAT_REGNUM, (char *)&pcb.pcb_special.rnat);
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supply_register(IA64_UNAT_REGNUM, (char *)&pcb.pcb_special.unat);
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supply_register(IA64_FPSR_REGNUM, (char *)&pcb.pcb_special.fpsr);
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if (pcb.pcb_special.__spare == ~0UL)
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supply_register(398, (char *)&pcb.pcb_special.pfs);
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supply_register(399, (char *)&pcb.pcb_preserved.lc);
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supply_register(IA64_PFS_REGNUM, (char *)&pcb.pcb_special.pfs);
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supply_register(IA64_LC_REGNUM, (char *)&pcb.pcb_preserved.lc);
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}
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void
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@ -133,10 +135,97 @@ kgdb_trgt_store_registers(int regno __unused)
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fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
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}
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struct kgdb_frame_cache {
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CORE_ADDR bsp;
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CORE_ADDR ip;
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CORE_ADDR sp;
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CORE_ADDR saved_bsp;
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};
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#define SPECIAL(x) offsetof(struct trapframe, tf_special) \
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+ offsetof(struct _special, x)
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#define SCRATCH(x) offsetof(struct trapframe, tf_scratch) \
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+ offsetof(struct _caller_saved, x)
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#define SCRATCH_FP(x) offsetof(struct trapframe, tf_scratch_fp) \
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+ offsetof(struct _caller_saved_fp, x)
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static int kgdb_trgt_frame_ofs_gr[32] = {
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-1, /* gr0 */
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SPECIAL(gp),
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SCRATCH(gr2), SCRATCH(gr3),
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-1, -1, -1, -1, /* gr4-gr7 */
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SCRATCH(gr8), SCRATCH(gr9), SCRATCH(gr10), SCRATCH(gr11),
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SPECIAL(sp), SPECIAL(tp),
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SCRATCH(gr14), SCRATCH(gr15), SCRATCH(gr16), SCRATCH(gr17),
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SCRATCH(gr18), SCRATCH(gr19), SCRATCH(gr20), SCRATCH(gr21),
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SCRATCH(gr22), SCRATCH(gr23), SCRATCH(gr24), SCRATCH(gr25),
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SCRATCH(gr26), SCRATCH(gr27), SCRATCH(gr28), SCRATCH(gr29),
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SCRATCH(gr30), SCRATCH(gr31)
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};
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static int kgdb_trgt_frame_ofs_fr[32] = {
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-1, /* fr0: constant 0.0 */
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-1, /* fr1: constant 1.0 */
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-1, -1, -1, -1, /* fr2-fr5 */
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SCRATCH_FP(fr6), SCRATCH_FP(fr7), SCRATCH_FP(fr8), SCRATCH_FP(fr9),
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SCRATCH_FP(fr10), SCRATCH_FP(fr11), SCRATCH_FP(fr12), SCRATCH_FP(fr13),
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SCRATCH_FP(fr14), SCRATCH_FP(fr15)
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};
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static int kgdb_trgt_frame_ofs_br[8] = {
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SPECIAL(rp),
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-1, -1, -1, -1, -1, /* br1-br5 */
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SCRATCH(br6), SCRATCH(br7)
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};
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static int kgdb_trgt_frame_ofs_ar[49] = {
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/* ar0-ar15 */
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SPECIAL(rsc),
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-1, /* ar.bsp */
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SPECIAL(bspstore), SPECIAL(rnat),
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-1, -1, -1, -1, -1, /* ar20-ar24 */
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SCRATCH(csd), SCRATCH(ssd),
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-1, -1, -1, -1, -1, /* ar27-ar31 */
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SCRATCH(ccv),
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-1, -1, -1, /* ar33-ar35 */
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SPECIAL(unat),
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-1, -1, -1, /* ar37-ar39 */
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SPECIAL(fpsr),
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-1, -1, -1, -1, -1, -1, -1, /* ar41-ar47 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar48-ar55 */
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-1, -1, -1, -1, -1, -1, -1, -1, /* ar56-ar63 */
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SPECIAL(pfs)
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};
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static struct kgdb_frame_cache *
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kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
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{
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char buf[MAX_REGISTER_SIZE];
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struct kgdb_frame_cache *cache;
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cache = *this_cache;
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if (cache == NULL) {
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cache = FRAME_OBSTACK_ZALLOC(struct kgdb_frame_cache);
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*this_cache = cache;
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frame_unwind_register(next_frame, IA64_BSP_REGNUM, buf);
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cache->bsp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, IA64_BSP_REGNUM));
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cache->ip = frame_func_unwind(next_frame);
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frame_unwind_register(next_frame, SP_REGNUM, buf);
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cache->sp = extract_unsigned_integer(buf,
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register_size(current_gdbarch, SP_REGNUM));
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}
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return (cache);
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}
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static void
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kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
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struct frame_id *this_id)
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{
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struct kgdb_frame_cache *cache;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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*this_id = frame_id_build_special(cache->sp, cache->ip, cache->bsp);
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}
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static void
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@ -144,6 +233,61 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
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void **this_cache, int regnum, int *optimizedp, enum lval_type *lvalp,
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CORE_ADDR *addrp, int *realnump, void *valuep)
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{
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char buf[MAX_REGISTER_SIZE];
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char dummy_valuep[MAX_REGISTER_SIZE];
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struct kgdb_frame_cache *cache;
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CORE_ADDR bsp;
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int ofs, regsz;
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regsz = register_size(current_gdbarch, regnum);
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if (valuep == NULL)
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valuep = dummy_valuep;
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memset(valuep, 0, regsz);
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*optimizedp = 0;
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*addrp = 0;
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*lvalp = not_lval;
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*realnump = -1;
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cache = kgdb_trgt_frame_cache(next_frame, this_cache);
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if (regnum == IA64_BSP_REGNUM) {
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if (cache->saved_bsp == 0) {
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target_read_memory(cache->sp + 16 + SPECIAL(bspstore),
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buf, regsz);
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bsp = extract_unsigned_integer(buf, regsz);
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target_read_memory(cache->sp + 16 + SPECIAL(ndirty),
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buf, regsz);
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bsp += extract_unsigned_integer(buf, regsz);
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cache->saved_bsp = bsp;
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}
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store_unsigned_integer(valuep, regsz, cache->saved_bsp);
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return;
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}
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if (regnum == IA64_PR_REGNUM)
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ofs = SPECIAL(pr);
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else if (regnum == IA64_IP_REGNUM)
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ofs = SPECIAL(iip);
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else if (regnum == IA64_PSR_REGNUM)
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ofs = SPECIAL(psr);
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else if (regnum == IA64_CFM_REGNUM)
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ofs = SPECIAL(cfm);
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else if (regnum >= IA64_GR0_REGNUM && regnum <= IA64_GR31_REGNUM)
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ofs = kgdb_trgt_frame_ofs_gr[regnum - IA64_GR0_REGNUM];
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else if (regnum >= IA64_FR0_REGNUM && regnum <= IA64_FR15_REGNUM)
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ofs = kgdb_trgt_frame_ofs_fr[regnum - IA64_FR0_REGNUM];
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else if (regnum >= IA64_BR0_REGNUM && regnum <= IA64_BR7_REGNUM)
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ofs = kgdb_trgt_frame_ofs_br[regnum - IA64_BR0_REGNUM];
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else if (regnum >= IA64_RSC_REGNUM && regnum <= IA64_PFS_REGNUM)
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ofs = kgdb_trgt_frame_ofs_ar[regnum - IA64_RSC_REGNUM];
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else
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ofs = -1;
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if (ofs == -1)
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return;
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*addrp = cache->sp + 16 + ofs;
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*lvalp = lval_memory;
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target_read_memory(*addrp, valuep, regsz);
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}
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static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
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@ -155,6 +299,16 @@ static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
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const struct frame_unwind *
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kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
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{
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char *pname;
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CORE_ADDR ip;
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return (NULL);
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ip = frame_func_unwind(next_frame);
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pname = NULL;
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find_pc_partial_function(ip, &pname, NULL, NULL);
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if (pname == NULL)
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return (NULL);
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if (strncmp(pname, "ivt_", 4) == 0)
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return (&kgdb_trgt_trapframe_unwind);
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/* printf("%s: %lx =%s\n", __func__, ip, pname); */
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return (NULL);
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}
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