From 625559e74241061b25ed000c9d8d0e2e7735f810 Mon Sep 17 00:00:00 2001 From: Stu Grossman Date: Fri, 6 Oct 1995 21:51:20 +0000 Subject: [PATCH] * sparcl-stub.c: include sparclite.h to get access to register fondling macros. * (trap_low): Save and restore FP regs if necessary. Also, clean up save and restore of debug unit regs. * (hard_trap_info): Add more architecturally defined traps. * (set_debug_traps): Only set FP disabled trap if FP is disabled. * (get_in_break_mode): Clean up. Get rid of calls to set_hw_breakpoint_trap(). Also, use write_asi macro * (handle_exception): Clean up `g' and `G' commands. Add `P' command. * (hw_breakpoint): Why was this here!? It's gone now... --- gdb/ChangeLog | 14 +++ gdb/sparcl-stub.c | 282 ++++++++++++++++++++++++---------------------- 2 files changed, 160 insertions(+), 136 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 035e5179d80..20797a1a514 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,17 @@ +Fri Oct 6 14:43:19 1995 Stu Grossman (grossman@cygnus.com) + + * sparcl-stub.c: include sparclite.h to get access to register + fondling macros. + * (trap_low): Save and restore FP regs if necessary. Also, clean + up save and restore of debug unit regs. + * (hard_trap_info): Add more architecturally defined traps. + * (set_debug_traps): Only set FP disabled trap if FP is disabled. + * (get_in_break_mode): Clean up. Get rid of calls to + set_hw_breakpoint_trap(). Also, use write_asi macro + * (handle_exception): Clean up `g' and `G' commands. Add `P' + command. + * (hw_breakpoint): Why was this here!? It's gone now... + Fri Oct 6 11:56:49 1995 Jim Wilson * callback.c (fdbad): Fix typo in comment. diff --git a/gdb/sparcl-stub.c b/gdb/sparcl-stub.c index 8d581cf9fb0..7a435f35cf0 100644 --- a/gdb/sparcl-stub.c +++ b/gdb/sparcl-stub.c @@ -88,6 +88,7 @@ #include #include +#include /************************************************************************ * @@ -226,7 +227,7 @@ recursive_trap: std %i2, [%sp + (24 + 10) * 4] std %i4, [%sp + (24 + 12) * 4] std %i6, [%sp + (24 + 14) * 4] - ! F0->F31 not implemented + mov %y, %l4 mov %tbr, %l5 st %l4, [%sp + (24 + 64) * 4] ! Y @@ -235,50 +236,61 @@ recursive_trap: st %l5, [%sp + (24 + 67) * 4] ! TBR st %l1, [%sp + (24 + 68) * 4] ! PC st %l2, [%sp + (24 + 69) * 4] ! NPC - ! CPSR and FPSR not impl + or %l0, 0xf20, %l4 mov %l4, %psr ! Turn on traps, disable interrupts nop nop nop + + set 0x1000, %l1 + btst %l1, %l0 ! FP enabled? + be no_fpstore + nop + +! Must save fsr first, to flush the FQ. This may cause a deferred fp trap, so +! traps must be enabled to allow the trap handler to clean things up. + + st %fsr, [%sp + (24 + 70) * 4] + + std %f0, [%sp + (24 + 32) * 4] + std %f2, [%sp + (24 + 34) * 4] + std %f4, [%sp + (24 + 36) * 4] + std %f6, [%sp + (24 + 38) * 4] + std %f8, [%sp + (24 + 40) * 4] + std %f10, [%sp + (24 + 42) * 4] + std %f12, [%sp + (24 + 44) * 4] + std %f14, [%sp + (24 + 46) * 4] + std %f16, [%sp + (24 + 48) * 4] + std %f18, [%sp + (24 + 50) * 4] + std %f20, [%sp + (24 + 52) * 4] + std %f22, [%sp + (24 + 54) * 4] + std %f24, [%sp + (24 + 56) * 4] + std %f26, [%sp + (24 + 58) * 4] + std %f28, [%sp + (24 + 60) * 4] + std %f30, [%sp + (24 + 62) * 4] +no_fpstore: + call _get_in_break_mode nop - nop - nop - sethi %hi(0xff00), %l5 - or %l5, %lo(0xff00), %l5 - - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 72) * 4] ! DIA1, debug instr addr 1 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 73) * 4] ! DIA2, debug instr addr 2 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 74) * 4] ! DDA1, debug data addr 1 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 75) * 4] ! DDA2, debug data addr 2 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 76) * 4] ! DDV1, debug data val 1 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 77) * 4] ! DDV2, debug data val 2 - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 78) * 4] ! DCR, debug control reg - add %l5, 4, %l5 - lda [%l5]0x1, %l4 - st %l4, [%sp + (24 + 79) * 4] ! DSR, debug status reg - nop - nop - or %l0, 0xf20, %l4 - mov %l4, %psr ! Turn on traps, disable interrupts - nop - nop - nop + set 0xff00, %l3 + ldda [%l3]0x1, %l4 + std %l4, [%sp + (24 + 72) * 4] ! DIA1, debug instr addr 1 + ! DIA2, debug instr addr 2 + inc 8, %l3 + ldda [%l3]0x1, %l4 + std %l4, [%sp + (24 + 74) * 4] ! DDA1, debug data addr 1 + ! DDA2, debug data addr 2 + inc 8, %l3 + ldda [%l3]0x1, %l4 + std %l4, [%sp + (24 + 76) * 4] ! DDV1, debug data val 1 + ! DDV2, debug data val 2 + inc 8, %l3 + ldda [%l3]0x1, %l4 + std %l4, [%sp + (24 + 78) * 4] ! DCR, debug control reg + ! DSR, debug status reg + call _handle_exception add %sp, 24 * 4, %o0 ! Pass address of registers @@ -294,43 +306,53 @@ recursive_trap: ldd [%sp + (24 + 12) * 4], %i4 ldd [%sp + (24 + 14) * 4], %i6 - sethi %hi(0xff00), %l2 - or %l2, %lo(0xff00), %l2 - ldd [%sp + (24 + 72) * 4], %l4 ! DIA1, debug instr addr 1 - stda %l4, [%l2]0x1 - nop - nop - nop - nop - ldd [%sp + (24 + 74) * 4], %l4 ! DDA1, debug data addr 1 - add %l2, 8, %l2 - stda %l4, [%l2]0x1 - nop - nop - nop - nop - ldd [%sp + (24 + 76) * 4], %l4 ! DDV1, debug data value 1 - add %l2, 8, %l2 - stda %l4, [%l2]0x1 - nop - nop - nop - nop - ld [%sp + (24 + 78) * 4], %l4 ! DCR, debug control reg - ld [%sp + (24 + 79) * 4], %l5 ! DSR, debug control reg - add %l2, 8, %l2 - or %l4, 0x200, %l4 - sta %l4, [%l2]0x1 - add %l2, 4, %l2 - sta %l5, [%l2]0x1 - nop - nop - nop - nop + set 0xff00, %l2 + ldd [%sp + (24 + 72) * 4], %l4 + stda %l4, [%l2]0x1 ! DIA1, debug instr addr 1 + ! DIA2, debug instr addr 2 + inc 8, %l2 + ldd [%sp + (24 + 74) * 4], %l4 + stda %l4, [%l2]0x1 ! DDA1, debug data addr 1 + ! DDA2, debug data addr 2 + inc 8, %l2 + ldd [%sp + (24 + 76) * 4], %l4 + stda %l4, [%l2]0x1 ! DDV1, debug data value 1 + ! DDV2, debug data val 2 + inc 8, %l2 + ldd [%sp + (24 + 78) * 4], %l4 + bset 0x200, %l4 + stda %l4, [%l2]0x1 ! DCR, debug control reg + ! DSR, debug control reg + ldd [%sp + (24 + 64) * 4], %l0 ! Y & PSR ldd [%sp + (24 + 68) * 4], %l2 ! PC & NPC + set 0x1000, %l5 + btst %l5, %l1 ! FP enabled? + be no_fpreload + nop + + ldd [%sp + (24 + 32) * 4], %f0 + ldd [%sp + (24 + 34) * 4], %f2 + ldd [%sp + (24 + 36) * 4], %f4 + ldd [%sp + (24 + 38) * 4], %f6 + ldd [%sp + (24 + 40) * 4], %f8 + ldd [%sp + (24 + 42) * 4], %f10 + ldd [%sp + (24 + 44) * 4], %f12 + ldd [%sp + (24 + 46) * 4], %f14 + ldd [%sp + (24 + 48) * 4], %f16 + ldd [%sp + (24 + 50) * 4], %f18 + ldd [%sp + (24 + 52) * 4], %f20 + ldd [%sp + (24 + 54) * 4], %f22 + ldd [%sp + (24 + 56) * 4], %f24 + ldd [%sp + (24 + 58) * 4], %f26 + ldd [%sp + (24 + 60) * 4], %f28 + ldd [%sp + (24 + 62) * 4], %f30 + + ld [%sp + (24 + 70) * 4], %fsr +no_fpreload: + restore ! Ensure that previous window is valid save %g0, %g0, %g0 ! by causing a window_underflow trap @@ -541,16 +563,21 @@ static struct hard_trap_info unsigned char tt; /* Trap type code for SPARClite */ unsigned char signo; /* Signal that we map this trap into */ } hard_trap_info[] = { - {1, SIGSEGV}, /* instruction access error */ - {2, SIGILL}, /* privileged instruction */ - {3, SIGILL}, /* illegal instruction */ - {4, SIGEMT}, /* fp disabled */ - {36, SIGEMT}, /* cp disabled */ - {7, SIGBUS}, /* mem address not aligned */ - {9, SIGSEGV}, /* data access exception */ - {10, SIGEMT}, /* tag overflow */ - {128+1, SIGTRAP}, /* ta 1 - normal breakpoint instruction */ - {255, SIGTRAP}, /* hardware breakpoint */ + {0x01, SIGSEGV}, /* instruction access error */ + {0x02, SIGILL}, /* privileged instruction */ + {0x03, SIGILL}, /* illegal instruction */ + {0x04, SIGEMT}, /* fp disabled */ + {0x07, SIGBUS}, /* mem address not aligned */ + {0x09, SIGSEGV}, /* data access exception */ + {0x0a, SIGEMT}, /* tag overflow */ + {0x20, SIGBUS}, /* r register access error */ + {0x21, SIGBUS}, /* instruction access error */ + {0x24, SIGEMT}, /* cp disabled */ + {0x29, SIGBUS}, /* data access error */ + {0x2a, SIGFPE}, /* divide by zero */ + {0x2b, SIGBUS}, /* data store error */ + {0x80+1, SIGTRAP}, /* ta 1 - normal breakpoint instruction */ + {0xff, SIGTRAP}, /* hardware breakpoint */ {0, 0} /* Must be last */ }; @@ -561,8 +588,13 @@ set_debug_traps() { struct hard_trap_info *ht; - for (ht = hard_trap_info; ht->tt && ht->signo; ht++) - exceptionHandler(ht->tt, trap_low); +/* Only setup fp traps if the FP is disabled. */ + + for (ht = hard_trap_info; + ht->tt != 0 && ht->signo != 0; + ht++) + if (ht->tt != 4 || ! (read_psr () & 0x1000)) + exceptionHandler(ht->tt, trap_low); /* In case GDB is started before us, ack any packets (presumably "$?#xx") sitting there. */ @@ -613,32 +645,15 @@ _dummy_hw_breakpoint: "); static void -set_hw_breakpoint_trap(enable) - int enable; +get_in_break_mode() { extern void dummy_hw_breakpoint(); - if (enable) - exceptionHandler(255, dummy_hw_breakpoint); - else - exceptionHandler(255, trap_low); -} - -static void -get_in_break_mode() -{ - set_hw_breakpoint_trap(1); + exceptionHandler (255, dummy_hw_breakpoint); - asm(" - sethi %hi(0xff10), %l4 - or %l4, %lo(0xff10), %l4 - sta %g0, [%l4]0x1 - nop - nop - nop - "); + write_asi (1, 0xff10, 0); - set_hw_breakpoint_trap(0); + exceptionHandler (255, trap_low); } /* Convert the SPARC hardware trap type code to a unix signal number. */ @@ -732,13 +747,9 @@ handle_exception (registers) dsr = (unsigned long)registers[DSR]; if (dsr & 0x3c) - { - tt = 255; - } + tt = 255; else - { - tt = (registers[TBR] >> 4) & 0xff; - } + tt = (registers[TBR] >> 4) & 0xff; /* reply to host that an exception has occurred */ sigval = computeSignal(tt); @@ -801,33 +812,40 @@ handle_exception (registers) break; case 'g': /* return the value of the CPU registers */ - { - ptr = remcomOutBuffer; - ptr = mem2hex((char *)registers, ptr, 16 * 4, 0); /* G & O regs */ - ptr = mem2hex(sp + 0, ptr, 16 * 4, 0); /* L & I regs */ - memset(ptr, '0', 32 * 8); /* Floating point */ - ptr = mem2hex((char *)®isters[Y], - ptr + 32 * 4 * 2, - 8 * 4, - 0); /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ - mem2hex((char *)®isters[DIA1], ptr, - 8 * 4, 0); /* DIA1, DIA2, DDA1, DDA2, DDV1, DDV2, DCR, DSR */ - } + memcpy (®isters[L0], sp, 16 * 4); /* Copy L & I regs from stack */ + mem2hex ((char *)registers, remcomOutBuffer, NUMREGBYTES, 0); break; - case 'G': /* set the value of the CPU registers - return OK */ + case 'G': /* Set the value of all registers */ + case 'P': /* Set the value of one register */ { unsigned long *newsp, psr; psr = registers[PSR]; ptr = &remcomInBuffer[1]; - hex2mem(ptr, (char *)registers, 16 * 4, 0); /* G & O regs */ - hex2mem(ptr + 16 * 4 * 2, sp + 0, 16 * 4, 0); /* L & I regs */ - hex2mem(ptr + 64 * 4 * 2, (char *)®isters[Y], - 8 * 4, 0); /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */ - hex2mem(ptr + 72 * 4 * 2, (char *)®isters[DIA1], - 8 * 4, 0); /* DIA1, DIA2, DDA1, DDA2, DDV1, DDV2, DCR, DSR */ + + if (remcomInBuffer[0] == 'P') + { + int regno; + + if (hexToInt (&ptr, ®no) + && *ptr++ == '=') + if (regno >= L0 && regno <= I7) + hex2mem (ptr, sp + regno - L0, 4, 0); + else + hex2mem (ptr, (char *)®isters[regno], 4, 0); + else + { + strcpy (remcomOutBuffer, "P01"); + break; + } + } + else + { + hex2mem (ptr, (char *)registers, NUMREGBYTES, 0); + memcpy (sp, ®isters[L0], 16 * 4); /* Copy L & I regs to stack */ + } /* See if the stack pointer has moved. If so, then copy the saved locals and ins to the new location. This keeps the window @@ -974,11 +992,3 @@ breakpoint() _breakinst: ta 1 "); } - -static void -hw_breakpoint() -{ - asm(" - ta 127 - "); -} -- 2.30.2