aboutsummaryrefslogtreecommitdiff
path: root/gcc/ada/tb-alvms.c
diff options
context:
space:
mode:
authorArnaud Charlet <charlet@gcc.gnu.org>2014-08-04 15:02:44 +0200
committerArnaud Charlet <charlet@gcc.gnu.org>2014-08-04 15:02:44 +0200
commit24d4b3d500200caae61f77924b4ebe1bd2b5e0be (patch)
treecb6541747ff86af28069e975fb55ae8015015976 /gcc/ada/tb-alvms.c
parent69fff50e08365770deca864efd7a904ac9eb25e0 (diff)
downloadgcc-24d4b3d500200caae61f77924b4ebe1bd2b5e0be.zip
gcc-24d4b3d500200caae61f77924b4ebe1bd2b5e0be.tar.gz
gcc-24d4b3d500200caae61f77924b4ebe1bd2b5e0be.tar.bz2
[multiple changes]
2014-08-04 Yannick Moy <moy@adacore.com> * sem_ch3.adb (Analyze_Object_Declaration): In GNATprove mode, do not generate two Itypes with the same name for an array definition. * sinfo.ads: Expand doc on GNATprove mode. 2014-08-04 Hristian Kirtchev <kirtchev@adacore.com> * exp_ch3.adb (Expand_Freeze_Record_Type): Set the finalization master and storage pool attributes on the root type of an anonymous access type. * exp_ch4.adb (Expand_N_Allocator): Set the finalization master and storage pool attributes on the root type of an anonymous access type. 2014-08-04 Arnaud Charlet <charlet@adacore.com> * exp_ch3.adb: Minor reformatting. * tb-alvms.c, tb-alvxw.c, tb-ivms.c: Removed. * tracebak.c: Remove use of above files. * gcc-interface/Makefile.in: Update dependencies. 2014-08-04 Pierre-Marie Derodat <derodat@adacore.com> * gcc-interface/utils.c (gnat_set_type_context): Also set the context for parallel types' TYPE_STUB_DECL. Do not change anything if the context is already set for them. (gnat_pushdecl): Update the comment for calls to gnat_set_type_context to mention parallel types. (add_parallel_type): When adding a context-less parallel type to a type that has a context, propagate the context from the latter type to the former. (process_deferred_decl_context): Call gnat_set_type_context rather than manually setting the type context. (build_unc_object_type): Call gnat_set_type_context on the template type. From-SVN: r213584
Diffstat (limited to 'gcc/ada/tb-alvms.c')
-rw-r--r--gcc/ada/tb-alvms.c395
1 files changed, 0 insertions, 395 deletions
diff --git a/gcc/ada/tb-alvms.c b/gcc/ada/tb-alvms.c
deleted file mode 100644
index 1fd837e..0000000
--- a/gcc/ada/tb-alvms.c
+++ /dev/null
@@ -1,395 +0,0 @@
-/****************************************************************************
- * *
- * GNAT RUN-TIME COMPONENTS *
- * *
- * T R A C E B A C K - A l p h a / V M S *
- * *
- * C Implementation File *
- * *
- * Copyright (C) 2003-2011, AdaCore *
- * *
- * GNAT is free software; you can redistribute it and/or modify it under *
- * terms of the GNU General Public License as published by the Free Soft- *
- * ware Foundation; either version 3, or (at your option) any later ver- *
- * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
- * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
- * or FITNESS FOR A PARTICULAR PURPOSE. *
- * *
- * As a special exception under Section 7 of GPL version 3, you are granted *
- * additional permissions described in the GCC Runtime Library Exception, *
- * version 3.1, as published by the Free Software Foundation. *
- * *
- * You should have received a copy of the GNU General Public License and *
- * a copy of the GCC Runtime Library Exception along with this program; *
- * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
- * <http://www.gnu.org/licenses/>. *
- * *
- * GNAT was originally developed by the GNAT team at New York University. *
- * Extensive contributions were provided by Ada Core Technologies Inc. *
- * *
- ****************************************************************************/
-
-
-/* Alpha VMS requires a special treatment due to the complexity of the ABI.
- What is here is along the lines of what the MD_FALLBACK_FRAME_STATE_FOR
- macro does for frame unwinding during exception propagation. This file is
- #included within tracebak.c in the appropriate case.
-
- Most of the contents is directed by the OpenVMS/Alpha Conventions (ABI)
- document, sections of which we will refer to as ABI-<section_number>. */
-
-#include <vms/pdscdef.h>
-#include <vms/libicb.h>
-#include <vms/chfctxdef.h>
-#include <vms/chfdef.h>
-
-/* A couple of items missing from the header file included above. */
-extern void * SYS$GL_CALL_HANDL;
-#define PDSC$M_BASE_FRAME (1 << 10)
-
-/* Registers are 64bit wide and addresses are 32bit wide on alpha-vms. */
-typedef void * ADDR;
-typedef unsigned long long REG;
-
-#define REG_AT(addr) (*(REG *)(addr))
-
-#define AS_REG(addr) ((REG)(unsigned long)(addr))
-#define AS_ADDR(reg) ((ADDR)(unsigned long)(reg))
-#define ADDR_IN(reg) (AS_ADDR(reg))
-
-/* The following structure defines the state maintained during the
- unwinding process. */
-typedef struct
-{
- ADDR pc; /* Address of the call insn involved in the chain. */
- ADDR sp; /* Stack Pointer at the time of this call. */
- ADDR fp; /* Frame Pointer at the time of this call. */
-
- /* The values above are fetched as saved REGisters on the stack. They are
- typed ADDR because this is what the values in those registers are. */
-
- /* Values of the registers saved by the functions in the chain,
- incrementally updated through consecutive calls to the "unwind" function
- below. */
- REG saved_regs [32];
-} frame_state_t;
-
-/* Shortcuts for saved_regs of specific interest:
-
- Frame Pointer is r29,
- Stack Pointer is r30,
- Return Address is r26,
- Procedure Value is r27.
-
- This is from ABI-3.1.1 [Integer Registers]. */
-
-#define saved_fpr saved_regs[29]
-#define saved_spr saved_regs[30]
-#define saved_rar saved_regs[26]
-#define saved_pvr saved_regs[27]
-
-/* Special values for saved_rar, used to control the overall unwinding
- process. */
-#define RA_UNKNOWN ((REG)~0)
-#define RA_STOP ((REG)0)
-
-/* We still use a number of macros similar to the ones for the generic
- __gnat_backtrace implementation. */
-#define PC_ADJUST 4
-#define STOP_FRAME (frame_state.saved_rar == RA_STOP)
-
-/* Compute Procedure Value from Frame Pointer value. This follows the rules
- in ABI-3.6.1 [Current Procedure]. */
-#define PV_FOR(FP) \
- (((FP) != 0) \
- ? (((REG_AT (FP) & 0x7) == 0) ? *(PDSCDEF **)(FP) : (PDSCDEF *)(FP)) : 0)
-
-
-/**********
- * unwind *
- **********/
-
-/* Helper for __gnat_backtrace.
-
- FS represents some call frame, identified by a pc and associated frame
- pointer in FS->pc and FS->fp. FS->saved_regs contains the state of the
- general registers upon entry in this frame. Of most interest in this set
- are the saved return address and frame pointer registers, which actually
- allow identifying the caller's frame.
-
- This routine "unwinds" the input frame state by adjusting it to eventually
- represent its caller's frame. The basic principle is to shift the fp and pc
- saved values into the current state, and then compute the corresponding new
- saved registers set.
-
- If the call chain goes through a signal handler, special processing is
- required when we process the kernel frame which has called the handler, to
- switch it to the interrupted context frame. */
-
-#define K_HANDLER_FRAME(fs) (PV_FOR ((fs)->fp) == SYS$GL_CALL_HANDL)
-
-static void unwind_regular_code (frame_state_t * fs);
-static void unwind_kernel_handler (frame_state_t * fs);
-
-void
-unwind (frame_state_t * fs)
-{
- /* Don't do anything if requested so. */
- if (fs->saved_rar == RA_STOP)
- return;
-
- /* Retrieve the values of interest computed during the previous
- call. PC_ADJUST gets us from the return address to the call insn
- address. */
- fs->pc = ADDR_IN (fs->saved_rar) - PC_ADJUST;
- fs->sp = ADDR_IN (fs->saved_spr);
- fs->fp = ADDR_IN (fs->saved_fpr);
-
- /* Unless we are able to determine otherwise, set the frame state's
- saved return address such that the unwinding process will stop. */
- fs->saved_rar = RA_STOP;
-
- /* Now we want to update fs->saved_regs to reflect the state of the caller
- of the procedure described by pc/fp.
-
- The condition to check for a special kernel frame which has called a
- signal handler is stated in ABI-6.7.1 [Signaler's Registers] : "The frame
- of the call to the handler can be identified by the return address of
- SYS$CALL_HANDL+4". We use the equivalent procedure value identification
- here because SYS$CALL_HANDL appears to be undefined. */
-
- if (K_HANDLER_FRAME (fs))
- unwind_kernel_handler (fs);
- else
- unwind_regular_code (fs);
-}
-
-/***********************
- * unwind_regular_code *
- ***********************/
-
-/* Helper for unwind, for the case of unwinding through regular code which
- is not a signal handler. */
-
-static void
-unwind_regular_code (frame_state_t * fs)
-{
- PDSCDEF * pv = PV_FOR (fs->fp);
-
- ADDR frame_base;
-
- /* Use the procedure value to unwind, in a way depending on the kind of
- procedure at hand. See ABI-3.3 [Procedure Representation] and ABI-3.4
- [Procedure Types]. */
-
- if (pv == 0
- || pv->pdsc$w_flags & PDSC$M_BASE_FRAME)
- return;
-
- frame_base
- = (pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP) ? fs->fp : fs->sp;
-
- switch (pv->pdsc$w_flags & 0xf)
- {
- case PDSC$K_KIND_FP_STACK:
- /* Stack Frame Procedure (ABI-3.4.1). Retrieve the necessary registers
- from the Register Save Area in the frame. */
- {
- ADDR rsa_base = frame_base + pv->pdsc$w_rsa_offset;
- int i, j;
-
- fs->saved_rar = REG_AT (rsa_base);
- fs->saved_pvr = REG_AT (frame_base);
-
- for (i = 0, j = 0; i < 32; i++)
- if (pv->pdsc$l_ireg_mask & (1 << i))
- fs->saved_regs[i] = REG_AT (rsa_base + 8 * ++j);
-
- /* Note that the loop above is guaranteed to set fs->saved_fpr,
- because "The preserved register set must always include R29(FP)
- since it will always be used." (ABI-3.4.3.4 [Register Save Area for
- All Stack Frames]).
-
- Also note that we need to run through all the registers to ensure
- that unwinding through register procedures (see below) gets the
- right values out of the saved_regs array. */
- }
- break;
-
- case PDSC$K_KIND_FP_REGISTER:
- /* Register Procedure (ABI-3.4.4). Retrieve the necessary registers from
- the registers where they have been saved. */
- {
- fs->saved_rar = fs->saved_regs[pv->pdsc$b_save_ra];
- fs->saved_fpr = fs->saved_regs[pv->pdsc$b_save_fp];
- }
- break;
-
- default:
- /* ??? Are we supposed to ever get here ? Don't think so. */
- break;
- }
-
- /* SP is actually never part of the saved registers area, so we use the
- corresponding entry in the saved_regs array to manually keep track of
- it's evolution. */
- fs->saved_spr = AS_REG (frame_base) + pv->pdsc$l_size;
-}
-
-/*************************
- * unwind_kernel_handler *
- *************************/
-
-/* Helper for unwind, for the specific case of unwinding through a signal
- handler.
-
- The input frame state describes the kernel frame which has called a signal
- handler. We fill the corresponding saved_regs to have it's "caller" frame
- represented as the interrupted context. */
-
-static void
-unwind_kernel_handler (frame_state_t * fs)
-{
- PDSCDEF * pv = PV_FOR (fs->fp);
-
- CHFDEF1 *sigargs;
- CHFDEF2 *mechargs;
-
- /* Retrieve the arguments passed to the handler, by way of a VMS service
- providing the corresponding "Invocation Context Block". */
- {
- long handler_ivhandle;
- INVO_CONTEXT_BLK handler_ivcb;
-
- CHFCTX *chfctx;
-
- handler_ivcb.libicb$q_ireg [29] = AS_REG (fs->fp);
- handler_ivcb.libicb$q_ireg [30] = 0;
-
- handler_ivhandle = LIB$GET_INVO_HANDLE (&handler_ivcb);
-
- if ((LIB$GET_INVO_CONTEXT (handler_ivhandle, &handler_ivcb) & 1) != 1)
- return;
-
- chfctx = (CHFCTX *) AS_ADDR (handler_ivcb.libicb$ph_chfctx_addr);
-
- sigargs = (CHFDEF1 *) AS_ADDR (chfctx->chfctx$q_sigarglst);
- mechargs = (CHFDEF2 *) AS_ADDR (chfctx->chfctx$q_mcharglst);
- }
-
- /* Compute the saved return address as the PC of the instruction causing the
- condition, accounting for the fact that it will be adjusted by the next
- call to "unwind" as if it was an actual call return address. */
- {
- /* ABI-6.5.1.1 [Signal Argument Vector]: The signal occurrence address
- is available from the sigargs argument to the handler, designed to
- support both 32 and 64 bit addresses. The initial reference we get
- is a pointer to the 32bit form, from which one may extract a pointer
- to the 64bit version if need be. We work directly from the 32bit
- form here. */
-
- /* The sigargs vector structure for 32bits addresses is:
-
- <......32bit......>
- +-----------------+
- | Vsize | :chf$is_sig_args
- +-----------------+ -+-
- | Condition Value | : [0]
- +-----------------+ :
- | ... | :
- +-----------------+ : vector of Vsize entries
- | Signal PC | :
- +-----------------+ :
- | PS | : [Vsize - 1]
- +-----------------+ -+-
-
- */
-
- unsigned long * sigargs_vector
- = ((unsigned long *) (&sigargs->chf$is_sig_args)) + 1;
-
- long sigargs_vsize
- = sigargs->chf$is_sig_args;
-
- fs->saved_rar = (REG) sigargs_vector [sigargs_vsize - 2] + PC_ADJUST;
- }
-
- fs->saved_spr = RA_UNKNOWN;
- fs->saved_fpr = (REG) mechargs->chf$q_mch_frame;
- fs->saved_pvr = (REG) mechargs->chf$q_mch_savr27;
-
- fs->saved_regs[16] = (REG) mechargs->chf$q_mch_savr16;
- fs->saved_regs[17] = (REG) mechargs->chf$q_mch_savr17;
- fs->saved_regs[18] = (REG) mechargs->chf$q_mch_savr18;
- fs->saved_regs[19] = (REG) mechargs->chf$q_mch_savr19;
- fs->saved_regs[20] = (REG) mechargs->chf$q_mch_savr20;
-}
-
-/* Structure representing a traceback entry in the tracebacks array to be
- filled by __gnat_backtrace below.
-
- !! This should match what is in System.Traceback_Entries, so beware of
- !! the REG/ADDR difference here.
-
- The use of a structure is motivated by the potential necessity of having
- several fields to fill for each entry, for instance if later calls to VMS
- system functions need more than just a mere PC to compute info on a frame
- (e.g. for non-symbolic->symbolic translation purposes). */
-typedef struct {
- ADDR pc; /* Program Counter. */
- ADDR pv; /* Procedure Value. */
-} tb_entry_t;
-
-/********************
- * __gnat_backtrace *
- ********************/
-
-int
-__gnat_backtrace (void **array, int size,
- void *exclude_min, void *exclude_max, int skip_frames)
-{
- int cnt;
-
- tb_entry_t * tbe = (tb_entry_t *)&array [0];
-
- frame_state_t frame_state;
-
- /* Setup the frame state before initiating the unwinding sequence. */
- register REG this_FP __asm__("$29");
- register REG this_SP __asm__("$30");
-
- frame_state.saved_fpr = this_FP;
- frame_state.saved_spr = this_SP;
- frame_state.saved_rar = RA_UNKNOWN;
-
- unwind (&frame_state);
-
- /* At this point frame_state describes this very function. Skip the
- requested number of calls. */
- for (cnt = 0; cnt < skip_frames; cnt ++)
- unwind (&frame_state);
-
- /* Now consider each frame as a potential candidate for insertion inside
- the provided array. */
- cnt = 0;
- while (cnt < size)
- {
- /* Stop if either the frame contents or the unwinder say so. */
- if (STOP_FRAME)
- break;
-
- if (! K_HANDLER_FRAME (&frame_state)
- && (frame_state.pc < exclude_min || frame_state.pc > exclude_max))
- {
- tbe->pc = (ADDR) frame_state.pc;
- tbe->pv = (ADDR) PV_FOR (frame_state.fp);
-
- cnt ++;
- tbe ++;
- }
-
- unwind (&frame_state);
- }
-
- return cnt;
-}