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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * @OSF_COPYRIGHT@
- */
- /*
- * HISTORY
- *
- * Revision 1.1.1.1 1998/09/22 21:05:49 wsanchez
- * Import of Mac OS X kernel (~semeria)
- *
- * Revision 1.1.1.1 1998/03/07 02:26:08 wsanchez
- * Import of OSF Mach kernel (~mburg)
- *
- * Revision 1.1.7.1 1997/09/22 17:41:24 barbou
- * MP+RT: protect cpu_number() usage against preemption.
- * [97/09/16 barbou]
- *
- * Revision 1.1.5.1 1995/01/06 19:53:37 devrcs
- * mk6 CR668 - 1.3b26 merge
- * new file for mk6
- * [1994/10/12 22:25:20 dwm]
- *
- * Revision 1.1.2.2 1994/05/16 19:19:17 meissner
- * Add support for converting 64-bit integers to a decimal string.
- * Use the correct address (selfpc) when creating the prof header for gprof.
- * [1994/04/28 21:44:59 meissner]
- *
- * Revision 1.1.2.1 1994/04/08 17:51:42 meissner
- * Make most stats 64 bits, except for things like memory allocation.
- * [1994/04/02 14:58:21 meissner]
- *
- * Do not provide old mcount support under MK or server.
- * Fixup stats size so it is the same as in profile-md.h.
- * [1994/03/29 21:00:03 meissner]
- *
- * Use faster sequence for overflow addition.
- * Keep {dummy,prof,gprof,old}_mcount counts in double precision.
- * Add kernel NCPUS > 1 support.
- * [1994/03/17 20:13:23 meissner]
- *
- * Add gprof/prof overflow support
- * [1994/03/17 14:56:44 meissner]
- *
- * Add size of histogram counters & unused fields to profile_profil struct
- * [1994/02/17 21:41:44 meissner]
- *
- * Add too_low/too_high to profile_stats.
- * [1994/02/16 22:38:11 meissner]
- *
- * Bump # allocation contexts to 32 from 16.
- * Store unique ptr address in gprof function header structure for _profile_reset.
- * Add new fields from profile-{internal,md}.h.
- * Align loop looking for an unlocked acontext.
- * Count # times a locked context block was found.
- * Expand copyright.
- * [1994/02/07 12:40:56 meissner]
- *
- * Keep track of the number of times the kernel overflows the HISTCOUNTER counter.
- * [1994/02/03 20:13:23 meissner]
- *
- * Add stats for {user,kernel,idle} mode in the kernel.
- * [1994/02/03 15:17:22 meissner]
- *
- * No change.
- * [1994/02/03 00:58:49 meissner]
- *
- * Combine _profile_{vars,stats,md}; Allow more than one _profile_vars.
- * [1994/02/01 12:03:56 meissner]
- *
- * Move _mcount_ptr to be closer to other data declarations.
- * Add text_len to profile_profil structure for mk.
- * Split records_cnt into prof_cnt/gprof_cnt.
- * Always update prof_cnt/gprof_cnt even if not DO_STATS.
- * Add current/max cpu indicator to stats for kernel.
- * [1994/01/28 23:33:20 meissner]
- *
- * Don't do 4+Lgotoff(lab), use separate labels.
- * Change GPROF_HASH_SHIFT to 9 (from 8).
- * [1994/01/26 22:00:59 meissner]
- *
- * Fixup NO_RECURSIVE_ALLOC to do byte loads, not word loads.
- * [1994/01/26 20:30:57 meissner]
- *
- * Move callback pointers into separate allocation context.
- * Add size fields for other structures to profile-vars.
- * Allocate string table as one large allocation.
- * Rewrite old mcount code once again.
- * Use multiply to make hash value, not divide.
- * Hash table is now a power of two.
- * [1994/01/26 20:23:32 meissner]
- *
- * Cut hash table size back to 16189.
- * Add size fields to all structures.
- * Add major/minor version number to _profile_md.
- * Move allocation context block pointers to _profile_vars.
- * Move _gprof_dummy after _profile_md.
- * New function header code now falls into hash an element
- * to avoid having the hash code duplicated or use a macro.
- * Fix bug in _gprof_mcount with ELF shared libraries.
- * [1994/01/25 01:45:59 meissner]
- *
- * Move init functions to C code; rearrange profil varaibles.
- * [1994/01/22 01:11:14 meissner]
- *
- * No change.
- * [1994/01/20 20:56:43 meissner]
- *
- * Fixup copyright.
- * [1994/01/18 23:07:39 meissner]
- *
- * Make flags byte-sized.
- * Add have_bb flag.
- * Add init_format flag.
- * Always put word size multipler first in .space.
- * [1994/01/18 21:57:14 meissner]
- *
- * Fix elfpic problems in last change.
- * [1994/01/16 14:04:26 meissner]
- *
- * Rewrite gprof caching to be faster & not need a lock.
- * Record prof information for gprof too.
- * Bump reserved stats to 64.
- * Bump up hash table size 30799.
- * Conditionally use lock prefix.
- * Change most #ifdef's to #if.
- * DEBUG_PROFILE turns on stack frames now.
- * Conditionally add externs to gprof to determine where time is spent.
- * Prof_mcount uses xchgl to update function pointer.
- * [1994/01/15 18:40:33 meissner]
- *
- * Fix a comment.
- * Separate statistics from debugging (though debugging turns it on).
- * Remove debug code that traces each gprof request.
- * [1994/01/15 00:59:02 meissner]
- *
- * Move max hash bucket calculation into _gprof_write & put info in stats structure.
- * [1994/01/04 16:15:14 meissner]
- *
- * Use _profile_printf to write diagnostics; add diag_stream to hold stream to write to.
- * [1994/01/04 15:37:44 meissner]
- *
- * Add more allocation memory pools (gprof function hdrs in particular).
- * For prof, gprof arc, and gprof function hdrs, allocate 16 pages at a time.
- * Add major/minor version numbers to _profile_{vars,stats}.
- * Add # profil buckets field to _profil_stats.
- * [19
- *
- * $EndLog$
- */
-
- /*
- * Common 386 profiling module that is shared between the kernel, mach
- * servers, and the user space library. Each environment includes
- * this file.
- */
-
- .file "profile-asm.s"
-
- #include <cpus.h>
-
- #include <machine/asm.h>
-
- /*
- * By default, debugging turns on statistics and stack frames.
- */
-
- #if DEBUG_PROFILE
- #ifndef DO_STATS
- #define DO_STATS 1
- #endif
-
- #ifndef STACK_FRAMES
- #define STACK_FRAMES 1
- #endif
- #endif
-
- #ifndef OLD_MCOUNT
- #define OLD_MCOUNT 0 /* do not compile old code for mcount */
- #endif
-
- #ifndef DO_STATS
- #define DO_STATS 1 /* compile in statistics code */
- #endif
-
- #ifndef DO_LOCK
- #define DO_LOCK 0 /* use lock; in front of increments */
- #endif
-
- #ifndef LOCK_STATS
- #define LOCK_STATS DO_LOCK /* update stats with lock set */
- #endif
-
- #ifndef STACK_FRAMES
- #define STACK_FRAMES 0 /* create stack frames for debugger */
- #endif
-
- #ifndef NO_RECURSIVE_ALLOC
- #define NO_RECURSIVE_ALLOC 0 /* check for recursive allocs */
- /* (not thread safe!) */
- #endif
-
- #ifndef MARK_GPROF
- #define MARK_GPROF 0 /* add externs for gprof profiling */
- #endif
-
- #ifndef OVERFLOW
- #define OVERFLOW 1 /* add overflow checking support */
- #endif
-
- /*
- * Turn on the use of the lock prefix if desired.
- */
-
- #ifndef LOCK
- #if DO_LOCK
- #define LOCK lock;
- #else
- #define LOCK
- #endif
- #endif
-
- #ifndef SLOCK
- #if LOCK_STATS
- #define SLOCK LOCK
- #else
- #define SLOCK
- #endif
- #endif
-
- /*
- * Double or single precision incrementing
- */
-
- #if OVERFLOW
- #define DINC(mem) LOCK addl $1,mem; LOCK adcl $0,4+mem
- #define DINC2(mem,mem2) LOCK addl $1,mem; LOCK adcl $0,mem2
- #define SDINC(mem) SLOCK addl $1,mem; SLOCK adcl $0,4+mem
- #define SDADD(val,mem) SLOCK addl val,mem; SLOCK adcl $0,4+mem
- #define SDADDNEG(val,mem) SLOCK subl val,mem; SLOCK adcl $0,4+mem
- #define SDSUB(val,mem) SLOCK subl val,mem; SLOCK sbbl $0,4+mem
-
- #else
- #define DINC(mem) LOCK incl mem
- #define DINC2(mem,mem2) LOCK incl mem
- #define SDINC(mem) SLOCK incl mem
- #define SDADD(val,mem) SLOCK addl val,mem
- #define SDADDNEG(val,mem) SLOCK subl val,mem
- #define SDSUB(val,mem) SLOCK subl val,mem
- #endif
-
- /*
- * Stack frame support so that debugger traceback works.
- */
-
- #if STACK_FRAMES
- #define ENTER pushl %ebp; movl %esp,%ebp
- #define LEAVE0 popl %ebp
- #define Estack 4
- #else
- #define ENTER
- #define LEAVE0
- #define Estack 0
- #endif
-
- /*
- * Gprof profiling.
- */
-
- #if MARK_GPROF
- #define MARK(name) .globl EXT(name); ELF_FUNC(EXT(name)); ELF_SIZE(EXT(name),0); LEXT(name)
- #else
- #define MARK(name)
- #endif
-
- /*
- * Profiling allocation context block. Each time memory is needed, the
- * allocator loops until it finds an unlocked context block, and allocates
- * from that block. If no context blocks are available, a new memory
- * pool is allocated, and added to the end of the chain.
- */
-
- LCL(A_next) = 0 /* next context block link (must be 0) */
- LCL(A_plist) = LCL(A_next)+4 /* head of page list for context block */
- LCL(A_lock) = LCL(A_plist)+4 /* lock word */
- LCL(A_size) = LCL(A_lock)+4 /* size of context block */
-
- #define A_next LCL(A_next)
- #define A_plist LCL(A_plist)
- #define A_lock LCL(A_lock)
- #define A_size LCL(A_size)
-
- /*
- * Allocation contexts used.
- */
-
- LCL(C_prof) = 0 /* prof records */
- LCL(C_gprof) = 1 /* gprof arc records */
- LCL(C_gfunc) = 2 /* gprof function headers */
- LCL(C_misc) = 3 /* misc. allocations */
- LCL(C_profil) = 4 /* memory for profil */
- LCL(C_dci) = 5 /* memory for dci */
- LCL(C_bb) = 6 /* memory for basic blocks */
- LCL(C_callback) = 7 /* memory for callbacks */
- LCL(C_max) = 32 /* # allocation contexts */
-
- #define C_prof LCL(C_prof)
- #define C_gprof LCL(C_gprof)
- #define C_gfunc LCL(C_gfunc)
- #define C_max LCL(C_max)
-
- /*
- * Linked list of memory allocations.
- */
-
- LCL(M_first) = 0 /* pointer to first byte available */
- LCL(M_ptr) = LCL(M_first)+4 /* pointer to next available byte */
- LCL(M_next) = LCL(M_ptr)+4 /* next page allocated */
- LCL(M_nfree) = LCL(M_next)+4 /* # bytes available */
- LCL(M_nalloc) = LCL(M_nfree)+4 /* # bytes allocated */
- LCL(M_num) = LCL(M_nalloc)+4 /* # allocations done on this page */
- LCL(M_size) = LCL(M_num)+4 /* size of page header */
-
- #define M_first LCL(M_first)
- #define M_ptr LCL(M_ptr)
- #define M_next LCL(M_next)
- #define M_nfree LCL(M_nfree)
- #define M_nalloc LCL(M_nalloc)
- #define M_num LCL(M_num)
- #define M_size LCL(M_size)
-
- /*
- * Prof data type.
- */
-
- LCL(P_addr) = 0 /* function address */
- LCL(P_count) = LCL(P_addr)+4 /* # times function called */
- LCL(P_overflow) = LCL(P_count)+4 /* # times count overflowed */
- LCL(P_size) = LCL(P_overflow)+4 /* size of prof data type */
-
- #define P_addr LCL(P_addr)
- #define P_count LCL(P_count)
- #define P_overflow LCL(P_overflow)
- #define P_size LCL(P_size)
-
- /*
- * Gprof data type.
- */
-
- LCL(G_next) = 0 /* next hash link (must be 0) */
- LCL(G_frompc) = LCL(G_next)+4 /* caller's caller */
- LCL(G_selfpc) = LCL(G_frompc)+4 /* caller's address */
- LCL(G_count) = LCL(G_selfpc)+4 /* # times arc traversed */
- LCL(G_overflow) = LCL(G_count)+4 /* # times count overflowed */
- LCL(G_size) = LCL(G_overflow)+4 /* size of gprof data type */
-
- #define G_next LCL(G_next)
- #define G_frompc LCL(G_frompc)
- #define G_selfpc LCL(G_selfpc)
- #define G_count LCL(G_count)
- #define G_overflow LCL(G_overflow)
- #define G_size LCL(G_size)
-
- /*
- * Gprof header.
- *
- * At least one header is allocated for each unique function that is profiled.
- * In order to save time calculating the hash value, the last H_maxcache
- * distinct arcs are cached within this structure. Also, to avoid loading
- * the GOT when searching the hash table, we copy the hash pointer to this
- * structure, so that we only load the GOT when we need to allocate an arc.
- */
-
- LCL(H_maxcache) = 3 /* # of cache table entries */
- LCL(H_csize) = 4*LCL(H_maxcache) /* size of each cache array */
-
- LCL(H_hash_ptr) = 0 /* hash table to use */
- LCL(H_unique_ptr) = LCL(H_hash_ptr)+4 /* function unique pointer */
- LCL(H_prof) = LCL(H_unique_ptr)+4 /* prof statistics */
- LCL(H_cache_ptr) = LCL(H_prof)+P_size /* cache table of element pointers */
- LCL(H_size) = LCL(H_cache_ptr)+LCL(H_csize) /* size of gprof header type */
-
- #define H_maxcache LCL(H_maxcache)
- #define H_csize LCL(H_csize)
- #define H_hash_ptr LCL(H_hash_ptr)
- #define H_unique_ptr LCL(H_unique_ptr)
- #define H_prof LCL(H_prof)
- #define H_cache_ptr LCL(H_cache_ptr)
- #define H_size LCL(H_size)
-
- /*
- * Number of digits needed to write a 64 bit number including trailing null.
- * (rounded up to be divisable by 4).
- */
-
- #define N_digit 24
-
-
- .data
-
- /*
- * Default gprof hash table size, which must be a power of two.
- * The shift specifies how many low order bits to eliminate when
- * calculating the hash value.
- */
-
- #ifndef GPROF_HASH_SIZE
- #define GPROF_HASH_SIZE 16384
- #endif
-
- #ifndef GPROF_HASH_SHIFT
- #define GPROF_HASH_SHIFT 9
- #endif
-
- #define GPROF_HASH_MASK (GPROF_HASH_SIZE-1)
-
- DATA(_profile_hash_size)
- .long GPROF_HASH_SIZE
- ENDDATA(_profile_hash_size)
-
-
-
- /*
- * Pointer that the compiler uses to call to the appropriate mcount function.
- */
-
- DATA(_mcount_ptr)
- .long EXT(_dummy_mcount)
- ENDDATA(_mcount_ptr)
-
- /*
- * Global profile variables. The structure that accesses this in C is declared
- * in profile-internal.h. All items in .data that follow this will be used as
- * one giant record, and each unique machine, thread, kgmon output or what have
- * you will create a separate instance. Typically there is only one instance
- * which will be the memory laid out below.
- */
-
- LCL(var_major_version) = 0 /* major version number */
- LCL(var_minor_version) = LCL(var_major_version)+4 /* minor version number */
- LCL(vars_size) = LCL(var_minor_version)+4 /* size of _profile_vars structure */
- LCL(plist_size) = LCL(vars_size)+4 /* size of page_list structure */
- LCL(acontext_size) = LCL(plist_size)+4 /* size of allocation contexts */
- LCL(callback_size) = LCL(acontext_size)+4 /* size of callback structure */
- LCL(type) = LCL(callback_size)+4 /* profile type (gprof, prof) */
- LCL(error_msg) = LCL(type)+4 /* error message for perror */
- LCL(filename) = LCL(error_msg)+4 /* filename to write to */
- LCL(str_ptr) = LCL(filename)+4 /* string table pointer */
- LCL(stream) = LCL(str_ptr)+4 /* stdio stream to write to */
- LCL(diag_stream) = LCL(stream)+4 /* stdio stream to write diagnostics to */
- LCL(fwrite_func) = LCL(diag_stream)+4 /* function like fwrite to output bytes */
- LCL(page_size) = LCL(fwrite_func)+4 /* page size in bytes */
- LCL(str_bytes) = LCL(page_size)+4 /* # bytes in string table */
- LCL(str_total) = LCL(str_bytes)+4 /* # total bytes allocated for string table */
- LCL(clock_ticks) = LCL(str_total)+4 /* # clock ticks per second */
-
- /* profil variables */
- LCL(profil_start) = LCL(clock_ticks)+4 /* start of profil variables */
- LCL(lowpc) = LCL(clock_ticks)+4 /* lowest address */
- LCL(highpc) = LCL(lowpc)+4 /* highest address */
- LCL(text_len) = LCL(highpc)+4 /* highpc-lowpc */
- LCL(profil_len) = LCL(text_len)+4 /* size of profil buffer */
- LCL(counter_size) = LCL(profil_len)+4 /* size of indivual counter */
- LCL(scale) = LCL(counter_size)+4 /* scale factor */
- LCL(profil_unused) = LCL(scale)+4 /* unused fields */
- LCL(profil_end) = LCL(profil_unused)+4*8 /* end of profil_info structure */
- LCL(profil_buf) = LCL(profil_end) /* buffer for profil */
-
- /* Output selection func ptrs */
- LCL(output_init) = LCL(profil_buf)+4 /* Initialization */
- LCL(output) = LCL(output_init)+4 /* Write out profiling info */
- LCL(output_ptr) = LCL(output)+4 /* Output specific data ptr */
-
- /* Memory allocation support */
- LCL(acontext) = LCL(output_ptr)+4 /* pointers to allocation context blocks */
-
- LCL(bogus_func) = LCL(acontext)+4*C_max /* function to use if gprof arc is bad */
- LCL(vars_unused) = LCL(bogus_func)+4 /* future growth */
-
- /* flags */
- LCL(init) = LCL(vars_unused)+4*63 /* whether initializations were done */
- LCL(active) = LCL(init)+1 /* whether profiling is active */
- LCL(do_profile) = LCL(active)+1 /* whether to do profiling */
- LCL(use_dci) = LCL(do_profile)+1 /* whether to use DCI */
- LCL(use_profil) = LCL(use_dci)+1 /* whether to use profil */
- LCL(recursive_alloc) = LCL(use_profil)+1 /* alloc called recursively */
- LCL(output_uarea) = LCL(recursive_alloc)+1 /* output uarea */
- LCL(output_stats) = LCL(output_uarea)+1 /* output stats info */
- LCL(output_clock) = LCL(output_stats)+1 /* output the clock ticks */
- LCL(multiple_sections) = LCL(output_clock)+1 /* multiple sections are ok */
- LCL(have_bb) = LCL(multiple_sections)+1 /* whether we have basic block data */
- LCL(init_format) = LCL(have_bb)+1 /* The output format has been chosen */
- LCL(debug) = LCL(init_format)+1 /* Whether or not we are debugging */
- LCL(check_funcs) = LCL(debug)+1 /* Whether to check functions for validity */
- LCL(flag_unused) = LCL(check_funcs)+1 /* unused flags */
- LCL(end_of_vars) = LCL(flag_unused)+62 /* size of machine independent vars */
-
- /*
- * Data that contains profile statistics that can be dumped out
- * into the {,g}mon.out file. This is defined in profile-md.h.
- */
-
- LCL(stats_start) = LCL(end_of_vars) /* start of stats substructure */
- LCL(stats_major_version)= LCL(stats_start) /* major version number */
- LCL(stats_minor_version)= LCL(stats_major_version)+4 /* minor version number */
- LCL(stats_size) = LCL(stats_minor_version)+4 /* size of _profile_stats structure */
- LCL(profil_buckets) = LCL(stats_size)+4 /* # profil buckets */
- LCL(my_cpu) = LCL(profil_buckets)+4 /* identify which cpu/thread this is */
- LCL(max_cpu) = LCL(my_cpu)+4 /* identify which cpu/thread this is */
- LCL(prof_records) = LCL(max_cpu)+4 /* # of profiled functions */
- LCL(gprof_records) = LCL(prof_records)+4 /* # of gprof arcs created */
- LCL(hash_buckets) = LCL(gprof_records)+4 /* max gprof hash buckets on a chain */
- LCL(bogus_count) = LCL(hash_buckets)+4 /* # bogus functions found in gprof */
-
- LCL(cnt) = LCL(bogus_count)+4 /* # of _{prof,gprof}_mcount calls */
- LCL(dummy) = LCL(cnt)+8 /* # of _dummy_mcount calls */
- LCL(old_mcount) = LCL(dummy)+8 /* # of old mcount calls */
- LCL(hash_search) = LCL(old_mcount)+8 /* # gprof hash buckets searched */
- LCL(hash_num) = LCL(hash_search)+8 /* # times hash table searched */
- LCL(user_ticks) = LCL(hash_num)+8 /* # ticks within user space */
- LCL(kernel_ticks) = LCL(user_ticks)+8 /* # ticks within kernel space */
- LCL(idle_ticks) = LCL(kernel_ticks)+8 /* # ticks cpu was idle */
- LCL(overflow_ticks) = LCL(idle_ticks)+8 /* # ticks where histcounter overflowed */
- LCL(acontext_locked) = LCL(overflow_ticks)+8 /* # times an acontext was locked */
- LCL(too_low) = LCL(acontext_locked)+8 /* # times histogram tick too low */
- LCL(too_high) = LCL(too_low)+8 /* # times histogram tick too low */
- LCL(prof_overflow) = LCL(too_high)+8 /* # times the prof count field overflowed */
- LCL(gprof_overflow) = LCL(prof_overflow)+8 /* # times the gprof count field overflowed */
- LCL(num_alloc) = LCL(gprof_overflow)+8 /* # allocations in each context */
- LCL(bytes_alloc) = LCL(num_alloc)+4*C_max /* bytes allocated in each context */
- LCL(num_context) = LCL(bytes_alloc)+4*C_max /* # allocation context blocks */
- LCL(wasted) = LCL(num_context)+4*C_max /* # bytes wasted */
- LCL(overhead) = LCL(wasted)+4*C_max /* # bytes of overhead */
- LCL(buckets) = LCL(overhead)+4*C_max /* # hash indexes that have n buckets */
- LCL(cache_hits1) = LCL(buckets)+4*10 /* # gprof cache hits in bucket #1 */
- LCL(cache_hits2) = LCL(cache_hits1)+8 /* # gprof cache hits in bucket #2 */
- LCL(cache_hits3) = LCL(cache_hits2)+8 /* # gprof cache hits in bucket #3 */
- LCL(stats_unused) = LCL(cache_hits3)+8 /* reserved for future use */
- LCL(stats_end) = LCL(stats_unused)+8*64 /* end of stats structure */
-
- /*
- * Machine dependent variables that no C file should access (except for
- * profile-md.c).
- */
-
- LCL(md_start) = LCL(stats_end) /* start of md structure */
- LCL(md_major_version) = LCL(md_start) /* major version number */
- LCL(md_minor_version) = LCL(md_major_version)+4 /* minor version number */
- LCL(md_size) = LCL(md_minor_version)+4 /* size of _profile_stats structure */
- LCL(hash_ptr) = LCL(md_size)+4 /* gprof hash pointer */
- LCL(hash_size) = LCL(hash_ptr)+4 /* gprof hash size */
- LCL(num_cache) = LCL(hash_size)+4 /* # of cache entries */
- LCL(save_mcount_ptr) = LCL(num_cache)+4 /* save for mcount_ptr when suspending profiling */
- LCL(mcount_ptr_ptr) = LCL(save_mcount_ptr)+4 /* pointer to _mcount_ptr */
- LCL(dummy_ptr) = LCL(mcount_ptr_ptr)+4 /* pointer to gprof_dummy */
- LCL(alloc_pages) = LCL(dummy_ptr)+4 /* allocate more memory */
- LCL(num_buffer) = LCL(alloc_pages)+4 /* buffer to convert 64 bit ints in */
- LCL(md_unused) = LCL(num_buffer)+N_digit /* unused fields */
- LCL(md_end) = LCL(md_unused)+4*58 /* end of md structure */
- LCL(total_size) = LCL(md_end) /* size of entire structure */
-
- /*
- * Size of the entire _profile_vars structure.
- */
-
- DATA(_profile_size)
- .long LCL(total_size)
- ENDDATA(_profile_size)
-
- /*
- * Size of the statistics substructure.
- */
-
- DATA(_profile_stats_size)
- .long LCL(stats_end)-LCL(stats_start)
- ENDDATA(_profile_stats_size)
-
- /*
- * Size of the profil info substructure.
- */
-
- DATA(_profile_profil_size)
- .long LCL(profil_end)-LCL(profil_start)
- ENDDATA(_profile_profil_size)
-
- /*
- * Size of the machine dependent substructure.
- */
-
- DATA(_profile_md_size)
- .long LCL(md_end)-LCL(md_start)
- ENDDATA(_profile_profil_size)
-
- /*
- * Whether statistics are supported.
- */
-
- DATA(_profile_do_stats)
- .long DO_STATS
- ENDDATA(_profile_do_stats)
-
- .text
-
- /*
- * Map LCL(xxx) -> into simpler names
- */
-
- #define V_acontext LCL(acontext)
- #define V_acontext_locked LCL(acontext_locked)
- #define V_alloc_pages LCL(alloc_pages)
- #define V_bogus_func LCL(bogus_func)
- #define V_bytes_alloc LCL(bytes_alloc)
- #define V_cache_hits1 LCL(cache_hits1)
- #define V_cache_hits2 LCL(cache_hits2)
- #define V_cache_hits3 LCL(cache_hits3)
- #define V_cnt LCL(cnt)
- #define V_cnt_overflow LCL(cnt_overflow)
- #define V_check_funcs LCL(check_funcs)
- #define V_dummy LCL(dummy)
- #define V_dummy_overflow LCL(dummy_overflow)
- #define V_dummy_ptr LCL(dummy_ptr)
- #define V_gprof_records LCL(gprof_records)
- #define V_hash_num LCL(hash_num)
- #define V_hash_ptr LCL(hash_ptr)
- #define V_hash_search LCL(hash_search)
- #define V_mcount_ptr_ptr LCL(mcount_ptr_ptr)
- #define V_num_alloc LCL(num_alloc)
- #define V_num_buffer LCL(num_buffer)
- #define V_num_context LCL(num_context)
- #define V_old_mcount LCL(old_mcount)
- #define V_old_mcount_overflow LCL(old_mcount_overflow)
- #define V_overhead LCL(overhead)
- #define V_page_size LCL(page_size)
- #define V_prof_records LCL(prof_records)
- #define V_recursive_alloc LCL(recursive_alloc)
- #define V_wasted LCL(wasted)
-
- /*
- * Loadup %ebx with the address of _profile_vars. On a multiprocessor, this
- * will loads up the appropriate machine's _profile_vars structure.
- * For ELF shared libraries, rely on the fact that we won't need a GOT,
- * except to load this pointer.
- */
-
- #if defined (MACH_KERNEL) && NCPUS > 1
- #define ASSEMBLER
- #if AT386
- #include <i386/AT386/mp.h>
- #endif
-
- #if SQT
- #include <i386/SQT/asm_macros.h>
- #endif
-
- #ifndef CPU_NUMBER
- #error "Cannot determine how to get CPU number"
- #endif
-
- #define Vload CPU_NUMBER(%ebx); movl EXT(_profile_vars_cpus)(,%ebx,4),%ebx
-
- #else /* not kernel or not multiprocessor */
- #define Vload Gload; Egaddr(%ebx,_profile_vars)
- #endif
-
-
- /*
- * Allocate some memory for profiling. This memory is guaranteed to
- * be zero.
- * %eax contains the memory size requested and will contain ptr on exit.
- * %ebx contains the address of the appropriate profile_vars structure.
- * %ecx is the number of the memory pool to allocate from (trashed on exit).
- * %edx is trashed.
- * %esi is preserved.
- * %edi is preserved.
- * %ebp is preserved.
- */
-
- Entry(_profile_alloc_asm)
- ENTER
- pushl %esi
- pushl %edi
-
- movl %ecx,%edi /* move context number to saved reg */
-
- #if NO_RECURSIVE_ALLOC
- movb $-1,%cl
- xchgb %cl,V_recursive_alloc(%ebx)
- cmpb $0,%cl
- je LCL(no_recurse)
-
- int $3
-
- .align ALIGN
- LCL(no_recurse):
- #endif
-
- leal V_acontext(%ebx,%edi,4),%ecx
-
- /* Loop looking for a free allocation context. */
- /* %eax = size, %ebx = vars addr, %ecx = ptr to allocation context to try */
- /* %edi = context number */
-
- .align ALIGN
- LCL(alloc_loop):
- movl %ecx,%esi /* save ptr in case no more contexts */
- movl A_next(%ecx),%ecx /* next context block */
- cmpl $0,%ecx
- je LCL(alloc_context) /* need to allocate a new context block */
-
- movl $-1,%edx
- xchgl %edx,A_lock(%ecx) /* %edx == 0 if context available */
-
- #if DO_STATS
- SDADDNEG(%edx,V_acontext_locked(%ebx)) /* increment counter if lock was held */
- #endif
-
- cmpl $0,%edx
- jne LCL(alloc_loop) /* go back if this context block is not available */
-
- /* Allocation context found (%ecx), now allocate. */
- movl A_plist(%ecx),%edx /* pointer to current block */
- cmpl $0,%edx /* first allocation? */
- je LCL(alloc_new)
-
- cmpl %eax,M_nfree(%edx) /* see if we have enough space */
- jl LCL(alloc_new) /* jump if not enough space */
-
- /* Allocate from local block (and common exit) */
- /* %eax = bytes to allocate, %ebx = GOT, %ecx = context, %edx = memory block */
- /* %edi = context number */
-
- .align ALIGN
- LCL(alloc_ret):
-
- #if DO_STATS
- SLOCK incl V_num_alloc(%ebx,%edi,4) /* update global counters */
- SLOCK addl %eax,V_bytes_alloc(%ebx,%edi,4)
- SLOCK subl %eax,V_wasted(%ebx,%edi,4)
- #endif
-
- movl M_ptr(%edx),%esi /* pointer return value */
- subl %eax,M_nfree(%edx) /* decrement bytes remaining */
- addl %eax,M_nalloc(%edx) /* increment bytes allocated */
- incl M_num(%edx) /* increment # allocations */
- addl %eax,M_ptr(%edx) /* advance pointer */
- movl $0,A_lock(%ecx) /* unlock context block */
- movl %esi,%eax /* return pointer */
-
- #if NO_RECURSIVE_ALLOC
- movb $0,V_recursive_alloc(%ebx)
- #endif
-
- popl %edi
- popl %esi
- LEAVE0
- ret /* return to the caller */
-
- /* Allocate space in whole number of pages */
- /* %eax = bytes to allocate, %ebx = vars address, %ecx = context */
- /* %edi = context number */
-
- .align ALIGN
- LCL(alloc_new):
- pushl %eax /* save regs */
- pushl %ecx
- movl V_page_size(%ebx),%edx
- addl $(M_size-1),%eax /* add in overhead size & subtract 1 */
- decl %edx /* page_size - 1 */
- addl %edx,%eax /* round up to whole number of pages */
- notl %edx
- andl %edx,%eax
- leal -M_size(%eax),%esi /* save allocation size */
- pushl %eax /* argument to _profile_alloc_pages */
- call *V_alloc_pages(%ebx) /* allocate some memory */
- addl $4,%esp /* pop off argument */
-
- #if DO_STATS
- SLOCK addl %esi,V_wasted(%ebx,%edi,4) /* udpate global counters */
- SLOCK addl $M_size,V_overhead(%ebx,%edi,4)
- #endif
-
- popl %ecx /* context block */
- movl %eax,%edx /* memory block pointer */
- movl %esi,M_nfree(%edx) /* # free bytes */
- addl $M_size,%eax /* bump past overhead */
- movl A_plist(%ecx),%esi /* previous memory block or 0 */
- movl %eax,M_first(%edx) /* first space available */
- movl %eax,M_ptr(%edx) /* current address available */
- movl %esi,M_next(%edx) /* next memory block allocated */
- movl %edx,A_plist(%ecx) /* update current page list */
- popl %eax /* user size request */
- jmp LCL(alloc_ret) /* goto common return code */
-
- /* Allocate a context header in addition to memory block header + data */
- /* %eax = bytes to allocate, %ebx = GOT, %esi = ptr to store context ptr */
- /* %edi = context number */
-
- .align ALIGN
- LCL(alloc_context):
- pushl %eax /* save regs */
- pushl %esi
- movl V_page_size(%ebx),%edx
- addl $(A_size+M_size-1),%eax /* add in overhead size & subtract 1 */
- decl %edx /* page_size - 1 */
- addl %edx,%eax /* round up to whole number of pages */
- notl %edx
- andl %edx,%eax
- leal -A_size-M_size(%eax),%esi /* save allocation size */
- pushl %eax /* argument to _profile_alloc_pages */
- call *V_alloc_pages(%ebx) /* allocate some memory */
- addl $4,%esp /* pop off argument */
-
- #if DO_STATS
- SLOCK incl V_num_context(%ebx,%edi,4) /* bump # context blocks */
- SLOCK addl %esi,V_wasted(%ebx,%edi,4) /* update global counters */
- SLOCK addl $(A_size+M_size),V_overhead(%ebx,%edi,4)
- #endif
-
- movl %eax,%ecx /* context pointer */
- leal A_size(%eax),%edx /* memory block pointer */
- movl %esi,M_nfree(%edx) /* # free bytes */
- addl $(A_size+M_size),%eax /* bump past overhead */
- movl %eax,M_first(%edx) /* first space available */
- movl %eax,M_ptr(%edx) /* current address available */
- movl $0,M_next(%edx) /* next memory block allocated */
- movl %edx,A_plist(%ecx) /* head of memory block list */
- movl $1,A_lock(%ecx) /* set lock */
- popl %esi /* ptr to store context block link */
- movl %ecx,%eax /* context pointer temp */
- xchgl %eax,A_next(%esi) /* link into chain */
- movl %eax,A_next(%ecx) /* add links in case of threading */
- popl %eax /* user size request */
- jmp LCL(alloc_ret) /* goto common return code */
-
- END(_profile_alloc_asm)
-
- /*
- * C callable version of the profile memory allocator.
- * extern void *_profile_alloc(struct profile_vars *, size_t, acontext_type_t);
- */
-
- Entry(_profile_alloc)
- ENTER
- pushl %ebx
- movl 12+Estack(%esp),%eax /* memory size */
- movl 8+Estack(%esp),%ebx /* provile_vars address */
- addl $3,%eax /* round up to word boundary */
- movl 16+Estack(%esp),%ecx /* which memory pool to allocate from */
- andl $0xfffffffc,%eax
- call EXT(_profile_alloc_asm)
- popl %ebx
- LEAVE0
- ret
- END(_profile_alloc)
-
-
- /*
- * Dummy mcount routine that just returns.
- *
- * +-------------------------------+
- * | |
- * | |
- * | caller's caller stack, |
- * | saved registers, params. |
- * | |
- * | |
- * +-------------------------------+
- * | caller's caller return addr. |
- * +-------------------------------+
- * esp --> | caller's return address |
- * +-------------------------------+
- *
- * edx --> function unqiue LCL
- */
-
- Entry(_dummy_mcount)
- ENTER
-
- #if DO_STATS
- pushl %ebx
- MP_DISABLE_PREEMPTION(%ebx)
- Vload
- SDINC(V_dummy(%ebx))
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret
- END(_dummy_mcount)
-
-
- /*
- * Entry point for System V based profiling, count how many times each function
- * is called. The function label is passed in %edx, and the top two words on
- * the stack are the caller's address, and the caller's return address.
- *
- * +-------------------------------+
- * | |
- * | |
- * | caller's caller stack, |
- * | saved registers, params. |
- * | |
- * | |
- * +-------------------------------+
- * | caller's caller return addr. |
- * +-------------------------------+
- * esp --> | caller's return address |
- * +-------------------------------+
- *
- * edx --> function unique label
- *
- * We don't worry about the possibility about two threads calling
- * the same function for the first time simulataneously. If that
- * happens, two records will be created, and one of the records
- * address will be stored in in the function unique label (which
- * is aligned by the compiler, so we don't have to watch out for
- * crossing page/cache boundaries).
- */
-
- Entry(_prof_mcount)
- ENTER
-
- #if DO_STATS
- pushl %ebx
- MP_DISABLE_PREEMPTION(%ebx)
- Vload
- SDINC(V_cnt(%ebx))
- #endif
-
- movl (%edx),%eax /* initialized? */
- cmpl $0,%eax
- je LCL(pnew)
-
- DINC2(P_count(%eax),P_overflow(%eax)) /* bump function count (double precision) */
-
- #if DO_STATS
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret
-
- .align ALIGN
- LCL(pnew):
-
- #if !DO_STATS
- pushl %ebx
- MP_DISABLE_PREEMPTION(%ebx)
- Vload
- #endif
-
- SLOCK incl V_prof_records(%ebx)
- pushl %edx
- movl $P_size,%eax /* allocation size */
- movl $C_prof,%ecx /* allocation pool */
- call EXT(_profile_alloc_asm) /* allocate a new record */
- popl %edx
-
- movl Estack+4(%esp),%ecx /* caller's address */
- movl %ecx,P_addr(%eax)
- movl $1,P_count(%eax) /* call count */
- xchgl %eax,(%edx) /* update function header */
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- LEAVE0
- ret
-
- END(_prof_mcount)
-
-
- /*
- * Entry point for BSD based graph profiling, count how many times each unique
- * call graph (caller + callee) is called. The function label is passed in
- * %edx, and the top two words on the stack are the caller's address, and the
- * caller's return address.
- *
- * +-------------------------------+
- * | |
- * | |
- * | caller's caller stack, |
- * | saved registers, params. |
- * | |
- * | |
- * +-------------------------------+
- * | caller's caller return addr. |
- * +-------------------------------+
- * esp --> | caller's return address |
- * +-------------------------------+
- *
- * edx --> function unqiue label
- *
- * We don't worry about the possibility about two threads calling the same
- * function simulataneously. If that happens, two records will be created, and
- * one of the records address will be stored in in the function unique label
- * (which is aligned by the compiler).
- *
- * By design, the gprof header is not locked. Each of the cache pointers is
- * always a valid pointer (possibily to a null record), and if another thread
- * comes in and modifies the pointer, it does so automatically with a simple store.
- * Since all arcs are in the hash table, the caches are just to avoid doing
- * a multiplication in the common case, and if they don't match, the arcs will
- * still be found.
- */
-
- Entry(_gprof_mcount)
-
- ENTER
- movl Estack+4(%esp),%ecx /* caller's caller address */
-
- #if DO_STATS
- pushl %ebx
- MP_DISABLE_PREEMPTION(%ebx)
- Vload
- SDINC(V_cnt(%ebx)) /* bump profile call counter (double int) */
- #endif
-
- movl (%edx),%eax /* Gprof header allocated? */
- cmpl $0,%eax
- je LCL(gnew) /* skip if first call */
-
- DINC2(H_prof+P_count(%eax),H_prof+P_overflow(%eax)) /* bump function count */
-
- /* See if this call arc is the same as the last time */
- MARK(_gprof_mcount_cache1)
- movl H_cache_ptr(%eax),%edx /* last arc searched */
- cmpl %ecx,G_frompc(%edx) /* skip if not equal */
- jne LCL(gcache2)
-
- /* Same as last time, increment and return */
-
- DINC2(G_count(%edx),G_overflow(%edx)) /* bump arc count */
-
- #if DO_STATS
- SDINC(V_cache_hits1(%ebx)) /* update counter */
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret
-
- /* Search second cache entry */
- /* %eax = gprof func header, %ebx = vars address if DO_STATS, %ecx = caller's caller */
- /* %edx = first arc searched */
- /* %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- MARK(_gprof_mcount_cache2)
- LCL(gcache2):
- pushl %esi /* get a saved register */
- movl H_cache_ptr+4(%eax),%esi /* 2nd arc to be searched */
- cmpl %ecx,G_frompc(%esi) /* skip if not equal */
- jne LCL(gcache3)
-
- /* Element found, increment, reset last arc searched and return */
-
- DINC2(G_count(%esi),G_overflow(%esi)) /* bump arc count */
-
- movl %esi,H_cache_ptr+0(%eax) /* swap 1st and 2nd cached arcs */
- popl %esi
- movl %edx,H_cache_ptr+4(%eax)
-
- #if DO_STATS
- SDINC(V_cache_hits2(%ebx)) /* update counter */
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret
-
- /* Search third cache entry */
- /* %eax = gprof func header, %ebx = vars address if DO_STATS, %ecx = caller's caller */
- /* %edx = first arc searched, %esi = second arc searched */
- /* %esi, %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- MARK(_gprof_mcount_cache3)
- LCL(gcache3):
- pushl %edi
- movl H_cache_ptr+8(%eax),%edi /* 3rd arc to be searched */
- cmpl %ecx,G_frompc(%edi) /* skip if not equal */
- jne LCL(gnocache)
-
- /* Element found, increment, reset last arc searched and return */
-
- DINC2(G_count(%edi),G_overflow(%edi)) /* bump arc count */
-
- movl %edi,H_cache_ptr+0(%eax) /* make this 1st cached arc */
- movl %esi,H_cache_ptr+8(%eax)
- movl %edx,H_cache_ptr+4(%eax)
- popl %edi
- popl %esi
-
- #if DO_STATS
- SDINC(V_cache_hits3(%ebx)) /* update counter */
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret
-
- /* No function context, allocate a new context */
- /* %ebx is the variables address if DO_STATS */
- /* %ecx is the caller's caller's address */
- /* %edx is the unique function pointer */
- /* %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- MARK(_gprof_mcount_new)
- LCL(gnew):
- pushl %esi
- pushl %edi
-
- #if !DO_STATS
- pushl %ebx /* Address of vars needed for alloc */
- MP_DISABLE_PREEMPTION(%ebx)
- Vload /* stats already loaded address */
- #endif
-
- SLOCK incl V_prof_records(%ebx)
- movl %edx,%esi /* save unique function ptr */
- movl %ecx,%edi /* and caller's caller address */
- movl $H_size,%eax /* memory block size */
- movl $C_gfunc,%ecx /* gprof function header memory pool */
- call EXT(_profile_alloc_asm)
-
- movl V_hash_ptr(%ebx),%ecx /* copy hash_ptr to func header */
- movl V_dummy_ptr(%ebx),%edx /* dummy cache entry */
- movl %ecx,H_hash_ptr(%eax)
- movl %edx,H_cache_ptr+0(%eax) /* store dummy cache ptrs */
- movl %edx,H_cache_ptr+4(%eax)
- movl %edx,H_cache_ptr+8(%eax)
- movl %esi,H_unique_ptr(%eax) /* remember function unique ptr */
- movl Estack+12(%esp),%ecx /* caller's address */
- movl $1,H_prof+P_count(%eax) /* function called once so far */
- movl %ecx,H_prof+P_addr(%eax) /* set up prof information */
- movl %eax,(%esi) /* update context block address */
- movl %edi,%ecx /* caller's caller address */
- movl %edx,%esi /* 2nd cached arc */
-
- #if !DO_STATS
- popl %ebx
- #endif
-
- /* Fall through to add element to the hash table. This may involve */
- /* searching a few hash table elements that don't need to be searched */
- /* since we have a new element, but it allows the hash table function */
- /* to be specified in only one place */
-
- /* Didn't find entry in cache, search the global hash table */
- /* %eax = gprof func header, %ebx = vars address if DO_STATS */
- /* %ecx = caller's caller */
- /* %edx, %esi = cached arcs that were searched */
- /* %edi, %esi, %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- MARK(_gprof_mcount_hash)
- LCL(gnocache):
-
- pushl %esi /* save 2nd arc searched */
- pushl %edx /* save 1st arc searched */
- movl %eax,%esi /* save gprof func header */
-
- #if DO_STATS
- SDINC(V_hash_num(%ebx))
- movl Estack+20(%esp),%edi /* caller's address */
- #else
- movl Estack+16(%esp),%edi /* caller's address */
- #endif
- movl %ecx,%eax /* caller's caller address */
- imull %edi,%eax /* multiply to get hash */
- movl H_hash_ptr(%esi),%edx /* hash pointer */
- shrl $GPROF_HASH_SHIFT,%eax /* eliminate low order bits */
- andl $GPROF_HASH_MASK,%eax /* mask to get hash value */
- leal 0(%edx,%eax,4),%eax /* pointer to hash bucket */
- movl %eax,%edx /* save hash bucket address */
-
- /* %eax = old arc, %ebx = vars address if DO_STATS, %ecx = caller's caller */
- /* %edx = hash bucket address, %esi = gfunc ptr, %edi = caller's addr */
- /* 2 old arcs, %edi, %esi, %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- LCL(ghash):
- movl G_next(%eax),%eax /* get next hash element */
- cmpl $0,%eax /* end of line? */
- je LCL(ghashnew) /* skip if allocate new hash */
-
- #if DO_STATS
- SDINC(V_hash_search(%ebx))
- #endif
-
- cmpl G_selfpc(%eax),%edi /* loop back if not one we want */
- jne LCL(ghash)
-
- cmpl G_frompc(%eax),%ecx /* loop back if not one we want */
- jne LCL(ghash)
-
- /* Found an entry, increment count, set up for caching, and return */
- /* %eax = arc, %ebx = vars address if DO_STATS, %esi = func header */
- /* 2 old arcs, %edi, %esi, %ebx if DO_STATS pushed on stack */
-
- DINC2(G_count(%eax),G_overflow(%eax)) /* bump arc count */
-
- popl %ecx /* previous 1st arc searched */
- movl %eax,H_cache_ptr+0(%esi) /* this element is now 1st arc */
- popl %edi /* previous 2nd arc searched */
- movl %ecx,H_cache_ptr+4(%esi) /* new 2nd arc to be searched */
- movl %edi,H_cache_ptr+8(%esi) /* new 3rd arc to be searched */
- popl %edi
- popl %esi
-
- #if DO_STATS
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret /* return to user */
-
- /* Allocate new arc */
- /* %eax = old arc, %ebx = vars address if DO_STATS, %ecx = caller's caller */
- /* %edx = hash bucket address, %esi = gfunc ptr, %edi = caller's addr */
- /* 2 old arcs, %edi, %esi, %ebx if DO_STATS pushed on stack */
-
- .align ALIGN
- MARK(_gprof_mcount_hashnew)
- LCL(ghashnew):
-
- #if !DO_STATS
- pushl %ebx /* load address of vars if we haven't */
- MP_DISABLE_PREEMPTION(%ebx)
- Vload /* already done so */
- #endif
-
- SLOCK incl V_gprof_records(%ebx)
- pushl %edx
- movl %ecx,%edi /* save caller's caller */
- movl $G_size,%eax /* arc size */
- movl $C_gprof,%ecx /* gprof memory pool */
- call EXT(_profile_alloc_asm)
- popl %edx
-
- movl $1,G_count(%eax) /* set call count */
- movl Estack+20(%esp),%ecx /* caller's address */
- movl %edi,G_frompc(%eax) /* caller's caller */
- movl %ecx,G_selfpc(%eax)
-
- #if !DO_STATS
- popl %ebx /* release %ebx if no stats */
- #endif
-
- movl (%edx),%ecx /* first hash bucket */
- movl %ecx,G_next(%eax) /* update link */
- movl %eax,%ecx /* copy for xchgl */
- xchgl %ecx,(%edx) /* add to hash linked list */
- movl %ecx,G_next(%eax) /* update in case list changed */
-
- popl %ecx /* previous 1st arc searched */
- popl %edi /* previous 2nd arc searched */
- movl %eax,H_cache_ptr+0(%esi) /* this element is now 1st arc */
- movl %ecx,H_cache_ptr+4(%esi) /* new 2nd arc to be searched */
- movl %edi,H_cache_ptr+8(%esi) /* new 3rd arc to be searched */
-
- popl %edi
- popl %esi
-
- #if DO_STATS
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- #endif
-
- LEAVE0
- ret /* return to user */
-
- END(_gprof_mcount)
-
-
- /*
- * This function assumes that neither the caller or it's caller
- * has not omitted the frame pointer in order to get the caller's
- * caller. The stack looks like the following at the time of the call:
- *
- * +-------------------------------+
- * | |
- * | |
- * | caller's caller stack, |
- * | saved registers, params. |
- * | |
- * | |
- * +-------------------------------+
- * | caller's caller return addr. |
- * +-------------------------------+
- * fp --> | previous frame pointer |
- * +-------------------------------+
- * | |
- * | caller's stack, saved regs, |
- * | params. |
- * | |
- * +-------------------------------+
- * sp --> | caller's return address |
- * +-------------------------------+
- *
- * Recent versions of the compiler put the address of the pointer
- * sized word in %edx. Previous versions did not, but this code
- * does not support them.
- */
-
- /*
- * Note that OSF/rose blew defining _mcount, since it prepends leading
- * underscores, and _mcount didn't have a second leading underscore. However,
- * some of the kernel/server functions 'know' that mcount has a leading
- * underscore, so we satisfy both camps.
- */
-
- #if OLD_MCOUNT
- .globl mcount
- .globl _mcount
- ELF_FUNC(mcount)
- ELF_FUNC(_mcount)
- .align FALIGN
- _mcount:
- mcount:
-
- pushl %ebx
- MP_DISABLE_PREEMPTION(%ebx)
- Vload
-
- #if DO_STATS
- SDINC(V_old_mcount(%ebx))
- #endif
-
- /* In calling the functions, we will actually leave 1 extra word on the */
- /* top of the stack, but generated code will not notice, since the function */
- /* uses a frame pointer */
-
- movl V_mcount_ptr_ptr(%ebx),%ecx /* address of mcount_ptr */
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- movl 4(%ebp),%eax /* caller's caller return address */
- xchgl %eax,(%esp) /* push & get return address */
- pushl %eax /* push return address */
- jmp *(%ecx) /* go to profile the function */
-
- End(mcount)
- End(_mcount)
- #endif
-
-
- #if !defined(KERNEL) && !defined(MACH_KERNEL)
-
- /*
- * Convert a 64-bit integer to a string.
- * Arg #1 is a pointer to a string (at least 24 bytes) or NULL
- * Arg #2 is the low part of the 64-bit integer.
- * Arg #3 is the high part of the 64-bit integer.
- */
-
- Entry(_profile_cnt_to_decimal)
- ENTER
- pushl %ebx
- pushl %esi
- pushl %edi
- movl Estack+16(%esp),%ebx /* pointer or null */
- movl Estack+20(%esp),%edi /* low part of number */
- movl $10,%ecx /* divisor */
- cmpl $0,%ebx /* skip if pointer ok */
- jne LCL(cvt_nonnull)
-
- MP_DISABLE_PREEMPTION(%ebx)
- Vload /* get _profile_vars address */
- leal V_num_buffer(%ebx),%ebx /* temp buffer to use */
-
- .align ALIGN
- LCL(cvt_nonnull):
- addl $(N_digit-1),%ebx /* point string at end */
- movb $0,0(%ebx) /* null terminate string */
-
- #if OVERFLOW
- movl Estack+24(%esp),%esi /* high part of number */
- cmpl $0,%esi /* any thing left in high part? */
- je LCL(cvt_low)
-
- .align ALIGN
- LCL(cvt_high):
- movl %esi,%eax /* calculate high/10 & high%10 */
- xorl %edx,%edx
- divl %ecx
- movl %eax,%esi
-
- movl %edi,%eax /* calculate (low + (high%10)*2^32) / 10 */
- divl %ecx
- movl %eax,%edi
-
- decl %ebx /* decrement string pointer */
- addl $48,%edx /* convert from 0..9 -> '0'..'9' */
- movb %dl,0(%ebx) /* store digit in string */
- cmpl $0,%esi /* any thing left in high part? */
- jne LCL(cvt_high)
-
- #endif /* OVERFLOW */
-
- .align ALIGN
- LCL(cvt_low):
- movl %edi,%eax /* get low part into %eax */
-
- .align ALIGN
- LCL(cvt_low2):
- xorl %edx,%edx /* 0 */
- divl %ecx /* calculate next digit */
- decl %ebx /* decrement string pointer */
- addl $48,%edx /* convert from 0..9 -> '0'..'9' */
- movb %dl,0(%ebx) /* store digit in string */
- cmpl $0,%eax /* any more digits to convert? */
- jne LCL(cvt_low2)
-
- movl %ebx,%eax /* return value */
- popl %edi
- popl %esi
- MP_ENABLE_PREEMPTION(%ebx)
- popl %ebx
- LEAVE0
- ret
-
- END(_profile_cnt_to_decimal)
-
- #endif
-