diff options
| -rw-r--r-- | gdb/ChangeLog | 33 | ||||
| -rw-r--r-- | gdb/Makefile.in | 20 | ||||
| -rw-r--r-- | gdb/config/powerpc/aix.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/linux.mt | 3 | ||||
| -rw-r--r-- | gdb/config/powerpc/nbsd.mh | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/nbsd.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/ppc-eabi.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/ppc-sim.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/ppcle-eabi.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/ppcle-sim.mt | 2 | ||||
| -rw-r--r-- | gdb/config/powerpc/vxworks.mt | 2 | ||||
| -rw-r--r-- | gdb/ppc-linux-tdep.c | 328 | ||||
| -rw-r--r-- | gdb/ppc-sysv-tdep.c | 312 | ||||
| -rw-r--r-- | gdb/ppc-tdep.h | 4 | ||||
| -rw-r--r-- | gdb/ppcnbsd-nat.c | 2 | ||||
| -rw-r--r-- | gdb/rs6000-tdep.c | 165 |
16 files changed, 448 insertions, 435 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 01b1a5b..36d7038 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,36 @@ +2002-05-20 Jason Thorpe <thorpej@wasabisystems.com> + + * Makefile.in (ppc_tdep_h): Define. + (ppc-linux-nat.o) + (ppc-linux-tdep.o) + (rs6000-tdep.o): Use $(ppc_tdep_h). + (ppc-sysv-tdep.o) + (ppcnbsd-nat.o) + (ppcnbsd-tdep.o): New dependency lists. + * ppc-tdep.h: Use generic OS ABI framework. + * ppc-linux-tdep.c (_initialize_ppc_linux_tdep, + ppc_linux_init_abi): New functions. + (ppc_sysv_abi_broken_use_struct_convention) + (ppc_sysv_abi_use_struct_convention) + (ppc_sysv_abi_push_arguments): Move to... + * ppc-sysv-tdep.c: ...here. + * ppcnbsd-nat.c: Don't include gdbcore.h and regcache.h. + * rs6000-tdep.c (process_note_abi_tag_sections) + (get_elfosabi): Remove. + (rs6000_gdbarch_init): Use generic OS ABI framework. + (rs6000_dump_tdep): New function. + (_initialize_rs6000_tdep): Use gdbarch_register. + * config/powerpc/linux.mt (TDEPFILES): Add ppc-sysv-tdep.o. + * config/powerpc/nbsd.mh (NATDEPFILES): Remove solib-legacy.o. + * config/powerpc/aix.mt (TDEPFILES): Use ppc-sysv-tdep.o instead + of ppc-linux-tdep.o. + * config/powerpc/nbsd.mt (TDEPFILES): Likewise. + * config/powerpc/ppc-eabi.mt (TDEPFILES): Likewise. + * config/powerpc/ppc-sim.mt (TDEPFILES): Likewise. + * config/powerpc/ppcle-eabi.mt (TDEPFILES): Likewise. + * config/powerpc/ppcle-sim.mt (TDEPFILES): Likewise. + * config/powerpc/vxworks.mt (TDEPFILES): Likewise. + 2002-05-29 Jim Blandy <jimb@redhat.com> * macroscope.c (default_macro_scope): Put `void' in empty argument diff --git a/gdb/Makefile.in b/gdb/Makefile.in index c8dba91..57421b0 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -646,6 +646,7 @@ memattr_h = memattr.h monitor_h = monitor.h objfiles_h = objfiles.h parser_defs_h = parser-defs.h $(doublest_h) +ppc_tdep_h = ppc-tdep.h osabi.h regcache_h = regcache.h remote_h = remote.h remote_utils_h = remote-utils.h $(target_h) @@ -1226,7 +1227,8 @@ ALLDEPFILES = 29k-share/udi/udip2soc.c 29k-share/udi/udr.c \ nindy-share/ttyflush.c nindy-tdep.c \ ns32k-tdep.c solib-osf.c \ somread.c somsolib.c $(HPREAD_SOURCE) \ - ppc-linux-nat.c ppc-linux-tdep.c \ + ppc-sysv-tdep.o ppc-linux-nat.c ppc-linux-tdep.c \ + ppcnbsd-nat.o ppcnbsd-tdep.o \ procfs.c \ remote-adapt.c remote-array.c remote-bug.c remote-e7000.c remote-eb.c \ remote-es.c remote-hms.c remote-mips.c \ @@ -1901,10 +1903,20 @@ ppc-bdm.o: ppc-bdm.c $(defs_h) $(gdbcore_h) $(gdb_string_h) $(frame_h) \ $(objfiles_h) $(gdb_stabs_h) $(serial_h) ocd.h $(regcache_h) ppc-linux-nat.o: ppc-linux-nat.c $(defs_h) $(gdbcore_h) $(frame_h) \ - $(inferior_h) $(target_h) $(regcache_h) ppc-tdep.h + $(inferior_h) $(target_h) $(regcache_h) $(ppc_tdep_h) ppc-linux-tdep.o: ppc-linux-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \ - $(target_h) ppc-tdep.h $(regcache_h) $(value_h) + $(target_h) $(ppc_tdep_h) $(regcache_h) $(value_h) + +ppc-sysv-tdep.o: ppc-sysv-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \ + $(value_h) $(regcache_h) $(ppc_tdep_h) + +ppcnbsd-nat.o: ppcnbsd-nat.c $(defs_h) $(inferior_h) $(ppc_tdep_h) \ + ppcnbsd-tdep.h + +ppcnbsd-tdep.o: ppcnbsd-tdep.c $(defs_h) $(gdbcore_h) $(regcache_h) \ + $(target_h) $(breakpoint_h) $(value_h) $(ppc_tdep_t) ppcnbsd-tdep.h \ + nbsd-tdep.h ppcbug-rom.o: ppcbug-rom.c $(monitor_h) $(bfd_h) $(gdb_wait_h) $(defs_h) \ $(gdbcmd_h) $(inferior_h) $(target_h) $(serial_h) $(terminal_h) \ @@ -2041,7 +2053,7 @@ rs6000-nat.o: rs6000-nat.c $(bfd_h) $(defs_h) $(inferior_h) $(target_h) \ $(gdb_stabs_h) $(regcache_h) $(arch_utils_h) rs6000-tdep.o: rs6000-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \ - $(target_h) ppc-tdep.h $(regcache_h) $(value_h) $(parser_defs_h) + $(target_h) $(ppc_tdep_h) $(regcache_h) $(value_h) $(parser_defs_h) s390-tdep.o: s390-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) $(inferior_h) \ $(symtab_h) $(target_h) $(gdbcore_h) $(gdbcmd_h) $(symfile_h) \ diff --git a/gdb/config/powerpc/aix.mt b/gdb/config/powerpc/aix.mt index 706129a..d7ba624 100644 --- a/gdb/config/powerpc/aix.mt +++ b/gdb/config/powerpc/aix.mt @@ -1,3 +1,3 @@ # Target: PowerPC running AIX -TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o xcoffread.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-ppc-aix.h diff --git a/gdb/config/powerpc/linux.mt b/gdb/config/powerpc/linux.mt index 01160b9..a1d08c2 100644 --- a/gdb/config/powerpc/linux.mt +++ b/gdb/config/powerpc/linux.mt @@ -1,5 +1,6 @@ # Target: Motorola PPC on Linux -TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o solib-legacy.o +TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o ppc-sysv-tdep.o solib.o \ + solib-svr4.o solib-legacy.o TM_FILE= tm-linux.h SIM_OBS = remote-sim.o diff --git a/gdb/config/powerpc/nbsd.mh b/gdb/config/powerpc/nbsd.mh index 9d29986..26ba24d 100644 --- a/gdb/config/powerpc/nbsd.mh +++ b/gdb/config/powerpc/nbsd.mh @@ -1,3 +1,3 @@ # Host: PowerPC, running NetBSD -NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o solib-legacy.o +NATDEPFILES= fork-child.o infptrace.o inftarg.o ppcnbsd-nat.o NAT_FILE= nm-nbsd.h diff --git a/gdb/config/powerpc/nbsd.mt b/gdb/config/powerpc/nbsd.mt index cbf559b..d492f9d 100644 --- a/gdb/config/powerpc/nbsd.mt +++ b/gdb/config/powerpc/nbsd.mt @@ -1,5 +1,5 @@ # Target: PowerPC, running NetBSD -TDEPFILES= rs6000-tdep.o ppcnbsd-tdep.o nbsd-tdep.o ppc-linux-tdep.o corelow.o \ +TDEPFILES= rs6000-tdep.o ppc-sysv-tdep.o ppcnbsd-tdep.o nbsd-tdep.o corelow.o \ solib.o solib-svr4.o TM_FILE= tm-nbsd.h diff --git a/gdb/config/powerpc/ppc-eabi.mt b/gdb/config/powerpc/ppc-eabi.mt index 2d4a77f..5ef8cd9 100644 --- a/gdb/config/powerpc/ppc-eabi.mt +++ b/gdb/config/powerpc/ppc-eabi.mt @@ -1,3 +1,3 @@ # Target: PowerPC running eabi -TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-ppc-eabi.h diff --git a/gdb/config/powerpc/ppc-sim.mt b/gdb/config/powerpc/ppc-sim.mt index f2ad1f0..187bf39 100644 --- a/gdb/config/powerpc/ppc-sim.mt +++ b/gdb/config/powerpc/ppc-sim.mt @@ -1,5 +1,5 @@ # Target: PowerPC running eabi and including the simulator -TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-ppc-eabi.h SIM_OBS = remote-sim.o diff --git a/gdb/config/powerpc/ppcle-eabi.mt b/gdb/config/powerpc/ppcle-eabi.mt index e748097..ee05f16 100644 --- a/gdb/config/powerpc/ppcle-eabi.mt +++ b/gdb/config/powerpc/ppcle-eabi.mt @@ -1,3 +1,3 @@ # Target: PowerPC running eabi in little endian mode -TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-ppcle-eabi.h diff --git a/gdb/config/powerpc/ppcle-sim.mt b/gdb/config/powerpc/ppcle-sim.mt index 558c0dc..31cb900 100644 --- a/gdb/config/powerpc/ppcle-sim.mt +++ b/gdb/config/powerpc/ppcle-sim.mt @@ -1,5 +1,5 @@ # Target: PowerPC running eabi in little endian mode under the simulator -TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-ppcle-eabi.h SIM_OBS = remote-sim.o diff --git a/gdb/config/powerpc/vxworks.mt b/gdb/config/powerpc/vxworks.mt index ba6e17b..eca028f 100644 --- a/gdb/config/powerpc/vxworks.mt +++ b/gdb/config/powerpc/vxworks.mt @@ -1,3 +1,3 @@ # Target: Powerpc running VxWorks -TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o +TDEPFILES= rs6000-tdep.o ppc-sysv-tdep.o solib.o solib-svr4.o TM_FILE= tm-vxworks.h diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c index f358274..1a88d40 100644 --- a/gdb/ppc-linux-tdep.c +++ b/gdb/ppc-linux-tdep.c @@ -411,293 +411,6 @@ ppc_linux_frame_chain (struct frame_info *thisframe) return rs6000_frame_chain (thisframe); } -/* FIXME: Move the following to rs6000-tdep.c (or some other file where - it may be used generically by ports which use either the SysV ABI or - the EABI */ - -/* Until November 2001, gcc was not complying to the SYSV ABI for - returning structures less than or equal to 8 bytes in size. It was - returning everything in memory. When this was corrected, it wasn't - fixed for native platforms. */ -int -ppc_sysv_abi_broken_use_struct_convention (int gcc_p, struct type *value_type) -{ - if (TYPE_LENGTH (value_type) == 16 - && TYPE_VECTOR (value_type)) - return 0; - - return generic_use_struct_convention (gcc_p, value_type); -} - -/* Structures 8 bytes or less long are returned in the r3 & r4 - registers, according to the SYSV ABI. */ -int -ppc_sysv_abi_use_struct_convention (int gcc_p, struct type *value_type) -{ - if (TYPE_LENGTH (value_type) == 16 - && TYPE_VECTOR (value_type)) - return 0; - - return (TYPE_LENGTH (value_type) > 8); -} - -/* round2 rounds x up to the nearest multiple of s assuming that s is a - power of 2 */ - -#undef round2 -#define round2(x,s) ((((long) (x) - 1) & ~(long)((s)-1)) + (s)) - -/* Pass the arguments in either registers, or in the stack. Using the - ppc sysv ABI, the first eight words of the argument list (that might - be less than eight parameters if some parameters occupy more than one - word) are passed in r3..r10 registers. float and double parameters are - passed in fpr's, in addition to that. Rest of the parameters if any - are passed in user stack. - - If the function is returning a structure, then the return address is passed - in r3, then the first 7 words of the parametes can be passed in registers, - starting from r4. */ - -CORE_ADDR -ppc_sysv_abi_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_addr) -{ - int argno; - /* Next available general register for non-float, non-vector arguments. */ - int greg; - /* Next available floating point register for float arguments. */ - int freg; - /* Next available vector register for vector arguments. */ - int vreg; - int argstkspace; - int structstkspace; - int argoffset; - int structoffset; - struct value *arg; - struct type *type; - int len; - char old_sp_buf[4]; - CORE_ADDR saved_sp; - - greg = struct_return ? 4 : 3; - freg = 1; - vreg = 2; - argstkspace = 0; - structstkspace = 0; - - /* Figure out how much new stack space is required for arguments - which don't fit in registers. Unlike the PowerOpen ABI, the - SysV ABI doesn't reserve any extra space for parameters which - are put in registers. */ - for (argno = 0; argno < nargs; argno++) - { - arg = args[argno]; - type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (type); - - if (TYPE_CODE (type) == TYPE_CODE_FLT) - { - if (freg <= 8) - freg++; - else - { - /* SysV ABI converts floats to doubles when placed in - memory and requires 8 byte alignment */ - if (argstkspace & 0x4) - argstkspace += 4; - argstkspace += 8; - } - } - else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */ - { - if (greg > 9) - { - greg = 11; - if (argstkspace & 0x4) - argstkspace += 4; - argstkspace += 8; - } - else - { - if ((greg & 1) == 0) - greg++; - greg += 2; - } - } - else if (!TYPE_VECTOR (type)) - { - if (len > 4 - || TYPE_CODE (type) == TYPE_CODE_STRUCT - || TYPE_CODE (type) == TYPE_CODE_UNION) - { - /* Rounding to the nearest multiple of 8 may not be necessary, - but it is safe. Particularly since we don't know the - field types of the structure */ - structstkspace += round2 (len, 8); - } - if (greg <= 10) - greg++; - else - argstkspace += 4; - } - else - { - if (len == 16 - && TYPE_CODE (type) == TYPE_CODE_ARRAY - && TYPE_VECTOR (type)) - { - if (vreg <= 13) - vreg++; - else - { - /* Vector arguments must be aligned to 16 bytes on - the stack. */ - argstkspace += round2 (argstkspace, 16); - argstkspace += 16; - } - } - } - } - - /* Get current SP location */ - saved_sp = read_sp (); - - sp -= argstkspace + structstkspace; - - /* Allocate space for backchain and callee's saved lr */ - sp -= 8; - - /* Make sure that we maintain 16 byte alignment */ - sp &= ~0x0f; - - /* Update %sp before proceeding any further */ - write_register (SP_REGNUM, sp); - - /* write the backchain */ - store_address (old_sp_buf, 4, saved_sp); - write_memory (sp, old_sp_buf, 4); - - argoffset = 8; - structoffset = argoffset + argstkspace; - freg = 1; - greg = 3; - vreg = 2; - /* Fill in r3 with the return structure, if any */ - if (struct_return) - { - char val_buf[4]; - store_address (val_buf, 4, struct_addr); - memcpy (®isters[REGISTER_BYTE (greg)], val_buf, 4); - greg++; - } - /* Now fill in the registers and stack... */ - for (argno = 0; argno < nargs; argno++) - { - arg = args[argno]; - type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (type); - - if (TYPE_CODE (type) == TYPE_CODE_FLT) - { - if (freg <= 8) - { - if (len > 8) - printf_unfiltered ( - "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno); - memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + freg)], - VALUE_CONTENTS (arg), len); - freg++; - } - else - { - /* SysV ABI converts floats to doubles when placed in - memory and requires 8 byte alignment */ - /* FIXME: Convert floats to doubles */ - if (argoffset & 0x4) - argoffset += 4; - write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len); - argoffset += 8; - } - } - else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */ - { - if (greg > 9) - { - greg = 11; - if (argoffset & 0x4) - argoffset += 4; - write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len); - argoffset += 8; - } - else - { - if ((greg & 1) == 0) - greg++; - - memcpy (®isters[REGISTER_BYTE (greg)], - VALUE_CONTENTS (arg), 4); - memcpy (®isters[REGISTER_BYTE (greg + 1)], - VALUE_CONTENTS (arg) + 4, 4); - greg += 2; - } - } - else if (!TYPE_VECTOR (type)) - { - char val_buf[4]; - if (len > 4 - || TYPE_CODE (type) == TYPE_CODE_STRUCT - || TYPE_CODE (type) == TYPE_CODE_UNION) - { - write_memory (sp + structoffset, VALUE_CONTENTS (arg), len); - store_address (val_buf, 4, sp + structoffset); - structoffset += round2 (len, 8); - } - else - { - memset (val_buf, 0, 4); - memcpy (val_buf, VALUE_CONTENTS (arg), len); - } - if (greg <= 10) - { - memcpy (®isters[REGISTER_BYTE (greg)], val_buf, 4); - greg++; - } - else - { - write_memory (sp + argoffset, val_buf, 4); - argoffset += 4; - } - } - else - { - if (len == 16 - && TYPE_CODE (type) == TYPE_CODE_ARRAY - && TYPE_VECTOR (type)) - { - struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); - char *v_val_buf = alloca (16); - memset (v_val_buf, 0, 16); - memcpy (v_val_buf, VALUE_CONTENTS (arg), len); - if (vreg <= 13) - { - memcpy (®isters[REGISTER_BYTE (tdep->ppc_vr0_regnum - + vreg)], - v_val_buf, 16); - vreg++; - } - else - { - write_memory (sp + argoffset, v_val_buf, 16); - argoffset += 16; - } - } - } - } - - target_store_registers (-1); - return sp; -} - /* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint in much the same fashion as memory_remove_breakpoint in mem-break.c, but is careful not to write back the previous contents if the code @@ -886,3 +599,44 @@ ppc_linux_svr4_fetch_link_map_offsets (void) return lmp; } + +static void +ppc_linux_init_abi (struct gdbarch_info info, + struct gdbarch *gdbarch) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + /* Until November 2001, gcc was not complying to the SYSV ABI for + returning structures less than or equal to 8 bytes in size. It was + returning everything in memory. When this was corrected, it wasn't + fixed for native platforms. */ + set_gdbarch_use_struct_convention (gdbarch, + ppc_sysv_abi_broken_use_struct_convention); + + if (tdep->wordsize == 4) + { + /* Note: kevinb/2002-04-12: See note in rs6000_gdbarch_init regarding + *_push_arguments(). The same remarks hold for the methods below. */ + set_gdbarch_frameless_function_invocation (gdbarch, + ppc_linux_frameless_function_invocation); + set_gdbarch_frame_chain (gdbarch, ppc_linux_frame_chain); + set_gdbarch_frame_saved_pc (gdbarch, ppc_linux_frame_saved_pc); + + set_gdbarch_frame_init_saved_regs (gdbarch, + ppc_linux_frame_init_saved_regs); + set_gdbarch_init_extra_frame_info (gdbarch, + ppc_linux_init_extra_frame_info); + + set_gdbarch_memory_remove_breakpoint (gdbarch, + ppc_linux_memory_remove_breakpoint); + set_solib_svr4_fetch_link_map_offsets + (gdbarch, ppc_linux_svr4_fetch_link_map_offsets); + } +} + +void +_initialize_ppc_linux_tdep (void) +{ + gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_LINUX, + ppc_linux_init_abi); +} diff --git a/gdb/ppc-sysv-tdep.c b/gdb/ppc-sysv-tdep.c new file mode 100644 index 0000000..0d33683 --- /dev/null +++ b/gdb/ppc-sysv-tdep.c @@ -0,0 +1,312 @@ +/* Target-dependent code for PowerPC systems using the SVR4 ABI + for GDB, the GNU debugger. + + Copyright 2000, 2001, 2002 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "gdbcore.h" +#include "inferior.h" +#include "regcache.h" +#include "value.h" + +#include "ppc-tdep.h" + +/* round2 rounds x up to the nearest multiple of s assuming that s is a + power of 2 */ + +#undef round2 +#define round2(x,s) ((((long) (x) - 1) & ~(long)((s)-1)) + (s)) + +/* Pass the arguments in either registers, or in the stack. Using the + ppc sysv ABI, the first eight words of the argument list (that might + be less than eight parameters if some parameters occupy more than one + word) are passed in r3..r10 registers. float and double parameters are + passed in fpr's, in addition to that. Rest of the parameters if any + are passed in user stack. + + If the function is returning a structure, then the return address is passed + in r3, then the first 7 words of the parametes can be passed in registers, + starting from r4. */ + +CORE_ADDR +ppc_sysv_abi_push_arguments (int nargs, struct value **args, CORE_ADDR sp, + int struct_return, CORE_ADDR struct_addr) +{ + int argno; + /* Next available general register for non-float, non-vector arguments. */ + int greg; + /* Next available floating point register for float arguments. */ + int freg; + /* Next available vector register for vector arguments. */ + int vreg; + int argstkspace; + int structstkspace; + int argoffset; + int structoffset; + struct value *arg; + struct type *type; + int len; + char old_sp_buf[4]; + CORE_ADDR saved_sp; + + greg = struct_return ? 4 : 3; + freg = 1; + vreg = 2; + argstkspace = 0; + structstkspace = 0; + + /* Figure out how much new stack space is required for arguments + which don't fit in registers. Unlike the PowerOpen ABI, the + SysV ABI doesn't reserve any extra space for parameters which + are put in registers. */ + for (argno = 0; argno < nargs; argno++) + { + arg = args[argno]; + type = check_typedef (VALUE_TYPE (arg)); + len = TYPE_LENGTH (type); + + if (TYPE_CODE (type) == TYPE_CODE_FLT) + { + if (freg <= 8) + freg++; + else + { + /* SysV ABI converts floats to doubles when placed in + memory and requires 8 byte alignment */ + if (argstkspace & 0x4) + argstkspace += 4; + argstkspace += 8; + } + } + else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */ + { + if (greg > 9) + { + greg = 11; + if (argstkspace & 0x4) + argstkspace += 4; + argstkspace += 8; + } + else + { + if ((greg & 1) == 0) + greg++; + greg += 2; + } + } + else if (!TYPE_VECTOR (type)) + { + if (len > 4 + || TYPE_CODE (type) == TYPE_CODE_STRUCT + || TYPE_CODE (type) == TYPE_CODE_UNION) + { + /* Rounding to the nearest multiple of 8 may not be necessary, + but it is safe. Particularly since we don't know the + field types of the structure */ + structstkspace += round2 (len, 8); + } + if (greg <= 10) + greg++; + else + argstkspace += 4; + } + else + { + if (len == 16 + && TYPE_CODE (type) == TYPE_CODE_ARRAY + && TYPE_VECTOR (type)) + { + if (vreg <= 13) + vreg++; + else + { + /* Vector arguments must be aligned to 16 bytes on + the stack. */ + argstkspace += round2 (argstkspace, 16); + argstkspace += 16; + } + } + } + } + + /* Get current SP location */ + saved_sp = read_sp (); + + sp -= argstkspace + structstkspace; + + /* Allocate space for backchain and callee's saved lr */ + sp -= 8; + + /* Make sure that we maintain 16 byte alignment */ + sp &= ~0x0f; + + /* Update %sp before proceeding any further */ + write_register (SP_REGNUM, sp); + + /* write the backchain */ + store_address (old_sp_buf, 4, saved_sp); + write_memory (sp, old_sp_buf, 4); + + argoffset = 8; + structoffset = argoffset + argstkspace; + freg = 1; + greg = 3; + vreg = 2; + /* Fill in r3 with the return structure, if any */ + if (struct_return) + { + char val_buf[4]; + store_address (val_buf, 4, struct_addr); + memcpy (®isters[REGISTER_BYTE (greg)], val_buf, 4); + greg++; + } + /* Now fill in the registers and stack... */ + for (argno = 0; argno < nargs; argno++) + { + arg = args[argno]; + type = check_typedef (VALUE_TYPE (arg)); + len = TYPE_LENGTH (type); + + if (TYPE_CODE (type) == TYPE_CODE_FLT) + { + if (freg <= 8) + { + if (len > 8) + printf_unfiltered ( + "Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno); + memcpy (®isters[REGISTER_BYTE (FP0_REGNUM + freg)], + VALUE_CONTENTS (arg), len); + freg++; + } + else + { + /* SysV ABI converts floats to doubles when placed in + memory and requires 8 byte alignment */ + /* FIXME: Convert floats to doubles */ + if (argoffset & 0x4) + argoffset += 4; + write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len); + argoffset += 8; + } + } + else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */ + { + if (greg > 9) + { + greg = 11; + if (argoffset & 0x4) + argoffset += 4; + write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len); + argoffset += 8; + } + else + { + if ((greg & 1) == 0) + greg++; + + memcpy (®isters[REGISTER_BYTE (greg)], + VALUE_CONTENTS (arg), 4); + memcpy (®isters[REGISTER_BYTE (greg + 1)], + VALUE_CONTENTS (arg) + 4, 4); + greg += 2; + } + } + else if (!TYPE_VECTOR (type)) + { + char val_buf[4]; + if (len > 4 + || TYPE_CODE (type) == TYPE_CODE_STRUCT + || TYPE_CODE (type) == TYPE_CODE_UNION) + { + write_memory (sp + structoffset, VALUE_CONTENTS (arg), len); + store_address (val_buf, 4, sp + structoffset); + structoffset += round2 (len, 8); + } + else + { + memset (val_buf, 0, 4); + memcpy (val_buf, VALUE_CONTENTS (arg), len); + } + if (greg <= 10) + { + memcpy (®isters[REGISTER_BYTE (greg)], val_buf, 4); + greg++; + } + else + { + write_memory (sp + argoffset, val_buf, 4); + argoffset += 4; + } + } + else + { + if (len == 16 + && TYPE_CODE (type) == TYPE_CODE_ARRAY + && TYPE_VECTOR (type)) + { + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + char *v_val_buf = alloca (16); + memset (v_val_buf, 0, 16); + memcpy (v_val_buf, VALUE_CONTENTS (arg), len); + if (vreg <= 13) + { + memcpy (®isters[REGISTER_BYTE (tdep->ppc_vr0_regnum + + vreg)], + v_val_buf, 16); + vreg++; + } + else + { + write_memory (sp + argoffset, v_val_buf, 16); + argoffset += 16; + } + } + } + } + + target_store_registers (-1); + return sp; +} + +/* Until November 2001, gcc was not complying to the SYSV ABI for + returning structures less than or equal to 8 bytes in size. It was + returning everything in memory. When this was corrected, it wasn't + fixed for native platforms. */ +int +ppc_sysv_abi_broken_use_struct_convention (int gcc_p, struct type *value_type) +{ + if (TYPE_LENGTH (value_type) == 16 + && TYPE_VECTOR (value_type)) + return 0; + + return generic_use_struct_convention (gcc_p, value_type); +} + +/* Structures 8 bytes or less long are returned in the r3 & r4 + registers, according to the SYSV ABI. */ +int +ppc_sysv_abi_use_struct_convention (int gcc_p, struct type *value_type) +{ + if (TYPE_LENGTH (value_type) == 16 + && TYPE_VECTOR (value_type)) + return 0; + + return (TYPE_LENGTH (value_type) > 8); +} diff --git a/gdb/ppc-tdep.h b/gdb/ppc-tdep.h index 3da66ad..2f40742 100644 --- a/gdb/ppc-tdep.h +++ b/gdb/ppc-tdep.h @@ -22,6 +22,8 @@ #ifndef PPC_TDEP_H #define PPC_TDEP_H +#include "osabi.h" + struct frame_info; struct value; @@ -52,7 +54,7 @@ int altivec_register_p (int regno); struct gdbarch_tdep { int wordsize; /* size in bytes of fixed-point word */ - int osabi; /* OS / ABI from ELF header */ + enum gdb_osabi osabi; /* OS / ABI from ELF header */ int *regoff; /* byte offsets in register arrays */ const struct reg *regs; /* from current variant */ int ppc_gp0_regnum; /* GPR register 0 */ diff --git a/gdb/ppcnbsd-nat.c b/gdb/ppcnbsd-nat.c index 2e43ce4..ce097d7 100644 --- a/gdb/ppcnbsd-nat.c +++ b/gdb/ppcnbsd-nat.c @@ -25,8 +25,6 @@ #include "defs.h" #include "inferior.h" -#include "gdbcore.h" -#include "regcache.h" #include "ppc-tdep.h" #include "ppcnbsd-tdep.h" diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c index 2ba81ea..f91de78 100644 --- a/gdb/rs6000-tdep.c +++ b/gdb/rs6000-tdep.c @@ -2402,88 +2402,7 @@ find_variant_by_arch (enum bfd_architecture arch, unsigned long mach) return NULL; } - - - - -static void -process_note_abi_tag_sections (bfd *abfd, asection *sect, void *obj) -{ - int *os_ident_ptr = obj; - const char *name; - unsigned int sectsize; - - name = bfd_get_section_name (abfd, sect); - sectsize = bfd_section_size (abfd, sect); - if (strcmp (name, ".note.ABI-tag") == 0 && sectsize > 0) - { - unsigned int name_length, data_length, note_type; - char *note = alloca (sectsize); - - bfd_get_section_contents (abfd, sect, note, - (file_ptr) 0, (bfd_size_type) sectsize); - - name_length = bfd_h_get_32 (abfd, note); - data_length = bfd_h_get_32 (abfd, note + 4); - note_type = bfd_h_get_32 (abfd, note + 8); - - if (name_length == 4 && data_length == 16 && note_type == 1 - && strcmp (note + 12, "GNU") == 0) - { - int os_number = bfd_h_get_32 (abfd, note + 16); - - /* The case numbers are from abi-tags in glibc */ - switch (os_number) - { - case 0 : - *os_ident_ptr = ELFOSABI_LINUX; - break; - case 1 : - *os_ident_ptr = ELFOSABI_HURD; - break; - case 2 : - *os_ident_ptr = ELFOSABI_SOLARIS; - break; - default : - internal_error (__FILE__, __LINE__, - "process_note_abi_sections: unknown OS number %d", - os_number); - break; - } - } - } -} - -/* Return one of the ELFOSABI_ constants for BFDs representing ELF - executables. If it's not an ELF executable or if the OS/ABI couldn't - be determined, simply return -1. */ - -static int -get_elfosabi (bfd *abfd) -{ - int elfosabi = -1; - - if (abfd != NULL && bfd_get_flavour (abfd) == bfd_target_elf_flavour) - { - elfosabi = elf_elfheader (abfd)->e_ident[EI_OSABI]; - - /* When elfosabi is 0 (ELFOSABI_NONE), this is supposed to indicate - that we're on a SYSV system. However, GNU/Linux uses a note section - to record OS/ABI info, but leaves e_ident[EI_OSABI] zero. So we - have to check the note sections too. */ - if (elfosabi == 0) - { - bfd_map_over_sections (abfd, - process_note_abi_tag_sections, - &elfosabi); - } - } - - return elfosabi; -} - - /* Initialize the current architecture based on INFO. If possible, re-use an architecture from ARCHES, which is a list of architectures already created during this debugging session. @@ -2502,7 +2421,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) enum bfd_architecture arch; unsigned long mach; bfd abfd; - int osabi, sysv_abi; + int sysv_abi; + enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; gdbarch_print_insn_ftype *print_insn; from_xcoff_exec = info.abfd && info.abfd->format == bfd_object && @@ -2513,7 +2433,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) sysv_abi = info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; - osabi = get_elfosabi (info.abfd); + if (info.abfd) + osabi = gdbarch_lookup_osabi (info.abfd); /* Check word size. If INFO is from a binary file, infer it from that, else choose a likely default. */ @@ -2726,57 +2647,23 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) /* Not sure on this. FIXMEmgo */ set_gdbarch_frame_args_skip (gdbarch, 8); - /* Until November 2001, gcc was not complying to the SYSV ABI for - returning structures less than or equal to 8 bytes in size. It was - returning everything in memory. When this was corrected, it wasn't - fixed for native platforms. */ if (sysv_abi) - { - if (osabi == ELFOSABI_LINUX - || osabi == ELFOSABI_NETBSD - || osabi == ELFOSABI_FREEBSD) - set_gdbarch_use_struct_convention (gdbarch, - ppc_sysv_abi_broken_use_struct_convention); - else - set_gdbarch_use_struct_convention (gdbarch, - ppc_sysv_abi_use_struct_convention); - } + set_gdbarch_use_struct_convention (gdbarch, + ppc_sysv_abi_use_struct_convention); else - { - set_gdbarch_use_struct_convention (gdbarch, - generic_use_struct_convention); - } + set_gdbarch_use_struct_convention (gdbarch, + generic_use_struct_convention); set_gdbarch_frame_chain_valid (gdbarch, file_frame_chain_valid); - /* Note: kevinb/2002-04-12: See note above regarding *_push_arguments(). - The same remarks hold for the methods below. */ - if (osabi == ELFOSABI_LINUX && wordsize == 4) - { - set_gdbarch_frameless_function_invocation (gdbarch, - ppc_linux_frameless_function_invocation); - set_gdbarch_frame_chain (gdbarch, ppc_linux_frame_chain); - set_gdbarch_frame_saved_pc (gdbarch, ppc_linux_frame_saved_pc); - - set_gdbarch_frame_init_saved_regs (gdbarch, - ppc_linux_frame_init_saved_regs); - set_gdbarch_init_extra_frame_info (gdbarch, - ppc_linux_init_extra_frame_info); - - set_gdbarch_memory_remove_breakpoint (gdbarch, - ppc_linux_memory_remove_breakpoint); - set_solib_svr4_fetch_link_map_offsets - (gdbarch, ppc_linux_svr4_fetch_link_map_offsets); - } - else - { - set_gdbarch_frameless_function_invocation (gdbarch, - rs6000_frameless_function_invocation); - set_gdbarch_frame_chain (gdbarch, rs6000_frame_chain); - set_gdbarch_frame_saved_pc (gdbarch, rs6000_frame_saved_pc); - set_gdbarch_frame_init_saved_regs (gdbarch, rs6000_frame_init_saved_regs); - set_gdbarch_init_extra_frame_info (gdbarch, rs6000_init_extra_frame_info); - } + set_gdbarch_frameless_function_invocation (gdbarch, + rs6000_frameless_function_invocation); + set_gdbarch_frame_chain (gdbarch, rs6000_frame_chain); + set_gdbarch_frame_saved_pc (gdbarch, rs6000_frame_saved_pc); + + set_gdbarch_frame_init_saved_regs (gdbarch, rs6000_frame_init_saved_regs); + set_gdbarch_init_extra_frame_info (gdbarch, rs6000_init_extra_frame_info); + if (!sysv_abi) { /* Handle RS/6000 function pointers (which are really function @@ -2792,9 +2679,24 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) now that the C compiler delays popping them. */ set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); + /* Hook in ABI-specific overrides, if they have been registered. */ + gdbarch_init_osabi (info, gdbarch, osabi); + return gdbarch; } +static void +rs6000_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); + + if (tdep == NULL) + return; + + fprintf_unfiltered (file, "rs6000_dump_tdep: OS ABI = %s\n", + gdbarch_osabi_name (tdep->osabi)); +} + static struct cmd_list_element *info_powerpc_cmdlist = NULL; static void @@ -2808,8 +2710,8 @@ rs6000_info_powerpc_command (char *args, int from_tty) void _initialize_rs6000_tdep (void) { - register_gdbarch_init (bfd_arch_rs6000, rs6000_gdbarch_init); - register_gdbarch_init (bfd_arch_powerpc, rs6000_gdbarch_init); + gdbarch_register (bfd_arch_rs6000, rs6000_gdbarch_init, rs6000_dump_tdep); + gdbarch_register (bfd_arch_powerpc, rs6000_gdbarch_init, rs6000_dump_tdep); /* Add root prefix command for "info powerpc" commands */ add_prefix_cmd ("powerpc", class_info, rs6000_info_powerpc_command, @@ -2819,5 +2721,4 @@ _initialize_rs6000_tdep (void) add_cmd ("altivec", class_info, rs6000_altivec_registers_info, "Display the contents of the AltiVec registers.", &info_powerpc_cmdlist); - } |