diff options
| -rw-r--r-- | gdb/ChangeLog | 12 | ||||
| -rw-r--r-- | gdb/Makefile.in | 2 | ||||
| -rw-r--r-- | gdb/config/i386/obsd.mt | 2 | ||||
| -rw-r--r-- | gdb/i386obsd-tdep.c | 121 |
4 files changed, 134 insertions, 3 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 5f59288..1843855 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,15 @@ +2005-01-23 Mark Kettenis <kettenis@gnu.org> + + * i386obsd-tdep.c: Update copyright year. Include + "bsd-uthread.h". + (i386obsd_uthread_reg_offset): New variable. + (I386OBSD_UTHREAD_ESP_OFFSET): New define. + (i386obsd_supply_uthread, i386obsd_collect_uthread): New + functions. + (i386obsd_init_abi): Set supply_uthread and collect_uthread. + * Makefile.in (i386obsd-tdep.o): Update dependencies. + * config/i386/obsd.mt (TDEPFILES): Add bsd-uthread.o. + 2005-01-23 Christopher Faylor <cgf@timesys.com> * win32-nat.c: Update copyright year. diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 6a530ba..5184070 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -2044,7 +2044,7 @@ i386obsd-nat.o: i386obsd-nat.c $(defs_h) $(i386_tdep_h) i386obsd-tdep.o: i386obsd-tdep.c $(defs_h) $(arch_utils_h) $(frame_h) \ $(gdbcore_h) $(regcache_h) $(regset_h) $(symtab_h) $(objfiles_h) \ $(osabi_h) $(target_h) $(gdb_assert_h) $(gdb_string_h) \ - $(i386_tdep_h) $(i387_tdep_h) $(solib_svr4_h) + $(i386_tdep_h) $(i387_tdep_h) $(solib_svr4_h) $(bsd_uthread_h) i386-sol2-nat.o: i386-sol2-nat.c $(defs_h) $(regcache_h) $(gregset_h) \ $(amd64_nat_h) $(amd64_tdep_h) i386-sol2-tdep.o: i386-sol2-tdep.c $(defs_h) $(value_h) $(osabi_h) \ diff --git a/gdb/config/i386/obsd.mt b/gdb/config/i386/obsd.mt index b90fbf3..4ce78c1 100644 --- a/gdb/config/i386/obsd.mt +++ b/gdb/config/i386/obsd.mt @@ -1,4 +1,4 @@ # Target: OpenBSD/i386 TDEPFILES= i386-tdep.o i387-tdep.o i386bsd-tdep.o i386obsd-tdep.o \ - corelow.o solib.o solib-svr4.o + bsd-uthread.o corelow.o solib.o solib-svr4.o DEPRECATED_TM_FILE= solib.h diff --git a/gdb/i386obsd-tdep.c b/gdb/i386obsd-tdep.c index 4c9b88d..5eb0444 100644 --- a/gdb/i386obsd-tdep.c +++ b/gdb/i386obsd-tdep.c @@ -1,7 +1,7 @@ /* Target-dependent code for OpenBSD/i386. Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001, 2002, - 2003, 2004 + 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of GDB. @@ -38,6 +38,7 @@ #include "i386-tdep.h" #include "i387-tdep.h" #include "solib-svr4.h" +#include "bsd-uthread.h" /* Support for signal handlers. */ @@ -186,6 +187,120 @@ int i386obsd_sc_reg_offset[I386_NUM_GREGS] = 0 * 4 /* %gs */ }; +/* From /usr/src/lib/libpthread/arch/i386/uthread_machdep.c. */ +static int i386obsd_uthread_reg_offset[] = +{ + 11 * 4, /* %eax */ + 10 * 4, /* %ecx */ + 9 * 4, /* %edx */ + 8 * 4, /* %ebx */ + -1, /* %esp */ + 6 * 4, /* %ebp */ + 5 * 4, /* %esi */ + 4 * 4, /* %edi */ + 12 * 4, /* %eip */ + -1, /* %eflags */ + 13 * 4, /* %cs */ + -1, /* %ss */ + 3 * 4, /* %ds */ + 2 * 4, /* %es */ + 1 * 4, /* %fs */ + 0 * 4 /* %gs */ +}; + +/* Offset within the thread structure where we can find the saved + stack pointer (%esp). */ +#define I386OBSD_UTHREAD_ESP_OFFSET 176 + +static void +i386obsd_supply_uthread (struct regcache *regcache, + int regnum, CORE_ADDR addr) +{ + CORE_ADDR sp_addr = addr + I386OBSD_UTHREAD_ESP_OFFSET; + CORE_ADDR sp = 0; + char buf[4]; + int i; + + gdb_assert (regnum >= -1); + + if (regnum == -1 || regnum == I386_ESP_REGNUM) + { + int offset; + + /* Fetch stack pointer from thread structure. */ + sp = read_memory_unsigned_integer (sp_addr, 4); + + /* Adjust the stack pointer such that it looks as if we just + returned from _thread_machdep_switch. */ + offset = i386obsd_uthread_reg_offset[I386_EIP_REGNUM] + 4; + store_unsigned_integer (buf, 4, sp + offset); + regcache_raw_supply (regcache, I386_ESP_REGNUM, buf); + } + + for (i = 0; i < ARRAY_SIZE (i386obsd_uthread_reg_offset); i++) + { + if (i386obsd_uthread_reg_offset[i] != -1 + && (regnum == -1 || regnum == i)) + { + /* Fetch stack pointer from thread structure (if we didn't + do so already). */ + if (sp == 0) + sp = read_memory_unsigned_integer (sp_addr, 4); + + /* Read the saved register from the stack frame. */ + read_memory (sp + i386obsd_uthread_reg_offset[i], buf, 4); + regcache_raw_supply (regcache, i, buf); + } + } + +} + +static void +i386obsd_collect_uthread (const struct regcache *regcache, + int regnum, CORE_ADDR addr) +{ + CORE_ADDR sp_addr = addr + I386OBSD_UTHREAD_ESP_OFFSET; + CORE_ADDR sp = 0; + char buf[4]; + int i; + + gdb_assert (regnum >= -1); + + if (regnum == -1 || regnum == I386_ESP_REGNUM) + { + int offset; + + /* Calculate the stack pointer (frame pointer) that will be + stored into the thread structure. */ + offset = i386obsd_uthread_reg_offset[I386_EIP_REGNUM] + 4; + regcache_raw_collect (regcache, I386_ESP_REGNUM, buf); + sp = extract_unsigned_integer (buf, 4) - offset; + + /* Store the stack pointer. */ + write_memory_unsigned_integer (sp_addr, 4, sp); + + /* The stack pointer was (potentially) modified. Make sure we + build a proper stack frame. */ + regnum = -1; + } + + for (i = 0; i < ARRAY_SIZE (i386obsd_uthread_reg_offset); i++) + { + if (i386obsd_uthread_reg_offset[i] != -1 + && (regnum == -1 || regnum == i)) + { + /* Fetch stack pointer from thread structure (if we didn't + calculate it already). */ + if (sp == 0) + sp = read_memory_unsigned_integer (sp_addr, 4); + + /* Write the register into the stack frame. */ + regcache_raw_collect (regcache, i, buf); + write_memory (sp + i386obsd_uthread_reg_offset[i], buf, 4); + } + } +} + static void i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { @@ -211,6 +326,10 @@ i386obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) original 4.3 BSD. */ tdep->sc_reg_offset = i386obsd_sc_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (i386obsd_sc_reg_offset); + + /* OpenBSD provides a user-level threads implementation. */ + bsd_uthread_set_supply_uthread (gdbarch, i386obsd_supply_uthread); + bsd_uthread_set_collect_uthread (gdbarch, i386obsd_collect_uthread); } /* OpenBSD a.out. */ |