X-Git-Url: https://repo.jachan.dev/binutils.git/blobdiff_plain/c60c0f5f8841d467149bdf0980bd17fb1246ca51..1e6982353631fce67c8b11e8f286395265caac49:/gdb/i386v4-nat.c diff --git a/gdb/i386v4-nat.c b/gdb/i386v4-nat.c index 3ed273e7b1..7de8c14803 100644 --- a/gdb/i386v4-nat.c +++ b/gdb/i386v4-nat.c @@ -1,5 +1,7 @@ -/* Native-dependent code for SVR4 Unix running on i386's, for GDB. - Copyright 1988, 1989, 1991, 1992, 1996, 1998 Free Software Foundation, Inc. +/* Native-dependent code for SVR4 Unix running on i386's. + Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000, + 2001, 2002 + Free Software Foundation, Inc. This file is part of GDB. @@ -21,11 +23,14 @@ #include "defs.h" #include "value.h" #include "inferior.h" +#include "regcache.h" #ifdef HAVE_SYS_REG_H #include #endif +#include "i386-tdep.h" +#include "i387-tdep.h" #ifdef HAVE_SYS_PROCFS_H @@ -34,15 +39,16 @@ /* Prototypes for supply_gregset etc. */ #include "gregset.h" -/* The /proc interface divides the target machine's register set up into - two different sets, the general register set (gregset) and the floating - point register set (fpregset). For each set, there is an ioctl to get - the current register set and another ioctl to set the current values. +/* The `/proc' interface divides the target machine's register set up + into two different sets, the general purpose register set (gregset) + and the floating-point register set (fpregset). For each set, + there is an ioctl to get the current register set and another ioctl + to set the current values. - The actual structure passed through the ioctl interface is, of course, - naturally machine dependent, and is different for each set of registers. - For the i386 for example, the general register set is typically defined - by: + The actual structure passed through the ioctl interface is, of + course, naturally machine dependent, and is different for each set + of registers. For the i386 for example, the general-purpose + register set is typically defined by: typedef int gregset_t[19]; (in ) @@ -52,36 +58,38 @@ #define UESP 17 #define SS 18 - and the floating point set by: - - typedef struct fpregset - { - union - { - struct fpchip_state // fp extension state // - { - int state[27]; // 287/387 saved state // - int status; // status word saved at exception // - } fpchip_state; - struct fp_emul_space // for emulators // - { - char fp_emul[246]; - char fp_epad[2]; - } fp_emul_space; - int f_fpregs[62]; // union of the above // - } fp_reg_set; - long f_wregs[33]; // saved weitek state // + and the floating-point set by: + + typedef struct fpregset { + union { + struct fpchip_state // fp extension state // + { + int state[27]; // 287/387 saved state // + int status; // status word saved at // + // exception // + } fpchip_state; + struct fp_emul_space // for emulators // + { + char fp_emul[246]; + char fp_epad[2]; + } fp_emul_space; + int f_fpregs[62]; // union of the above // + } fp_reg_set; + long f_wregs[33]; // saved weitek state // } fpregset_t; - These routines provide the packing and unpacking of gregset_t and - fpregset_t formatted data. + Incidentally fpchip_state contains the FPU state in the same format + as used by the "fsave" instruction, and that's the only thing we + support here. I don't know how the emulator stores it state. The + Weitek stuff definitely isn't supported. - */ + The routines defined here, provide the packing and unpacking of + gregset_t and fpregset_t formatted data. */ #ifdef HAVE_GREGSET_T -/* This is a duplicate of the table in i386-xdep.c. */ - +/* Mapping between the general-purpose registers in `/proc' + format and GDB's register array layout. */ static int regmap[] = { EAX, ECX, EDX, EBX, @@ -90,167 +98,63 @@ static int regmap[] = DS, ES, FS, GS, }; -/* Prototypes for local functions */ - -void fill_gregset PARAMS ((gregset_t *, int)); - -void supply_gregset PARAMS ((gregset_t *)); - -void supply_fpregset PARAMS ((fpregset_t *)); - -void fill_fpregset PARAMS ((fpregset_t *, int)); - - -/* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS) - being less than or equal to the number of registers that can be stored - in a gregset_t. Note that with the current scheme there will typically - be more registers actually stored in a gregset_t that what we know - about. This is bogus and should be fixed. */ - -/* Given a pointer to a general register set in /proc format (gregset_t *), - unpack the register contents and supply them as gdb's idea of the current - register values. */ +/* Fill GDB's register array with the general-purpose register values + in *GREGSETP. */ void -supply_gregset (gregsetp) - gregset_t *gregsetp; +supply_gregset (gregset_t *gregsetp) { - register int regi; - register greg_t *regp = (greg_t *) gregsetp; - extern int regmap[]; - - for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++) - { - supply_register (regi, (char *) (regp + regmap[regi])); - } + greg_t *regp = (greg_t *) gregsetp; + int i; + + for (i = 0; i < I386_NUM_GREGS; i++) + supply_register (i, (char *) (regp + regmap[i])); } +/* Fill register REGNO (if it is a general-purpose register) in + *GREGSETPS with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ + void -fill_gregset (gregsetp, regno) - gregset_t *gregsetp; - int regno; +fill_gregset (gregset_t *gregsetp, int regno) { - int regi; - register greg_t *regp = (greg_t *) gregsetp; - extern int regmap[]; - - for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++) - { - if ((regno == -1) || (regno == regi)) - { - *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)]; - } - } + greg_t *regp = (greg_t *) gregsetp; + int i; + + for (i = 0; i < I386_NUM_GREGS; i++) + if (regno == -1 || regno == i) + regcache_collect (i, regp + regmap[i]); } #endif /* HAVE_GREGSET_T */ -#if defined (HAVE_FPREGSET_T) +#ifdef HAVE_FPREGSET_T -/* Given a pointer to a floating point register set in /proc format - (fpregset_t *), unpack the register contents and supply them as gdb's - idea of the current floating point register values. */ - -/* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */ -static const int freg_offset_map[] = -{ -#if !defined(FPREGSET_FSAVE_OFFSET) -#define FPREGSET_FSAVE_OFFSET 0 -#endif - FPREGSET_FSAVE_OFFSET + 28 + 0 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 1 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 2 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 3 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 4 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 5 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 6 * 10, - FPREGSET_FSAVE_OFFSET + 28 + 7 * 10, - FPREGSET_FSAVE_OFFSET + 0, - FPREGSET_FSAVE_OFFSET + 4, - FPREGSET_FSAVE_OFFSET + 8, - FPREGSET_FSAVE_OFFSET + 16, - FPREGSET_FSAVE_OFFSET + 12, - FPREGSET_FSAVE_OFFSET + 24, - FPREGSET_FSAVE_OFFSET + 20, - FPREGSET_FSAVE_OFFSET + 16 -}; +/* Fill GDB's register array with the floating-point register values in + *FPREGSETP. */ void -supply_fpregset (fpregsetp) - fpregset_t *fpregsetp; +supply_fpregset (fpregset_t *fpregsetp) { - int regi; - - if (NUM_FREGS == 0) + if (FP0_REGNUM == 0) return; - for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++) - { - char tbuf[4]; - ULONGEST tval; - char *from = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM]; - - if (regi == FCS_REGNUM) - { - tval = extract_unsigned_integer (from, 4) & 0xffff; - store_unsigned_integer (tbuf, 4, tval); - supply_register (regi, tbuf); - } - else if (regi == FOP_REGNUM) - { - tval = (extract_unsigned_integer (from, 4) >> 16) & ((1 << 11) - 1); - store_unsigned_integer (tbuf, 4, tval); - supply_register (regi, tbuf); - } - else - supply_register (regi, from); - } + + i387_supply_fsave ((char *) fpregsetp); } -/* Given a pointer to a floating point register set in /proc format - (fpregset_t *), update the register specified by REGNO from gdb's idea - of the current floating point register set. If REGNO is -1, update - them all. */ +/* Fill register REGNO (if it is a floating-point register) in + *FPREGSETP with the value in GDB's register array. If REGNO is -1, + do this for all registers. */ void -fill_fpregset (fpregsetp, regno) - fpregset_t *fpregsetp; - int regno; +fill_fpregset (fpregset_t *fpregsetp, int regno) { - int regi; - - if (NUM_FREGS == 0) + if (FP0_REGNUM == 0) return; - for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++) - { - if ((regno == -1) || (regno == regi)) - { - char *to = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM]; - char *from = (char *) ®isters[REGISTER_BYTE (regi)]; - ULONGEST valto; - ULONGEST valfrom; - - if (regi == FCS_REGNUM) - { - valto = extract_unsigned_integer (to, 4); - valfrom = extract_unsigned_integer (from, 4); - valto = (valto & ~0xffff) | (valfrom & 0xffff); - store_unsigned_integer (to, 4, valto); - } - else if (regi == FOP_REGNUM) - { - valto = extract_unsigned_integer (to, 4); - valfrom = extract_unsigned_integer (from, 4); - valto = (valto & 0xffff) | ((valfrom & ((1 << 11) - 1)) << 16); - store_unsigned_integer (to, 4, valto); - } - else - { - memcpy (to, from, REGISTER_RAW_SIZE (regi)); - } - } - } + + i387_fill_fsave ((char *) fpregsetp, regno); } -#endif /* defined (HAVE_FPREGSET_T) */ +#endif /* HAVE_FPREGSET_T */ #endif /* HAVE_SYS_PROCFS_H */