X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsparc-linux-tdep.c;h=e1ba8c60b2ea7062a15d660ebeb5062728deb243;hb=8380882108b7c11864212eab15eeb5d4c9a3b138;hp=83d7589d1fe12ec0f145fadabd7f93e310621736;hpb=87a7da84fb7962a7e52700eb154a959166e17eac;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/sparc-linux-tdep.c b/gdb/sparc-linux-tdep.c index 83d7589d1f..e1ba8c60b2 100644 --- a/gdb/sparc-linux-tdep.c +++ b/gdb/sparc-linux-tdep.c @@ -1,6 +1,6 @@ /* Target-dependent code for GNU/Linux SPARC. - Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2003-2020 Free Software Foundation, Inc. This file is part of GDB. @@ -31,6 +31,11 @@ #include "symtab.h" #include "trad-frame.h" #include "tramp-frame.h" +#include "xml-syscall.h" +#include "linux-tdep.h" + +/* The syscall's XML filename for sparc 32-bit. */ +#define XML_SYSCALL_FILENAME_SPARC32 "syscalls/sparc-linux.xml" #include "sparc-tdep.h" @@ -63,9 +68,9 @@ static const struct tramp_frame sparc32_linux_sigframe = SIGTRAMP_FRAME, 4, { - { 0x821020d8, -1 }, /* mov __NR_sugreturn, %g1 */ - { 0x91d02010, -1 }, /* ta 0x10 */ - { TRAMP_SENTINEL_INSN, -1 } + { 0x821020d8, ULONGEST_MAX }, /* mov __NR_sigreturn, %g1 */ + { 0x91d02010, ULONGEST_MAX }, /* ta 0x10 */ + { TRAMP_SENTINEL_INSN, ULONGEST_MAX } }, sparc32_linux_sigframe_init }; @@ -78,13 +83,38 @@ static const struct tramp_frame sparc32_linux_rt_sigframe = SIGTRAMP_FRAME, 4, { - { 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */ - { 0x91d02010, -1 }, /* ta 0x10 */ - { TRAMP_SENTINEL_INSN, -1 } + { 0x82102065, ULONGEST_MAX }, /* mov __NR_rt_sigreturn, %g1 */ + { 0x91d02010, ULONGEST_MAX }, /* ta 0x10 */ + { TRAMP_SENTINEL_INSN, ULONGEST_MAX } }, sparc32_linux_sigframe_init }; +/* This enum represents the signals' numbers on the SPARC + architecture. It just contains the signal definitions which are + different from the generic implementation. + + It is derived from the file , + from the Linux kernel tree. */ + +enum + { + SPARC_LINUX_SIGEMT = 7, + SPARC_LINUX_SIGBUS = 10, + SPARC_LINUX_SIGSYS = 12, + SPARC_LINUX_SIGURG = 16, + SPARC_LINUX_SIGSTOP = 17, + SPARC_LINUX_SIGTSTP = 18, + SPARC_LINUX_SIGCONT = 19, + SPARC_LINUX_SIGCHLD = 20, + SPARC_LINUX_SIGIO = 23, + SPARC_LINUX_SIGPOLL = SPARC_LINUX_SIGIO, + SPARC_LINUX_SIGLOST = 29, + SPARC_LINUX_SIGPWR = SPARC_LINUX_SIGLOST, + SPARC_LINUX_SIGUSR1 = 30, + SPARC_LINUX_SIGUSR2 = 31, + }; + static void sparc32_linux_sigframe_init (const struct tramp_frame *self, struct frame_info *this_frame, @@ -135,9 +165,12 @@ sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn) { ULONGEST sc_num = get_frame_register_unsigned (frame, SPARC_G1_REGNUM); - /* __NR_rt_sigreturn is 101 and __NR_sigreturn is 216 */ + /* __NR_rt_sigreturn is 101 and __NR_sigreturn is 216. */ if (sc_num == 101 || sc_num == 216) { + struct gdbarch *gdbarch = get_frame_arch (frame); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + ULONGEST sp, pc_offset; sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM); @@ -157,7 +190,7 @@ sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn) if (sc_num == 101) pc_offset += 128; - return read_memory_unsigned_integer (sp + pc_offset, 4); + return read_memory_unsigned_integer (sp + pc_offset, 4, byte_order); } } @@ -165,7 +198,7 @@ sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn) } -const struct sparc_gregset sparc32_linux_core_gregset = +const struct sparc_gregmap sparc32_linux_core_gregmap = { 32 * 4, /* %psr */ 33 * 4, /* %pc */ @@ -184,7 +217,8 @@ sparc32_linux_supply_core_gregset (const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len) { - sparc32_supply_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs); + sparc32_supply_gregset (&sparc32_linux_core_gregmap, + regcache, regnum, gregs); } static void @@ -192,7 +226,8 @@ sparc32_linux_collect_core_gregset (const struct regset *regset, const struct regcache *regcache, int regnum, void *gregs, size_t len) { - sparc32_collect_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs); + sparc32_collect_gregset (&sparc32_linux_core_gregmap, + regcache, regnum, gregs); } static void @@ -200,7 +235,7 @@ sparc32_linux_supply_core_fpregset (const struct regset *regset, struct regcache *regcache, int regnum, const void *fpregs, size_t len) { - sparc32_supply_fpregset (regcache, regnum, fpregs); + sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); } static void @@ -208,22 +243,191 @@ sparc32_linux_collect_core_fpregset (const struct regset *regset, const struct regcache *regcache, int regnum, void *fpregs, size_t len) { - sparc32_collect_fpregset (regcache, regnum, fpregs); + sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs); +} + +/* Set the program counter for process PTID to PC. */ + +#define PSR_SYSCALL 0x00004000 + +static void +sparc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ()); + ULONGEST psr; + + regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc); + regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4); + + /* Clear the "in syscall" bit to prevent the kernel from + messing with the PCs we just installed, if we happen to be + within an interrupted system call that the kernel wants to + restart. + + Note that after we return from the dummy call, the PSR et al. + registers will be automatically restored, and the kernel + continues to restart the system call at this point. */ + regcache_cooked_read_unsigned (regcache, SPARC32_PSR_REGNUM, &psr); + psr &= ~PSR_SYSCALL; + regcache_cooked_write_unsigned (regcache, SPARC32_PSR_REGNUM, psr); +} + +static LONGEST +sparc32_linux_get_syscall_number (struct gdbarch *gdbarch, + thread_info *thread) +{ + struct regcache *regcache = get_thread_regcache (thread); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + /* The content of a register. */ + gdb_byte buf[4]; + /* The result. */ + LONGEST ret; + + /* Getting the system call number from the register. + When dealing with the sparc architecture, this information + is stored at the %g1 register. */ + regcache->cooked_read (SPARC_G1_REGNUM, buf); + + ret = extract_signed_integer (buf, 4, byte_order); + + return ret; +} + +/* Implementation of `gdbarch_gdb_signal_from_target', as defined in + gdbarch.h. */ + +static enum gdb_signal +sparc32_linux_gdb_signal_from_target (struct gdbarch *gdbarch, + int signal) +{ + switch (signal) + { + case SPARC_LINUX_SIGEMT: + return GDB_SIGNAL_EMT; + + case SPARC_LINUX_SIGBUS: + return GDB_SIGNAL_BUS; + + case SPARC_LINUX_SIGSYS: + return GDB_SIGNAL_SYS; + + case SPARC_LINUX_SIGURG: + return GDB_SIGNAL_URG; + + case SPARC_LINUX_SIGSTOP: + return GDB_SIGNAL_STOP; + + case SPARC_LINUX_SIGTSTP: + return GDB_SIGNAL_TSTP; + + case SPARC_LINUX_SIGCONT: + return GDB_SIGNAL_CONT; + + case SPARC_LINUX_SIGCHLD: + return GDB_SIGNAL_CHLD; + + /* No way to differentiate between SIGIO and SIGPOLL. + Therefore, we just handle the first one. */ + case SPARC_LINUX_SIGIO: + return GDB_SIGNAL_IO; + + /* No way to differentiate between SIGLOST and SIGPWR. + Therefore, we just handle the first one. */ + case SPARC_LINUX_SIGLOST: + return GDB_SIGNAL_LOST; + + case SPARC_LINUX_SIGUSR1: + return GDB_SIGNAL_USR1; + + case SPARC_LINUX_SIGUSR2: + return GDB_SIGNAL_USR2; + } + + return linux_gdb_signal_from_target (gdbarch, signal); +} + +/* Implementation of `gdbarch_gdb_signal_to_target', as defined in + gdbarch.h. */ + +static int +sparc32_linux_gdb_signal_to_target (struct gdbarch *gdbarch, + enum gdb_signal signal) +{ + switch (signal) + { + case GDB_SIGNAL_EMT: + return SPARC_LINUX_SIGEMT; + + case GDB_SIGNAL_BUS: + return SPARC_LINUX_SIGBUS; + + case GDB_SIGNAL_SYS: + return SPARC_LINUX_SIGSYS; + + case GDB_SIGNAL_URG: + return SPARC_LINUX_SIGURG; + + case GDB_SIGNAL_STOP: + return SPARC_LINUX_SIGSTOP; + + case GDB_SIGNAL_TSTP: + return SPARC_LINUX_SIGTSTP; + + case GDB_SIGNAL_CONT: + return SPARC_LINUX_SIGCONT; + + case GDB_SIGNAL_CHLD: + return SPARC_LINUX_SIGCHLD; + + case GDB_SIGNAL_IO: + return SPARC_LINUX_SIGIO; + + case GDB_SIGNAL_POLL: + return SPARC_LINUX_SIGPOLL; + + case GDB_SIGNAL_LOST: + return SPARC_LINUX_SIGLOST; + + case GDB_SIGNAL_PWR: + return SPARC_LINUX_SIGPWR; + + case GDB_SIGNAL_USR1: + return SPARC_LINUX_SIGUSR1; + + case GDB_SIGNAL_USR2: + return SPARC_LINUX_SIGUSR2; + } + + return linux_gdb_signal_to_target (gdbarch, signal); } +static const struct regset sparc32_linux_gregset = + { + NULL, + sparc32_linux_supply_core_gregset, + sparc32_linux_collect_core_gregset + }; + +static const struct regset sparc32_linux_fpregset = + { + NULL, + sparc32_linux_supply_core_fpregset, + sparc32_linux_collect_core_fpregset + }; + static void sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - tdep->gregset = regset_alloc (gdbarch, sparc32_linux_supply_core_gregset, - sparc32_linux_collect_core_gregset); + linux_init_abi (info, gdbarch); + + tdep->gregset = &sparc32_linux_gregset; tdep->sizeof_gregset = 152; - tdep->fpregset = regset_alloc (gdbarch, sparc32_linux_supply_core_fpregset, - sparc32_linux_collect_core_fpregset); + tdep->fpregset = &sparc32_linux_fpregset; tdep->sizeof_fpregset = 396; tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_sigframe); @@ -238,10 +442,6 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) prologue analysis. */ tdep->plt_entry_size = 12; - /* GNU/Linux doesn't support the 128-bit `long double' from the psABI. */ - set_gdbarch_long_double_bit (gdbarch, 64); - set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double); - /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); @@ -251,10 +451,19 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Hook in the DWARF CFI frame unwinder. */ dwarf2_append_unwinders (gdbarch); -} -/* Provide a prototype to silence -Wmissing-prototypes. */ -extern void _initialize_sparc_linux_tdep (void); + set_gdbarch_write_pc (gdbarch, sparc_linux_write_pc); + + /* Functions for 'catch syscall'. */ + set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_SPARC32); + set_gdbarch_get_syscall_number (gdbarch, + sparc32_linux_get_syscall_number); + + set_gdbarch_gdb_signal_from_target (gdbarch, + sparc32_linux_gdb_signal_from_target); + set_gdbarch_gdb_signal_to_target (gdbarch, + sparc32_linux_gdb_signal_to_target); +} void _initialize_sparc_linux_tdep (void)