diff options
Diffstat (limited to 'sysdeps/linux-gnu/trace.h')
| -rw-r--r-- | sysdeps/linux-gnu/trace.h | 57 |
1 files changed, 45 insertions, 12 deletions
diff --git a/sysdeps/linux-gnu/trace.h b/sysdeps/linux-gnu/trace.h index 88ac33d..1599738 100644 --- a/sysdeps/linux-gnu/trace.h +++ b/sysdeps/linux-gnu/trace.h @@ -1,6 +1,6 @@ /* * This file is part of ltrace. - * Copyright (C) 2011,2012 Petr Machata, Red Hat Inc. + * Copyright (C) 2011,2012,2013 Petr Machata, Red Hat Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as @@ -18,8 +18,8 @@ * 02110-1301 USA */ -#ifndef _LTRACE_LINUX_TRACE_H_ -#define _LTRACE_LINUX_TRACE_H_ +#ifndef LTRACE_LINUX_TRACE_H +#define LTRACE_LINUX_TRACE_H #include "proc.h" @@ -59,13 +59,13 @@ struct process_stopping_handler struct event_handler super; /* The task that is doing the re-enablement. */ - struct Process *task_enabling_breakpoint; + struct process *task_enabling_breakpoint; /* The pointer being re-enabled. */ struct breakpoint *breakpoint_being_enabled; - /* Artificial atomic skip breakpoint, if any needed. */ - void *atomic_skip_bp_addrs[2]; + /* Software singlestep breakpoints, if any needed. */ + struct breakpoint *sws_bps[2]; /* When all tasks are stopped, this callback gets called. */ void (*on_all_stopped)(struct process_stopping_handler *); @@ -84,17 +84,17 @@ struct process_stopping_handler enum { /* We are waiting for everyone to land in t/T. */ - psh_stopping = 0, + PSH_STOPPING = 0, /* We are doing the PTRACE_SINGLESTEP. */ - psh_singlestep, + PSH_SINGLESTEP, /* We are waiting for all the SIGSTOPs to arrive so * that we can sink them. */ - psh_sinking, + PSH_SINKING, /* This is for tracking the ugly workaround. */ - psh_ugly_workaround, + PSH_UGLY_WORKAROUND, } state; int exiting; @@ -108,7 +108,7 @@ struct process_stopping_handler * ON_ALL_STOPPED is LINUX_PTRACE_DISABLE_AND_SINGLESTEP, the default * for KEEP_STEPPING_P and UGLY_WORKAROUND_P is "no". */ int process_install_stopping_handler - (struct Process *proc, struct breakpoint *sbp, + (struct process *proc, struct breakpoint *sbp, void (*on_all_stopped)(struct process_stopping_handler *), enum callback_status (*keep_stepping_p) (struct process_stopping_handler *), @@ -118,4 +118,37 @@ int process_install_stopping_handler void linux_ptrace_disable_and_singlestep(struct process_stopping_handler *self); void linux_ptrace_disable_and_continue(struct process_stopping_handler *self); -#endif /* _LTRACE_LINUX_TRACE_H_ */ +/* When main binary needs to call an IFUNC function defined in the + * binary itself, a PLT entry is set up so that dynamic linker can get + * involved and resolve the symbol. But unlike other PLT relocation, + * this one can't rely on symbol table being available. So it doesn't + * reference the symbol by its name, but by its address, and + * correspondingly, has another type. When arch backend wishes to + * support these IRELATIVE relocations, it should override + * arch_elf_add_plt_entry and dispatch to this function for IRELATIVE + * relocations. + * + * This function behaves as arch_elf_add_plt_entry, except that it + * doesn't take name for a parameter, but instead looks up the name in + * symbol tables in LTE. */ +enum plt_status linux_elf_add_plt_entry_irelative(struct process *proc, + struct ltelf *lte, + GElf_Rela *rela, size_t ndx, + struct library_symbol **ret); + +/* Service routine of the above. Determines a name corresponding to + * ADDR, or invents a new one. Returns NULL on failures, otherwise it + * returns a malloc'd pointer that the caller is responsible for + * freeing. */ +char *linux_elf_find_irelative_name(struct ltelf *lte, GElf_Addr addr); + +/* Returns ${NAME}.IFUNC in a newly-malloc'd block, or NULL on + * failures. */ +char *linux_append_IFUNC_to_name(const char *name); + +/* Returns a statically allocated prototype that represents the + * prototype "void *()". Never fails. */ +struct prototype *linux_IFUNC_prototype(void); + + +#endif /* LTRACE_LINUX_TRACE_H */ |