git: 7256167dfd80 - stable/13 - linux: refactor bsd_to_linux_regset() out of linux_ptrace.c
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Date: Mon, 21 Feb 2022 13:48:49 UTC
The branch stable/13 has been updated by trasz: URL: https://cgit.FreeBSD.org/src/commit/?id=7256167dfd80bcbdbbe564a3e7348f09df6c4c7c commit 7256167dfd80bcbdbbe564a3e7348f09df6c4c7c Author: Edward Tomasz Napierala <trasz@FreeBSD.org> AuthorDate: 2021-05-21 06:22:25 +0000 Commit: Edward Tomasz Napierala <trasz@FreeBSD.org> CommitDate: 2022-02-21 12:46:06 +0000 linux: refactor bsd_to_linux_regset() out of linux_ptrace.c This will be used for Linux coredump support. Sponsored By: EPSRC Differential Revision: https://reviews.freebsd.org/D30365 (cherry picked from commit 95c19e1d65619624db4a7a21afc1685f122a05c1) --- sys/amd64/linux/linux.h | 36 +++++++++++++++++++++++++++++ sys/amd64/linux/linux_ptrace.c | 46 ++++++------------------------------- sys/amd64/linux32/linux.h | 26 +++++++++++++++++++++ sys/amd64/linux32/linux32_machdep.c | 24 +++++++++++++++++++ 4 files changed, 93 insertions(+), 39 deletions(-) diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h index dc4986817d11..4e27fd51a72d 100644 --- a/sys/amd64/linux/linux.h +++ b/sys/amd64/linux/linux.h @@ -446,4 +446,40 @@ struct linux_robust_list_head { l_uintptr_t pending_list; }; +/* This corresponds to 'struct user_regs_struct' in Linux. */ +struct linux_pt_regset { + l_ulong r15; + l_ulong r14; + l_ulong r13; + l_ulong r12; + l_ulong rbp; + l_ulong rbx; + l_ulong r11; + l_ulong r10; + l_ulong r9; + l_ulong r8; + l_ulong rax; + l_ulong rcx; + l_ulong rdx; + l_ulong rsi; + l_ulong rdi; + l_ulong orig_rax; + l_ulong rip; + l_ulong cs; + l_ulong eflags; + l_ulong rsp; + l_ulong ss; + l_ulong fs_base; + l_ulong gs_base; + l_ulong ds; + l_ulong es; + l_ulong fs; + l_ulong gs; +}; + +struct reg; + +void bsd_to_linux_regset(struct reg *b_reg, + struct linux_pt_regset *l_regset); + #endif /* !_AMD64_LINUX_H_ */ diff --git a/sys/amd64/linux/linux_ptrace.c b/sys/amd64/linux/linux_ptrace.c index 4557cea0502e..8fb87a8536b6 100644 --- a/sys/amd64/linux/linux_ptrace.c +++ b/sys/amd64/linux/linux_ptrace.c @@ -173,36 +173,6 @@ struct linux_pt_reg { l_ulong ss; }; -struct linux_pt_regset { - l_ulong r15; - l_ulong r14; - l_ulong r13; - l_ulong r12; - l_ulong rbp; - l_ulong rbx; - l_ulong r11; - l_ulong r10; - l_ulong r9; - l_ulong r8; - l_ulong rax; - l_ulong rcx; - l_ulong rdx; - l_ulong rsi; - l_ulong rdi; - l_ulong orig_rax; - l_ulong rip; - l_ulong cs; - l_ulong eflags; - l_ulong rsp; - l_ulong ss; - l_ulong fs_base; - l_ulong gs_base; - l_ulong ds; - l_ulong es; - l_ulong fs; - l_ulong gs; -}; - /* * Translate amd64 ptrace registers between Linux and FreeBSD formats. * The translation is pretty straighforward, for all registers but @@ -235,9 +205,8 @@ map_regs_to_linux(struct reg *b_reg, struct linux_pt_reg *l_reg) l_reg->ss = b_reg->r_ss; } -static void -map_regs_to_linux_regset(struct reg *b_reg, unsigned long fs_base, - unsigned long gs_base, struct linux_pt_regset *l_regset) +void +bsd_to_linux_regset(struct reg *b_reg, struct linux_pt_regset *l_regset) { l_regset->r15 = b_reg->r_r15; @@ -261,8 +230,8 @@ map_regs_to_linux_regset(struct reg *b_reg, unsigned long fs_base, l_regset->eflags = b_reg->r_rflags; l_regset->rsp = b_reg->r_rsp; l_regset->ss = b_reg->r_ss; - l_regset->fs_base = fs_base; - l_regset->gs_base = gs_base; + l_regset->fs_base = 0; + l_regset->gs_base = 0; l_regset->ds = b_reg->r_ds; l_regset->es = b_reg->r_es; l_regset->fs = b_reg->r_fs; @@ -476,7 +445,6 @@ linux_ptrace_getregset_prstatus(struct thread *td, pid_t pid, l_ulong data) struct linux_pt_regset l_regset; struct iovec iov; struct pcb *pcb; - unsigned long fsbase, gsbase; size_t len; int error; @@ -493,10 +461,10 @@ linux_ptrace_getregset_prstatus(struct thread *td, pid_t pid, l_ulong data) pcb = td->td_pcb; if (td == curthread) update_pcb_bases(pcb); - fsbase = pcb->pcb_fsbase; - gsbase = pcb->pcb_gsbase; - map_regs_to_linux_regset(&b_reg, fsbase, gsbase, &l_regset); + bsd_to_linux_regset(&b_reg, &l_regset); + l_regset.fs_base = pcb->pcb_fsbase; + l_regset.gs_base = pcb->pcb_gsbase; error = kern_ptrace(td, PT_LWPINFO, pid, &lwpinfo, sizeof(lwpinfo)); if (error != 0) { diff --git a/sys/amd64/linux32/linux.h b/sys/amd64/linux32/linux.h index 244daba4b5c0..286b9b52801c 100644 --- a/sys/amd64/linux32/linux.h +++ b/sys/amd64/linux32/linux.h @@ -630,4 +630,30 @@ struct linux_robust_list_head { l_uintptr_t pending_list; }; +/* This corresponds to 'struct user_regs_struct32' in Linux. */ +struct linux_pt_regset32 { + l_uint ebx; + l_uint ecx; + l_uint edx; + l_uint esi; + l_uint edi; + l_uint ebp; + l_uint eax; + l_uint ds; + l_uint es; + l_uint fs; + l_uint gs; + l_uint orig_eax; + l_uint eip; + l_uint cs; + l_uint eflags; + l_uint esp; + l_uint ss; +}; + +struct reg32; + +void bsd_to_linux_regset32(struct reg32 *b_reg, + struct linux_pt_regset32 *l_regset); + #endif /* !_AMD64_LINUX_H_ */ diff --git a/sys/amd64/linux32/linux32_machdep.c b/sys/amd64/linux32/linux32_machdep.c index ffb04daa852e..1cfda5d60e13 100644 --- a/sys/amd64/linux32/linux32_machdep.c +++ b/sys/amd64/linux32/linux32_machdep.c @@ -61,6 +61,7 @@ __FBSDID("$FreeBSD$"); #include <machine/md_var.h> #include <machine/pcb.h> #include <machine/psl.h> +#include <machine/reg.h> #include <machine/segments.h> #include <machine/specialreg.h> #include <x86/ifunc.h> @@ -703,6 +704,29 @@ linux_set_thread_area(struct thread *td, return (0); } +void +bsd_to_linux_regset32(struct reg32 *b_reg, struct linux_pt_regset32 *l_regset) +{ + + l_regset->ebx = b_reg->r_ebx; + l_regset->ecx = b_reg->r_ecx; + l_regset->edx = b_reg->r_edx; + l_regset->esi = b_reg->r_esi; + l_regset->edi = b_reg->r_edi; + l_regset->ebp = b_reg->r_ebp; + l_regset->eax = b_reg->r_eax; + l_regset->ds = b_reg->r_ds; + l_regset->es = b_reg->r_es; + l_regset->fs = b_reg->r_fs; + l_regset->gs = b_reg->r_gs; + l_regset->orig_eax = b_reg->r_eax; + l_regset->eip = b_reg->r_eip; + l_regset->cs = b_reg->r_cs; + l_regset->eflags = b_reg->r_eflags; + l_regset->esp = b_reg->r_esp; + l_regset->ss = b_reg->r_ss; +} + int futex_xchgl_nosmap(int oparg, uint32_t *uaddr, int *oldval); int futex_xchgl_smap(int oparg, uint32_t *uaddr, int *oldval); DEFINE_IFUNC(, int, futex_xchgl, (int, uint32_t *, int *))