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linux-user/elfload: Use Error for load_elf_image 

This is a bit clearer than open-coding some of this
with a bare c string.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201021173749.111103-9-richard.henderson@linaro.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-10-21 10:37:45 -07:00 committed by Peter Maydell
parent 8a1a5274c9
commit c7f17e7bd7
1 changed files with 20 additions and 17 deletions
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37
linux-user/elfload.c
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@ -12,6 +12,7 @@
#include "qemu/guest-random.h"
#include "qemu/units.h"
#include "qemu/selfmap.h"
#include "qapi/error.h"
#ifdef _ARCH_PPC64
#undef ARCH_DLINFO
@ -2392,15 +2393,16 @@ static void load_elf_image(const char *image_name, int image_fd,
struct elf_phdr *phdr;
abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
int i, retval;
const char *errmsg;
Error *err = NULL;
/* First of all, some simple consistency checks */
errmsg = "Invalid ELF image for this architecture";
if (!elf_check_ident(ehdr)) {
error_setg(&err, "Invalid ELF image for this architecture");
goto exit_errmsg;
}
bswap_ehdr(ehdr);
if (!elf_check_ehdr(ehdr)) {
error_setg(&err, "Invalid ELF image for this architecture");
goto exit_errmsg;
}
@ -2444,13 +2446,11 @@ static void load_elf_image(const char *image_name, int image_fd,
g_autofree char *interp_name = NULL;
if (*pinterp_name) {
errmsg = "Multiple PT_INTERP entries";
error_setg(&err, "Multiple PT_INTERP entries");
goto exit_errmsg;
}
interp_name = g_malloc(eppnt->p_filesz);
if (!interp_name) {
goto exit_perror;
}
if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
memcpy(interp_name, bprm_buf + eppnt->p_offset,
@ -2459,11 +2459,11 @@ static void load_elf_image(const char *image_name, int image_fd,
retval = pread(image_fd, interp_name, eppnt->p_filesz,
eppnt->p_offset);
if (retval != eppnt->p_filesz) {
goto exit_perror;
goto exit_read;
}
}
if (interp_name[eppnt->p_filesz - 1] != 0) {
errmsg = "Invalid PT_INTERP entry";
error_setg(&err, "Invalid PT_INTERP entry");
goto exit_errmsg;
}
*pinterp_name = g_steal_pointer(&interp_name);
@ -2520,7 +2520,7 @@ static void load_elf_image(const char *image_name, int image_fd,
(ehdr->e_type == ET_EXEC ? MAP_FIXED : 0),
-1, 0);
if (load_addr == -1) {
goto exit_perror;
goto exit_mmap;
}
load_bias = load_addr - loaddr;
@ -2587,7 +2587,7 @@ static void load_elf_image(const char *image_name, int image_fd,
image_fd, eppnt->p_offset - vaddr_po);
if (error == -1) {
goto exit_perror;
goto exit_mmap;
}
}
@ -2623,7 +2623,7 @@ static void load_elf_image(const char *image_name, int image_fd,
} else if (eppnt->p_type == PT_MIPS_ABIFLAGS) {
Mips_elf_abiflags_v0 abiflags;
if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) {
errmsg = "Invalid PT_MIPS_ABIFLAGS entry";
error_setg(&err, "Invalid PT_MIPS_ABIFLAGS entry");
goto exit_errmsg;
}
if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
@ -2633,7 +2633,7 @@ static void load_elf_image(const char *image_name, int image_fd,
retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0),
eppnt->p_offset);
if (retval != sizeof(Mips_elf_abiflags_v0)) {
goto exit_perror;
goto exit_read;
}
}
bswap_mips_abiflags(&abiflags);
@ -2658,13 +2658,16 @@ static void load_elf_image(const char *image_name, int image_fd,
exit_read:
if (retval >= 0) {
errmsg = "Incomplete read of file header";
goto exit_errmsg;
error_setg(&err, "Incomplete read of file header");
} else {
error_setg_errno(&err, errno, "Error reading file header");
}
exit_perror:
errmsg = strerror(errno);
goto exit_errmsg;
exit_mmap:
error_setg_errno(&err, errno, "Error mapping file");
goto exit_errmsg;
exit_errmsg:
fprintf(stderr, "%s: %s\n", image_name, errmsg);
error_reportf_err(err, "%s: ", image_name);
exit(-1);
}